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/*
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* AArch64 translation
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*
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* Copyright (c) 2013 Alexander Graf <agraf@suse.de>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdarg.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <inttypes.h> |
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#include "cpu.h" |
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#include "tcg-op.h" |
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#include "qemu/log.h" |
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#include "translate.h" |
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#include "qemu/host-utils.h" |
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#include "exec/gen-icount.h" |
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#include "helper.h" |
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#define GEN_HELPER 1 |
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#include "helper.h" |
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static TCGv_i64 cpu_X[32]; |
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static TCGv_i64 cpu_pc;
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static TCGv_i32 cpu_NF, cpu_ZF, cpu_CF, cpu_VF;
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/* Load/store exclusive handling */
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static TCGv_i64 cpu_exclusive_addr;
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static TCGv_i64 cpu_exclusive_val;
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static TCGv_i64 cpu_exclusive_high;
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#ifdef CONFIG_USER_ONLY
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static TCGv_i64 cpu_exclusive_test;
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static TCGv_i32 cpu_exclusive_info;
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#endif
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static const char *regnames[] = { |
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"x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7", |
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"x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15", |
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"x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23", |
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"x24", "x25", "x26", "x27", "x28", "x29", "lr", "sp" |
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}; |
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enum a64_shift_type {
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A64_SHIFT_TYPE_LSL = 0,
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A64_SHIFT_TYPE_LSR = 1,
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A64_SHIFT_TYPE_ASR = 2,
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A64_SHIFT_TYPE_ROR = 3
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}; |
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/* initialize TCG globals. */
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void a64_translate_init(void) |
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{ |
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int i;
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cpu_pc = tcg_global_mem_new_i64(TCG_AREG0, |
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offsetof(CPUARMState, pc), |
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"pc");
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for (i = 0; i < 32; i++) { |
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cpu_X[i] = tcg_global_mem_new_i64(TCG_AREG0, |
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offsetof(CPUARMState, xregs[i]), |
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regnames[i]); |
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} |
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cpu_NF = tcg_global_mem_new_i32(TCG_AREG0, offsetof(CPUARMState, NF), "NF");
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cpu_ZF = tcg_global_mem_new_i32(TCG_AREG0, offsetof(CPUARMState, ZF), "ZF");
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cpu_CF = tcg_global_mem_new_i32(TCG_AREG0, offsetof(CPUARMState, CF), "CF");
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cpu_VF = tcg_global_mem_new_i32(TCG_AREG0, offsetof(CPUARMState, VF), "VF");
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cpu_exclusive_addr = tcg_global_mem_new_i64(TCG_AREG0, |
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offsetof(CPUARMState, exclusive_addr), "exclusive_addr");
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cpu_exclusive_val = tcg_global_mem_new_i64(TCG_AREG0, |
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offsetof(CPUARMState, exclusive_val), "exclusive_val");
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cpu_exclusive_high = tcg_global_mem_new_i64(TCG_AREG0, |
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offsetof(CPUARMState, exclusive_high), "exclusive_high");
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#ifdef CONFIG_USER_ONLY
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cpu_exclusive_test = tcg_global_mem_new_i64(TCG_AREG0, |
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offsetof(CPUARMState, exclusive_test), "exclusive_test");
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cpu_exclusive_info = tcg_global_mem_new_i32(TCG_AREG0, |
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offsetof(CPUARMState, exclusive_info), "exclusive_info");
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#endif
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} |
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void aarch64_cpu_dump_state(CPUState *cs, FILE *f,
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fprintf_function cpu_fprintf, int flags)
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{ |
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ARMCPU *cpu = ARM_CPU(cs); |
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CPUARMState *env = &cpu->env; |
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uint32_t psr = pstate_read(env); |
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int i;
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cpu_fprintf(f, "PC=%016"PRIx64" SP=%016"PRIx64"\n", |
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env->pc, env->xregs[31]);
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for (i = 0; i < 31; i++) { |
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cpu_fprintf(f, "X%02d=%016"PRIx64, i, env->xregs[i]);
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if ((i % 4) == 3) { |
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cpu_fprintf(f, "\n");
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} else {
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cpu_fprintf(f, " ");
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} |
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} |
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cpu_fprintf(f, "PSTATE=%08x (flags %c%c%c%c)\n",
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psr, |
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psr & PSTATE_N ? 'N' : '-', |
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psr & PSTATE_Z ? 'Z' : '-', |
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psr & PSTATE_C ? 'C' : '-', |
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psr & PSTATE_V ? 'V' : '-'); |
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cpu_fprintf(f, "\n");
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if (flags & CPU_DUMP_FPU) {
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int numvfpregs = 32; |
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for (i = 0; i < numvfpregs; i += 2) { |
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uint64_t vlo = float64_val(env->vfp.regs[i * 2]);
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uint64_t vhi = float64_val(env->vfp.regs[(i * 2) + 1]); |
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cpu_fprintf(f, "q%02d=%016" PRIx64 ":%016" PRIx64 " ", |
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i, vhi, vlo); |
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vlo = float64_val(env->vfp.regs[(i + 1) * 2]); |
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vhi = float64_val(env->vfp.regs[((i + 1) * 2) + 1]); |
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cpu_fprintf(f, "q%02d=%016" PRIx64 ":%016" PRIx64 "\n", |
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i + 1, vhi, vlo);
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} |
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cpu_fprintf(f, "FPCR: %08x FPSR: %08x\n",
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vfp_get_fpcr(env), vfp_get_fpsr(env)); |
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} |
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} |
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static int get_mem_index(DisasContext *s) |
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{ |
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#ifdef CONFIG_USER_ONLY
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return 1; |
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#else
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return s->user;
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#endif
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} |
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void gen_a64_set_pc_im(uint64_t val)
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{ |
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tcg_gen_movi_i64(cpu_pc, val); |
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} |
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static void gen_exception(int excp) |
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{ |
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TCGv_i32 tmp = tcg_temp_new_i32(); |
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tcg_gen_movi_i32(tmp, excp); |
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gen_helper_exception(cpu_env, tmp); |
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tcg_temp_free_i32(tmp); |
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} |
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static void gen_exception_insn(DisasContext *s, int offset, int excp) |
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{ |
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gen_a64_set_pc_im(s->pc - offset); |
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gen_exception(excp); |
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s->is_jmp = DISAS_EXC; |
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} |
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static inline bool use_goto_tb(DisasContext *s, int n, uint64_t dest) |
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{ |
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/* No direct tb linking with singlestep or deterministic io */
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if (s->singlestep_enabled || (s->tb->cflags & CF_LAST_IO)) {
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return false; |
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} |
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/* Only link tbs from inside the same guest page */
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if ((s->tb->pc & TARGET_PAGE_MASK) != (dest & TARGET_PAGE_MASK)) {
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return false; |
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} |
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return true; |
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} |
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static inline void gen_goto_tb(DisasContext *s, int n, uint64_t dest) |
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{ |
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TranslationBlock *tb; |
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tb = s->tb; |
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if (use_goto_tb(s, n, dest)) {
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tcg_gen_goto_tb(n); |
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gen_a64_set_pc_im(dest); |
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tcg_gen_exit_tb((tcg_target_long)tb + n); |
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s->is_jmp = DISAS_TB_JUMP; |
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} else {
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gen_a64_set_pc_im(dest); |
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if (s->singlestep_enabled) {
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gen_exception(EXCP_DEBUG); |
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} |
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tcg_gen_exit_tb(0);
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s->is_jmp = DISAS_JUMP; |
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} |
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} |
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static void unallocated_encoding(DisasContext *s) |
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{ |
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gen_exception_insn(s, 4, EXCP_UDEF);
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} |
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#define unsupported_encoding(s, insn) \
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do { \
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qemu_log_mask(LOG_UNIMP, \ |
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"%s:%d: unsupported instruction encoding 0x%08x " \
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"at pc=%016" PRIx64 "\n", \ |
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__FILE__, __LINE__, insn, s->pc - 4); \
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unallocated_encoding(s); \ |
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} while (0); |
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static void init_tmp_a64_array(DisasContext *s) |
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{ |
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#ifdef CONFIG_DEBUG_TCG
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int i;
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for (i = 0; i < ARRAY_SIZE(s->tmp_a64); i++) { |
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TCGV_UNUSED_I64(s->tmp_a64[i]); |
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} |
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#endif
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s->tmp_a64_count = 0;
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} |
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static void free_tmp_a64(DisasContext *s) |
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{ |
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int i;
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for (i = 0; i < s->tmp_a64_count; i++) { |
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tcg_temp_free_i64(s->tmp_a64[i]); |
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} |
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init_tmp_a64_array(s); |
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} |
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static TCGv_i64 new_tmp_a64(DisasContext *s)
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{ |
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assert(s->tmp_a64_count < TMP_A64_MAX); |
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return s->tmp_a64[s->tmp_a64_count++] = tcg_temp_new_i64();
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} |
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static TCGv_i64 new_tmp_a64_zero(DisasContext *s)
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{ |
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TCGv_i64 t = new_tmp_a64(s); |
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tcg_gen_movi_i64(t, 0);
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return t;
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} |
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/*
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* Register access functions
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*
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* These functions are used for directly accessing a register in where
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* changes to the final register value are likely to be made. If you
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* need to use a register for temporary calculation (e.g. index type
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* operations) use the read_* form.
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*
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* B1.2.1 Register mappings
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*
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* In instruction register encoding 31 can refer to ZR (zero register) or
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* the SP (stack pointer) depending on context. In QEMU's case we map SP
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* to cpu_X[31] and ZR accesses to a temporary which can be discarded.
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* This is the point of the _sp forms.
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*/
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static TCGv_i64 cpu_reg(DisasContext *s, int reg) |
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{ |
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if (reg == 31) { |
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return new_tmp_a64_zero(s);
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} else {
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return cpu_X[reg];
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} |
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} |
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/* register access for when 31 == SP */
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static TCGv_i64 cpu_reg_sp(DisasContext *s, int reg) |
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{ |
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return cpu_X[reg];
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} |
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/* read a cpu register in 32bit/64bit mode. Returns a TCGv_i64
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* representing the register contents. This TCGv is an auto-freed
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* temporary so it need not be explicitly freed, and may be modified.
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*/
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static TCGv_i64 read_cpu_reg(DisasContext *s, int reg, int sf) |
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{ |
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TCGv_i64 v = new_tmp_a64(s); |
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if (reg != 31) { |
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if (sf) {
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tcg_gen_mov_i64(v, cpu_X[reg]); |
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} else {
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tcg_gen_ext32u_i64(v, cpu_X[reg]); |
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} |
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} else {
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tcg_gen_movi_i64(v, 0);
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} |
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return v;
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} |
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static TCGv_i64 read_cpu_reg_sp(DisasContext *s, int reg, int sf) |
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{ |
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TCGv_i64 v = new_tmp_a64(s); |
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if (sf) {
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tcg_gen_mov_i64(v, cpu_X[reg]); |
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} else {
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tcg_gen_ext32u_i64(v, cpu_X[reg]); |
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} |
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return v;
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} |
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/* Return the offset into CPUARMState of a slice (from
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* the least significant end) of FP register Qn (ie
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* Dn, Sn, Hn or Bn).
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* (Note that this is not the same mapping as for A32; see cpu.h)
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*/
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static inline int fp_reg_offset(int regno, TCGMemOp size) |
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{ |
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int offs = offsetof(CPUARMState, vfp.regs[regno * 2]); |
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#ifdef HOST_WORDS_BIGENDIAN
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offs += (8 - (1 << size)); |
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#endif
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return offs;
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} |
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/* Offset of the high half of the 128 bit vector Qn */
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static inline int fp_reg_hi_offset(int regno) |
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{ |
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return offsetof(CPUARMState, vfp.regs[regno * 2 + 1]); |
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} |
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|
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/* Convenience accessors for reading and writing single and double
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* FP registers. Writing clears the upper parts of the associated
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* 128 bit vector register, as required by the architecture.
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* Note that unlike the GP register accessors, the values returned
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* by the read functions must be manually freed.
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*/
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static TCGv_i64 read_fp_dreg(DisasContext *s, int reg) |
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{ |
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TCGv_i64 v = tcg_temp_new_i64(); |
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tcg_gen_ld_i64(v, cpu_env, fp_reg_offset(reg, MO_64)); |
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return v;
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} |
344 |
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static TCGv_i32 read_fp_sreg(DisasContext *s, int reg) |
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{ |
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TCGv_i32 v = tcg_temp_new_i32(); |
348 |
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tcg_gen_ld_i32(v, cpu_env, fp_reg_offset(reg, MO_32)); |
350 |
return v;
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} |
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static void write_fp_dreg(DisasContext *s, int reg, TCGv_i64 v) |
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{ |
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TCGv_i64 tcg_zero = tcg_const_i64(0);
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|
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tcg_gen_st_i64(v, cpu_env, fp_reg_offset(reg, MO_64)); |
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tcg_gen_st_i64(tcg_zero, cpu_env, fp_reg_hi_offset(reg)); |
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tcg_temp_free_i64(tcg_zero); |
360 |
} |
361 |
|
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static void write_fp_sreg(DisasContext *s, int reg, TCGv_i32 v) |
363 |
{ |
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TCGv_i64 tmp = tcg_temp_new_i64(); |
365 |
|
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tcg_gen_extu_i32_i64(tmp, v); |
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write_fp_dreg(s, reg, tmp); |
368 |
tcg_temp_free_i64(tmp); |
369 |
} |
370 |
|
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static TCGv_ptr get_fpstatus_ptr(void) |
372 |
{ |
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TCGv_ptr statusptr = tcg_temp_new_ptr(); |
374 |
int offset;
|
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|
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/* In A64 all instructions (both FP and Neon) use the FPCR;
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* there is no equivalent of the A32 Neon "standard FPSCR value"
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* and all operations use vfp.fp_status.
|
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*/
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380 |
offset = offsetof(CPUARMState, vfp.fp_status); |
381 |
tcg_gen_addi_ptr(statusptr, cpu_env, offset); |
382 |
return statusptr;
|
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} |
384 |
|
385 |
/* Set ZF and NF based on a 64 bit result. This is alas fiddlier
|
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* than the 32 bit equivalent.
|
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*/
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static inline void gen_set_NZ64(TCGv_i64 result) |
389 |
{ |
390 |
TCGv_i64 flag = tcg_temp_new_i64(); |
391 |
|
392 |
tcg_gen_setcondi_i64(TCG_COND_NE, flag, result, 0);
|
393 |
tcg_gen_trunc_i64_i32(cpu_ZF, flag); |
394 |
tcg_gen_shri_i64(flag, result, 32);
|
395 |
tcg_gen_trunc_i64_i32(cpu_NF, flag); |
396 |
tcg_temp_free_i64(flag); |
397 |
} |
398 |
|
399 |
/* Set NZCV as for a logical operation: NZ as per result, CV cleared. */
|
400 |
static inline void gen_logic_CC(int sf, TCGv_i64 result) |
401 |
{ |
402 |
if (sf) {
|
403 |
gen_set_NZ64(result); |
404 |
} else {
|
405 |
tcg_gen_trunc_i64_i32(cpu_ZF, result); |
406 |
tcg_gen_trunc_i64_i32(cpu_NF, result); |
407 |
} |
408 |
tcg_gen_movi_i32(cpu_CF, 0);
|
409 |
tcg_gen_movi_i32(cpu_VF, 0);
|
410 |
} |
411 |
|
412 |
/* dest = T0 + T1; compute C, N, V and Z flags */
|
413 |
static void gen_add_CC(int sf, TCGv_i64 dest, TCGv_i64 t0, TCGv_i64 t1) |
414 |
{ |
415 |
if (sf) {
|
416 |
TCGv_i64 result, flag, tmp; |
417 |
result = tcg_temp_new_i64(); |
418 |
flag = tcg_temp_new_i64(); |
419 |
tmp = tcg_temp_new_i64(); |
420 |
|
421 |
tcg_gen_movi_i64(tmp, 0);
|
422 |
tcg_gen_add2_i64(result, flag, t0, tmp, t1, tmp); |
423 |
|
424 |
tcg_gen_trunc_i64_i32(cpu_CF, flag); |
425 |
|
426 |
gen_set_NZ64(result); |
427 |
|
428 |
tcg_gen_xor_i64(flag, result, t0); |
429 |
tcg_gen_xor_i64(tmp, t0, t1); |
430 |
tcg_gen_andc_i64(flag, flag, tmp); |
431 |
tcg_temp_free_i64(tmp); |
432 |
tcg_gen_shri_i64(flag, flag, 32);
|
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tcg_gen_trunc_i64_i32(cpu_VF, flag); |
434 |
|
435 |
tcg_gen_mov_i64(dest, result); |
436 |
tcg_temp_free_i64(result); |
437 |
tcg_temp_free_i64(flag); |
438 |
} else {
|
439 |
/* 32 bit arithmetic */
|
440 |
TCGv_i32 t0_32 = tcg_temp_new_i32(); |
441 |
TCGv_i32 t1_32 = tcg_temp_new_i32(); |
442 |
TCGv_i32 tmp = tcg_temp_new_i32(); |
443 |
|
444 |
tcg_gen_movi_i32(tmp, 0);
|
445 |
tcg_gen_trunc_i64_i32(t0_32, t0); |
446 |
tcg_gen_trunc_i64_i32(t1_32, t1); |
447 |
tcg_gen_add2_i32(cpu_NF, cpu_CF, t0_32, tmp, t1_32, tmp); |
448 |
tcg_gen_mov_i32(cpu_ZF, cpu_NF); |
449 |
tcg_gen_xor_i32(cpu_VF, cpu_NF, t0_32); |
450 |
tcg_gen_xor_i32(tmp, t0_32, t1_32); |
451 |
tcg_gen_andc_i32(cpu_VF, cpu_VF, tmp); |
452 |
tcg_gen_extu_i32_i64(dest, cpu_NF); |
453 |
|
454 |
tcg_temp_free_i32(tmp); |
455 |
tcg_temp_free_i32(t0_32); |
456 |
tcg_temp_free_i32(t1_32); |
457 |
} |
458 |
} |
459 |
|
460 |
/* dest = T0 - T1; compute C, N, V and Z flags */
|
461 |
static void gen_sub_CC(int sf, TCGv_i64 dest, TCGv_i64 t0, TCGv_i64 t1) |
462 |
{ |
463 |
if (sf) {
|
464 |
/* 64 bit arithmetic */
|
465 |
TCGv_i64 result, flag, tmp; |
466 |
|
467 |
result = tcg_temp_new_i64(); |
468 |
flag = tcg_temp_new_i64(); |
469 |
tcg_gen_sub_i64(result, t0, t1); |
470 |
|
471 |
gen_set_NZ64(result); |
472 |
|
473 |
tcg_gen_setcond_i64(TCG_COND_GEU, flag, t0, t1); |
474 |
tcg_gen_trunc_i64_i32(cpu_CF, flag); |
475 |
|
476 |
tcg_gen_xor_i64(flag, result, t0); |
477 |
tmp = tcg_temp_new_i64(); |
478 |
tcg_gen_xor_i64(tmp, t0, t1); |
479 |
tcg_gen_and_i64(flag, flag, tmp); |
480 |
tcg_temp_free_i64(tmp); |
481 |
tcg_gen_shri_i64(flag, flag, 32);
|
482 |
tcg_gen_trunc_i64_i32(cpu_VF, flag); |
483 |
tcg_gen_mov_i64(dest, result); |
484 |
tcg_temp_free_i64(flag); |
485 |
tcg_temp_free_i64(result); |
486 |
} else {
|
487 |
/* 32 bit arithmetic */
|
488 |
TCGv_i32 t0_32 = tcg_temp_new_i32(); |
489 |
TCGv_i32 t1_32 = tcg_temp_new_i32(); |
490 |
TCGv_i32 tmp; |
491 |
|
492 |
tcg_gen_trunc_i64_i32(t0_32, t0); |
493 |
tcg_gen_trunc_i64_i32(t1_32, t1); |
494 |
tcg_gen_sub_i32(cpu_NF, t0_32, t1_32); |
495 |
tcg_gen_mov_i32(cpu_ZF, cpu_NF); |
496 |
tcg_gen_setcond_i32(TCG_COND_GEU, cpu_CF, t0_32, t1_32); |
497 |
tcg_gen_xor_i32(cpu_VF, cpu_NF, t0_32); |
498 |
tmp = tcg_temp_new_i32(); |
499 |
tcg_gen_xor_i32(tmp, t0_32, t1_32); |
500 |
tcg_temp_free_i32(t0_32); |
501 |
tcg_temp_free_i32(t1_32); |
502 |
tcg_gen_and_i32(cpu_VF, cpu_VF, tmp); |
503 |
tcg_temp_free_i32(tmp); |
504 |
tcg_gen_extu_i32_i64(dest, cpu_NF); |
505 |
} |
506 |
} |
507 |
|
508 |
/* dest = T0 + T1 + CF; do not compute flags. */
|
509 |
static void gen_adc(int sf, TCGv_i64 dest, TCGv_i64 t0, TCGv_i64 t1) |
510 |
{ |
511 |
TCGv_i64 flag = tcg_temp_new_i64(); |
512 |
tcg_gen_extu_i32_i64(flag, cpu_CF); |
513 |
tcg_gen_add_i64(dest, t0, t1); |
514 |
tcg_gen_add_i64(dest, dest, flag); |
515 |
tcg_temp_free_i64(flag); |
516 |
|
517 |
if (!sf) {
|
518 |
tcg_gen_ext32u_i64(dest, dest); |
519 |
} |
520 |
} |
521 |
|
522 |
/* dest = T0 + T1 + CF; compute C, N, V and Z flags. */
|
523 |
static void gen_adc_CC(int sf, TCGv_i64 dest, TCGv_i64 t0, TCGv_i64 t1) |
524 |
{ |
525 |
if (sf) {
|
526 |
TCGv_i64 result, cf_64, vf_64, tmp; |
527 |
result = tcg_temp_new_i64(); |
528 |
cf_64 = tcg_temp_new_i64(); |
529 |
vf_64 = tcg_temp_new_i64(); |
530 |
tmp = tcg_const_i64(0);
|
531 |
|
532 |
tcg_gen_extu_i32_i64(cf_64, cpu_CF); |
533 |
tcg_gen_add2_i64(result, cf_64, t0, tmp, cf_64, tmp); |
534 |
tcg_gen_add2_i64(result, cf_64, result, cf_64, t1, tmp); |
535 |
tcg_gen_trunc_i64_i32(cpu_CF, cf_64); |
536 |
gen_set_NZ64(result); |
537 |
|
538 |
tcg_gen_xor_i64(vf_64, result, t0); |
539 |
tcg_gen_xor_i64(tmp, t0, t1); |
540 |
tcg_gen_andc_i64(vf_64, vf_64, tmp); |
541 |
tcg_gen_shri_i64(vf_64, vf_64, 32);
|
542 |
tcg_gen_trunc_i64_i32(cpu_VF, vf_64); |
543 |
|
544 |
tcg_gen_mov_i64(dest, result); |
545 |
|
546 |
tcg_temp_free_i64(tmp); |
547 |
tcg_temp_free_i64(vf_64); |
548 |
tcg_temp_free_i64(cf_64); |
549 |
tcg_temp_free_i64(result); |
550 |
} else {
|
551 |
TCGv_i32 t0_32, t1_32, tmp; |
552 |
t0_32 = tcg_temp_new_i32(); |
553 |
t1_32 = tcg_temp_new_i32(); |
554 |
tmp = tcg_const_i32(0);
|
555 |
|
556 |
tcg_gen_trunc_i64_i32(t0_32, t0); |
557 |
tcg_gen_trunc_i64_i32(t1_32, t1); |
558 |
tcg_gen_add2_i32(cpu_NF, cpu_CF, t0_32, tmp, cpu_CF, tmp); |
559 |
tcg_gen_add2_i32(cpu_NF, cpu_CF, cpu_NF, cpu_CF, t1_32, tmp); |
560 |
|
561 |
tcg_gen_mov_i32(cpu_ZF, cpu_NF); |
562 |
tcg_gen_xor_i32(cpu_VF, cpu_NF, t0_32); |
563 |
tcg_gen_xor_i32(tmp, t0_32, t1_32); |
564 |
tcg_gen_andc_i32(cpu_VF, cpu_VF, tmp); |
565 |
tcg_gen_extu_i32_i64(dest, cpu_NF); |
566 |
|
567 |
tcg_temp_free_i32(tmp); |
568 |
tcg_temp_free_i32(t1_32); |
569 |
tcg_temp_free_i32(t0_32); |
570 |
} |
571 |
} |
572 |
|
573 |
/*
|
574 |
* Load/Store generators
|
575 |
*/
|
576 |
|
577 |
/*
|
578 |
* Store from GPR register to memory
|
579 |
*/
|
580 |
static void do_gpr_st(DisasContext *s, TCGv_i64 source, |
581 |
TCGv_i64 tcg_addr, int size)
|
582 |
{ |
583 |
g_assert(size <= 3);
|
584 |
tcg_gen_qemu_st_i64(source, tcg_addr, get_mem_index(s), MO_TE + size); |
585 |
} |
586 |
|
587 |
/*
|
588 |
* Load from memory to GPR register
|
589 |
*/
|
590 |
static void do_gpr_ld(DisasContext *s, TCGv_i64 dest, TCGv_i64 tcg_addr, |
591 |
int size, bool is_signed, bool extend) |
592 |
{ |
593 |
TCGMemOp memop = MO_TE + size; |
594 |
|
595 |
g_assert(size <= 3);
|
596 |
|
597 |
if (is_signed) {
|
598 |
memop += MO_SIGN; |
599 |
} |
600 |
|
601 |
tcg_gen_qemu_ld_i64(dest, tcg_addr, get_mem_index(s), memop); |
602 |
|
603 |
if (extend && is_signed) {
|
604 |
g_assert(size < 3);
|
605 |
tcg_gen_ext32u_i64(dest, dest); |
606 |
} |
607 |
} |
608 |
|
609 |
/*
|
610 |
* Store from FP register to memory
|
611 |
*/
|
612 |
static void do_fp_st(DisasContext *s, int srcidx, TCGv_i64 tcg_addr, int size) |
613 |
{ |
614 |
/* This writes the bottom N bits of a 128 bit wide vector to memory */
|
615 |
TCGv_i64 tmp = tcg_temp_new_i64(); |
616 |
tcg_gen_ld_i64(tmp, cpu_env, fp_reg_offset(srcidx, MO_64)); |
617 |
if (size < 4) { |
618 |
tcg_gen_qemu_st_i64(tmp, tcg_addr, get_mem_index(s), MO_TE + size); |
619 |
} else {
|
620 |
TCGv_i64 tcg_hiaddr = tcg_temp_new_i64(); |
621 |
tcg_gen_qemu_st_i64(tmp, tcg_addr, get_mem_index(s), MO_TEQ); |
622 |
tcg_gen_qemu_st64(tmp, tcg_addr, get_mem_index(s)); |
623 |
tcg_gen_ld_i64(tmp, cpu_env, fp_reg_hi_offset(srcidx)); |
624 |
tcg_gen_addi_i64(tcg_hiaddr, tcg_addr, 8);
|
625 |
tcg_gen_qemu_st_i64(tmp, tcg_hiaddr, get_mem_index(s), MO_TEQ); |
626 |
tcg_temp_free_i64(tcg_hiaddr); |
627 |
} |
628 |
|
629 |
tcg_temp_free_i64(tmp); |
630 |
} |
631 |
|
632 |
/*
|
633 |
* Load from memory to FP register
|
634 |
*/
|
635 |
static void do_fp_ld(DisasContext *s, int destidx, TCGv_i64 tcg_addr, int size) |
636 |
{ |
637 |
/* This always zero-extends and writes to a full 128 bit wide vector */
|
638 |
TCGv_i64 tmplo = tcg_temp_new_i64(); |
639 |
TCGv_i64 tmphi; |
640 |
|
641 |
if (size < 4) { |
642 |
TCGMemOp memop = MO_TE + size; |
643 |
tmphi = tcg_const_i64(0);
|
644 |
tcg_gen_qemu_ld_i64(tmplo, tcg_addr, get_mem_index(s), memop); |
645 |
} else {
|
646 |
TCGv_i64 tcg_hiaddr; |
647 |
tmphi = tcg_temp_new_i64(); |
648 |
tcg_hiaddr = tcg_temp_new_i64(); |
649 |
|
650 |
tcg_gen_qemu_ld_i64(tmplo, tcg_addr, get_mem_index(s), MO_TEQ); |
651 |
tcg_gen_addi_i64(tcg_hiaddr, tcg_addr, 8);
|
652 |
tcg_gen_qemu_ld_i64(tmphi, tcg_hiaddr, get_mem_index(s), MO_TEQ); |
653 |
tcg_temp_free_i64(tcg_hiaddr); |
654 |
} |
655 |
|
656 |
tcg_gen_st_i64(tmplo, cpu_env, fp_reg_offset(destidx, MO_64)); |
657 |
tcg_gen_st_i64(tmphi, cpu_env, fp_reg_hi_offset(destidx)); |
658 |
|
659 |
tcg_temp_free_i64(tmplo); |
660 |
tcg_temp_free_i64(tmphi); |
661 |
} |
662 |
|
663 |
/*
|
664 |
* This utility function is for doing register extension with an
|
665 |
* optional shift. You will likely want to pass a temporary for the
|
666 |
* destination register. See DecodeRegExtend() in the ARM ARM.
