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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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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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} |
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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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} |
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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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/* 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) |
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{ |
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TCGv_i64 flag = tcg_temp_new_i64(); |
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tcg_gen_setcondi_i64(TCG_COND_NE, flag, result, 0);
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tcg_gen_trunc_i64_i32(cpu_ZF, flag); |
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tcg_gen_shri_i64(flag, result, 32);
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tcg_gen_trunc_i64_i32(cpu_NF, flag); |
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tcg_temp_free_i64(flag); |
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} |
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/* Set NZCV as for a logical operation: NZ as per result, CV cleared. */
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static inline void gen_logic_CC(int sf, TCGv_i64 result) |
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{ |
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if (sf) {
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gen_set_NZ64(result); |
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} else {
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tcg_gen_trunc_i64_i32(cpu_ZF, result); |
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tcg_gen_trunc_i64_i32(cpu_NF, result); |
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} |
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tcg_gen_movi_i32(cpu_CF, 0);
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tcg_gen_movi_i32(cpu_VF, 0);
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} |
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/*
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* Load/Store generators
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*/
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/*
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* Store from GPR register to memory
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*/
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static void do_gpr_st(DisasContext *s, TCGv_i64 source, |
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TCGv_i64 tcg_addr, int size)
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{ |
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g_assert(size <= 3);
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tcg_gen_qemu_st_i64(source, tcg_addr, get_mem_index(s), MO_TE + size); |
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} |
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/*
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* Load from memory to GPR register
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*/
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static void do_gpr_ld(DisasContext *s, TCGv_i64 dest, TCGv_i64 tcg_addr, |
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int size, bool is_signed, bool extend) |
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{ |
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TCGMemOp memop = MO_TE + size; |
321 |
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g_assert(size <= 3);
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if (is_signed) {
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memop += MO_SIGN; |
326 |
} |
327 |
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tcg_gen_qemu_ld_i64(dest, tcg_addr, get_mem_index(s), memop); |
329 |
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if (extend && is_signed) {
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g_assert(size < 3);
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tcg_gen_ext32u_i64(dest, dest); |
333 |
} |
334 |
} |
335 |
|
336 |
/*
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* Store from FP register to memory
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*/
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static void do_fp_st(DisasContext *s, int srcidx, TCGv_i64 tcg_addr, int size) |
340 |
{ |
341 |
/* This writes the bottom N bits of a 128 bit wide vector to memory */