|
667 |
*/
|
668 |
static void ext_and_shift_reg(TCGv_i64 tcg_out, TCGv_i64 tcg_in, |
669 |
int option, unsigned int shift) |
670 |
{ |
671 |
int extsize = extract32(option, 0, 2); |
672 |
bool is_signed = extract32(option, 2, 1); |
673 |
|
674 |
if (is_signed) {
|
675 |
switch (extsize) {
|
676 |
case 0: |
677 |
tcg_gen_ext8s_i64(tcg_out, tcg_in); |
678 |
break;
|
679 |
case 1: |
680 |
tcg_gen_ext16s_i64(tcg_out, tcg_in); |
681 |
break;
|
682 |
case 2: |
683 |
tcg_gen_ext32s_i64(tcg_out, tcg_in); |
684 |
break;
|
685 |
case 3: |
686 |
tcg_gen_mov_i64(tcg_out, tcg_in); |
687 |
break;
|
688 |
} |
689 |
} else {
|
690 |
switch (extsize) {
|
691 |
case 0: |
692 |
tcg_gen_ext8u_i64(tcg_out, tcg_in); |
693 |
break;
|
694 |
case 1: |
695 |
tcg_gen_ext16u_i64(tcg_out, tcg_in); |
696 |
break;
|
697 |
case 2: |
698 |
tcg_gen_ext32u_i64(tcg_out, tcg_in); |
699 |
break;
|
700 |
case 3: |
701 |
tcg_gen_mov_i64(tcg_out, tcg_in); |
702 |
break;
|
703 |
} |
704 |
} |
705 |
|
706 |
if (shift) {
|
707 |
tcg_gen_shli_i64(tcg_out, tcg_out, shift); |
708 |
} |
709 |
} |
710 |
|
711 |
static inline void gen_check_sp_alignment(DisasContext *s) |
712 |
{ |
713 |
/* The AArch64 architecture mandates that (if enabled via PSTATE
|
714 |
* or SCTLR bits) there is a check that SP is 16-aligned on every
|
715 |
* SP-relative load or store (with an exception generated if it is not).
|
716 |
* In line with general QEMU practice regarding misaligned accesses,
|
717 |
* we omit these checks for the sake of guest program performance.
|
718 |
* This function is provided as a hook so we can more easily add these
|
719 |
* checks in future (possibly as a "favour catching guest program bugs
|
720 |
* over speed" user selectable option).
|
721 |
*/
|
722 |
} |
723 |
|
724 |
/*
|
725 |
* the instruction disassembly implemented here matches
|
726 |
* the instruction encoding classifications in chapter 3 (C3)
|
727 |
* of the ARM Architecture Reference Manual (DDI0487A_a)
|
728 |
*/
|
729 |
|
730 |
/* C3.2.7 Unconditional branch (immediate)
|
731 |
* 31 30 26 25 0
|
732 |
* +----+-----------+-------------------------------------+
|
733 |
* | op | 0 0 1 0 1 | imm26 |
|
734 |
* +----+-----------+-------------------------------------+
|
735 |
*/
|
736 |
static void disas_uncond_b_imm(DisasContext *s, uint32_t insn) |
737 |
{ |
738 |
uint64_t addr = s->pc + sextract32(insn, 0, 26) * 4 - 4; |
739 |
|
740 |
if (insn & (1 << 31)) { |
741 |
/* C5.6.26 BL Branch with link */
|
742 |
tcg_gen_movi_i64(cpu_reg(s, 30), s->pc);
|
743 |
} |
744 |
|
745 |
/* C5.6.20 B Branch / C5.6.26 BL Branch with link */
|
746 |
gen_goto_tb(s, 0, addr);
|
747 |
} |
748 |
|
749 |
/* C3.2.1 Compare & branch (immediate)
|
750 |
* 31 30 25 24 23 5 4 0
|
751 |
* +----+-------------+----+---------------------+--------+
|
752 |
* | sf | 0 1 1 0 1 0 | op | imm19 | Rt |
|
753 |
* +----+-------------+----+---------------------+--------+
|
754 |
*/
|
755 |
static void disas_comp_b_imm(DisasContext *s, uint32_t insn) |
756 |
{ |
757 |
unsigned int sf, op, rt; |
758 |
uint64_t addr; |
759 |
int label_match;
|
760 |
TCGv_i64 tcg_cmp; |
761 |
|
762 |
sf = extract32(insn, 31, 1); |
763 |
op = extract32(insn, 24, 1); /* 0: CBZ; 1: CBNZ */ |
764 |
rt = extract32(insn, 0, 5); |
765 |
addr = s->pc + sextract32(insn, 5, 19) * 4 - 4; |
766 |
|
767 |
tcg_cmp = read_cpu_reg(s, rt, sf); |
768 |
label_match = gen_new_label(); |
769 |
|
770 |
tcg_gen_brcondi_i64(op ? TCG_COND_NE : TCG_COND_EQ, |
771 |
tcg_cmp, 0, label_match);
|
772 |
|
773 |
gen_goto_tb(s, 0, s->pc);
|
774 |
gen_set_label(label_match); |
775 |
gen_goto_tb(s, 1, addr);
|
776 |
} |
777 |
|
778 |
/* C3.2.5 Test & branch (immediate)
|
779 |
* 31 30 25 24 23 19 18 5 4 0
|
780 |
* +----+-------------+----+-------+-------------+------+
|
781 |
* | b5 | 0 1 1 0 1 1 | op | b40 | imm14 | Rt |
|
782 |
* +----+-------------+----+-------+-------------+------+
|
783 |
*/
|
784 |
static void disas_test_b_imm(DisasContext *s, uint32_t insn) |
785 |
{ |
786 |
unsigned int bit_pos, op, rt; |
787 |
uint64_t addr; |
788 |
int label_match;
|
789 |
TCGv_i64 tcg_cmp; |
790 |
|
791 |
bit_pos = (extract32(insn, 31, 1) << 5) | extract32(insn, 19, 5); |
792 |
op = extract32(insn, 24, 1); /* 0: TBZ; 1: TBNZ */ |
793 |
addr = s->pc + sextract32(insn, 5, 14) * 4 - 4; |
794 |
rt = extract32(insn, 0, 5); |
795 |
|
796 |
tcg_cmp = tcg_temp_new_i64(); |
797 |
tcg_gen_andi_i64(tcg_cmp, cpu_reg(s, rt), (1ULL << bit_pos));
|
798 |
label_match = gen_new_label(); |
799 |
tcg_gen_brcondi_i64(op ? TCG_COND_NE : TCG_COND_EQ, |
800 |
tcg_cmp, 0, label_match);
|
801 |
tcg_temp_free_i64(tcg_cmp); |
802 |
gen_goto_tb(s, 0, s->pc);
|
803 |
gen_set_label(label_match); |
804 |
gen_goto_tb(s, 1, addr);
|
805 |
} |
806 |
|
807 |
/* C3.2.2 / C5.6.19 Conditional branch (immediate)
|
808 |
* 31 25 24 23 5 4 3 0
|
809 |
* +---------------+----+---------------------+----+------+
|
810 |
* | 0 1 0 1 0 1 0 | o1 | imm19 | o0 | cond |
|
811 |
* +---------------+----+---------------------+----+------+
|
812 |
*/
|
813 |
static void disas_cond_b_imm(DisasContext *s, uint32_t insn) |
814 |
{ |
815 |
unsigned int cond; |
816 |
uint64_t addr; |
817 |
|
818 |
if ((insn & (1 << 4)) || (insn & (1 << 24))) { |
819 |
unallocated_encoding(s); |
820 |
return;
|
821 |
} |
822 |
addr = s->pc + sextract32(insn, 5, 19) * 4 - 4; |
823 |
cond = extract32(insn, 0, 4); |
824 |
|
825 |
if (cond < 0x0e) { |
826 |
/* genuinely conditional branches */
|
827 |
int label_match = gen_new_label();
|
828 |
arm_gen_test_cc(cond, label_match); |
829 |
gen_goto_tb(s, 0, s->pc);
|
830 |
gen_set_label(label_match); |
831 |
gen_goto_tb(s, 1, addr);
|
832 |
} else {
|
833 |
/* 0xe and 0xf are both "always" conditions */
|
834 |
gen_goto_tb(s, 0, addr);
|
835 |
} |
836 |
} |
837 |
|
838 |
/* C5.6.68 HINT */
|
839 |
static void handle_hint(DisasContext *s, uint32_t insn, |
840 |
unsigned int op1, unsigned int op2, unsigned int crm) |
841 |
{ |
842 |
unsigned int selector = crm << 3 | op2; |
843 |
|
844 |
if (op1 != 3) { |
845 |
unallocated_encoding(s); |
846 |
return;
|
847 |
} |
848 |
|
849 |
switch (selector) {
|
850 |
case 0: /* NOP */ |
851 |
return;
|
852 |
case 1: /* YIELD */ |
853 |
case 2: /* WFE */ |
854 |
case 3: /* WFI */ |
855 |
case 4: /* SEV */ |
856 |
case 5: /* SEVL */ |
857 |
/* we treat all as NOP at least for now */
|
858 |
return;
|
859 |
default:
|
860 |
/* default specified as NOP equivalent */
|
861 |
return;
|
862 |
} |
863 |
} |
864 |
|
865 |
static void gen_clrex(DisasContext *s, uint32_t insn) |
866 |
{ |
867 |
tcg_gen_movi_i64(cpu_exclusive_addr, -1);
|
868 |
} |
869 |
|
870 |
/* CLREX, DSB, DMB, ISB */
|
871 |
static void handle_sync(DisasContext *s, uint32_t insn, |
872 |
unsigned int op1, unsigned int op2, unsigned int crm) |
873 |
{ |
874 |
if (op1 != 3) { |
875 |
unallocated_encoding(s); |
876 |
return;
|
877 |
} |
878 |
|
879 |
switch (op2) {
|
880 |
case 2: /* CLREX */ |
881 |
gen_clrex(s, insn); |
882 |
return;
|
883 |
case 4: /* DSB */ |
884 |
case 5: /* DMB */ |
885 |
case 6: /* ISB */ |
886 |
/* We don't emulate caches so barriers are no-ops */
|
887 |
return;
|
888 |
default:
|
889 |
unallocated_encoding(s); |
890 |
return;
|
891 |
} |
892 |
} |
893 |
|
894 |
/* C5.6.130 MSR (immediate) - move immediate to processor state field */
|
895 |
static void handle_msr_i(DisasContext *s, uint32_t insn, |
896 |
unsigned int op1, unsigned int op2, unsigned int crm) |
897 |
{ |
898 |
unsupported_encoding(s, insn); |
899 |
} |
900 |
|
901 |
static void gen_get_nzcv(TCGv_i64 tcg_rt) |
902 |
{ |
903 |
TCGv_i32 tmp = tcg_temp_new_i32(); |
904 |
TCGv_i32 nzcv = tcg_temp_new_i32(); |
905 |
|
906 |
/* build bit 31, N */
|
907 |
tcg_gen_andi_i32(nzcv, cpu_NF, (1 << 31)); |
908 |
/* build bit 30, Z */
|
909 |
tcg_gen_setcondi_i32(TCG_COND_EQ, tmp, cpu_ZF, 0);
|
910 |
tcg_gen_deposit_i32(nzcv, nzcv, tmp, 30, 1); |
911 |
/* build bit 29, C */
|
912 |
tcg_gen_deposit_i32(nzcv, nzcv, cpu_CF, 29, 1); |
913 |
/* build bit 28, V */
|
914 |
tcg_gen_shri_i32(tmp, cpu_VF, 31);
|
915 |
tcg_gen_deposit_i32(nzcv, nzcv, tmp, 28, 1); |
916 |
/* generate result */
|
917 |
tcg_gen_extu_i32_i64(tcg_rt, nzcv); |
918 |
|
919 |
tcg_temp_free_i32(nzcv); |
920 |
tcg_temp_free_i32(tmp); |
921 |
} |
922 |
|
923 |
static void gen_set_nzcv(TCGv_i64 tcg_rt) |
924 |
|
925 |
{ |
926 |
TCGv_i32 nzcv = tcg_temp_new_i32(); |
927 |
|
928 |
/* take NZCV from R[t] */
|
929 |
tcg_gen_trunc_i64_i32(nzcv, tcg_rt); |
930 |
|
931 |
/* bit 31, N */
|
932 |
tcg_gen_andi_i32(cpu_NF, nzcv, (1 << 31)); |
933 |
/* bit 30, Z */
|
934 |
tcg_gen_andi_i32(cpu_ZF, nzcv, (1 << 30)); |
935 |
tcg_gen_setcondi_i32(TCG_COND_EQ, cpu_ZF, cpu_ZF, 0);
|
936 |
/* bit 29, C */
|
937 |
tcg_gen_andi_i32(cpu_CF, nzcv, (1 << 29)); |
938 |
tcg_gen_shri_i32(cpu_CF, cpu_CF, 29);
|
939 |
/* bit 28, V */
|
940 |
tcg_gen_andi_i32(cpu_VF, nzcv, (1 << 28)); |
941 |
tcg_gen_shli_i32(cpu_VF, cpu_VF, 3);
|
942 |
tcg_temp_free_i32(nzcv); |
943 |
} |
944 |
|
945 |
/* C5.6.129 MRS - move from system register
|
946 |
* C5.6.131 MSR (register) - move to system register
|
947 |
* C5.6.204 SYS
|
948 |
* C5.6.205 SYSL
|
949 |
* These are all essentially the same insn in 'read' and 'write'
|
950 |
* versions, with varying op0 fields.
|
951 |
*/
|
952 |
static void handle_sys(DisasContext *s, uint32_t insn, bool isread, |
953 |
unsigned int op0, unsigned int op1, unsigned int op2, |
954 |
unsigned int crn, unsigned int crm, unsigned int rt) |
955 |
{ |
956 |
const ARMCPRegInfo *ri;
|
957 |
TCGv_i64 tcg_rt; |
958 |
|
959 |
ri = get_arm_cp_reginfo(s->cp_regs, |
960 |
ENCODE_AA64_CP_REG(CP_REG_ARM64_SYSREG_CP, |
961 |
crn, crm, op0, op1, op2)); |
962 |
|
963 |
if (!ri) {
|
964 |
/* Unknown register */
|
965 |
unallocated_encoding(s); |
966 |
return;
|
967 |
} |
968 |
|
969 |
/* Check access permissions */
|
970 |
if (!cp_access_ok(s->current_pl, ri, isread)) {
|
971 |
unallocated_encoding(s); |
972 |
return;
|
973 |
} |
974 |
|
975 |
/* Handle special cases first */
|
976 |
switch (ri->type & ~(ARM_CP_FLAG_MASK & ~ARM_CP_SPECIAL)) {
|
977 |
case ARM_CP_NOP:
|
978 |
return;
|
979 |
case ARM_CP_NZCV:
|
980 |
tcg_rt = cpu_reg(s, rt); |
981 |
if (isread) {
|
982 |
gen_get_nzcv(tcg_rt); |
983 |
} else {
|
984 |
gen_set_nzcv(tcg_rt); |
985 |
} |
986 |
return;
|
987 |
default:
|
988 |
break;
|
989 |
} |
990 |
|
991 |
if (use_icount && (ri->type & ARM_CP_IO)) {
|
992 |
gen_io_start(); |
993 |
} |
994 |
|
995 |
tcg_rt = cpu_reg(s, rt); |
996 |
|
997 |
if (isread) {
|
998 |
if (ri->type & ARM_CP_CONST) {
|
999 |
tcg_gen_movi_i64(tcg_rt, ri->resetvalue); |
1000 |
} else if (ri->readfn) { |
1001 |
TCGv_ptr tmpptr; |
1002 |
gen_a64_set_pc_im(s->pc - 4);
|
1003 |
tmpptr = tcg_const_ptr(ri); |
1004 |
gen_helper_get_cp_reg64(tcg_rt, cpu_env, tmpptr); |
1005 |
tcg_temp_free_ptr(tmpptr); |
1006 |
} else {
|
1007 |
tcg_gen_ld_i64(tcg_rt, cpu_env, ri->fieldoffset); |
1008 |
} |
1009 |
} else {
|
1010 |
if (ri->type & ARM_CP_CONST) {
|
1011 |
/* If not forbidden by access permissions, treat as WI */
|
1012 |
return;
|
1013 |
} else if (ri->writefn) { |
1014 |
TCGv_ptr tmpptr; |
1015 |
gen_a64_set_pc_im(s->pc - 4);
|
1016 |
tmpptr = tcg_const_ptr(ri); |
1017 |
gen_helper_set_cp_reg64(cpu_env, tmpptr, tcg_rt); |
1018 |
tcg_temp_free_ptr(tmpptr); |
1019 |
} else {
|
1020 |
tcg_gen_st_i64(tcg_rt, cpu_env, ri->fieldoffset); |
1021 |
} |
1022 |
} |
1023 |
|
1024 |
if (use_icount && (ri->type & ARM_CP_IO)) {
|
1025 |
/* I/O operations must end the TB here (whether read or write) */
|
1026 |
gen_io_end(); |
1027 |
s->is_jmp = DISAS_UPDATE; |
1028 |
} else if (!isread && !(ri->type & ARM_CP_SUPPRESS_TB_END)) { |
1029 |
/* We default to ending the TB on a coprocessor register write,
|
1030 |
* but allow this to be suppressed by the register definition
|
1031 |
* (usually only necessary to work around guest bugs).
|
1032 |
*/
|
1033 |
s->is_jmp = DISAS_UPDATE; |
1034 |
} |
1035 |
} |
1036 |
|
1037 |
/* C3.2.4 System
|
1038 |
* 31 22 21 20 19 18 16 15 12 11 8 7 5 4 0
|
1039 |
* +---------------------+---+-----+-----+-------+-------+-----+------+
|
1040 |
* | 1 1 0 1 0 1 0 1 0 0 | L | op0 | op1 | CRn | CRm | op2 | Rt |
|
1041 |
* +---------------------+---+-----+-----+-------+-------+-----+------+
|
1042 |
*/
|
1043 |
static void disas_system(DisasContext *s, uint32_t insn) |
1044 |
{ |
1045 |
unsigned int l, op0, op1, crn, crm, op2, rt; |
1046 |
l = extract32(insn, 21, 1); |
1047 |
op0 = extract32(insn, 19, 2); |
1048 |
op1 = extract32(insn, 16, 3); |
1049 |
crn = extract32(insn, 12, 4); |
1050 |
crm = extract32(insn, 8, 4); |
1051 |
op2 = extract32(insn, 5, 3); |
1052 |
rt = extract32(insn, 0, 5); |
1053 |
|
1054 |
if (op0 == 0) { |
1055 |
if (l || rt != 31) { |
1056 |
unallocated_encoding(s); |
1057 |
return;
|
1058 |
} |
1059 |
switch (crn) {
|
1060 |
case 2: /* C5.6.68 HINT */ |
1061 |
handle_hint(s, insn, op1, op2, crm); |
1062 |
break;
|
1063 |
case 3: /* CLREX, DSB, DMB, ISB */ |
1064 |
handle_sync(s, insn, op1, op2, crm); |
1065 |
break;
|
1066 |
case 4: /* C5.6.130 MSR (immediate) */ |
1067 |
handle_msr_i(s, insn, op1, op2, crm); |
1068 |
break;
|
1069 |
default:
|
1070 |
unallocated_encoding(s); |
1071 |
break;
|
1072 |
} |
1073 |
return;
|
1074 |
} |
1075 |
handle_sys(s, insn, l, op0, op1, op2, crn, crm, rt); |
1076 |
} |
1077 |
|
1078 |
/* C3.2.3 Exception generation
|
1079 |
*
|
1080 |
* 31 24 23 21 20 5 4 2 1 0
|
1081 |
* +-----------------+-----+------------------------+-----+----+
|
1082 |
* | 1 1 0 1 0 1 0 0 | opc | imm16 | op2 | LL |
|
1083 |
* +-----------------------+------------------------+----------+
|
1084 |
*/
|
1085 |
static void disas_exc(DisasContext *s, uint32_t insn) |
1086 |
{ |
1087 |
int opc = extract32(insn, 21, 3); |
1088 |
int op2_ll = extract32(insn, 0, 5); |
1089 |
|
1090 |
switch (opc) {
|
1091 |
case 0: |
1092 |
/* SVC, HVC, SMC; since we don't support the Virtualization
|
1093 |
* or TrustZone extensions these all UNDEF except SVC.
|
1094 |
*/
|
1095 |
if (op2_ll != 1) { |
1096 |
unallocated_encoding(s); |
1097 |
break;
|
1098 |
} |
1099 |
gen_exception_insn(s, 0, EXCP_SWI);
|
1100 |
break;
|
1101 |
case 1: |
1102 |
if (op2_ll != 0) { |
1103 |
unallocated_encoding(s); |
1104 |
break;
|
1105 |
} |
1106 |
/* BRK */
|
1107 |
gen_exception_insn(s, 0, EXCP_BKPT);
|
1108 |
break;
|
1109 |
case 2: |
1110 |
if (op2_ll != 0) { |
1111 |
unallocated_encoding(s); |
1112 |
break;
|
1113 |
} |
1114 |
/* HLT */
|
1115 |
unsupported_encoding(s, insn); |
1116 |
break;
|
1117 |
case 5: |
1118 |
if (op2_ll < 1 || op2_ll > 3) { |
1119 |
unallocated_encoding(s); |
1120 |
break;
|
1121 |
} |
1122 |
/* DCPS1, DCPS2, DCPS3 */
|
1123 |
unsupported_encoding(s, insn); |
1124 |
break;
|
1125 |
default:
|
1126 |
unallocated_encoding(s); |
1127 |
break;
|
1128 |
} |
1129 |
} |
1130 |
|
1131 |
/* C3.2.7 Unconditional branch (register)
|
1132 |
* 31 25 24 21 20 16 15 10 9 5 4 0
|
1133 |
* +---------------+-------+-------+-------+------+-------+
|
1134 |
* | 1 1 0 1 0 1 1 | opc | op2 | op3 | Rn | op4 |
|
1135 |
* +---------------+-------+-------+-------+------+-------+
|
1136 |
*/
|
1137 |
static void disas_uncond_b_reg(DisasContext *s, uint32_t insn) |
1138 |
{ |
1139 |
unsigned int opc, op2, op3, rn, op4; |
1140 |
|
1141 |
opc = extract32(insn, 21, 4); |
1142 |
op2 = extract32(insn, 16, 5); |
1143 |
op3 = extract32(insn, 10, 6); |
1144 |
rn = extract32(insn, 5, 5); |
1145 |
op4 = extract32(insn, 0, 5); |
1146 |
|
1147 |
if (op4 != 0x0 || op3 != 0x0 || op2 != 0x1f) { |
1148 |
unallocated_encoding(s); |
1149 |
return;
|
1150 |
} |
1151 |
|
1152 |
switch (opc) {
|
1153 |
case 0: /* BR */ |
1154 |
case 2: /* RET */ |
1155 |
break;
|
1156 |
case 1: /* BLR */ |
1157 |
tcg_gen_movi_i64(cpu_reg(s, 30), s->pc);
|
1158 |
break;
|
1159 |
case 4: /* ERET */ |
1160 |
case 5: /* DRPS */ |
1161 |
if (rn != 0x1f) { |
1162 |
unallocated_encoding(s); |
1163 |
} else {
|
1164 |
unsupported_encoding(s, insn); |
1165 |
} |
1166 |
return;
|
1167 |
default:
|
1168 |
unallocated_encoding(s); |
1169 |
return;
|
1170 |
} |
1171 |
|
1172 |
tcg_gen_mov_i64(cpu_pc, cpu_reg(s, rn)); |
1173 |
s->is_jmp = DISAS_JUMP; |
1174 |
} |
1175 |
|
1176 |
/* C3.2 Branches, exception generating and system instructions */
|
1177 |
static void disas_b_exc_sys(DisasContext *s, uint32_t insn) |
1178 |
{ |
1179 |
switch (extract32(insn, 25, 7)) { |
1180 |
case 0x0a: case 0x0b: |
1181 |
case 0x4a: case 0x4b: /* Unconditional branch (immediate) */ |
1182 |
disas_uncond_b_imm(s, insn); |
1183 |
break;
|
1184 |
case 0x1a: case 0x5a: /* Compare & branch (immediate) */ |
1185 |
disas_comp_b_imm(s, insn); |
1186 |
break;
|
1187 |
case 0x1b: case 0x5b: /* Test & branch (immediate) */ |
1188 |
disas_test_b_imm(s, insn); |
1189 |
break;
|
1190 |
case 0x2a: /* Conditional branch (immediate) */ |
1191 |
disas_cond_b_imm(s, insn); |
1192 |
break;
|
1193 |
case 0x6a: /* Exception generation / System */ |
1194 |
if (insn & (1 << 24)) { |
1195 |
disas_system(s, insn); |
1196 |
} else {
|
1197 |
disas_exc(s, insn); |
1198 |
} |
1199 |
break;
|
1200 |
case 0x6b: /* Unconditional branch (register) */ |
1201 |
disas_uncond_b_reg(s, insn); |
1202 |
break;
|
1203 |
default:
|
1204 |
unallocated_encoding(s); |
1205 |
break;
|
1206 |
} |
1207 |
} |
1208 |
|
1209 |
/*
|
1210 |
* Load/Store exclusive instructions are implemented by remembering
|
1211 |
* the value/address loaded, and seeing if these are the same
|
1212 |
* when the store is performed. This is not actually the architecturally
|
1213 |
* mandated semantics, but it works for typical guest code sequences
|
1214 |
* and avoids having to monitor regular stores.
|
1215 |
*
|
1216 |
* In system emulation mode only one CPU will be running at once, so
|
1217 |
* this sequence is effectively atomic. In user emulation mode we
|
1218 |
* throw an exception and handle the atomic operation elsewhere.
|
1219 |
*/
|
1220 |
static void gen_load_exclusive(DisasContext *s, int rt, int rt2, |
1221 |
TCGv_i64 addr, int size, bool is_pair) |
1222 |
{ |
1223 |
TCGv_i64 tmp = tcg_temp_new_i64(); |
1224 |
TCGMemOp memop = MO_TE + size; |
1225 |
|
1226 |
g_assert(size <= 3);
|
1227 |
tcg_gen_qemu_ld_i64(tmp, addr, get_mem_index(s), memop); |
1228 |
|
1229 |
if (is_pair) {
|
1230 |
TCGv_i64 addr2 = tcg_temp_new_i64(); |
1231 |
TCGv_i64 hitmp = tcg_temp_new_i64(); |
1232 |
|
1233 |
g_assert(size >= 2);
|
1234 |
tcg_gen_addi_i64(addr2, addr, 1 << size);
|
1235 |
tcg_gen_qemu_ld_i64(hitmp, addr2, get_mem_index(s), memop); |
1236 |
tcg_temp_free_i64(addr2); |
1237 |
tcg_gen_mov_i64(cpu_exclusive_high, hitmp); |
1238 |
tcg_gen_mov_i64(cpu_reg(s, rt2), hitmp); |
1239 |
tcg_temp_free_i64(hitmp); |
1240 |
} |
1241 |
|
1242 |
tcg_gen_mov_i64(cpu_exclusive_val, tmp); |
1243 |
tcg_gen_mov_i64(cpu_reg(s, rt), tmp); |
1244 |
|
1245 |
tcg_temp_free_i64(tmp); |
1246 |
tcg_gen_mov_i64(cpu_exclusive_addr, addr); |
1247 |
} |
1248 |
|
1249 |
#ifdef CONFIG_USER_ONLY
|
1250 |
static void gen_store_exclusive(DisasContext *s, int rd, int rt, int rt2, |
1251 |
TCGv_i64 addr, int size, int is_pair) |
1252 |
{ |
1253 |
tcg_gen_mov_i64(cpu_exclusive_test, addr); |
1254 |
tcg_gen_movi_i32(cpu_exclusive_info, |
1255 |
size | is_pair << 2 | (rd << 4) | (rt << 9) | (rt2 << 14)); |
1256 |
gen_exception_insn(s, 4, EXCP_STREX);
|
1257 |
} |
1258 |
#else
|
1259 |
static void gen_store_exclusive(DisasContext *s, int rd, int rt, int rt2, |
1260 |
TCGv_i64 addr, int size, int is_pair) |
1261 |
{ |
1262 |
qemu_log_mask(LOG_UNIMP, |
1263 |
"%s:%d: system mode store_exclusive unsupported "
|
1264 |
"at pc=%016" PRIx64 "\n", |
1265 |
__FILE__, __LINE__, s->pc - 4);
|
1266 |
} |
1267 |
#endif
|
1268 |
|
1269 |
/* C3.3.6 Load/store exclusive
|
1270 |
*
|
1271 |
* 31 30 29 24 23 22 21 20 16 15 14 10 9 5 4 0
|
1272 |
* +-----+-------------+----+---+----+------+----+-------+------+------+
|
1273 |
* | sz | 0 0 1 0 0 0 | o2 | L | o1 | Rs | o0 | Rt2 | Rn | Rt |
|
1274 |
* +-----+-------------+----+---+----+------+----+-------+------+------+
|
1275 |
*
|
1276 |
* sz: 00 -> 8 bit, 01 -> 16 bit, 10 -> 32 bit, 11 -> 64 bit
|
1277 |
* L: 0 -> store, 1 -> load
|
1278 |
* o2: 0 -> exclusive, 1 -> not
|
1279 |
* o1: 0 -> single register, 1 -> register pair
|
1280 |
* o0: 1 -> load-acquire/store-release, 0 -> not
|
1281 |
*
|
1282 |
* o0 == 0 AND o2 == 1 is un-allocated
|
1283 |
* o1 == 1 is un-allocated except for 32 and 64 bit sizes
|
1284 |
*/
|
1285 |
static void disas_ldst_excl(DisasContext *s, uint32_t insn) |
1286 |
{ |
1287 |
int rt = extract32(insn, 0, 5); |
1288 |
int rn = extract32(insn, 5, 5); |
1289 |
int rt2 = extract32(insn, 10, 5); |
1290 |
int is_lasr = extract32(insn, 15, 1); |
1291 |
int rs = extract32(insn, 16, 5); |
1292 |
int is_pair = extract32(insn, 21, 1); |
1293 |
int is_store = !extract32(insn, 22, 1); |
1294 |
int is_excl = !extract32(insn, 23, 1); |
1295 |
int size = extract32(insn, 30, 2); |
1296 |
TCGv_i64 tcg_addr; |
1297 |
|
1298 |
if ((!is_excl && !is_lasr) ||
|
1299 |
(is_pair && size < 2)) {
|
1300 |
unallocated_encoding(s); |
1301 |
return;
|
1302 |
} |
1303 |
|
1304 |
if (rn == 31) { |
1305 |
gen_check_sp_alignment(s); |
1306 |
} |
1307 |
tcg_addr = read_cpu_reg_sp(s, rn, 1);
|
1308 |
|
1309 |
/* Note that since TCG is single threaded load-acquire/store-release
|
1310 |
* semantics require no extra if (is_lasr) { ... } handling.
|
1311 |
*/
|
1312 |
|
1313 |
if (is_excl) {
|
1314 |
if (!is_store) {
|
1315 |
gen_load_exclusive(s, rt, rt2, tcg_addr, size, is_pair); |
1316 |
} else {
|
1317 |
gen_store_exclusive(s, rs, rt, rt2, tcg_addr, size, is_pair); |
1318 |
} |
1319 |
} else {
|
1320 |
TCGv_i64 tcg_rt = cpu_reg(s, rt); |
1321 |
if (is_store) {
|
1322 |
do_gpr_st(s, tcg_rt, tcg_addr, size); |
1323 |
} else {
|
1324 |
do_gpr_ld(s, tcg_rt, tcg_addr, size, false, false); |
1325 |
} |
1326 |
if (is_pair) {
|
1327 |
TCGv_i64 tcg_rt2 = cpu_reg(s, rt); |
1328 |
tcg_gen_addi_i64(tcg_addr, tcg_addr, 1 << size);
|
1329 |
if (is_store) {
|
1330 |
do_gpr_st(s, tcg_rt2, tcg_addr, size); |
1331 |
} else {
|
1332 |
do_gpr_ld(s, tcg_rt2, tcg_addr, size, false, false); |
1333 |
} |
1334 |
} |
1335 |
} |
1336 |
} |
1337 |
|
1338 |
/*
|
1339 |
* C3.3.5 Load register (literal)
|
1340 |
*
|
1341 |
* 31 30 29 27 26 25 24 23 5 4 0
|
1342 |
* +-----+-------+---+-----+-------------------+-------+
|
1343 |
* | opc | 0 1 1 | V | 0 0 | imm19 | Rt |
|
1344 |
* +-----+-------+---+-----+-------------------+-------+
|
1345 |
*
|
1346 |
* V: 1 -> vector (simd/fp)
|
1347 |
* opc (non-vector): 00 -> 32 bit, 01 -> 64 bit,
|
1348 |
* 10-> 32 bit signed, 11 -> prefetch
|
1349 |
* opc (vector): 00 -> 32 bit, 01 -> 64 bit, 10 -> 128 bit (11 unallocated)
|
1350 |
*/
|
1351 |
static void disas_ld_lit(DisasContext *s, uint32_t insn) |
1352 |
{ |
1353 |
int rt = extract32(insn, 0, 5); |
1354 |
int64_t imm = sextract32(insn, 5, 19) << 2; |
1355 |
bool is_vector = extract32(insn, 26, 1); |
1356 |
int opc = extract32(insn, 30, 2); |
1357 |
bool is_signed = false; |
1358 |
int size = 2; |
1359 |
TCGv_i64 tcg_rt, tcg_addr; |
1360 |
|
1361 |
if (is_vector) {
|
1362 |
if (opc == 3) { |
1363 |
unallocated_encoding(s); |
1364 |
return;
|
1365 |
} |
1366 |
size = 2 + opc;
|
1367 |
} else {
|
1368 |
if (opc == 3) { |
1369 |
/* PRFM (literal) : prefetch */
|
1370 |
return;
|
1371 |
} |
1372 |
size = 2 + extract32(opc, 0, 1); |
1373 |
is_signed = extract32(opc, 1, 1); |
1374 |
} |
1375 |
|
1376 |
tcg_rt = cpu_reg(s, rt); |
1377 |
|
1378 |
tcg_addr = tcg_const_i64((s->pc - 4) + imm);
|
1379 |
if (is_vector) {
|
1380 |
do_fp_ld(s, rt, tcg_addr, size); |
1381 |
} else {
|
1382 |
do_gpr_ld(s, tcg_rt, tcg_addr, size, is_signed, false);
|
1383 |
} |
1384 |
tcg_temp_free_i64(tcg_addr); |
1385 |
} |
1386 |
|
1387 |
/*
|
1388 |
* C5.6.80 LDNP (Load Pair - non-temporal hint)
|
1389 |
* C5.6.81 LDP (Load Pair - non vector)
|
1390 |
* C5.6.82 LDPSW (Load Pair Signed Word - non vector)
|
1391 |
* C5.6.176 STNP (Store Pair - non-temporal hint)
|
1392 |
* C5.6.177 STP (Store Pair - non vector)
|
1393 |
* C6.3.165 LDNP (Load Pair of SIMD&FP - non-temporal hint)
|
1394 |
* C6.3.165 LDP (Load Pair of SIMD&FP)
|
1395 |
* C6.3.284 STNP (Store Pair of SIMD&FP - non-temporal hint)
|
1396 |
* C6.3.284 STP (Store Pair of SIMD&FP)
|
1397 |
*
|
1398 |
* 31 30 29 27 26 25 24 23 22 21 15 14 10 9 5 4 0
|
1399 |
* +-----+-------+---+---+-------+---+-----------------------------+
|
1400 |
* | opc | 1 0 1 | V | 0 | index | L | imm7 | Rt2 | Rn | Rt |
|
1401 |
* +-----+-------+---+---+-------+---+-------+-------+------+------+
|
1402 |
*
|
1403 |
* opc: LDP/STP/LDNP/STNP 00 -> 32 bit, 10 -> 64 bit
|
1404 |
* LDPSW 01
|
1405 |
* LDP/STP/LDNP/STNP (SIMD) 00 -> 32 bit, 01 -> 64 bit, 10 -> 128 bit
|
1406 |
* V: 0 -> GPR, 1 -> Vector
|
1407 |
* idx: 00 -> signed offset with non-temporal hint, 01 -> post-index,
|
1408 |
* 10 -> signed offset, 11 -> pre-index
|
1409 |
* L: 0 -> Store 1 -> Load
|
1410 |
*
|
1411 |
* Rt, Rt2 = GPR or SIMD registers to be stored
|
1412 |
* Rn = general purpose register containing address
|
1413 |
* imm7 = signed offset (multiple of 4 or 8 depending on size)
|
1414 |
*/
|
1415 |
static void disas_ldst_pair(DisasContext *s, uint32_t insn) |
1416 |
{ |
1417 |
int rt = extract32(insn, 0, 5); |
1418 |
int rn = extract32(insn, 5, 5); |
1419 |
int rt2 = extract32(insn, 10, 5); |
1420 |
int64_t offset = sextract32(insn, 15, 7); |
1421 |
int index = extract32(insn, 23, 2); |
1422 |
bool is_vector = extract32(insn, 26, 1); |
1423 |
bool is_load = extract32(insn, 22, 1); |
1424 |
int opc = extract32(insn, 30, 2); |
1425 |
|
1426 |
bool is_signed = false; |
1427 |
bool postindex = false; |
1428 |
bool wback = false; |
1429 |
|
1430 |
TCGv_i64 tcg_addr; /* calculated address */
|
1431 |
int size;
|
1432 |
|
1433 |
if (opc == 3) { |
1434 |
unallocated_encoding(s); |
1435 |
return;
|
1436 |
} |
1437 |
|
1438 |
if (is_vector) {
|
1439 |
size = 2 + opc;
|
1440 |
} else {
|
1441 |
size = 2 + extract32(opc, 1, 1); |
1442 |
is_signed = extract32(opc, 0, 1); |
1443 |
if (!is_load && is_signed) {
|
1444 |
unallocated_encoding(s); |
1445 |
return;
|
1446 |
} |
1447 |
} |
1448 |
|
1449 |
switch (index) {
|
1450 |
case 1: /* post-index */ |
1451 |
postindex = true;
|
1452 |
wback = true;
|
1453 |
break;
|
1454 |
case 0: |
1455 |
/* signed offset with "non-temporal" hint. Since we don't emulate
|
1456 |
* caches we don't care about hints to the cache system about
|
1457 |
* data access patterns, and handle this identically to plain
|
1458 |
* signed offset.
|
1459 |
*/
|
1460 |
if (is_signed) {
|
1461 |
/* There is no non-temporal-hint version of LDPSW */
|
1462 |
unallocated_encoding(s); |
1463 |
return;
|
1464 |
} |
1465 |
postindex = false;
|
1466 |
break;
|
1467 |
case 2: /* signed offset, rn not updated */ |
1468 |
postindex = false;
|
1469 |
break;
|
1470 |
case 3: /* pre-index */ |
1471 |
postindex = false;
|
1472 |
wback = true;
|
1473 |
break;
|
1474 |
} |
1475 |
|
1476 |
offset <<= size; |
1477 |
|
1478 |
if (rn == 31) { |
1479 |
gen_check_sp_alignment(s); |
1480 |
} |
1481 |
|
1482 |
tcg_addr = read_cpu_reg_sp(s, rn, 1);
|
1483 |
|
1484 |
if (!postindex) {
|
1485 |
tcg_gen_addi_i64(tcg_addr, tcg_addr, offset); |
1486 |
} |
1487 |
|
1488 |
if (is_vector) {
|
1489 |
if (is_load) {
|
1490 |
do_fp_ld(s, rt, tcg_addr, size); |
1491 |
} else {
|
1492 |
do_fp_st(s, rt, tcg_addr, size); |
1493 |
} |
1494 |
} else {
|
1495 |
TCGv_i64 tcg_rt = cpu_reg(s, rt); |
1496 |
if (is_load) {
|
1497 |
do_gpr_ld(s, tcg_rt, tcg_addr, size, is_signed, false);
|
1498 |
} else {
|
1499 |
do_gpr_st(s, tcg_rt, tcg_addr, size); |
1500 |
} |
1501 |
} |
1502 |
tcg_gen_addi_i64(tcg_addr, tcg_addr, 1 << size);
|
1503 |
if (is_vector) {
|
1504 |
if (is_load) {
|
1505 |
do_fp_ld(s, rt2, tcg_addr, size); |
1506 |
} else {
|
1507 |
do_fp_st(s, rt2, tcg_addr, size); |
1508 |
} |
1509 |
} else {
|
1510 |
TCGv_i64 tcg_rt2 = cpu_reg(s, rt2); |
1511 |
if (is_load) {
|
1512 |
do_gpr_ld(s, tcg_rt2, tcg_addr, size, is_signed, false);
|
1513 |
} else {
|
1514 |
do_gpr_st(s, tcg_rt2, tcg_addr, size); |
1515 |
} |
1516 |
} |
1517 |
|
1518 |
if (wback) {
|
1519 |
if (postindex) {
|
1520 |
tcg_gen_addi_i64(tcg_addr, tcg_addr, offset - (1 << size));
|
1521 |
} else {
|
1522 |
tcg_gen_subi_i64(tcg_addr, tcg_addr, 1 << size);
|
1523 |
} |
1524 |
tcg_gen_mov_i64(cpu_reg_sp(s, rn), tcg_addr); |
1525 |
} |
1526 |
} |
1527 |
|
1528 |
/*
|
1529 |
* C3.3.8 Load/store (immediate post-indexed)
|
1530 |
* C3.3.9 Load/store (immediate pre-indexed)
|
1531 |
* C3.3.12 Load/store (unscaled immediate)
|
1532 |
*
|
1533 |
* 31 30 29 27 26 25 24 23 22 21 20 12 11 10 9 5 4 0
|
1534 |
* +----+-------+---+-----+-----+---+--------+-----+------+------+
|
1535 |
* |size| 1 1 1 | V | 0 0 | opc | 0 | imm9 | idx | Rn | Rt |
|
1536 |
* +----+-------+---+-----+-----+---+--------+-----+------+------+
|
1537 |
*
|
1538 |
* idx = 01 -> post-indexed, 11 pre-indexed, 00 unscaled imm. (no writeback)
|
1539 |
* V = 0 -> non-vector
|
1540 |
* size: 00 -> 8 bit, 01 -> 16 bit, 10 -> 32 bit, 11 -> 64bit
|
1541 |
* opc: 00 -> store, 01 -> loadu, 10 -> loads 64, 11 -> loads 32
|
1542 |
*/
|
1543 |
static void disas_ldst_reg_imm9(DisasContext *s, uint32_t insn) |
1544 |
{ |
1545 |
int rt = extract32(insn, 0, 5); |
1546 |
int rn = extract32(insn, 5, 5); |
1547 |
int imm9 = sextract32(insn, 12, 9); |
1548 |
int opc = extract32(insn, 22, 2); |
1549 |
int size = extract32(insn, 30, 2); |
1550 |
int idx = extract32(insn, 10, 2); |
1551 |
bool is_signed = false; |
1552 |
bool is_store = false; |
1553 |
bool is_extended = false; |
1554 |
bool is_vector = extract32(insn, 26, 1); |
1555 |
bool post_index;
|
1556 |
bool writeback;
|
1557 |
|
1558 |
TCGv_i64 tcg_addr; |
1559 |
|
1560 |
if (is_vector) {
|
1561 |
size |= (opc & 2) << 1; |
1562 |
if (size > 4) { |
1563 |
unallocated_encoding(s); |
1564 |
return;
|
1565 |
} |
1566 |
is_store = ((opc & 1) == 0); |
1567 |
} else {
|
1568 |
if (size == 3 && opc == 2) { |
1569 |
/* PRFM - prefetch */
|
1570 |
return;
|
1571 |
} |
1572 |
if (opc == 3 && size > 1) { |
1573 |
unallocated_encoding(s); |
1574 |
return;
|
1575 |
} |
1576 |
is_store = (opc == 0);
|
1577 |
is_signed = opc & (1<<1); |
1578 |
is_extended = (size < 3) && (opc & 1); |
1579 |
} |
1580 |
|
1581 |
switch (idx) {
|
1582 |
case 0: |
1583 |
post_index = false;
|
1584 |
writeback = false;
|
1585 |
break;
|
1586 |
case 1: |
1587 |
post_index = true;
|
1588 |
writeback = true;
|
1589 |
break;
|
1590 |
case 3: |
1591 |
post_index = false;
|
1592 |
writeback = true;
|
1593 |
break;
|
1594 |
case 2: |
1595 |
g_assert(false);
|
1596 |
break;
|
1597 |
} |
1598 |
|
1599 |
if (rn == 31) { |
1600 |
gen_check_sp_alignment(s); |
1601 |
} |
1602 |
tcg_addr = read_cpu_reg_sp(s, rn, 1);
|
1603 |
|
1604 |
if (!post_index) {
|
1605 |
tcg_gen_addi_i64(tcg_addr, tcg_addr, imm9); |
1606 |
} |
1607 |
|
1608 |
if (is_vector) {
|
1609 |
if (is_store) {
|
1610 |
do_fp_st(s, rt, tcg_addr, size); |
1611 |
} else {
|
1612 |
do_fp_ld(s, rt, tcg_addr, size); |
1613 |
} |
1614 |
} else {
|
1615 |
TCGv_i64 tcg_rt = cpu_reg(s, rt); |
1616 |
if (is_store) {
|
1617 |
do_gpr_st(s, tcg_rt, tcg_addr, size); |
1618 |
} else {
|
1619 |
do_gpr_ld(s, tcg_rt, tcg_addr, size, is_signed, is_extended); |
1620 |
} |
1621 |
} |
1622 |
|
1623 |
if (writeback) {
|
1624 |
TCGv_i64 tcg_rn = cpu_reg_sp(s, rn); |
1625 |
if (post_index) {
|
1626 |
tcg_gen_addi_i64(tcg_addr, tcg_addr, imm9); |
1627 |
} |
1628 |
tcg_gen_mov_i64(tcg_rn, tcg_addr); |
1629 |
} |
1630 |
} |
1631 |
|
1632 |
/*
|
1633 |
* C3.3.10 Load/store (register offset)
|
1634 |
*
|
1635 |
* 31 30 29 27 26 25 24 23 22 21 20 16 15 13 12 11 10 9 5 4 0
|
1636 |
* +----+-------+---+-----+-----+---+------+-----+--+-----+----+----+
|
1637 |
* |size| 1 1 1 | V | 0 0 | opc | 1 | Rm | opt | S| 1 0 | Rn | Rt |
|
1638 |
* +----+-------+---+-----+-----+---+------+-----+--+-----+----+----+
|
1639 |
*
|
1640 |
* For non-vector:
|
1641 |
* size: 00-> byte, 01 -> 16 bit, 10 -> 32bit, 11 -> 64bit
|
1642 |
* opc: 00 -> store, 01 -> loadu, 10 -> loads 64, 11 -> loads 32
|
1643 |
* For vector:
|
1644 |
* size is opc<1>:size<1:0> so 100 -> 128 bit; 110 and 111 unallocated
|
1645 |
* opc<0>: 0 -> store, 1 -> load
|
1646 |
* V: 1 -> vector/simd
|
1647 |
* opt: extend encoding (see DecodeRegExtend)
|
1648 |
* S: if S=1 then scale (essentially index by sizeof(size))
|
1649 |
* Rt: register to transfer into/out of
|
1650 |
* Rn: address register or SP for base
|
1651 |
* Rm: offset register or ZR for offset
|
1652 |
*/
|
1653 |
static void disas_ldst_reg_roffset(DisasContext *s, uint32_t insn) |
1654 |
{ |
1655 |
int rt = extract32(insn, 0, 5); |
1656 |
int rn = extract32(insn, 5, 5); |
1657 |
int shift = extract32(insn, 12, 1); |
1658 |
int rm = extract32(insn, 16, 5); |
1659 |
int opc = extract32(insn, 22, 2); |
1660 |
int opt = extract32(insn, 13, 3); |
1661 |
int size = extract32(insn, 30, 2); |
1662 |
bool is_signed = false; |
1663 |
bool is_store = false; |
1664 |
bool is_extended = false; |
1665 |
bool is_vector = extract32(insn, 26, 1); |
1666 |
|
1667 |
TCGv_i64 tcg_rm; |
1668 |
TCGv_i64 tcg_addr; |
1669 |
|
1670 |
if (extract32(opt, 1, 1) == 0) { |
1671 |
unallocated_encoding(s); |
1672 |
return;
|
1673 |
} |
1674 |
|
1675 |
if (is_vector) {
|
1676 |
size |= (opc & 2) << 1; |
1677 |
if (size > 4) { |
1678 |
unallocated_encoding(s); |
1679 |
return;
|
1680 |
} |
1681 |
is_store = !extract32(opc, 0, 1); |
1682 |
} else {
|
1683 |
if (size == 3 && opc == 2) { |
1684 |
/* PRFM - prefetch */
|
1685 |
return;
|
1686 |
} |
1687 |
if (opc == 3 && size > 1) { |
1688 |
unallocated_encoding(s); |
1689 |
return;
|
1690 |
} |
1691 |
is_store = (opc == 0);
|
1692 |
is_signed = extract32(opc, 1, 1); |
1693 |
is_extended = (size < 3) && extract32(opc, 0, 1); |
1694 |
} |
1695 |
|
1696 |
if (rn == 31) { |
1697 |
gen_check_sp_alignment(s); |
1698 |
} |
1699 |
tcg_addr = read_cpu_reg_sp(s, rn, 1);
|
1700 |
|
1701 |
tcg_rm = read_cpu_reg(s, rm, 1);
|
1702 |
ext_and_shift_reg(tcg_rm, tcg_rm, opt, shift ? size : 0);
|
1703 |
|
1704 |
tcg_gen_add_i64(tcg_addr, tcg_addr, tcg_rm); |
1705 |
|
1706 |
if (is_vector) {
|
1707 |
if (is_store) {
|
1708 |
do_fp_st(s, rt, tcg_addr, size); |
1709 |
} else {
|
1710 |
do_fp_ld(s, rt, tcg_addr, size); |
1711 |
} |
1712 |
} else {
|
1713 |
TCGv_i64 tcg_rt = cpu_reg(s, rt); |
1714 |
if (is_store) {
|
1715 |
do_gpr_st(s, tcg_rt, tcg_addr, size); |
1716 |
} else {
|
1717 |
do_gpr_ld(s, tcg_rt, tcg_addr, size, is_signed, is_extended); |
1718 |
} |
1719 |
} |
1720 |
} |
1721 |
|
1722 |
/*
|
1723 |
* C3.3.13 Load/store (unsigned immediate)
|
1724 |
*
|
1725 |
* 31 30 29 27 26 25 24 23 22 21 10 9 5
|
1726 |
* +----+-------+---+-----+-----+------------+-------+------+
|
1727 |
* |size| 1 1 1 | V | 0 1 | opc | imm12 | Rn | Rt |
|
1728 |
* +----+-------+---+-----+-----+------------+-------+------+
|
1729 |
*
|
1730 |
* For non-vector:
|
1731 |
* size: 00-> byte, 01 -> 16 bit, 10 -> 32bit, 11 -> 64bit
|
1732 |
* opc: 00 -> store, 01 -> loadu, 10 -> loads 64, 11 -> loads 32
|
1733 |
* For vector:
|
1734 |
* size is opc<1>:size<1:0> so 100 -> 128 bit; 110 and 111 unallocated
|
1735 |
* opc<0>: 0 -> store, 1 -> load
|
1736 |
* Rn: base address register (inc SP)
|
1737 |
* Rt: target register
|
1738 |
*/
|
1739 |
static void disas_ldst_reg_unsigned_imm(DisasContext *s, uint32_t insn) |
1740 |
{ |
1741 |
int rt = extract32(insn, 0, 5); |
1742 |
int rn = extract32(insn, 5, 5); |
1743 |
unsigned int imm12 = extract32(insn, 10, 12); |
1744 |
bool is_vector = extract32(insn, 26, 1); |
1745 |
int size = extract32(insn, 30, 2); |
1746 |
int opc = extract32(insn, 22, 2); |
1747 |
unsigned int offset; |
1748 |
|
1749 |
TCGv_i64 tcg_addr; |
1750 |
|
1751 |
bool is_store;
|
1752 |
bool is_signed = false; |
1753 |
bool is_extended = false; |
1754 |
|
1755 |
if (is_vector) {
|
1756 |
size |= (opc & 2) << 1; |
1757 |
if (size > 4) { |
1758 |
unallocated_encoding(s); |
1759 |
return;
|
1760 |
} |
1761 |
is_store = !extract32(opc, 0, 1); |
1762 |
} else {
|
1763 |
if (size == 3 && opc == 2) { |
1764 |
/* PRFM - prefetch */
|
1765 |
return;
|
1766 |
} |
1767 |
if (opc == 3 && size > 1) { |
1768 |
unallocated_encoding(s); |
1769 |
return;
|
1770 |
} |
1771 |
is_store = (opc == 0);
|
1772 |
is_signed = extract32(opc, 1, 1); |
1773 |
is_extended = (size < 3) && extract32(opc, 0, 1); |
1774 |
} |
1775 |
|
1776 |
if (rn == 31) { |
1777 |
gen_check_sp_alignment(s); |
1778 |
} |
1779 |
tcg_addr = read_cpu_reg_sp(s, rn, 1);
|
1780 |
offset = imm12 << size; |
1781 |
tcg_gen_addi_i64(tcg_addr, tcg_addr, offset); |
1782 |
|
1783 |
if (is_vector) {
|
1784 |
if (is_store) {
|
1785 |
do_fp_st(s, rt, tcg_addr, size); |
1786 |
} else {
|
1787 |
do_fp_ld(s, rt, tcg_addr, size); |
1788 |
} |
1789 |
} else {
|
1790 |
TCGv_i64 tcg_rt = cpu_reg(s, rt); |
1791 |
if (is_store) {
|
1792 |
do_gpr_st(s, tcg_rt, tcg_addr, size); |
1793 |
} else {
|
1794 |
do_gpr_ld(s, tcg_rt, tcg_addr, size, is_signed, is_extended); |
1795 |
} |
1796 |
} |
1797 |
} |
1798 |
|
1799 |
/* Load/store register (immediate forms) */
|
1800 |
static void disas_ldst_reg_imm(DisasContext *s, uint32_t insn) |
1801 |
{ |
1802 |
switch (extract32(insn, 10, 2)) { |
1803 |
case 0: case 1: case 3: |
1804 |
/* Load/store register (unscaled immediate) */
|
1805 |
/* Load/store immediate pre/post-indexed */
|
1806 |
disas_ldst_reg_imm9(s, insn); |
1807 |
break;
|
1808 |
case 2: |
1809 |
/* Load/store register unprivileged */
|
1810 |
unsupported_encoding(s, insn); |
1811 |
break;
|
1812 |
default:
|
1813 |
unallocated_encoding(s); |
1814 |
break;
|
1815 |
} |
1816 |
} |
1817 |
|
1818 |
/* Load/store register (all forms) */
|
1819 |
static void disas_ldst_reg(DisasContext *s, uint32_t insn) |
1820 |
{ |
1821 |
switch (extract32(insn, 24, 2)) { |
1822 |
case 0: |
1823 |
if (extract32(insn, 21, 1) == 1 && extract32(insn, 10, 2) == 2) { |
1824 |
disas_ldst_reg_roffset(s, insn); |
1825 |
} else {
|
1826 |
disas_ldst_reg_imm(s, insn); |
1827 |
} |
1828 |
break;
|
1829 |
case 1: |
1830 |
disas_ldst_reg_unsigned_imm(s, insn); |
1831 |
break;
|
1832 |
default:
|
1833 |
unallocated_encoding(s); |
1834 |
break;
|
1835 |
} |
1836 |
} |
1837 |
|
1838 |
/* AdvSIMD load/store multiple structures */
|
1839 |
static void disas_ldst_multiple_struct(DisasContext *s, uint32_t insn) |
1840 |
{ |
1841 |
unsupported_encoding(s, insn); |
1842 |
} |
1843 |
|
1844 |
/* AdvSIMD load/store single structure */
|
1845 |
static void disas_ldst_single_struct(DisasContext *s, uint32_t insn) |
1846 |
{ |
1847 |
unsupported_encoding(s, insn); |
1848 |
} |
1849 |
|
1850 |
/* C3.3 Loads and stores */
|
1851 |
static void disas_ldst(DisasContext *s, uint32_t insn) |
1852 |
{ |
1853 |
switch (extract32(insn, 24, 6)) { |
1854 |
case 0x08: /* Load/store exclusive */ |
1855 |
disas_ldst_excl(s, insn); |
1856 |
break;
|
1857 |
case 0x18: case 0x1c: /* Load register (literal) */ |
1858 |
disas_ld_lit(s, insn); |
1859 |
break;
|
1860 |
case 0x28: case 0x29: |
1861 |
case 0x2c: case 0x2d: /* Load/store pair (all forms) */ |
1862 |
disas_ldst_pair(s, insn); |
1863 |
break;
|
1864 |
case 0x38: case 0x39: |
1865 |
case 0x3c: case 0x3d: /* Load/store register (all forms) */ |
1866 |
disas_ldst_reg(s, insn); |
1867 |
break;
|
1868 |
case 0x0c: /* AdvSIMD load/store multiple structures */ |
1869 |
disas_ldst_multiple_struct(s, insn); |
1870 |
break;
|
1871 |
case 0x0d: /* AdvSIMD load/store single structure */ |
1872 |
disas_ldst_single_struct(s, insn); |
1873 |
break;
|
1874 |
default:
|
1875 |
unallocated_encoding(s); |
1876 |
break;
|
1877 |
} |
1878 |
} |
1879 |
|
1880 |
/* C3.4.6 PC-rel. addressing
|
1881 |
* 31 30 29 28 24 23 5 4 0
|
1882 |
* +----+-------+-----------+-------------------+------+
|
1883 |
* | op | immlo | 1 0 0 0 0 | immhi | Rd |
|
1884 |
* +----+-------+-----------+-------------------+------+
|
1885 |
*/
|
1886 |
static void disas_pc_rel_adr(DisasContext *s, uint32_t insn) |
1887 |
{ |
1888 |
unsigned int page, rd; |
1889 |
uint64_t base; |
1890 |
int64_t offset; |
1891 |
|
1892 |
page = extract32(insn, 31, 1); |
1893 |
/* SignExtend(immhi:immlo) -> offset */
|
1894 |
offset = ((int64_t)sextract32(insn, 5, 19) << 2) | extract32(insn, 29, 2); |
1895 |
rd = extract32(insn, 0, 5); |
1896 |
base = s->pc - 4;
|
1897 |
|
1898 |
if (page) {
|
1899 |
/* ADRP (page based) */
|
1900 |
base &= ~0xfff;
|
1901 |
offset <<= 12;
|
1902 |
} |
1903 |
|
1904 |
tcg_gen_movi_i64(cpu_reg(s, rd), base + offset); |
1905 |
} |
1906 |
|
1907 |
/*
|
1908 |
* C3.4.1 Add/subtract (immediate)
|
1909 |
*
|
1910 |
* 31 30 29 28 24 23 22 21 10 9 5 4 0
|
1911 |
* +--+--+--+-----------+-----+-------------+-----+-----+
|
1912 |
* |sf|op| S| 1 0 0 0 1 |shift| imm12 | Rn | Rd |
|
1913 |
* +--+--+--+-----------+-----+-------------+-----+-----+
|
1914 |
*
|
1915 |
* sf: 0 -> 32bit, 1 -> 64bit
|
1916 |
* op: 0 -> add , 1 -> sub
|
1917 |
* S: 1 -> set flags
|
1918 |
* shift: 00 -> LSL imm by 0, 01 -> LSL imm by 12
|
1919 |
*/
|
1920 |
static void disas_add_sub_imm(DisasContext *s, uint32_t insn) |
1921 |
{ |
1922 |
int rd = extract32(insn, 0, 5); |
1923 |
int rn = extract32(insn, 5, 5); |
1924 |
uint64_t imm = extract32(insn, 10, 12); |
1925 |
int shift = extract32(insn, 22, 2); |
1926 |
bool setflags = extract32(insn, 29, 1); |
1927 |
bool sub_op = extract32(insn, 30, 1); |
1928 |
bool is_64bit = extract32(insn, 31, 1); |
1929 |
|
1930 |
TCGv_i64 tcg_rn = cpu_reg_sp(s, rn); |
1931 |
TCGv_i64 tcg_rd = setflags ? cpu_reg(s, rd) : cpu_reg_sp(s, rd); |
1932 |
TCGv_i64 tcg_result; |
1933 |
|
1934 |
switch (shift) {
|
1935 |
case 0x0: |
1936 |
break;
|
1937 |
case 0x1: |
1938 |
imm <<= 12;
|
1939 |
break;
|
1940 |
default:
|
1941 |
unallocated_encoding(s); |
1942 |
return;
|
1943 |
} |
1944 |
|
1945 |
tcg_result = tcg_temp_new_i64(); |
1946 |
if (!setflags) {
|
1947 |
if (sub_op) {
|
1948 |
tcg_gen_subi_i64(tcg_result, tcg_rn, imm); |
1949 |
} else {
|
1950 |
tcg_gen_addi_i64(tcg_result, tcg_rn, imm); |
1951 |
} |
1952 |
} else {
|
1953 |
TCGv_i64 tcg_imm = tcg_const_i64(imm); |
1954 |
if (sub_op) {
|
1955 |
gen_sub_CC(is_64bit, tcg_result, tcg_rn, tcg_imm); |
1956 |
} else {
|
1957 |
gen_add_CC(is_64bit, tcg_result, tcg_rn, tcg_imm); |
1958 |
} |
1959 |
tcg_temp_free_i64(tcg_imm); |
1960 |
} |
1961 |
|
1962 |
if (is_64bit) {
|
1963 |
tcg_gen_mov_i64(tcg_rd, tcg_result); |
1964 |
} else {
|
1965 |
tcg_gen_ext32u_i64(tcg_rd, tcg_result); |
1966 |
} |
1967 |
|
1968 |
tcg_temp_free_i64(tcg_result); |
1969 |
} |
1970 |
|
1971 |
/* The input should be a value in the bottom e bits (with higher
|
1972 |
* bits zero); returns that value replicated into every element
|
1973 |
* of size e in a 64 bit integer.
|
1974 |
*/
|
1975 |
static uint64_t bitfield_replicate(uint64_t mask, unsigned int e) |
1976 |
{ |
1977 |
assert(e != 0);
|
1978 |
while (e < 64) { |
1979 |
mask |= mask << e; |
1980 |
e *= 2;
|
1981 |
} |
1982 |
return mask;
|
1983 |
} |
1984 |
|
1985 |
/* Return a value with the bottom len bits set (where 0 < len <= 64) */
|
1986 |
static inline uint64_t bitmask64(unsigned int length) |
1987 |
{ |
1988 |
assert(length > 0 && length <= 64); |
1989 |
return ~0ULL >> (64 - length); |
1990 |
} |
1991 |
|
1992 |
/* Simplified variant of pseudocode DecodeBitMasks() for the case where we
|
1993 |
* only require the wmask. Returns false if the imms/immr/immn are a reserved
|
1994 |
* value (ie should cause a guest UNDEF exception), and true if they are
|
1995 |
* valid, in which case the decoded bit pattern is written to result.
|
1996 |
*/
|
1997 |
static bool logic_imm_decode_wmask(uint64_t *result, unsigned int immn, |
1998 |
unsigned int imms, unsigned int immr) |
1999 |
{ |
2000 |
uint64_t mask; |
2001 |
unsigned e, levels, s, r;
|
2002 |
int len;
|
2003 |
|
2004 |
assert(immn < 2 && imms < 64 && immr < 64); |
2005 |
|
2006 |
/* The bit patterns we create here are 64 bit patterns which
|
2007 |
* are vectors of identical elements of size e = 2, 4, 8, 16, 32 or
|
2008 |
* 64 bits each. Each element contains the same value: a run
|
2009 |
* of between 1 and e-1 non-zero bits, rotated within the
|
2010 |
* element by between 0 and e-1 bits.
|
2011 |
*
|
2012 |
* The element size and run length are encoded into immn (1 bit)
|
2013 |
* and imms (6 bits) as follows:
|
2014 |
* 64 bit elements: immn = 1, imms = <length of run - 1>
|
2015 |
* 32 bit elements: immn = 0, imms = 0 : <length of run - 1>
|
2016 |
* 16 bit elements: immn = 0, imms = 10 : <length of run - 1>
|
2017 |
* 8 bit elements: immn = 0, imms = 110 : <length of run - 1>
|
2018 |
* 4 bit elements: immn = 0, imms = 1110 : <length of run - 1>
|
2019 |
* 2 bit elements: immn = 0, imms = 11110 : <length of run - 1>
|
2020 |
* Notice that immn = 0, imms = 11111x is the only combination
|
2021 |
* not covered by one of the above options; this is reserved.
|
2022 |
* Further, <length of run - 1> all-ones is a reserved pattern.
|
2023 |
*
|
2024 |
* In all cases the rotation is by immr % e (and immr is 6 bits).
|
2025 |
*/
|
2026 |
|
2027 |
/* First determine the element size */
|
2028 |
len = 31 - clz32((immn << 6) | (~imms & 0x3f)); |
2029 |
if (len < 1) { |
2030 |
/* This is the immn == 0, imms == 0x11111x case */
|
2031 |
return false; |
2032 |
} |
2033 |
e = 1 << len;
|
2034 |
|
2035 |
levels = e - 1;
|
2036 |
s = imms & levels; |
2037 |
r = immr & levels; |
2038 |
|
2039 |
if (s == levels) {
|
2040 |
/* <length of run - 1> mustn't be all-ones. */
|
2041 |
return false; |
2042 |
} |
2043 |
|
2044 |
/* Create the value of one element: s+1 set bits rotated
|
2045 |
* by r within the element (which is e bits wide)...
|
2046 |
*/
|
2047 |
mask = bitmask64(s + 1);
|
2048 |
mask = (mask >> r) | (mask << (e - r)); |
2049 |
/* ...then replicate the element over the whole 64 bit value */
|
2050 |
mask = bitfield_replicate(mask, e); |
2051 |
*result = mask; |
2052 |
return true; |
2053 |
} |
2054 |
|
2055 |
/* C3.4.4 Logical (immediate)
|
2056 |
* 31 30 29 28 23 22 21 16 15 10 9 5 4 0
|
2057 |
* +----+-----+-------------+---+------+------+------+------+
|
2058 |
* | sf | opc | 1 0 0 1 0 0 | N | immr | imms | Rn | Rd |
|
2059 |
* +----+-----+-------------+---+------+------+------+------+
|
2060 |
*/
|
2061 |
static void disas_logic_imm(DisasContext *s, uint32_t insn) |
2062 |
{ |
2063 |
unsigned int sf, opc, is_n, immr, imms, rn, rd; |
2064 |
TCGv_i64 tcg_rd, tcg_rn; |
2065 |
uint64_t wmask; |
2066 |
bool is_and = false; |
2067 |
|
2068 |
sf = extract32(insn, 31, 1); |
2069 |
opc = extract32(insn, 29, 2); |
2070 |
is_n = extract32(insn, 22, 1); |
2071 |
immr = extract32(insn, 16, 6); |
2072 |
imms = extract32(insn, 10, 6); |
2073 |
rn = extract32(insn, 5, 5); |
2074 |
rd = extract32(insn, 0, 5); |
2075 |
|
2076 |
if (!sf && is_n) {
|
2077 |
unallocated_encoding(s); |
2078 |
return;
|
2079 |
} |
2080 |
|
2081 |
if (opc == 0x3) { /* ANDS */ |
2082 |
tcg_rd = cpu_reg(s, rd); |
2083 |
} else {
|
2084 |
tcg_rd = cpu_reg_sp(s, rd); |
2085 |
} |
2086 |
tcg_rn = cpu_reg(s, rn); |
2087 |
|
2088 |
if (!logic_imm_decode_wmask(&wmask, is_n, imms, immr)) {
|
2089 |
/* some immediate field values are reserved */
|
2090 |
unallocated_encoding(s); |
2091 |
return;
|
2092 |
} |
2093 |
|
2094 |
if (!sf) {
|
2095 |
wmask &= 0xffffffff;
|
2096 |
} |
2097 |
|
2098 |
switch (opc) {
|
2099 |
case 0x3: /* ANDS */ |
2100 |
case 0x0: /* AND */ |
2101 |
tcg_gen_andi_i64(tcg_rd, tcg_rn, wmask); |
2102 |
is_and = true;
|
2103 |
break;
|
2104 |
case 0x1: /* ORR */ |
2105 |
tcg_gen_ori_i64(tcg_rd, tcg_rn, wmask); |
2106 |
break;
|
2107 |
case 0x2: /* EOR */ |
2108 |
tcg_gen_xori_i64(tcg_rd, tcg_rn, wmask); |
2109 |
break;
|
2110 |
default:
|
2111 |
assert(FALSE); /* must handle all above */
|
2112 |
break;
|
2113 |
} |
2114 |
|
2115 |
if (!sf && !is_and) {
|
2116 |
/* zero extend final result; we know we can skip this for AND
|
2117 |
* since the immediate had the high 32 bits clear.
|
2118 |
*/
|
2119 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
2120 |
} |
2121 |
|
2122 |
if (opc == 3) { /* ANDS */ |
2123 |
gen_logic_CC(sf, tcg_rd); |
2124 |
} |
2125 |
} |
2126 |
|
2127 |
/*
|
2128 |
* C3.4.5 Move wide (immediate)
|
2129 |
*
|
2130 |
* 31 30 29 28 23 22 21 20 5 4 0
|
2131 |
* +--+-----+-------------+-----+----------------+------+
|
2132 |
* |sf| opc | 1 0 0 1 0 1 | hw | imm16 | Rd |
|
2133 |
* +--+-----+-------------+-----+----------------+------+
|
2134 |
*
|
2135 |
* sf: 0 -> 32 bit, 1 -> 64 bit
|
2136 |
* opc: 00 -> N, 10 -> Z, 11 -> K
|
2137 |
* hw: shift/16 (0,16, and sf only 32, 48)
|
2138 |
*/
|
2139 |
static void disas_movw_imm(DisasContext *s, uint32_t insn) |
2140 |
{ |
2141 |
int rd = extract32(insn, 0, 5); |
2142 |
uint64_t imm = extract32(insn, 5, 16); |
2143 |
int sf = extract32(insn, 31, 1); |
2144 |
int opc = extract32(insn, 29, 2); |
2145 |
int pos = extract32(insn, 21, 2) << 4; |
2146 |
TCGv_i64 tcg_rd = cpu_reg(s, rd); |
2147 |
TCGv_i64 tcg_imm; |
2148 |
|
2149 |
if (!sf && (pos >= 32)) { |
2150 |
unallocated_encoding(s); |
2151 |
return;
|
2152 |
} |
2153 |
|
2154 |
switch (opc) {
|
2155 |
case 0: /* MOVN */ |
2156 |
case 2: /* MOVZ */ |
2157 |
imm <<= pos; |
2158 |
if (opc == 0) { |
2159 |
imm = ~imm; |
2160 |
} |
2161 |
if (!sf) {
|
2162 |
imm &= 0xffffffffu;
|
2163 |
} |
2164 |
tcg_gen_movi_i64(tcg_rd, imm); |
2165 |
break;
|
2166 |
case 3: /* MOVK */ |
2167 |
tcg_imm = tcg_const_i64(imm); |
2168 |
tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_imm, pos, 16);
|
2169 |
tcg_temp_free_i64(tcg_imm); |
2170 |
if (!sf) {
|
2171 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
2172 |
} |
2173 |
break;
|
2174 |
default:
|
2175 |
unallocated_encoding(s); |
2176 |
break;
|
2177 |
} |
2178 |
} |
2179 |
|
2180 |
/* C3.4.2 Bitfield
|
2181 |
* 31 30 29 28 23 22 21 16 15 10 9 5 4 0
|
2182 |
* +----+-----+-------------+---+------+------+------+------+
|
2183 |
* | sf | opc | 1 0 0 1 1 0 | N | immr | imms | Rn | Rd |
|
2184 |
* +----+-----+-------------+---+------+------+------+------+
|
2185 |
*/
|
2186 |
static void disas_bitfield(DisasContext *s, uint32_t insn) |
2187 |
{ |
2188 |
unsigned int sf, n, opc, ri, si, rn, rd, bitsize, pos, len; |
2189 |
TCGv_i64 tcg_rd, tcg_tmp; |
2190 |
|
2191 |
sf = extract32(insn, 31, 1); |
2192 |
opc = extract32(insn, 29, 2); |
2193 |
n = extract32(insn, 22, 1); |
2194 |
ri = extract32(insn, 16, 6); |
2195 |
si = extract32(insn, 10, 6); |
2196 |
rn = extract32(insn, 5, 5); |
2197 |
rd = extract32(insn, 0, 5); |
2198 |
bitsize = sf ? 64 : 32; |
2199 |
|
2200 |
if (sf != n || ri >= bitsize || si >= bitsize || opc > 2) { |
2201 |
unallocated_encoding(s); |
2202 |
return;
|
2203 |
} |
2204 |
|
2205 |
tcg_rd = cpu_reg(s, rd); |
2206 |
tcg_tmp = read_cpu_reg(s, rn, sf); |
2207 |
|
2208 |
/* OPTME: probably worth recognizing common cases of ext{8,16,32}{u,s} */
|
2209 |
|
2210 |
if (opc != 1) { /* SBFM or UBFM */ |
2211 |
tcg_gen_movi_i64(tcg_rd, 0);
|
2212 |
} |
2213 |
|
2214 |
/* do the bit move operation */
|
2215 |
if (si >= ri) {
|
2216 |
/* Wd<s-r:0> = Wn<s:r> */
|
2217 |
tcg_gen_shri_i64(tcg_tmp, tcg_tmp, ri); |
2218 |
pos = 0;
|
2219 |
len = (si - ri) + 1;
|
2220 |
} else {
|
2221 |
/* Wd<32+s-r,32-r> = Wn<s:0> */
|
2222 |
pos = bitsize - ri; |
2223 |
len = si + 1;
|
2224 |
} |
2225 |
|
2226 |
tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_tmp, pos, len); |
2227 |
|
2228 |
if (opc == 0) { /* SBFM - sign extend the destination field */ |
2229 |
tcg_gen_shli_i64(tcg_rd, tcg_rd, 64 - (pos + len));
|
2230 |
tcg_gen_sari_i64(tcg_rd, tcg_rd, 64 - (pos + len));
|
2231 |
} |
2232 |
|
2233 |
if (!sf) { /* zero extend final result */ |
2234 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
2235 |
} |
2236 |
} |
2237 |
|
2238 |
/* C3.4.3 Extract
|
2239 |
* 31 30 29 28 23 22 21 20 16 15 10 9 5 4 0
|
2240 |
* +----+------+-------------+---+----+------+--------+------+------+
|
2241 |
* | sf | op21 | 1 0 0 1 1 1 | N | o0 | Rm | imms | Rn | Rd |
|
2242 |
* +----+------+-------------+---+----+------+--------+------+------+
|
2243 |
*/
|
2244 |
static void disas_extract(DisasContext *s, uint32_t insn) |
2245 |
{ |
2246 |
unsigned int sf, n, rm, imm, rn, rd, bitsize, op21, op0; |
2247 |
|
2248 |
sf = extract32(insn, 31, 1); |
2249 |
n = extract32(insn, 22, 1); |
2250 |
rm = extract32(insn, 16, 5); |
2251 |
imm = extract32(insn, 10, 6); |
2252 |
rn = extract32(insn, 5, 5); |
2253 |
rd = extract32(insn, 0, 5); |
2254 |
op21 = extract32(insn, 29, 2); |
2255 |
op0 = extract32(insn, 21, 1); |
2256 |
bitsize = sf ? 64 : 32; |
2257 |
|
2258 |
if (sf != n || op21 || op0 || imm >= bitsize) {
|
2259 |
unallocated_encoding(s); |
2260 |
} else {
|
2261 |
TCGv_i64 tcg_rd, tcg_rm, tcg_rn; |
2262 |
|
2263 |
tcg_rd = cpu_reg(s, rd); |
2264 |
|
2265 |
if (imm) {
|
2266 |
/* OPTME: we can special case rm==rn as a rotate */
|
2267 |
tcg_rm = read_cpu_reg(s, rm, sf); |
2268 |
tcg_rn = read_cpu_reg(s, rn, sf); |
2269 |
tcg_gen_shri_i64(tcg_rm, tcg_rm, imm); |
2270 |
tcg_gen_shli_i64(tcg_rn, tcg_rn, bitsize - imm); |
2271 |
tcg_gen_or_i64(tcg_rd, tcg_rm, tcg_rn); |
2272 |
if (!sf) {
|
2273 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
2274 |
} |
2275 |
} else {
|
2276 |
/* tcg shl_i32/shl_i64 is undefined for 32/64 bit shifts,
|
2277 |
* so an extract from bit 0 is a special case.
|
2278 |
*/
|
2279 |
if (sf) {
|
2280 |
tcg_gen_mov_i64(tcg_rd, cpu_reg(s, rm)); |
2281 |
} else {
|
2282 |
tcg_gen_ext32u_i64(tcg_rd, cpu_reg(s, rm)); |
2283 |
} |
2284 |
} |
2285 |
|
2286 |
} |
2287 |
} |
2288 |
|
2289 |
/* C3.4 Data processing - immediate */
|
2290 |
static void disas_data_proc_imm(DisasContext *s, uint32_t insn) |
2291 |
{ |
2292 |
switch (extract32(insn, 23, 6)) { |
2293 |
case 0x20: case 0x21: /* PC-rel. addressing */ |
2294 |
disas_pc_rel_adr(s, insn); |
2295 |
break;
|
2296 |
case 0x22: case 0x23: /* Add/subtract (immediate) */ |
2297 |
disas_add_sub_imm(s, insn); |
2298 |
break;
|
2299 |
case 0x24: /* Logical (immediate) */ |
2300 |
disas_logic_imm(s, insn); |
2301 |
break;
|
2302 |
case 0x25: /* Move wide (immediate) */ |
2303 |
disas_movw_imm(s, insn); |
2304 |
break;
|
2305 |
case 0x26: /* Bitfield */ |
2306 |
disas_bitfield(s, insn); |
2307 |
break;
|
2308 |
case 0x27: /* Extract */ |
2309 |
disas_extract(s, insn); |
2310 |
break;
|
2311 |
default:
|
2312 |
unallocated_encoding(s); |
2313 |
break;
|
2314 |
} |
2315 |
} |
2316 |
|
2317 |
/* Shift a TCGv src by TCGv shift_amount, put result in dst.
|
2318 |
* Note that it is the caller's responsibility to ensure that the
|
2319 |
* shift amount is in range (ie 0..31 or 0..63) and provide the ARM
|
2320 |
* mandated semantics for out of range shifts.
|
2321 |
*/
|
2322 |
static void shift_reg(TCGv_i64 dst, TCGv_i64 src, int sf, |
2323 |
enum a64_shift_type shift_type, TCGv_i64 shift_amount)
|
2324 |
{ |
2325 |
switch (shift_type) {
|
2326 |
case A64_SHIFT_TYPE_LSL:
|
2327 |
tcg_gen_shl_i64(dst, src, shift_amount); |
2328 |
break;
|
2329 |
case A64_SHIFT_TYPE_LSR:
|
2330 |
tcg_gen_shr_i64(dst, src, shift_amount); |
2331 |
break;
|
2332 |
case A64_SHIFT_TYPE_ASR:
|
2333 |
if (!sf) {
|
2334 |
tcg_gen_ext32s_i64(dst, src); |
2335 |
} |
2336 |
tcg_gen_sar_i64(dst, sf ? src : dst, shift_amount); |
2337 |
break;
|
2338 |
case A64_SHIFT_TYPE_ROR:
|
2339 |
if (sf) {
|
2340 |
tcg_gen_rotr_i64(dst, src, shift_amount); |
2341 |
} else {
|
2342 |
TCGv_i32 t0, t1; |
2343 |
t0 = tcg_temp_new_i32(); |
2344 |
t1 = tcg_temp_new_i32(); |
2345 |
tcg_gen_trunc_i64_i32(t0, src); |
2346 |
tcg_gen_trunc_i64_i32(t1, shift_amount); |
2347 |
tcg_gen_rotr_i32(t0, t0, t1); |
2348 |
tcg_gen_extu_i32_i64(dst, t0); |
2349 |
tcg_temp_free_i32(t0); |
2350 |
tcg_temp_free_i32(t1); |
2351 |
} |
2352 |
break;
|
2353 |
default:
|
2354 |
assert(FALSE); /* all shift types should be handled */
|
2355 |
break;
|
2356 |
} |
2357 |
|
2358 |
if (!sf) { /* zero extend final result */ |
2359 |
tcg_gen_ext32u_i64(dst, dst); |
2360 |
} |
2361 |
} |
2362 |
|
2363 |
/* Shift a TCGv src by immediate, put result in dst.
|
2364 |
* The shift amount must be in range (this should always be true as the
|
2365 |
* relevant instructions will UNDEF on bad shift immediates).
|
2366 |
*/
|
2367 |
static void shift_reg_imm(TCGv_i64 dst, TCGv_i64 src, int sf, |
2368 |
enum a64_shift_type shift_type, unsigned int shift_i) |
2369 |
{ |
2370 |
assert(shift_i < (sf ? 64 : 32)); |
2371 |
|
2372 |
if (shift_i == 0) { |
2373 |
tcg_gen_mov_i64(dst, src); |
2374 |
} else {
|
2375 |
TCGv_i64 shift_const; |
2376 |
|
2377 |
shift_const = tcg_const_i64(shift_i); |
2378 |
shift_reg(dst, src, sf, shift_type, shift_const); |
2379 |
tcg_temp_free_i64(shift_const); |
2380 |
} |
2381 |
} |
2382 |
|
2383 |
/* C3.5.10 Logical (shifted register)
|
2384 |
* 31 30 29 28 24 23 22 21 20 16 15 10 9 5 4 0
|
2385 |
* +----+-----+-----------+-------+---+------+--------+------+------+
|
2386 |
* | sf | opc | 0 1 0 1 0 | shift | N | Rm | imm6 | Rn | Rd |
|
2387 |
* +----+-----+-----------+-------+---+------+--------+------+------+
|
2388 |
*/
|
2389 |
static void disas_logic_reg(DisasContext *s, uint32_t insn) |
2390 |
{ |
2391 |
TCGv_i64 tcg_rd, tcg_rn, tcg_rm; |
2392 |
unsigned int sf, opc, shift_type, invert, rm, shift_amount, rn, rd; |
2393 |
|
2394 |
sf = extract32(insn, 31, 1); |
2395 |
opc = extract32(insn, 29, 2); |
2396 |
shift_type = extract32(insn, 22, 2); |
2397 |
invert = extract32(insn, 21, 1); |
2398 |
rm = extract32(insn, 16, 5); |
2399 |
shift_amount = extract32(insn, 10, 6); |
2400 |
rn = extract32(insn, 5, 5); |
2401 |
rd = extract32(insn, 0, 5); |
2402 |
|
2403 |
if (!sf && (shift_amount & (1 << 5))) { |
2404 |
unallocated_encoding(s); |
2405 |
return;
|
2406 |
} |
2407 |
|
2408 |
tcg_rd = cpu_reg(s, rd); |
2409 |
|
2410 |
if (opc == 1 && shift_amount == 0 && shift_type == 0 && rn == 31) { |
2411 |
/* Unshifted ORR and ORN with WZR/XZR is the standard encoding for
|
2412 |
* register-register MOV and MVN, so it is worth special casing.
|
2413 |
*/
|
2414 |
tcg_rm = cpu_reg(s, rm); |
2415 |
if (invert) {
|
2416 |
tcg_gen_not_i64(tcg_rd, tcg_rm); |
2417 |
if (!sf) {
|
2418 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
2419 |
} |
2420 |
} else {
|
2421 |
if (sf) {
|
2422 |
tcg_gen_mov_i64(tcg_rd, tcg_rm); |
2423 |
} else {
|
2424 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rm); |
2425 |
} |
2426 |
} |
2427 |
return;
|
2428 |
} |
2429 |
|
2430 |
tcg_rm = read_cpu_reg(s, rm, sf); |
2431 |
|
2432 |
if (shift_amount) {
|
2433 |
shift_reg_imm(tcg_rm, tcg_rm, sf, shift_type, shift_amount); |
2434 |
} |
2435 |
|
2436 |
tcg_rn = cpu_reg(s, rn); |
2437 |
|
2438 |
switch (opc | (invert << 2)) { |
2439 |
case 0: /* AND */ |
2440 |
case 3: /* ANDS */ |
2441 |
tcg_gen_and_i64(tcg_rd, tcg_rn, tcg_rm); |
2442 |
break;
|
2443 |
case 1: /* ORR */ |
2444 |
tcg_gen_or_i64(tcg_rd, tcg_rn, tcg_rm); |
2445 |
break;
|
2446 |
case 2: /* EOR */ |
2447 |
tcg_gen_xor_i64(tcg_rd, tcg_rn, tcg_rm); |
2448 |
break;
|
2449 |
case 4: /* BIC */ |
2450 |
case 7: /* BICS */ |
2451 |
tcg_gen_andc_i64(tcg_rd, tcg_rn, tcg_rm); |
2452 |
break;
|
2453 |
case 5: /* ORN */ |
2454 |
tcg_gen_orc_i64(tcg_rd, tcg_rn, tcg_rm); |
2455 |
break;
|
2456 |
case 6: /* EON */ |
2457 |
tcg_gen_eqv_i64(tcg_rd, tcg_rn, tcg_rm); |
2458 |
break;
|
2459 |
default:
|
2460 |
assert(FALSE); |
2461 |
break;
|
2462 |
} |
2463 |
|
2464 |
if (!sf) {
|
2465 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
2466 |
} |
2467 |
|
2468 |
if (opc == 3) { |
2469 |
gen_logic_CC(sf, tcg_rd); |
2470 |
} |
2471 |
} |
2472 |
|
2473 |
/*
|
2474 |
* C3.5.1 Add/subtract (extended register)
|
2475 |
*
|
2476 |
* 31|30|29|28 24|23 22|21|20 16|15 13|12 10|9 5|4 0|
|
2477 |
* +--+--+--+-----------+-----+--+-------+------+------+----+----+
|
2478 |
* |sf|op| S| 0 1 0 1 1 | opt | 1| Rm |option| imm3 | Rn | Rd |
|
2479 |
* +--+--+--+-----------+-----+--+-------+------+------+----+----+
|
2480 |
*
|
2481 |
* sf: 0 -> 32bit, 1 -> 64bit
|
2482 |
* op: 0 -> add , 1 -> sub
|
2483 |
* S: 1 -> set flags
|
2484 |
* opt: 00
|
2485 |
* option: extension type (see DecodeRegExtend)
|
2486 |
* imm3: optional shift to Rm
|
2487 |
*
|
2488 |
* Rd = Rn + LSL(extend(Rm), amount)
|
2489 |
*/
|
2490 |
static void disas_add_sub_ext_reg(DisasContext *s, uint32_t insn) |
2491 |
{ |
2492 |
int rd = extract32(insn, 0, 5); |
2493 |
int rn = extract32(insn, 5, 5); |
2494 |
int imm3 = extract32(insn, 10, 3); |
2495 |
int option = extract32(insn, 13, 3); |
2496 |
int rm = extract32(insn, 16, 5); |
2497 |
bool setflags = extract32(insn, 29, 1); |
2498 |
bool sub_op = extract32(insn, 30, 1); |
2499 |
bool sf = extract32(insn, 31, 1); |
2500 |
|
2501 |
TCGv_i64 tcg_rm, tcg_rn; /* temps */
|
2502 |
TCGv_i64 tcg_rd; |
2503 |
TCGv_i64 tcg_result; |
2504 |
|
2505 |
if (imm3 > 4) { |
2506 |
unallocated_encoding(s); |
2507 |
return;
|
2508 |
} |
2509 |
|
2510 |
/* non-flag setting ops may use SP */
|
2511 |
if (!setflags) {
|
2512 |
tcg_rn = read_cpu_reg_sp(s, rn, sf); |
2513 |
tcg_rd = cpu_reg_sp(s, rd); |
2514 |
} else {
|
2515 |
tcg_rn = read_cpu_reg(s, rn, sf); |
2516 |
tcg_rd = cpu_reg(s, rd); |
2517 |
} |
2518 |
|
2519 |
tcg_rm = read_cpu_reg(s, rm, sf); |
2520 |
ext_and_shift_reg(tcg_rm, tcg_rm, option, imm3); |
2521 |
|
2522 |
tcg_result = tcg_temp_new_i64(); |
2523 |
|
2524 |
if (!setflags) {
|
2525 |
if (sub_op) {
|
2526 |
tcg_gen_sub_i64(tcg_result, tcg_rn, tcg_rm); |
2527 |
} else {
|
2528 |
tcg_gen_add_i64(tcg_result, tcg_rn, tcg_rm); |
2529 |
} |
2530 |
} else {
|
2531 |
if (sub_op) {
|
2532 |
gen_sub_CC(sf, tcg_result, tcg_rn, tcg_rm); |
2533 |
} else {
|
2534 |
gen_add_CC(sf, tcg_result, tcg_rn, tcg_rm); |
2535 |
} |
2536 |
} |
2537 |
|
2538 |
if (sf) {
|
2539 |
tcg_gen_mov_i64(tcg_rd, tcg_result); |
2540 |
} else {
|
2541 |
tcg_gen_ext32u_i64(tcg_rd, tcg_result); |
2542 |
} |
2543 |
|
2544 |
tcg_temp_free_i64(tcg_result); |
2545 |
} |
2546 |
|
2547 |
/*
|
2548 |
* C3.5.2 Add/subtract (shifted register)
|
2549 |
*
|
2550 |
* 31 30 29 28 24 23 22 21 20 16 15 10 9 5 4 0
|
2551 |
* +--+--+--+-----------+-----+--+-------+---------+------+------+
|
2552 |
* |sf|op| S| 0 1 0 1 1 |shift| 0| Rm | imm6 | Rn | Rd |
|
2553 |
* +--+--+--+-----------+-----+--+-------+---------+------+------+
|
2554 |
*
|
2555 |
* sf: 0 -> 32bit, 1 -> 64bit
|
2556 |
* op: 0 -> add , 1 -> sub
|
2557 |
* S: 1 -> set flags
|
2558 |
* shift: 00 -> LSL, 01 -> LSR, 10 -> ASR, 11 -> RESERVED
|
2559 |
* imm6: Shift amount to apply to Rm before the add/sub
|
2560 |
*/
|
2561 |
static void disas_add_sub_reg(DisasContext *s, uint32_t insn) |
2562 |
{ |
2563 |
int rd = extract32(insn, 0, 5); |
2564 |
int rn = extract32(insn, 5, 5); |
2565 |
int imm6 = extract32(insn, 10, 6); |
2566 |
int rm = extract32(insn, 16, 5); |
2567 |
int shift_type = extract32(insn, 22, 2); |
2568 |
bool setflags = extract32(insn, 29, 1); |
2569 |
bool sub_op = extract32(insn, 30, 1); |
2570 |
bool sf = extract32(insn, 31, 1); |
2571 |
|
2572 |
TCGv_i64 tcg_rd = cpu_reg(s, rd); |
2573 |
TCGv_i64 tcg_rn, tcg_rm; |
2574 |
TCGv_i64 tcg_result; |
2575 |
|
2576 |
if ((shift_type == 3) || (!sf && (imm6 > 31))) { |
2577 |
unallocated_encoding(s); |
2578 |
return;
|
2579 |
} |
2580 |
|
2581 |
tcg_rn = read_cpu_reg(s, rn, sf); |
2582 |
tcg_rm = read_cpu_reg(s, rm, sf); |
2583 |
|
2584 |
shift_reg_imm(tcg_rm, tcg_rm, sf, shift_type, imm6); |
2585 |
|
2586 |
tcg_result = tcg_temp_new_i64(); |
2587 |
|
2588 |
if (!setflags) {
|
2589 |
if (sub_op) {
|
2590 |
tcg_gen_sub_i64(tcg_result, tcg_rn, tcg_rm); |
2591 |
} else {
|
2592 |
tcg_gen_add_i64(tcg_result, tcg_rn, tcg_rm); |
2593 |
} |
2594 |
} else {
|
2595 |
if (sub_op) {
|
2596 |
gen_sub_CC(sf, tcg_result, tcg_rn, tcg_rm); |
2597 |
} else {
|
2598 |
gen_add_CC(sf, tcg_result, tcg_rn, tcg_rm); |
2599 |
} |
2600 |
} |
2601 |
|
2602 |
if (sf) {
|
2603 |
tcg_gen_mov_i64(tcg_rd, tcg_result); |
2604 |
} else {
|
2605 |
tcg_gen_ext32u_i64(tcg_rd, tcg_result); |
2606 |
} |
2607 |
|
2608 |
tcg_temp_free_i64(tcg_result); |
2609 |
} |
2610 |
|
2611 |
/* C3.5.9 Data-processing (3 source)
|
2612 |
|
2613 |
31 30 29 28 24 23 21 20 16 15 14 10 9 5 4 0
|
2614 |
+--+------+-----------+------+------+----+------+------+------+
|
2615 |
|sf| op54 | 1 1 0 1 1 | op31 | Rm | o0 | Ra | Rn | Rd |
|
2616 |
+--+------+-----------+------+------+----+------+------+------+
|
2617 |
|
2618 |
*/
|
2619 |
static void disas_data_proc_3src(DisasContext *s, uint32_t insn) |
2620 |
{ |
2621 |
int rd = extract32(insn, 0, 5); |
2622 |
int rn = extract32(insn, 5, 5); |
2623 |
int ra = extract32(insn, 10, 5); |
2624 |
int rm = extract32(insn, 16, 5); |
2625 |
int op_id = (extract32(insn, 29, 3) << 4) | |
2626 |
(extract32(insn, 21, 3) << 1) | |
2627 |
extract32(insn, 15, 1); |
2628 |
bool sf = extract32(insn, 31, 1); |
2629 |
bool is_sub = extract32(op_id, 0, 1); |
2630 |
bool is_high = extract32(op_id, 2, 1); |
2631 |
bool is_signed = false; |
2632 |
TCGv_i64 tcg_op1; |
2633 |
TCGv_i64 tcg_op2; |
2634 |
TCGv_i64 tcg_tmp; |
2635 |
|
2636 |
/* Note that op_id is sf:op54:op31:o0 so it includes the 32/64 size flag */
|
2637 |
switch (op_id) {
|
2638 |
case 0x42: /* SMADDL */ |
2639 |
case 0x43: /* SMSUBL */ |
2640 |
case 0x44: /* SMULH */ |
2641 |
is_signed = true;
|
2642 |
break;
|
2643 |
case 0x0: /* MADD (32bit) */ |
2644 |
case 0x1: /* MSUB (32bit) */ |
2645 |
case 0x40: /* MADD (64bit) */ |
2646 |
case 0x41: /* MSUB (64bit) */ |
2647 |
case 0x4a: /* UMADDL */ |
2648 |
case 0x4b: /* UMSUBL */ |
2649 |
case 0x4c: /* UMULH */ |
2650 |
break;
|
2651 |
default:
|
2652 |
unallocated_encoding(s); |
2653 |
return;
|
2654 |
} |
2655 |
|
2656 |
if (is_high) {
|
2657 |
TCGv_i64 low_bits = tcg_temp_new_i64(); /* low bits discarded */
|
2658 |
TCGv_i64 tcg_rd = cpu_reg(s, rd); |
2659 |
TCGv_i64 tcg_rn = cpu_reg(s, rn); |
2660 |
TCGv_i64 tcg_rm = cpu_reg(s, rm); |
2661 |
|
2662 |
if (is_signed) {
|
2663 |
tcg_gen_muls2_i64(low_bits, tcg_rd, tcg_rn, tcg_rm); |
2664 |
} else {
|
2665 |
tcg_gen_mulu2_i64(low_bits, tcg_rd, tcg_rn, tcg_rm); |
2666 |
} |
2667 |
|
2668 |
tcg_temp_free_i64(low_bits); |
2669 |
return;
|
2670 |
} |
2671 |
|
2672 |
tcg_op1 = tcg_temp_new_i64(); |
2673 |
tcg_op2 = tcg_temp_new_i64(); |
2674 |
tcg_tmp = tcg_temp_new_i64(); |
2675 |
|
2676 |
if (op_id < 0x42) { |
2677 |
tcg_gen_mov_i64(tcg_op1, cpu_reg(s, rn)); |
2678 |
tcg_gen_mov_i64(tcg_op2, cpu_reg(s, rm)); |
2679 |
} else {
|
2680 |
if (is_signed) {
|
2681 |
tcg_gen_ext32s_i64(tcg_op1, cpu_reg(s, rn)); |
2682 |
tcg_gen_ext32s_i64(tcg_op2, cpu_reg(s, rm)); |
2683 |
} else {
|
2684 |
tcg_gen_ext32u_i64(tcg_op1, cpu_reg(s, rn)); |
2685 |
tcg_gen_ext32u_i64(tcg_op2, cpu_reg(s, rm)); |
2686 |
} |
2687 |
} |
2688 |
|
2689 |
if (ra == 31 && !is_sub) { |
2690 |
/* Special-case MADD with rA == XZR; it is the standard MUL alias */
|
2691 |
tcg_gen_mul_i64(cpu_reg(s, rd), tcg_op1, tcg_op2); |
2692 |
} else {
|
2693 |
tcg_gen_mul_i64(tcg_tmp, tcg_op1, tcg_op2); |
2694 |
if (is_sub) {
|
2695 |
tcg_gen_sub_i64(cpu_reg(s, rd), cpu_reg(s, ra), tcg_tmp); |
2696 |
} else {
|
2697 |
tcg_gen_add_i64(cpu_reg(s, rd), cpu_reg(s, ra), tcg_tmp); |
2698 |
} |
2699 |
} |
2700 |
|
2701 |
if (!sf) {
|
2702 |
tcg_gen_ext32u_i64(cpu_reg(s, rd), cpu_reg(s, rd)); |
2703 |
} |
2704 |
|
2705 |
tcg_temp_free_i64(tcg_op1); |
2706 |
tcg_temp_free_i64(tcg_op2); |
2707 |
tcg_temp_free_i64(tcg_tmp); |
2708 |
} |
2709 |
|
2710 |
/* C3.5.3 - Add/subtract (with carry)
|
2711 |
* 31 30 29 28 27 26 25 24 23 22 21 20 16 15 10 9 5 4 0
|
2712 |
* +--+--+--+------------------------+------+---------+------+-----+
|
2713 |
* |sf|op| S| 1 1 0 1 0 0 0 0 | rm | opcode2 | Rn | Rd |
|
2714 |
* +--+--+--+------------------------+------+---------+------+-----+
|
2715 |
* [000000]
|
2716 |
*/
|
2717 |
|
2718 |
static void disas_adc_sbc(DisasContext *s, uint32_t insn) |
2719 |
{ |
2720 |
unsigned int sf, op, setflags, rm, rn, rd; |
2721 |
TCGv_i64 tcg_y, tcg_rn, tcg_rd; |
2722 |
|
2723 |
if (extract32(insn, 10, 6) != 0) { |
2724 |
unallocated_encoding(s); |
2725 |
return;
|
2726 |
} |
2727 |
|
2728 |
sf = extract32(insn, 31, 1); |
2729 |
op = extract32(insn, 30, 1); |
2730 |
setflags = extract32(insn, 29, 1); |
2731 |
rm = extract32(insn, 16, 5); |
2732 |
rn = extract32(insn, 5, 5); |
2733 |
rd = extract32(insn, 0, 5); |
2734 |
|
2735 |
tcg_rd = cpu_reg(s, rd); |
2736 |
tcg_rn = cpu_reg(s, rn); |
2737 |
|
2738 |
if (op) {
|
2739 |
tcg_y = new_tmp_a64(s); |
2740 |
tcg_gen_not_i64(tcg_y, cpu_reg(s, rm)); |
2741 |
} else {
|
2742 |
tcg_y = cpu_reg(s, rm); |
2743 |
} |
2744 |
|
2745 |
if (setflags) {
|
2746 |
gen_adc_CC(sf, tcg_rd, tcg_rn, tcg_y); |
2747 |
} else {
|
2748 |
gen_adc(sf, tcg_rd, tcg_rn, tcg_y); |
2749 |
} |
2750 |
} |
2751 |
|
2752 |
/* C3.5.4 - C3.5.5 Conditional compare (immediate / register)
|
2753 |
* 31 30 29 28 27 26 25 24 23 22 21 20 16 15 12 11 10 9 5 4 3 0
|
2754 |
* +--+--+--+------------------------+--------+------+----+--+------+--+-----+
|
2755 |
* |sf|op| S| 1 1 0 1 0 0 1 0 |imm5/rm | cond |i/r |o2| Rn |o3|nzcv |
|
2756 |
* +--+--+--+------------------------+--------+------+----+--+------+--+-----+
|
2757 |
* [1] y [0] [0]
|
2758 |
*/
|
2759 |
static void disas_cc(DisasContext *s, uint32_t insn) |
2760 |
{ |
2761 |
unsigned int sf, op, y, cond, rn, nzcv, is_imm; |
2762 |
int label_continue = -1; |
2763 |
TCGv_i64 tcg_tmp, tcg_y, tcg_rn; |
2764 |
|
2765 |
if (!extract32(insn, 29, 1)) { |
2766 |
unallocated_encoding(s); |
2767 |
return;
|
2768 |
} |
2769 |
if (insn & (1 << 10 | 1 << 4)) { |
2770 |
unallocated_encoding(s); |
2771 |
return;
|
2772 |
} |
2773 |
sf = extract32(insn, 31, 1); |
2774 |
op = extract32(insn, 30, 1); |
2775 |
is_imm = extract32(insn, 11, 1); |
2776 |
y = extract32(insn, 16, 5); /* y = rm (reg) or imm5 (imm) */ |
2777 |
cond = extract32(insn, 12, 4); |
2778 |
rn = extract32(insn, 5, 5); |
2779 |
nzcv = extract32(insn, 0, 4); |
2780 |
|
2781 |
if (cond < 0x0e) { /* not always */ |
2782 |
int label_match = gen_new_label();
|
2783 |
label_continue = gen_new_label(); |
2784 |
arm_gen_test_cc(cond, label_match); |
2785 |
/* nomatch: */
|
2786 |
tcg_tmp = tcg_temp_new_i64(); |
2787 |
tcg_gen_movi_i64(tcg_tmp, nzcv << 28);
|
2788 |
gen_set_nzcv(tcg_tmp); |
2789 |
tcg_temp_free_i64(tcg_tmp); |
2790 |
tcg_gen_br(label_continue); |
2791 |
gen_set_label(label_match); |
2792 |
} |
2793 |
/* match, or condition is always */
|
2794 |
if (is_imm) {
|
2795 |
tcg_y = new_tmp_a64(s); |
2796 |
tcg_gen_movi_i64(tcg_y, y); |
2797 |
} else {
|
2798 |
tcg_y = cpu_reg(s, y); |
2799 |
} |
2800 |
tcg_rn = cpu_reg(s, rn); |
2801 |
|
2802 |
tcg_tmp = tcg_temp_new_i64(); |
2803 |
if (op) {
|
2804 |
gen_sub_CC(sf, tcg_tmp, tcg_rn, tcg_y); |
2805 |
} else {
|
2806 |
gen_add_CC(sf, tcg_tmp, tcg_rn, tcg_y); |
2807 |
} |
2808 |
tcg_temp_free_i64(tcg_tmp); |
2809 |
|
2810 |
if (cond < 0x0e) { /* continue */ |
2811 |
gen_set_label(label_continue); |
2812 |
} |
2813 |
} |
2814 |
|
2815 |
/* C3.5.6 Conditional select
|
2816 |
* 31 30 29 28 21 20 16 15 12 11 10 9 5 4 0
|
2817 |
* +----+----+---+-----------------+------+------+-----+------+------+
|
2818 |
* | sf | op | S | 1 1 0 1 0 1 0 0 | Rm | cond | op2 | Rn | Rd |
|
2819 |
* +----+----+---+-----------------+------+------+-----+------+------+
|
2820 |
*/
|
2821 |
static void disas_cond_select(DisasContext *s, uint32_t insn) |
2822 |
{ |
2823 |
unsigned int sf, else_inv, rm, cond, else_inc, rn, rd; |
2824 |
TCGv_i64 tcg_rd, tcg_src; |
2825 |
|
2826 |
if (extract32(insn, 29, 1) || extract32(insn, 11, 1)) { |
2827 |
/* S == 1 or op2<1> == 1 */
|
2828 |
unallocated_encoding(s); |
2829 |
return;
|
2830 |
} |
2831 |
sf = extract32(insn, 31, 1); |
2832 |
else_inv = extract32(insn, 30, 1); |
2833 |
rm = extract32(insn, 16, 5); |
2834 |
cond = extract32(insn, 12, 4); |
2835 |
else_inc = extract32(insn, 10, 1); |
2836 |
rn = extract32(insn, 5, 5); |
2837 |
rd = extract32(insn, 0, 5); |
2838 |
|
2839 |
if (rd == 31) { |
2840 |
/* silly no-op write; until we use movcond we must special-case
|
2841 |
* this to avoid a dead temporary across basic blocks.
|
2842 |
*/
|
2843 |
return;
|
2844 |
} |
2845 |
|
2846 |
tcg_rd = cpu_reg(s, rd); |
2847 |
|
2848 |
if (cond >= 0x0e) { /* condition "always" */ |
2849 |
tcg_src = read_cpu_reg(s, rn, sf); |
2850 |
tcg_gen_mov_i64(tcg_rd, tcg_src); |
2851 |
} else {
|
2852 |
/* OPTME: we could use movcond here, at the cost of duplicating
|
2853 |
* a lot of the arm_gen_test_cc() logic.
|
2854 |
*/
|
2855 |
int label_match = gen_new_label();
|
2856 |
int label_continue = gen_new_label();
|
2857 |
|
2858 |
arm_gen_test_cc(cond, label_match); |
2859 |
/* nomatch: */
|
2860 |
tcg_src = cpu_reg(s, rm); |
2861 |
|
2862 |
if (else_inv && else_inc) {
|
2863 |
tcg_gen_neg_i64(tcg_rd, tcg_src); |
2864 |
} else if (else_inv) { |
2865 |
tcg_gen_not_i64(tcg_rd, tcg_src); |
2866 |
} else if (else_inc) { |
2867 |
tcg_gen_addi_i64(tcg_rd, tcg_src, 1);
|
2868 |
} else {
|
2869 |
tcg_gen_mov_i64(tcg_rd, tcg_src); |
2870 |
} |
2871 |
if (!sf) {
|
2872 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
2873 |
} |
2874 |
tcg_gen_br(label_continue); |
2875 |
/* match: */
|
2876 |
gen_set_label(label_match); |
2877 |
tcg_src = read_cpu_reg(s, rn, sf); |
2878 |
tcg_gen_mov_i64(tcg_rd, tcg_src); |
2879 |
/* continue: */
|
2880 |
gen_set_label(label_continue); |
2881 |
} |
2882 |
} |
2883 |
|
2884 |
static void handle_clz(DisasContext *s, unsigned int sf, |
2885 |
unsigned int rn, unsigned int rd) |
2886 |
{ |
2887 |
TCGv_i64 tcg_rd, tcg_rn; |
2888 |
tcg_rd = cpu_reg(s, rd); |
2889 |
tcg_rn = cpu_reg(s, rn); |
2890 |
|
2891 |
if (sf) {
|
2892 |
gen_helper_clz64(tcg_rd, tcg_rn); |
2893 |
} else {
|
2894 |
TCGv_i32 tcg_tmp32 = tcg_temp_new_i32(); |
2895 |
tcg_gen_trunc_i64_i32(tcg_tmp32, tcg_rn); |
2896 |
gen_helper_clz(tcg_tmp32, tcg_tmp32); |
2897 |
tcg_gen_extu_i32_i64(tcg_rd, tcg_tmp32); |
2898 |
tcg_temp_free_i32(tcg_tmp32); |
2899 |
} |
2900 |
} |
2901 |
|
2902 |
static void handle_cls(DisasContext *s, unsigned int sf, |
2903 |
unsigned int rn, unsigned int rd) |
2904 |
{ |
2905 |
TCGv_i64 tcg_rd, tcg_rn; |
2906 |
tcg_rd = cpu_reg(s, rd); |
2907 |
tcg_rn = cpu_reg(s, rn); |
2908 |
|
2909 |
if (sf) {
|
2910 |
gen_helper_cls64(tcg_rd, tcg_rn); |
2911 |
} else {
|
2912 |
TCGv_i32 tcg_tmp32 = tcg_temp_new_i32(); |
2913 |
tcg_gen_trunc_i64_i32(tcg_tmp32, tcg_rn); |
2914 |
gen_helper_cls32(tcg_tmp32, tcg_tmp32); |
2915 |
tcg_gen_extu_i32_i64(tcg_rd, tcg_tmp32); |
2916 |
tcg_temp_free_i32(tcg_tmp32); |
2917 |
} |
2918 |
} |
2919 |
|
2920 |
static void handle_rbit(DisasContext *s, unsigned int sf, |
2921 |
unsigned int rn, unsigned int rd) |
2922 |
{ |
2923 |
TCGv_i64 tcg_rd, tcg_rn; |
2924 |
tcg_rd = cpu_reg(s, rd); |
2925 |
tcg_rn = cpu_reg(s, rn); |
2926 |
|
2927 |
if (sf) {
|
2928 |
gen_helper_rbit64(tcg_rd, tcg_rn); |
2929 |
} else {
|
2930 |
TCGv_i32 tcg_tmp32 = tcg_temp_new_i32(); |
2931 |
tcg_gen_trunc_i64_i32(tcg_tmp32, tcg_rn); |
2932 |
gen_helper_rbit(tcg_tmp32, tcg_tmp32); |
2933 |
tcg_gen_extu_i32_i64(tcg_rd, tcg_tmp32); |
2934 |
tcg_temp_free_i32(tcg_tmp32); |
2935 |
} |
2936 |
} |
2937 |
|
2938 |
/* C5.6.149 REV with sf==1, opcode==3 ("REV64") */
|
2939 |
static void handle_rev64(DisasContext *s, unsigned int sf, |
2940 |
unsigned int rn, unsigned int rd) |
2941 |
{ |
2942 |
if (!sf) {
|
2943 |
unallocated_encoding(s); |
2944 |
return;
|
2945 |
} |
2946 |
tcg_gen_bswap64_i64(cpu_reg(s, rd), cpu_reg(s, rn)); |
2947 |
} |
2948 |
|
2949 |
/* C5.6.149 REV with sf==0, opcode==2
|
2950 |
* C5.6.151 REV32 (sf==1, opcode==2)
|
2951 |
*/
|
2952 |
static void handle_rev32(DisasContext *s, unsigned int sf, |
2953 |
unsigned int rn, unsigned int rd) |
2954 |
{ |
2955 |
TCGv_i64 tcg_rd = cpu_reg(s, rd); |
2956 |
|
2957 |
if (sf) {
|
2958 |
TCGv_i64 tcg_tmp = tcg_temp_new_i64(); |
2959 |
TCGv_i64 tcg_rn = read_cpu_reg(s, rn, sf); |
2960 |
|
2961 |
/* bswap32_i64 requires zero high word */
|
2962 |
tcg_gen_ext32u_i64(tcg_tmp, tcg_rn); |
2963 |
tcg_gen_bswap32_i64(tcg_rd, tcg_tmp); |
2964 |
tcg_gen_shri_i64(tcg_tmp, tcg_rn, 32);
|
2965 |
tcg_gen_bswap32_i64(tcg_tmp, tcg_tmp); |
2966 |
tcg_gen_concat32_i64(tcg_rd, tcg_rd, tcg_tmp); |
2967 |
|
2968 |
tcg_temp_free_i64(tcg_tmp); |
2969 |
} else {
|
2970 |
tcg_gen_ext32u_i64(tcg_rd, cpu_reg(s, rn)); |
2971 |
tcg_gen_bswap32_i64(tcg_rd, tcg_rd); |
2972 |
} |
2973 |
} |
2974 |
|
2975 |
/* C5.6.150 REV16 (opcode==1) */
|
2976 |
static void handle_rev16(DisasContext *s, unsigned int sf, |
2977 |
unsigned int rn, unsigned int rd) |
2978 |
{ |
2979 |
TCGv_i64 tcg_rd = cpu_reg(s, rd); |
2980 |
TCGv_i64 tcg_tmp = tcg_temp_new_i64(); |
2981 |
TCGv_i64 tcg_rn = read_cpu_reg(s, rn, sf); |
2982 |
|
2983 |
tcg_gen_andi_i64(tcg_tmp, tcg_rn, 0xffff);
|
2984 |
tcg_gen_bswap16_i64(tcg_rd, tcg_tmp); |
2985 |
|
2986 |
tcg_gen_shri_i64(tcg_tmp, tcg_rn, 16);
|
2987 |
tcg_gen_andi_i64(tcg_tmp, tcg_tmp, 0xffff);
|
2988 |
tcg_gen_bswap16_i64(tcg_tmp, tcg_tmp); |
2989 |
tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_tmp, 16, 16); |
2990 |
|
2991 |
if (sf) {
|
2992 |
tcg_gen_shri_i64(tcg_tmp, tcg_rn, 32);
|
2993 |
tcg_gen_andi_i64(tcg_tmp, tcg_tmp, 0xffff);
|
2994 |
tcg_gen_bswap16_i64(tcg_tmp, tcg_tmp); |
2995 |
tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_tmp, 32, 16); |
2996 |
|
2997 |
tcg_gen_shri_i64(tcg_tmp, tcg_rn, 48);
|
2998 |
tcg_gen_bswap16_i64(tcg_tmp, tcg_tmp); |
2999 |
tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_tmp, 48, 16); |
3000 |
} |
3001 |
|
3002 |
tcg_temp_free_i64(tcg_tmp); |
3003 |
} |
3004 |
|
3005 |
/* C3.5.7 Data-processing (1 source)
|
3006 |
* 31 30 29 28 21 20 16 15 10 9 5 4 0
|
3007 |
* +----+---+---+-----------------+---------+--------+------+------+
|
3008 |
* | sf | 1 | S | 1 1 0 1 0 1 1 0 | opcode2 | opcode | Rn | Rd |
|
3009 |
* +----+---+---+-----------------+---------+--------+------+------+
|
3010 |
*/
|
3011 |
static void disas_data_proc_1src(DisasContext *s, uint32_t insn) |
3012 |
{ |
3013 |
unsigned int sf, opcode, rn, rd; |
3014 |
|
3015 |
if (extract32(insn, 29, 1) || extract32(insn, 16, 5)) { |
3016 |
unallocated_encoding(s); |
3017 |
return;
|
3018 |
} |
3019 |
|
3020 |
sf = extract32(insn, 31, 1); |
3021 |
opcode = extract32(insn, 10, 6); |
3022 |
rn = extract32(insn, 5, 5); |
3023 |
rd = extract32(insn, 0, 5); |
3024 |
|
3025 |
switch (opcode) {
|
3026 |
case 0: /* RBIT */ |
3027 |
handle_rbit(s, sf, rn, rd); |
3028 |
break;
|
3029 |
case 1: /* REV16 */ |
3030 |
handle_rev16(s, sf, rn, rd); |
3031 |
break;
|
3032 |
case 2: /* REV32 */ |
3033 |
handle_rev32(s, sf, rn, rd); |
3034 |
break;
|
3035 |
case 3: /* REV64 */ |
3036 |
handle_rev64(s, sf, rn, rd); |
3037 |
break;
|
3038 |
case 4: /* CLZ */ |
3039 |
handle_clz(s, sf, rn, rd); |
3040 |
break;
|
3041 |
case 5: /* CLS */ |
3042 |
handle_cls(s, sf, rn, rd); |
3043 |
break;
|
3044 |
} |
3045 |
} |
3046 |
|
3047 |
static void handle_div(DisasContext *s, bool is_signed, unsigned int sf, |
3048 |
unsigned int rm, unsigned int rn, unsigned int rd) |
3049 |
{ |
3050 |
TCGv_i64 tcg_n, tcg_m, tcg_rd; |
3051 |
tcg_rd = cpu_reg(s, rd); |
3052 |
|
3053 |
if (!sf && is_signed) {
|
3054 |
tcg_n = new_tmp_a64(s); |
3055 |
tcg_m = new_tmp_a64(s); |
3056 |
tcg_gen_ext32s_i64(tcg_n, cpu_reg(s, rn)); |
3057 |
tcg_gen_ext32s_i64(tcg_m, cpu_reg(s, rm)); |
3058 |
} else {
|
3059 |
tcg_n = read_cpu_reg(s, rn, sf); |
3060 |
tcg_m = read_cpu_reg(s, rm, sf); |
3061 |
} |
3062 |
|
3063 |
if (is_signed) {
|
3064 |
gen_helper_sdiv64(tcg_rd, tcg_n, tcg_m); |
3065 |
} else {
|
3066 |
gen_helper_udiv64(tcg_rd, tcg_n, tcg_m); |
3067 |
} |
3068 |
|
3069 |
if (!sf) { /* zero extend final result */ |
3070 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
3071 |
} |
3072 |
} |
3073 |
|
3074 |
/* C5.6.115 LSLV, C5.6.118 LSRV, C5.6.17 ASRV, C5.6.154 RORV */
|
3075 |
static void handle_shift_reg(DisasContext *s, |
3076 |
enum a64_shift_type shift_type, unsigned int sf, |
3077 |
unsigned int rm, unsigned int rn, unsigned int rd) |
3078 |
{ |
3079 |
TCGv_i64 tcg_shift = tcg_temp_new_i64(); |
3080 |
TCGv_i64 tcg_rd = cpu_reg(s, rd); |
3081 |
TCGv_i64 tcg_rn = read_cpu_reg(s, rn, sf); |
3082 |
|
3083 |
tcg_gen_andi_i64(tcg_shift, cpu_reg(s, rm), sf ? 63 : 31); |
3084 |
shift_reg(tcg_rd, tcg_rn, sf, shift_type, tcg_shift); |
3085 |
tcg_temp_free_i64(tcg_shift); |
3086 |
} |
3087 |
|
3088 |
/* C3.5.8 Data-processing (2 source)
|
3089 |
* 31 30 29 28 21 20 16 15 10 9 5 4 0
|
3090 |
* +----+---+---+-----------------+------+--------+------+------+
|
3091 |
* | sf | 0 | S | 1 1 0 1 0 1 1 0 | Rm | opcode | Rn | Rd |
|
3092 |
* +----+---+---+-----------------+------+--------+------+------+
|
3093 |
*/
|
3094 |
static void disas_data_proc_2src(DisasContext *s, uint32_t insn) |
3095 |
{ |
3096 |
unsigned int sf, rm, opcode, rn, rd; |
3097 |
sf = extract32(insn, 31, 1); |
3098 |
rm = extract32(insn, 16, 5); |
3099 |
opcode = extract32(insn, 10, 6); |
3100 |
rn = extract32(insn, 5, 5); |
3101 |
rd = extract32(insn, 0, 5); |
3102 |
|
3103 |
if (extract32(insn, 29, 1)) { |
3104 |
unallocated_encoding(s); |
3105 |
return;
|
3106 |
} |
3107 |
|
3108 |
switch (opcode) {
|
3109 |
case 2: /* UDIV */ |
3110 |
handle_div(s, false, sf, rm, rn, rd);
|
3111 |
break;
|
3112 |
case 3: /* SDIV */ |
3113 |
handle_div(s, true, sf, rm, rn, rd);
|
3114 |
break;
|
3115 |
case 8: /* LSLV */ |
3116 |
handle_shift_reg(s, A64_SHIFT_TYPE_LSL, sf, rm, rn, rd); |
3117 |
break;
|
3118 |
case 9: /* LSRV */ |
3119 |
handle_shift_reg(s, A64_SHIFT_TYPE_LSR, sf, rm, rn, rd); |
3120 |
break;
|
3121 |
case 10: /* ASRV */ |
3122 |
handle_shift_reg(s, A64_SHIFT_TYPE_ASR, sf, rm, rn, rd); |
3123 |
break;
|
3124 |
case 11: /* RORV */ |
3125 |
handle_shift_reg(s, A64_SHIFT_TYPE_ROR, sf, rm, rn, rd); |
3126 |
break;
|
3127 |
case 16: |
3128 |
case 17: |
3129 |
case 18: |
3130 |
case 19: |
3131 |
case 20: |
3132 |
case 21: |
3133 |
case 22: |
3134 |
case 23: /* CRC32 */ |
3135 |
unsupported_encoding(s, insn); |
3136 |
break;
|
3137 |
default:
|
3138 |
unallocated_encoding(s); |
3139 |
break;
|
3140 |
} |
3141 |
} |
3142 |
|
3143 |
/* C3.5 Data processing - register */
|
3144 |
static void disas_data_proc_reg(DisasContext *s, uint32_t insn) |
3145 |
{ |
3146 |
switch (extract32(insn, 24, 5)) { |
3147 |
case 0x0a: /* Logical (shifted register) */ |
3148 |
disas_logic_reg(s, insn); |
3149 |
break;
|
3150 |
case 0x0b: /* Add/subtract */ |
3151 |
if (insn & (1 << 21)) { /* (extended register) */ |
3152 |
disas_add_sub_ext_reg(s, insn); |
3153 |
} else {
|
3154 |
disas_add_sub_reg(s, insn); |
3155 |
} |
3156 |
break;
|
3157 |
case 0x1b: /* Data-processing (3 source) */ |
3158 |
disas_data_proc_3src(s, insn); |
3159 |
break;
|
3160 |
case 0x1a: |
3161 |
switch (extract32(insn, 21, 3)) { |
3162 |
case 0x0: /* Add/subtract (with carry) */ |
3163 |
disas_adc_sbc(s, insn); |
3164 |
break;
|
3165 |
case 0x2: /* Conditional compare */ |
3166 |
disas_cc(s, insn); /* both imm and reg forms */
|
3167 |
break;
|
3168 |
case 0x4: /* Conditional select */ |
3169 |
disas_cond_select(s, insn); |
3170 |
break;
|
3171 |
case 0x6: /* Data-processing */ |
3172 |
if (insn & (1 << 30)) { /* (1 source) */ |
3173 |
disas_data_proc_1src(s, insn); |
3174 |
} else { /* (2 source) */ |
3175 |
disas_data_proc_2src(s, insn); |
3176 |
} |
3177 |
break;
|
3178 |
default:
|
3179 |
unallocated_encoding(s); |
3180 |
break;
|
3181 |
} |
3182 |
break;
|
3183 |
default:
|
3184 |
unallocated_encoding(s); |
3185 |
break;
|
3186 |
} |
3187 |
} |
3188 |
|
3189 |
/* Convert ARM rounding mode to softfloat */
|
3190 |
static inline int arm_rmode_to_sf(int rmode) |
3191 |
{ |
3192 |
switch (rmode) {
|
3193 |
case FPROUNDING_TIEAWAY:
|
3194 |
rmode = float_round_ties_away; |
3195 |
break;
|
3196 |
case FPROUNDING_ODD:
|
3197 |
/* FIXME: add support for TIEAWAY and ODD */
|
3198 |
qemu_log_mask(LOG_UNIMP, "arm: unimplemented rounding mode: %d\n",
|
3199 |
rmode); |
3200 |
case FPROUNDING_TIEEVEN:
|
3201 |
default:
|
3202 |
rmode = float_round_nearest_even; |
3203 |
break;
|
3204 |
case FPROUNDING_POSINF:
|
3205 |
rmode = float_round_up; |
3206 |
break;
|
3207 |
case FPROUNDING_NEGINF:
|
3208 |
rmode = float_round_down; |
3209 |
break;
|
3210 |
case FPROUNDING_ZERO:
|
3211 |
rmode = float_round_to_zero; |
3212 |
break;
|
3213 |
} |
3214 |
return rmode;
|
3215 |
} |
3216 |
|
3217 |
static void handle_fp_compare(DisasContext *s, bool is_double, |
3218 |
unsigned int rn, unsigned int rm, |
3219 |
bool cmp_with_zero, bool signal_all_nans) |
3220 |
{ |
3221 |
TCGv_i64 tcg_flags = tcg_temp_new_i64(); |
3222 |
TCGv_ptr fpst = get_fpstatus_ptr(); |
3223 |
|
3224 |
if (is_double) {
|
3225 |
TCGv_i64 tcg_vn, tcg_vm; |
3226 |
|
3227 |
tcg_vn = read_fp_dreg(s, rn); |
3228 |
if (cmp_with_zero) {
|
3229 |
tcg_vm = tcg_const_i64(0);
|
3230 |
} else {
|
3231 |
tcg_vm = read_fp_dreg(s, rm); |
3232 |
} |
3233 |
if (signal_all_nans) {
|
3234 |
gen_helper_vfp_cmped_a64(tcg_flags, tcg_vn, tcg_vm, fpst); |
3235 |
} else {
|
3236 |
gen_helper_vfp_cmpd_a64(tcg_flags, tcg_vn, tcg_vm, fpst); |
3237 |
} |
3238 |
tcg_temp_free_i64(tcg_vn); |
3239 |
tcg_temp_free_i64(tcg_vm); |
3240 |
} else {
|
3241 |
TCGv_i32 tcg_vn, tcg_vm; |
3242 |
|
3243 |
tcg_vn = read_fp_sreg(s, rn); |
3244 |
if (cmp_with_zero) {
|
3245 |
tcg_vm = tcg_const_i32(0);
|
3246 |
} else {
|
3247 |
tcg_vm = read_fp_sreg(s, rm); |
3248 |
} |
3249 |
if (signal_all_nans) {
|
3250 |
gen_helper_vfp_cmpes_a64(tcg_flags, tcg_vn, tcg_vm, fpst); |
3251 |
} else {
|
3252 |
gen_helper_vfp_cmps_a64(tcg_flags, tcg_vn, tcg_vm, fpst); |
3253 |
} |
3254 |
tcg_temp_free_i32(tcg_vn); |
3255 |
tcg_temp_free_i32(tcg_vm); |
3256 |
} |
3257 |
|
3258 |
tcg_temp_free_ptr(fpst); |
3259 |
|
3260 |
gen_set_nzcv(tcg_flags); |
3261 |
|
3262 |
tcg_temp_free_i64(tcg_flags); |
3263 |
} |
3264 |
|
3265 |
/* C3.6.22 Floating point compare
|
3266 |
* 31 30 29 28 24 23 22 21 20 16 15 14 13 10 9 5 4 0
|
3267 |
* +---+---+---+-----------+------+---+------+-----+---------+------+-------+
|
3268 |
* | M | 0 | S | 1 1 1 1 0 | type | 1 | Rm | op | 1 0 0 0 | Rn | op2 |
|
3269 |
* +---+---+---+-----------+------+---+------+-----+---------+------+-------+
|
3270 |
*/
|
3271 |
static void disas_fp_compare(DisasContext *s, uint32_t insn) |
3272 |
{ |
3273 |
unsigned int mos, type, rm, op, rn, opc, op2r; |
3274 |
|
3275 |
mos = extract32(insn, 29, 3); |
3276 |
type = extract32(insn, 22, 2); /* 0 = single, 1 = double */ |
3277 |
rm = extract32(insn, 16, 5); |
3278 |
op = extract32(insn, 14, 2); |
3279 |
rn = extract32(insn, 5, 5); |
3280 |
opc = extract32(insn, 3, 2); |
3281 |
op2r = extract32(insn, 0, 3); |
3282 |
|
3283 |
if (mos || op || op2r || type > 1) { |
3284 |
unallocated_encoding(s); |
3285 |
return;
|
3286 |
} |
3287 |
|
3288 |
handle_fp_compare(s, type, rn, rm, opc & 1, opc & 2); |
3289 |
} |
3290 |
|
3291 |
/* C3.6.23 Floating point conditional compare
|
3292 |
* 31 30 29 28 24 23 22 21 20 16 15 12 11 10 9 5 4 3 0
|
3293 |
* +---+---+---+-----------+------+---+------+------+-----+------+----+------+
|
3294 |
* | M | 0 | S | 1 1 1 1 0 | type | 1 | Rm | cond | 0 1 | Rn | op | nzcv |
|
3295 |
* +---+---+---+-----------+------+---+------+------+-----+------+----+------+
|
3296 |
*/
|
3297 |
static void disas_fp_ccomp(DisasContext *s, uint32_t insn) |
3298 |
{ |
3299 |
unsigned int mos, type, rm, cond, rn, op, nzcv; |
3300 |
TCGv_i64 tcg_flags; |
3301 |
int label_continue = -1; |
3302 |
|
3303 |
mos = extract32(insn, 29, 3); |
3304 |
type = extract32(insn, 22, 2); /* 0 = single, 1 = double */ |
3305 |
rm = extract32(insn, 16, 5); |
3306 |
cond = extract32(insn, 12, 4); |
3307 |
rn = extract32(insn, 5, 5); |
3308 |
op = extract32(insn, 4, 1); |
3309 |
nzcv = extract32(insn, 0, 4); |
3310 |
|
3311 |
if (mos || type > 1) { |
3312 |
unallocated_encoding(s); |
3313 |
return;
|
3314 |
} |
3315 |
|
3316 |
if (cond < 0x0e) { /* not always */ |
3317 |
int label_match = gen_new_label();
|
3318 |
label_continue = gen_new_label(); |
3319 |
arm_gen_test_cc(cond, label_match); |
3320 |
/* nomatch: */
|
3321 |
tcg_flags = tcg_const_i64(nzcv << 28);
|
3322 |
gen_set_nzcv(tcg_flags); |
3323 |
tcg_temp_free_i64(tcg_flags); |
3324 |
tcg_gen_br(label_continue); |
3325 |
gen_set_label(label_match); |
3326 |
} |
3327 |
|
3328 |
handle_fp_compare(s, type, rn, rm, false, op);
|
3329 |
|
3330 |
if (cond < 0x0e) { |
3331 |
gen_set_label(label_continue); |
3332 |
} |
3333 |
} |
3334 |
|
3335 |
/* copy src FP register to dst FP register; type specifies single or double */
|
3336 |
static void gen_mov_fp2fp(DisasContext *s, int type, int dst, int src) |
3337 |
{ |
3338 |
if (type) {
|
3339 |
TCGv_i64 v = read_fp_dreg(s, src); |
3340 |
write_fp_dreg(s, dst, v); |
3341 |
tcg_temp_free_i64(v); |
3342 |
} else {
|
3343 |
TCGv_i32 v = read_fp_sreg(s, src); |
3344 |
write_fp_sreg(s, dst, v); |
3345 |
tcg_temp_free_i32(v); |
3346 |
} |
3347 |
} |
3348 |
|
3349 |
/* C3.6.24 Floating point conditional select
|
3350 |
* 31 30 29 28 24 23 22 21 20 16 15 12 11 10 9 5 4 0
|
3351 |
* +---+---+---+-----------+------+---+------+------+-----+------+------+
|
3352 |
* | M | 0 | S | 1 1 1 1 0 | type | 1 | Rm | cond | 1 1 | Rn | Rd |
|
3353 |
* +---+---+---+-----------+------+---+------+------+-----+------+------+
|
3354 |
*/
|
3355 |
static void disas_fp_csel(DisasContext *s, uint32_t insn) |
3356 |
{ |
3357 |
unsigned int mos, type, rm, cond, rn, rd; |
3358 |
int label_continue = -1; |
3359 |
|
3360 |
mos = extract32(insn, 29, 3); |
3361 |
type = extract32(insn, 22, 2); /* 0 = single, 1 = double */ |
3362 |
rm = extract32(insn, 16, 5); |
3363 |
cond = extract32(insn, 12, 4); |
3364 |
rn = extract32(insn, 5, 5); |
3365 |
rd = extract32(insn, 0, 5); |
3366 |
|
3367 |
if (mos || type > 1) { |
3368 |
unallocated_encoding(s); |
3369 |
return;
|
3370 |
} |
3371 |
|
3372 |
if (cond < 0x0e) { /* not always */ |
3373 |
int label_match = gen_new_label();
|
3374 |
label_continue = gen_new_label(); |
3375 |
arm_gen_test_cc(cond, label_match); |
3376 |
/* nomatch: */
|
3377 |
gen_mov_fp2fp(s, type, rd, rm); |
3378 |
tcg_gen_br(label_continue); |
3379 |
gen_set_label(label_match); |
3380 |
} |
3381 |
|
3382 |
gen_mov_fp2fp(s, type, rd, rn); |
3383 |
|
3384 |
if (cond < 0x0e) { /* continue */ |
3385 |
gen_set_label(label_continue); |
3386 |
} |
3387 |
} |
3388 |
|
3389 |
/* C3.6.25 Floating point data-processing (1 source)
|
3390 |
* 31 30 29 28 24 23 22 21 20 15 14 10 9 5 4 0
|
3391 |
* +---+---+---+-----------+------+---+--------+-----------+------+------+
|
3392 |
* | M | 0 | S | 1 1 1 1 0 | type | 1 | opcode | 1 0 0 0 0 | Rn | Rd |
|
3393 |
* +---+---+---+-----------+------+---+--------+-----------+------+------+
|
3394 |
*/
|
3395 |
static void disas_fp_1src(DisasContext *s, uint32_t insn) |
3396 |
{ |
3397 |
unsupported_encoding(s, insn); |
3398 |
} |
3399 |
|
3400 |
/* C3.6.26 Floating-point data-processing (2 source) - single precision */
|
3401 |
static void handle_fp_2src_single(DisasContext *s, int opcode, |
3402 |
int rd, int rn, int rm) |
3403 |
{ |
3404 |
TCGv_i32 tcg_op1; |
3405 |
TCGv_i32 tcg_op2; |
3406 |
TCGv_i32 tcg_res; |
3407 |
TCGv_ptr fpst; |
3408 |
|
3409 |
tcg_res = tcg_temp_new_i32(); |
3410 |
fpst = get_fpstatus_ptr(); |
3411 |
tcg_op1 = read_fp_sreg(s, rn); |
3412 |
tcg_op2 = read_fp_sreg(s, rm); |
3413 |
|
3414 |
switch (opcode) {
|
3415 |
case 0x0: /* FMUL */ |
3416 |
gen_helper_vfp_muls(tcg_res, tcg_op1, tcg_op2, fpst); |
3417 |
break;
|
3418 |
case 0x1: /* FDIV */ |
3419 |
gen_helper_vfp_divs(tcg_res, tcg_op1, tcg_op2, fpst); |
3420 |
break;
|
3421 |
case 0x2: /* FADD */ |
3422 |
gen_helper_vfp_adds(tcg_res, tcg_op1, tcg_op2, fpst); |
3423 |
break;
|
3424 |
case 0x3: /* FSUB */ |
3425 |
gen_helper_vfp_subs(tcg_res, tcg_op1, tcg_op2, fpst); |
3426 |
break;
|
3427 |
case 0x4: /* FMAX */ |
3428 |
gen_helper_vfp_maxs(tcg_res, tcg_op1, tcg_op2, fpst); |
3429 |
break;
|
3430 |
case 0x5: /* FMIN */ |
3431 |
gen_helper_vfp_mins(tcg_res, tcg_op1, tcg_op2, fpst); |
3432 |
break;
|
3433 |
case 0x6: /* FMAXNM */ |
3434 |
gen_helper_vfp_maxnums(tcg_res, tcg_op1, tcg_op2, fpst); |
3435 |
break;
|
3436 |
case 0x7: /* FMINNM */ |
3437 |
gen_helper_vfp_minnums(tcg_res, tcg_op1, tcg_op2, fpst); |
3438 |
break;
|
3439 |
case 0x8: /* FNMUL */ |
3440 |
gen_helper_vfp_muls(tcg_res, tcg_op1, tcg_op2, fpst); |
3441 |
gen_helper_vfp_negs(tcg_res, tcg_res); |
3442 |
break;
|
3443 |
} |
3444 |
|
3445 |
write_fp_sreg(s, rd, tcg_res); |
3446 |
|
3447 |
tcg_temp_free_ptr(fpst); |
3448 |
tcg_temp_free_i32(tcg_op1); |
3449 |
tcg_temp_free_i32(tcg_op2); |
3450 |
tcg_temp_free_i32(tcg_res); |
3451 |
} |
3452 |
|
3453 |
/* C3.6.26 Floating-point data-processing (2 source) - double precision */
|
3454 |
static void handle_fp_2src_double(DisasContext *s, int opcode, |
3455 |
int rd, int rn, int rm) |
3456 |
{ |
3457 |
TCGv_i64 tcg_op1; |
3458 |
TCGv_i64 tcg_op2; |
3459 |
TCGv_i64 tcg_res; |
3460 |
TCGv_ptr fpst; |
3461 |
|
3462 |
tcg_res = tcg_temp_new_i64(); |
3463 |
fpst = get_fpstatus_ptr(); |
3464 |
tcg_op1 = read_fp_dreg(s, rn); |
3465 |
tcg_op2 = read_fp_dreg(s, rm); |
3466 |
|
3467 |
switch (opcode) {
|
3468 |
case 0x0: /* FMUL */ |
3469 |
gen_helper_vfp_muld(tcg_res, tcg_op1, tcg_op2, fpst); |
3470 |
break;
|
3471 |
case 0x1: /* FDIV */ |
3472 |
gen_helper_vfp_divd(tcg_res, tcg_op1, tcg_op2, fpst); |
3473 |
break;
|
3474 |
case 0x2: /* FADD */ |
3475 |
gen_helper_vfp_addd(tcg_res, tcg_op1, tcg_op2, fpst); |
3476 |
break;
|
3477 |
case 0x3: /* FSUB */ |
3478 |
gen_helper_vfp_subd(tcg_res, tcg_op1, tcg_op2, fpst); |
3479 |
break;
|
3480 |
case 0x4: /* FMAX */ |
3481 |
gen_helper_vfp_maxd(tcg_res, tcg_op1, tcg_op2, fpst); |
3482 |
break;
|
3483 |
case 0x5: /* FMIN */ |
3484 |
gen_helper_vfp_mind(tcg_res, tcg_op1, tcg_op2, fpst); |
3485 |
break;
|
3486 |
case 0x6: /* FMAXNM */ |
3487 |
gen_helper_vfp_maxnumd(tcg_res, tcg_op1, tcg_op2, fpst); |
3488 |
break;
|
3489 |
case 0x7: /* FMINNM */ |
3490 |
gen_helper_vfp_minnumd(tcg_res, tcg_op1, tcg_op2, fpst); |
3491 |
break;
|
3492 |
case 0x8: /* FNMUL */ |
3493 |
gen_helper_vfp_muld(tcg_res, tcg_op1, tcg_op2, fpst); |
3494 |
gen_helper_vfp_negd(tcg_res, tcg_res); |
3495 |
break;
|
3496 |
} |
3497 |
|
3498 |
write_fp_dreg(s, rd, tcg_res); |
3499 |
|
3500 |
tcg_temp_free_ptr(fpst); |
3501 |
tcg_temp_free_i64(tcg_op1); |
3502 |
tcg_temp_free_i64(tcg_op2); |
3503 |
tcg_temp_free_i64(tcg_res); |
3504 |
} |
3505 |
|
3506 |
/* C3.6.26 Floating point data-processing (2 source)
|
3507 |
* 31 30 29 28 24 23 22 21 20 16 15 12 11 10 9 5 4 0
|
3508 |
* +---+---+---+-----------+------+---+------+--------+-----+------+------+
|
3509 |
* | M | 0 | S | 1 1 1 1 0 | type | 1 | Rm | opcode | 1 0 | Rn | Rd |
|
3510 |
* +---+---+---+-----------+------+---+------+--------+-----+------+------+
|
3511 |
*/
|
3512 |
static void disas_fp_2src(DisasContext *s, uint32_t insn) |
3513 |
{ |
3514 |
int type = extract32(insn, 22, 2); |
3515 |
int rd = extract32(insn, 0, 5); |
3516 |
int rn = extract32(insn, 5, 5); |
3517 |
int rm = extract32(insn, 16, 5); |
3518 |
int opcode = extract32(insn, 12, 4); |
3519 |
|
3520 |
if (opcode > 8) { |
3521 |
unallocated_encoding(s); |
3522 |
return;
|
3523 |
} |
3524 |
|
3525 |
switch (type) {
|
3526 |
case 0: |
3527 |
handle_fp_2src_single(s, opcode, rd, rn, rm); |
3528 |
break;
|
3529 |
case 1: |
3530 |
handle_fp_2src_double(s, opcode, rd, rn, rm); |
3531 |
break;
|
3532 |
default:
|
3533 |
unallocated_encoding(s); |
3534 |
} |
3535 |
} |
3536 |
|
3537 |
/* C3.6.27 Floating-point data-processing (3 source) - single precision */
|
3538 |
static void handle_fp_3src_single(DisasContext *s, bool o0, bool o1, |
3539 |
int rd, int rn, int rm, int ra) |
3540 |
{ |
3541 |
TCGv_i32 tcg_op1, tcg_op2, tcg_op3; |
3542 |
TCGv_i32 tcg_res = tcg_temp_new_i32(); |
3543 |
TCGv_ptr fpst = get_fpstatus_ptr(); |
3544 |
|
3545 |
tcg_op1 = read_fp_sreg(s, rn); |
3546 |
tcg_op2 = read_fp_sreg(s, rm); |
3547 |
tcg_op3 = read_fp_sreg(s, ra); |
3548 |
|
3549 |
/* These are fused multiply-add, and must be done as one
|
3550 |
* floating point operation with no rounding between the
|
3551 |
* multiplication and addition steps.
|
3552 |
* NB that doing the negations here as separate steps is
|
3553 |
* correct : an input NaN should come out with its sign bit
|
3554 |
* flipped if it is a negated-input.
|
3555 |
*/
|
3556 |
if (o1 == true) { |
3557 |
gen_helper_vfp_negs(tcg_op3, tcg_op3); |
3558 |
} |
3559 |
|
3560 |
if (o0 != o1) {
|
3561 |
gen_helper_vfp_negs(tcg_op1, tcg_op1); |
3562 |
} |
3563 |
|
3564 |
gen_helper_vfp_muladds(tcg_res, tcg_op1, tcg_op2, tcg_op3, fpst); |
3565 |
|
3566 |
write_fp_sreg(s, rd, tcg_res); |
3567 |
|
3568 |
tcg_temp_free_ptr(fpst); |
3569 |
tcg_temp_free_i32(tcg_op1); |
3570 |
tcg_temp_free_i32(tcg_op2); |
3571 |
tcg_temp_free_i32(tcg_op3); |
3572 |
tcg_temp_free_i32(tcg_res); |
3573 |
} |
3574 |
|
3575 |
/* C3.6.27 Floating-point data-processing (3 source) - double precision */
|
3576 |
static void handle_fp_3src_double(DisasContext *s, bool o0, bool o1, |
3577 |
int rd, int rn, int rm, int ra) |
3578 |
{ |
3579 |
TCGv_i64 tcg_op1, tcg_op2, tcg_op3; |
3580 |
TCGv_i64 tcg_res = tcg_temp_new_i64(); |
3581 |
TCGv_ptr fpst = get_fpstatus_ptr(); |
3582 |
|
3583 |
tcg_op1 = read_fp_dreg(s, rn); |
3584 |
tcg_op2 = read_fp_dreg(s, rm); |
3585 |
tcg_op3 = read_fp_dreg(s, ra); |
3586 |
|
3587 |
/* These are fused multiply-add, and must be done as one
|
3588 |
* floating point operation with no rounding between the
|
3589 |
* multiplication and addition steps.
|
3590 |
* NB that doing the negations here as separate steps is
|
3591 |
* correct : an input NaN should come out with its sign bit
|
3592 |
* flipped if it is a negated-input.
|
3593 |
*/
|
3594 |
if (o1 == true) { |
3595 |
gen_helper_vfp_negd(tcg_op3, tcg_op3); |
3596 |
} |
3597 |
|
3598 |
if (o0 != o1) {
|
3599 |
gen_helper_vfp_negd(tcg_op1, tcg_op1); |
3600 |
} |
3601 |
|
3602 |
gen_helper_vfp_muladdd(tcg_res, tcg_op1, tcg_op2, tcg_op3, fpst); |
3603 |
|
3604 |
write_fp_dreg(s, rd, tcg_res); |
3605 |
|
3606 |
tcg_temp_free_ptr(fpst); |
3607 |
tcg_temp_free_i64(tcg_op1); |
3608 |
tcg_temp_free_i64(tcg_op2); |
3609 |
tcg_temp_free_i64(tcg_op3); |
3610 |
tcg_temp_free_i64(tcg_res); |
3611 |
} |
3612 |
|
3613 |
/* C3.6.27 Floating point data-processing (3 source)
|
3614 |
* 31 30 29 28 24 23 22 21 20 16 15 14 10 9 5 4 0
|
3615 |
* +---+---+---+-----------+------+----+------+----+------+------+------+
|
3616 |
* | M | 0 | S | 1 1 1 1 1 | type | o1 | Rm | o0 | Ra | Rn | Rd |
|
3617 |
* +---+---+---+-----------+------+----+------+----+------+------+------+
|
3618 |
*/
|
3619 |
static void disas_fp_3src(DisasContext *s, uint32_t insn) |
3620 |
{ |
3621 |
int type = extract32(insn, 22, 2); |
3622 |
int rd = extract32(insn, 0, 5); |
3623 |
int rn = extract32(insn, 5, 5); |
3624 |
int ra = extract32(insn, 10, 5); |
3625 |
int rm = extract32(insn, 16, 5); |
3626 |
bool o0 = extract32(insn, 15, 1); |
3627 |
bool o1 = extract32(insn, 21, 1); |
3628 |
|
3629 |
switch (type) {
|
3630 |
case 0: |
3631 |
handle_fp_3src_single(s, o0, o1, rd, rn, rm, ra); |
3632 |
break;
|
3633 |
case 1: |
3634 |
handle_fp_3src_double(s, o0, o1, rd, rn, rm, ra); |
3635 |
break;
|
3636 |
default:
|
3637 |
unallocated_encoding(s); |
3638 |
} |
3639 |
} |
3640 |
|
3641 |
/* C3.6.28 Floating point immediate
|
3642 |
* 31 30 29 28 24 23 22 21 20 13 12 10 9 5 4 0
|
3643 |
* +---+---+---+-----------+------+---+------------+-------+------+------+
|
3644 |
* | M | 0 | S | 1 1 1 1 0 | type | 1 | imm8 | 1 0 0 | imm5 | Rd |
|
3645 |
* +---+---+---+-----------+------+---+------------+-------+------+------+
|
3646 |
*/
|
3647 |
static void disas_fp_imm(DisasContext *s, uint32_t insn) |
3648 |
{ |
3649 |
int rd = extract32(insn, 0, 5); |
3650 |
int imm8 = extract32(insn, 13, 8); |
3651 |
int is_double = extract32(insn, 22, 2); |
3652 |
uint64_t imm; |
3653 |
TCGv_i64 tcg_res; |
3654 |
|
3655 |
if (is_double > 1) { |
3656 |
unallocated_encoding(s); |
3657 |
return;
|
3658 |
} |
3659 |
|
3660 |
/* The imm8 encodes the sign bit, enough bits to represent
|
3661 |
* an exponent in the range 01....1xx to 10....0xx,
|
3662 |
* and the most significant 4 bits of the mantissa; see
|
3663 |
* VFPExpandImm() in the v8 ARM ARM.
|
3664 |
*/
|
3665 |
if (is_double) {
|
3666 |
imm = (extract32(imm8, 7, 1) ? 0x8000 : 0) | |
3667 |
(extract32(imm8, 6, 1) ? 0x3fc0 : 0x4000) | |
3668 |
extract32(imm8, 0, 6); |
3669 |
imm <<= 48;
|
3670 |
} else {
|
3671 |
imm = (extract32(imm8, 7, 1) ? 0x8000 : 0) | |
3672 |
(extract32(imm8, 6, 1) ? 0x3e00 : 0x4000) | |
3673 |
(extract32(imm8, 0, 6) << 3); |
3674 |
imm <<= 16;
|
3675 |
} |
3676 |
|
3677 |
tcg_res = tcg_const_i64(imm); |
3678 |
write_fp_dreg(s, rd, tcg_res); |
3679 |
tcg_temp_free_i64(tcg_res); |
3680 |
} |
3681 |
|
3682 |
/* Handle floating point <=> fixed point conversions. Note that we can
|
3683 |
* also deal with fp <=> integer conversions as a special case (scale == 64)
|
3684 |
* OPTME: consider handling that special case specially or at least skipping
|
3685 |
* the call to scalbn in the helpers for zero shifts.
|
3686 |
*/
|
3687 |
static void handle_fpfpcvt(DisasContext *s, int rd, int rn, int opcode, |
3688 |
bool itof, int rmode, int scale, int sf, int type) |
3689 |
{ |
3690 |
bool is_signed = !(opcode & 1); |
3691 |
bool is_double = type;
|
3692 |
TCGv_ptr tcg_fpstatus; |
3693 |
TCGv_i32 tcg_shift; |
3694 |
|
3695 |
tcg_fpstatus = get_fpstatus_ptr(); |
3696 |
|
3697 |
tcg_shift = tcg_const_i32(64 - scale);
|
3698 |
|
3699 |
if (itof) {
|
3700 |
TCGv_i64 tcg_int = cpu_reg(s, rn); |
3701 |
if (!sf) {
|
3702 |
TCGv_i64 tcg_extend = new_tmp_a64(s); |
3703 |
|
3704 |
if (is_signed) {
|
3705 |
tcg_gen_ext32s_i64(tcg_extend, tcg_int); |
3706 |
} else {
|
3707 |
tcg_gen_ext32u_i64(tcg_extend, tcg_int); |
3708 |
} |
3709 |
|
3710 |
tcg_int = tcg_extend; |
3711 |
} |
3712 |
|
3713 |
if (is_double) {
|
3714 |
TCGv_i64 tcg_double = tcg_temp_new_i64(); |
3715 |
if (is_signed) {
|
3716 |
gen_helper_vfp_sqtod(tcg_double, tcg_int, |
3717 |
tcg_shift, tcg_fpstatus); |
3718 |
} else {
|
3719 |
gen_helper_vfp_uqtod(tcg_double, tcg_int, |
3720 |
tcg_shift, tcg_fpstatus); |
3721 |
} |
3722 |
write_fp_dreg(s, rd, tcg_double); |
3723 |
tcg_temp_free_i64(tcg_double); |
3724 |
} else {
|
3725 |
TCGv_i32 tcg_single = tcg_temp_new_i32(); |
3726 |
if (is_signed) {
|
3727 |
gen_helper_vfp_sqtos(tcg_single, tcg_int, |
3728 |
tcg_shift, tcg_fpstatus); |
3729 |
} else {
|
3730 |
gen_helper_vfp_uqtos(tcg_single, tcg_int, |
3731 |
tcg_shift, tcg_fpstatus); |
3732 |
} |
3733 |
write_fp_sreg(s, rd, tcg_single); |
3734 |
tcg_temp_free_i32(tcg_single); |
3735 |
} |
3736 |
} else {
|
3737 |
TCGv_i64 tcg_int = cpu_reg(s, rd); |
3738 |
TCGv_i32 tcg_rmode; |
3739 |
|
3740 |
if (extract32(opcode, 2, 1)) { |
3741 |
/* There are too many rounding modes to all fit into rmode,
|
3742 |
* so FCVTA[US] is a special case.
|
3743 |
*/
|
3744 |
rmode = FPROUNDING_TIEAWAY; |
3745 |
} |
3746 |
|
3747 |
tcg_rmode = tcg_const_i32(arm_rmode_to_sf(rmode)); |
3748 |
|
3749 |
gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env); |
3750 |
|
3751 |
if (is_double) {
|
3752 |
TCGv_i64 tcg_double = read_fp_dreg(s, rn); |
3753 |
if (is_signed) {
|
3754 |
if (!sf) {
|
3755 |
gen_helper_vfp_tosld(tcg_int, tcg_double, |
3756 |
tcg_shift, tcg_fpstatus); |
3757 |
} else {
|
3758 |
gen_helper_vfp_tosqd(tcg_int, tcg_double, |
3759 |
tcg_shift, tcg_fpstatus); |
3760 |
} |
3761 |
} else {
|
3762 |
if (!sf) {
|
3763 |
gen_helper_vfp_tould(tcg_int, tcg_double, |
3764 |
tcg_shift, tcg_fpstatus); |
3765 |
} else {
|
3766 |
gen_helper_vfp_touqd(tcg_int, tcg_double, |
3767 |
tcg_shift, tcg_fpstatus); |
3768 |
} |
3769 |
} |
3770 |
tcg_temp_free_i64(tcg_double); |
3771 |
} else {
|
3772 |
TCGv_i32 tcg_single = read_fp_sreg(s, rn); |
3773 |
if (sf) {
|
3774 |
if (is_signed) {
|
3775 |
gen_helper_vfp_tosqs(tcg_int, tcg_single, |
3776 |
tcg_shift, tcg_fpstatus); |
3777 |
} else {
|
3778 |
gen_helper_vfp_touqs(tcg_int, tcg_single, |
3779 |
tcg_shift, tcg_fpstatus); |
3780 |
} |
3781 |
} else {
|
3782 |
TCGv_i32 tcg_dest = tcg_temp_new_i32(); |
3783 |
if (is_signed) {
|
3784 |
gen_helper_vfp_tosls(tcg_dest, tcg_single, |
3785 |
tcg_shift, tcg_fpstatus); |
3786 |
} else {
|
3787 |
gen_helper_vfp_touls(tcg_dest, tcg_single, |
3788 |
tcg_shift, tcg_fpstatus); |
3789 |
} |
3790 |
tcg_gen_extu_i32_i64(tcg_int, tcg_dest); |
3791 |
tcg_temp_free_i32(tcg_dest); |
3792 |
} |
3793 |
tcg_temp_free_i32(tcg_single); |
3794 |
} |
3795 |
|
3796 |
gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env); |
3797 |
tcg_temp_free_i32(tcg_rmode); |
3798 |
|
3799 |
if (!sf) {
|
3800 |
tcg_gen_ext32u_i64(tcg_int, tcg_int); |
3801 |
} |
3802 |
} |
3803 |
|
3804 |
tcg_temp_free_ptr(tcg_fpstatus); |
3805 |
tcg_temp_free_i32(tcg_shift); |
3806 |
} |
3807 |
|
3808 |
/* C3.6.29 Floating point <-> fixed point conversions
|
3809 |
* 31 30 29 28 24 23 22 21 20 19 18 16 15 10 9 5 4 0
|
3810 |
* +----+---+---+-----------+------+---+-------+--------+-------+------+------+
|
3811 |
* | sf | 0 | S | 1 1 1 1 0 | type | 0 | rmode | opcode | scale | Rn | Rd |
|
3812 |
* +----+---+---+-----------+------+---+-------+--------+-------+------+------+
|
3813 |
*/
|
3814 |
static void disas_fp_fixed_conv(DisasContext *s, uint32_t insn) |
3815 |
{ |
3816 |
int rd = extract32(insn, 0, 5); |
3817 |
int rn = extract32(insn, 5, 5); |
3818 |
int scale = extract32(insn, 10, 6); |
3819 |
int opcode = extract32(insn, 16, 3); |
3820 |
int rmode = extract32(insn, 19, 2); |
3821 |
int type = extract32(insn, 22, 2); |
3822 |
bool sbit = extract32(insn, 29, 1); |
3823 |
bool sf = extract32(insn, 31, 1); |
3824 |
bool itof;
|
3825 |
|
3826 |
if (sbit || (type > 1) |
3827 |
|| (!sf && scale < 32)) {
|
3828 |
unallocated_encoding(s); |
3829 |
return;
|
3830 |
} |
3831 |
|
3832 |
switch ((rmode << 3) | opcode) { |
3833 |
case 0x2: /* SCVTF */ |
3834 |
case 0x3: /* UCVTF */ |
3835 |
itof = true;
|
3836 |
break;
|
3837 |
case 0x18: /* FCVTZS */ |
3838 |
case 0x19: /* FCVTZU */ |
3839 |
itof = false;
|
3840 |
break;
|
3841 |
default:
|
3842 |
unallocated_encoding(s); |
3843 |
return;
|
3844 |
} |
3845 |
|
3846 |
handle_fpfpcvt(s, rd, rn, opcode, itof, FPROUNDING_ZERO, scale, sf, type); |
3847 |
} |
3848 |
|
3849 |
static void handle_fmov(DisasContext *s, int rd, int rn, int type, bool itof) |
3850 |
{ |
3851 |
/* FMOV: gpr to or from float, double, or top half of quad fp reg,
|
3852 |
* without conversion.
|
3853 |
*/
|
3854 |
|
3855 |
if (itof) {
|
3856 |
TCGv_i64 tcg_rn = cpu_reg(s, rn); |
3857 |
|
3858 |
switch (type) {
|
3859 |
case 0: |
3860 |
{ |
3861 |
/* 32 bit */
|
3862 |
TCGv_i64 tmp = tcg_temp_new_i64(); |
3863 |
tcg_gen_ext32u_i64(tmp, tcg_rn); |
3864 |
tcg_gen_st_i64(tmp, cpu_env, fp_reg_offset(rd, MO_64)); |
3865 |
tcg_gen_movi_i64(tmp, 0);
|
3866 |
tcg_gen_st_i64(tmp, cpu_env, fp_reg_hi_offset(rd)); |
3867 |
tcg_temp_free_i64(tmp); |
3868 |
break;
|
3869 |
} |
3870 |
case 1: |
3871 |
{ |
3872 |
/* 64 bit */
|
3873 |
TCGv_i64 tmp = tcg_const_i64(0);
|
3874 |
tcg_gen_st_i64(tcg_rn, cpu_env, fp_reg_offset(rd, MO_64)); |
3875 |
tcg_gen_st_i64(tmp, cpu_env, fp_reg_hi_offset(rd)); |
3876 |
tcg_temp_free_i64(tmp); |
3877 |
break;
|
3878 |
} |
3879 |
case 2: |
3880 |
/* 64 bit to top half. */
|
3881 |
tcg_gen_st_i64(tcg_rn, cpu_env, fp_reg_hi_offset(rd)); |
3882 |
break;
|
3883 |
} |
3884 |
} else {
|
3885 |
TCGv_i64 tcg_rd = cpu_reg(s, rd); |
3886 |
|
3887 |
switch (type) {
|
3888 |
case 0: |
3889 |
/* 32 bit */
|
3890 |
tcg_gen_ld32u_i64(tcg_rd, cpu_env, fp_reg_offset(rn, MO_32)); |
3891 |
break;
|
3892 |
case 1: |
3893 |
/* 64 bit */
|
3894 |
tcg_gen_ld_i64(tcg_rd, cpu_env, fp_reg_offset(rn, MO_64)); |
3895 |
break;
|
3896 |
case 2: |
3897 |
/* 64 bits from top half */
|
3898 |
tcg_gen_ld_i64(tcg_rd, cpu_env, fp_reg_hi_offset(rn)); |
3899 |
break;
|
3900 |
} |
3901 |
} |
3902 |
} |
3903 |
|
3904 |
/* C3.6.30 Floating point <-> integer conversions
|
3905 |
* 31 30 29 28 24 23 22 21 20 19 18 16 15 10 9 5 4 0
|
3906 |
* +----+---+---+-----------+------+---+-------+-----+-------------+----+----+
|
3907 |
* | sf | 0 | S | 1 1 1 1 0 | type | 0 | rmode | opc | 0 0 0 0 0 0 | Rn | Rd |
|
3908 |
* +----+---+---+-----------+------+---+-------+-----+-------------+----+----+
|
3909 |
*/
|
3910 |
static void disas_fp_int_conv(DisasContext *s, uint32_t insn) |
3911 |
{ |
3912 |
int rd = extract32(insn, 0, 5); |
3913 |
int rn = extract32(insn, 5, 5); |
3914 |
int opcode = extract32(insn, 16, 3); |
3915 |
int rmode = extract32(insn, 19, 2); |
3916 |
int type = extract32(insn, 22, 2); |
3917 |
bool sbit = extract32(insn, 29, 1); |
3918 |
bool sf = extract32(insn, 31, 1); |
3919 |
|
3920 |
if (!sbit && (rmode < 2) && (opcode > 5)) { |
3921 |
/* FMOV */
|
3922 |
bool itof = opcode & 1; |
3923 |
|
3924 |
switch (sf << 3 | type << 1 | rmode) { |
3925 |
case 0x0: /* 32 bit */ |
3926 |
case 0xa: /* 64 bit */ |
3927 |
case 0xd: /* 64 bit to top half of quad */ |
3928 |
break;
|
3929 |
default:
|
3930 |
/* all other sf/type/rmode combinations are invalid */
|
3931 |
unallocated_encoding(s); |
3932 |
break;
|
3933 |
} |
3934 |
|
3935 |
handle_fmov(s, rd, rn, type, itof); |
3936 |
} else {
|
3937 |
/* actual FP conversions */
|
3938 |
unsupported_encoding(s, insn); |
3939 |
} |
3940 |
} |
3941 |
|
3942 |
/* FP-specific subcases of table C3-6 (SIMD and FP data processing)
|
3943 |
* 31 30 29 28 25 24 0
|
3944 |
* +---+---+---+---------+-----------------------------+
|
3945 |
* | | 0 | | 1 1 1 1 | |
|
3946 |
* +---+---+---+---------+-----------------------------+
|
3947 |
*/
|
3948 |
static void disas_data_proc_fp(DisasContext *s, uint32_t insn) |
3949 |
{ |
3950 |
if (extract32(insn, 24, 1)) { |
3951 |
/* Floating point data-processing (3 source) */
|
3952 |
disas_fp_3src(s, insn); |
3953 |
} else if (extract32(insn, 21, 1) == 0) { |
3954 |
/* Floating point to fixed point conversions */
|
3955 |
disas_fp_fixed_conv(s, insn); |
3956 |
} else {
|
3957 |
switch (extract32(insn, 10, 2)) { |
3958 |
case 1: |
3959 |
/* Floating point conditional compare */
|
3960 |
disas_fp_ccomp(s, insn); |
3961 |
break;
|
3962 |
case 2: |
3963 |
/* Floating point data-processing (2 source) */
|
3964 |
disas_fp_2src(s, insn); |
3965 |
break;
|
3966 |
case 3: |
3967 |
/* Floating point conditional select */
|
3968 |
disas_fp_csel(s, insn); |
3969 |
break;
|
3970 |
case 0: |
3971 |
switch (ctz32(extract32(insn, 12, 4))) { |
3972 |
case 0: /* [15:12] == xxx1 */ |
3973 |
/* Floating point immediate */
|
3974 |
disas_fp_imm(s, insn); |
3975 |
break;
|
3976 |
case 1: /* [15:12] == xx10 */ |
3977 |
/* Floating point compare */
|
3978 |
disas_fp_compare(s, insn); |
3979 |
break;
|
3980 |
case 2: /* [15:12] == x100 */ |
3981 |
/* Floating point data-processing (1 source) */
|
3982 |
disas_fp_1src(s, insn); |
3983 |
break;
|
3984 |
case 3: /* [15:12] == 1000 */ |
3985 |
unallocated_encoding(s); |
3986 |
break;
|
3987 |
default: /* [15:12] == 0000 */ |
3988 |
/* Floating point <-> integer conversions */
|
3989 |
disas_fp_int_conv(s, insn); |
3990 |
break;
|
3991 |
} |
3992 |
break;
|
3993 |
} |
3994 |
} |
3995 |
} |
3996 |
|
3997 |
static void disas_data_proc_simd(DisasContext *s, uint32_t insn) |
3998 |
{ |
3999 |
/* Note that this is called with all non-FP cases from
|
4000 |
* table C3-6 so it must UNDEF for entries not specifically
|
4001 |
* allocated to instructions in that table.
|
4002 |
*/
|
4003 |
unsupported_encoding(s, insn); |
4004 |
} |
4005 |
|
4006 |
/* C3.6 Data processing - SIMD and floating point */
|
4007 |
static void disas_data_proc_simd_fp(DisasContext *s, uint32_t insn) |
4008 |
{ |
4009 |
if (extract32(insn, 28, 1) == 1 && extract32(insn, 30, 1) == 0) { |
4010 |
disas_data_proc_fp(s, insn); |
4011 |
} else {
|
4012 |
/* SIMD, including crypto */
|
4013 |
disas_data_proc_simd(s, insn); |
4014 |
} |
4015 |
} |
4016 |
|
4017 |
/* C3.1 A64 instruction index by encoding */
|
4018 |
static void disas_a64_insn(CPUARMState *env, DisasContext *s) |
4019 |
{ |
4020 |
uint32_t insn; |
4021 |
|
4022 |
insn = arm_ldl_code(env, s->pc, s->bswap_code); |
4023 |
s->insn = insn; |
4024 |
s->pc += 4;
|
4025 |
|
4026 |
switch (extract32(insn, 25, 4)) { |
4027 |
case 0x0: case 0x1: case 0x2: case 0x3: /* UNALLOCATED */ |
4028 |
unallocated_encoding(s); |
4029 |
break;
|
4030 |
case 0x8: case 0x9: /* Data processing - immediate */ |
4031 |
disas_data_proc_imm(s, insn); |
4032 |
break;
|
4033 |
case 0xa: case 0xb: /* Branch, exception generation and system insns */ |
4034 |
disas_b_exc_sys(s, insn); |
4035 |
break;
|
4036 |
case 0x4: |
4037 |
case 0x6: |
4038 |
case 0xc: |
4039 |
case 0xe: /* Loads and stores */ |
4040 |
disas_ldst(s, insn); |
4041 |
break;
|
4042 |
case 0x5: |
4043 |
case 0xd: /* Data processing - register */ |
4044 |
disas_data_proc_reg(s, insn); |
4045 |
break;
|
4046 |
case 0x7: |
4047 |
case 0xf: /* Data processing - SIMD and floating point */ |
4048 |
disas_data_proc_simd_fp(s, insn); |
4049 |
break;
|
4050 |
default:
|
4051 |
assert(FALSE); /* all 15 cases should be handled above */
|
4052 |
break;
|
4053 |
} |
4054 |
|
4055 |
/* if we allocated any temporaries, free them here */
|
4056 |
free_tmp_a64(s); |
4057 |
} |
4058 |
|
4059 |
void gen_intermediate_code_internal_a64(ARMCPU *cpu,
|
4060 |
TranslationBlock *tb, |
4061 |
bool search_pc)
|
4062 |
{ |
4063 |
CPUState *cs = CPU(cpu); |
4064 |
CPUARMState *env = &cpu->env; |
4065 |
DisasContext dc1, *dc = &dc1; |
4066 |
CPUBreakpoint *bp; |
4067 |
uint16_t *gen_opc_end; |
4068 |
int j, lj;
|
4069 |
target_ulong pc_start; |
4070 |
target_ulong next_page_start; |
4071 |
int num_insns;
|
4072 |
int max_insns;
|
4073 |
|
4074 |
pc_start = tb->pc; |
4075 |
|
4076 |
dc->tb = tb; |
4077 |
|
4078 |
gen_opc_end = tcg_ctx.gen_opc_buf + OPC_MAX_SIZE; |
4079 |
|
4080 |
dc->is_jmp = DISAS_NEXT; |
4081 |
dc->pc = pc_start; |
4082 |
dc->singlestep_enabled = cs->singlestep_enabled; |
4083 |
dc->condjmp = 0;
|
4084 |
|
4085 |
dc->aarch64 = 1;
|
4086 |
dc->thumb = 0;
|
4087 |
dc->bswap_code = 0;
|
4088 |
dc->condexec_mask = 0;
|
4089 |
dc->condexec_cond = 0;
|
4090 |
#if !defined(CONFIG_USER_ONLY)
|
4091 |
dc->user = 0;
|
4092 |
#endif
|
4093 |
dc->vfp_enabled = 0;
|
4094 |
dc->vec_len = 0;
|
4095 |
dc->vec_stride = 0;
|
4096 |
dc->cp_regs = cpu->cp_regs; |
4097 |
dc->current_pl = arm_current_pl(env); |
4098 |
|
4099 |
init_tmp_a64_array(dc); |
4100 |
|
4101 |
next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE; |
4102 |
lj = -1;
|
4103 |
num_insns = 0;
|
4104 |
max_insns = tb->cflags & CF_COUNT_MASK; |
4105 |
if (max_insns == 0) { |
4106 |
max_insns = CF_COUNT_MASK; |
4107 |
} |
4108 |
|
4109 |
gen_tb_start(); |
4110 |
|
4111 |
tcg_clear_temp_count(); |
4112 |
|
4113 |
do {
|
4114 |
if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
|
4115 |
QTAILQ_FOREACH(bp, &env->breakpoints, entry) { |
4116 |
if (bp->pc == dc->pc) {
|
4117 |
gen_exception_insn(dc, 0, EXCP_DEBUG);
|
4118 |
/* Advance PC so that clearing the breakpoint will
|
4119 |
invalidate this TB. */
|
4120 |
dc->pc += 2;
|
4121 |
goto done_generating;
|
4122 |
} |
4123 |
} |
4124 |
} |
4125 |
|
4126 |
if (search_pc) {
|
4127 |
j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf; |
4128 |
if (lj < j) {
|
4129 |
lj++; |
4130 |
while (lj < j) {
|
4131 |
tcg_ctx.gen_opc_instr_start[lj++] = 0;
|
4132 |
} |
4133 |
} |
4134 |
tcg_ctx.gen_opc_pc[lj] = dc->pc; |
4135 |
tcg_ctx.gen_opc_instr_start[lj] = 1;
|
4136 |
tcg_ctx.gen_opc_icount[lj] = num_insns; |
4137 |
} |
4138 |
|
4139 |
if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO)) { |
4140 |
gen_io_start(); |
4141 |
} |
4142 |
|
4143 |
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP | CPU_LOG_TB_OP_OPT))) {
|
4144 |
tcg_gen_debug_insn_start(dc->pc); |
4145 |
} |
4146 |
|
4147 |
disas_a64_insn(env, dc); |
4148 |
|
4149 |
if (tcg_check_temp_count()) {
|
4150 |
fprintf(stderr, "TCG temporary leak before "TARGET_FMT_lx"\n", |
4151 |
dc->pc); |
4152 |
} |
4153 |
|
4154 |
/* Translation stops when a conditional branch is encountered.
|
4155 |
* Otherwise the subsequent code could get translated several times.
|
4156 |
* Also stop translation when a page boundary is reached. This
|
4157 |
* ensures prefetch aborts occur at the right place.
|
4158 |
*/
|
4159 |
num_insns++; |
4160 |
} while (!dc->is_jmp && tcg_ctx.gen_opc_ptr < gen_opc_end &&
|
4161 |
!cs->singlestep_enabled && |
4162 |
!singlestep && |
4163 |
dc->pc < next_page_start && |
4164 |
num_insns < max_insns); |
4165 |
|
4166 |
if (tb->cflags & CF_LAST_IO) {
|
4167 |
gen_io_end(); |
4168 |
} |
4169 |
|
4170 |
if (unlikely(cs->singlestep_enabled) && dc->is_jmp != DISAS_EXC) {
|
4171 |
/* Note that this means single stepping WFI doesn't halt the CPU.
|
4172 |
* For conditional branch insns this is harmless unreachable code as
|
4173 |
* gen_goto_tb() has already handled emitting the debug exception
|
4174 |
* (and thus a tb-jump is not possible when singlestepping).
|
4175 |
*/
|
4176 |
assert(dc->is_jmp != DISAS_TB_JUMP); |
4177 |
if (dc->is_jmp != DISAS_JUMP) {
|
4178 |
gen_a64_set_pc_im(dc->pc); |
4179 |
} |
4180 |
gen_exception(EXCP_DEBUG); |
4181 |
} else {
|
4182 |
switch (dc->is_jmp) {
|
4183 |
case DISAS_NEXT:
|
4184 |
gen_goto_tb(dc, 1, dc->pc);
|
4185 |
break;
|
4186 |
default:
|
4187 |
case DISAS_UPDATE:
|
4188 |
gen_a64_set_pc_im(dc->pc); |
4189 |
/* fall through */
|
4190 |
case DISAS_JUMP:
|
4191 |
/* indicate that the hash table must be used to find the next TB */
|
4192 |
tcg_gen_exit_tb(0);
|
4193 |
break;
|
4194 |
case DISAS_TB_JUMP:
|
4195 |
case DISAS_EXC:
|
4196 |
case DISAS_SWI:
|
4197 |
break;
|
4198 |
case DISAS_WFI:
|
4199 |
/* This is a special case because we don't want to just halt the CPU
|
4200 |
* if trying to debug across a WFI.
|
4201 |
*/
|
4202 |
gen_helper_wfi(cpu_env); |
4203 |
break;
|
4204 |
} |
4205 |
} |
4206 |
|
4207 |
done_generating:
|
4208 |
gen_tb_end(tb, num_insns); |
4209 |
*tcg_ctx.gen_opc_ptr = INDEX_op_end; |
4210 |
|
4211 |
#ifdef DEBUG_DISAS
|
4212 |
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
|
4213 |
qemu_log("----------------\n");
|
4214 |
qemu_log("IN: %s\n", lookup_symbol(pc_start));
|
4215 |
log_target_disas(env, pc_start, dc->pc - pc_start, |
4216 |
dc->thumb | (dc->bswap_code << 1));
|
4217 |
qemu_log("\n");
|
4218 |
} |
4219 |
#endif
|
4220 |
if (search_pc) {
|
4221 |
j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf; |
4222 |
lj++; |
4223 |
while (lj <= j) {
|
4224 |
tcg_ctx.gen_opc_instr_start[lj++] = 0;
|
4225 |
} |
4226 |
} else {
|
4227 |
tb->size = dc->pc - pc_start; |
4228 |
tb->icount = num_insns; |
4229 |
} |
4230 |
} |