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int freg_offs = offsetof(CPUARMState, vfp.regs[srcidx * 2]); |
343 |
TCGv_i64 tmp = tcg_temp_new_i64(); |
344 |
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345 |
if (size < 4) { |
346 |
switch (size) {
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347 |
case 0: |
348 |
tcg_gen_ld8u_i64(tmp, cpu_env, freg_offs); |
349 |
break;
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350 |
case 1: |
351 |
tcg_gen_ld16u_i64(tmp, cpu_env, freg_offs); |
352 |
break;
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case 2: |
354 |
tcg_gen_ld32u_i64(tmp, cpu_env, freg_offs); |
355 |
break;
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356 |
case 3: |
357 |
tcg_gen_ld_i64(tmp, cpu_env, freg_offs); |
358 |
break;
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359 |
} |
360 |
tcg_gen_qemu_st_i64(tmp, tcg_addr, get_mem_index(s), MO_TE + size); |
361 |
} else {
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362 |
TCGv_i64 tcg_hiaddr = tcg_temp_new_i64(); |
363 |
tcg_gen_ld_i64(tmp, cpu_env, freg_offs); |
364 |
tcg_gen_qemu_st_i64(tmp, tcg_addr, get_mem_index(s), MO_TEQ); |
365 |
tcg_gen_qemu_st64(tmp, tcg_addr, get_mem_index(s)); |
366 |
tcg_gen_ld_i64(tmp, cpu_env, freg_offs + sizeof(float64));
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367 |
tcg_gen_addi_i64(tcg_hiaddr, tcg_addr, 8);
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368 |
tcg_gen_qemu_st_i64(tmp, tcg_hiaddr, get_mem_index(s), MO_TEQ); |
369 |
tcg_temp_free_i64(tcg_hiaddr); |
370 |
} |
371 |
|
372 |
tcg_temp_free_i64(tmp); |
373 |
} |
374 |
|
375 |
/*
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376 |
* Load from memory to FP register
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377 |
*/
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378 |
static void do_fp_ld(DisasContext *s, int destidx, TCGv_i64 tcg_addr, int size) |
379 |
{ |
380 |
/* This always zero-extends and writes to a full 128 bit wide vector */
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381 |
int freg_offs = offsetof(CPUARMState, vfp.regs[destidx * 2]); |
382 |
TCGv_i64 tmplo = tcg_temp_new_i64(); |
383 |
TCGv_i64 tmphi; |
384 |
|
385 |
if (size < 4) { |
386 |
TCGMemOp memop = MO_TE + size; |
387 |
tmphi = tcg_const_i64(0);
|
388 |
tcg_gen_qemu_ld_i64(tmplo, tcg_addr, get_mem_index(s), memop); |
389 |
} else {
|
390 |
TCGv_i64 tcg_hiaddr; |
391 |
tmphi = tcg_temp_new_i64(); |
392 |
tcg_hiaddr = tcg_temp_new_i64(); |
393 |
|
394 |
tcg_gen_qemu_ld_i64(tmplo, tcg_addr, get_mem_index(s), MO_TEQ); |
395 |
tcg_gen_addi_i64(tcg_hiaddr, tcg_addr, 8);
|
396 |
tcg_gen_qemu_ld_i64(tmphi, tcg_hiaddr, get_mem_index(s), MO_TEQ); |
397 |
tcg_temp_free_i64(tcg_hiaddr); |
398 |
} |
399 |
|
400 |
tcg_gen_st_i64(tmplo, cpu_env, freg_offs); |
401 |
tcg_gen_st_i64(tmphi, cpu_env, freg_offs + sizeof(float64));
|
402 |
|
403 |
tcg_temp_free_i64(tmplo); |
404 |
tcg_temp_free_i64(tmphi); |
405 |
} |
406 |
|
407 |
/*
|
408 |
* This utility function is for doing register extension with an
|
409 |
* optional shift. You will likely want to pass a temporary for the
|
410 |
* destination register. See DecodeRegExtend() in the ARM ARM.
|
411 |
*/
|
412 |
static void ext_and_shift_reg(TCGv_i64 tcg_out, TCGv_i64 tcg_in, |
413 |
int option, unsigned int shift) |
414 |
{ |
415 |
int extsize = extract32(option, 0, 2); |
416 |
bool is_signed = extract32(option, 2, 1); |
417 |
|
418 |
if (is_signed) {
|
419 |
switch (extsize) {
|
420 |
case 0: |
421 |
tcg_gen_ext8s_i64(tcg_out, tcg_in); |
422 |
break;
|
423 |
case 1: |
424 |
tcg_gen_ext16s_i64(tcg_out, tcg_in); |
425 |
break;
|
426 |
case 2: |
427 |
tcg_gen_ext32s_i64(tcg_out, tcg_in); |
428 |
break;
|
429 |
case 3: |
430 |
tcg_gen_mov_i64(tcg_out, tcg_in); |
431 |
break;
|
432 |
} |
433 |
} else {
|
434 |
switch (extsize) {
|
435 |
case 0: |
436 |
tcg_gen_ext8u_i64(tcg_out, tcg_in); |
437 |
break;
|
438 |
case 1: |
439 |
tcg_gen_ext16u_i64(tcg_out, tcg_in); |
440 |
break;
|
441 |
case 2: |
442 |
tcg_gen_ext32u_i64(tcg_out, tcg_in); |
443 |
break;
|
444 |
case 3: |
445 |
tcg_gen_mov_i64(tcg_out, tcg_in); |
446 |
break;
|
447 |
} |
448 |
} |
449 |
|
450 |
if (shift) {
|
451 |
tcg_gen_shli_i64(tcg_out, tcg_out, shift); |
452 |
} |
453 |
} |
454 |
|
455 |
static inline void gen_check_sp_alignment(DisasContext *s) |
456 |
{ |
457 |
/* The AArch64 architecture mandates that (if enabled via PSTATE
|
458 |
* or SCTLR bits) there is a check that SP is 16-aligned on every
|
459 |
* SP-relative load or store (with an exception generated if it is not).
|
460 |
* In line with general QEMU practice regarding misaligned accesses,
|
461 |
* we omit these checks for the sake of guest program performance.
|
462 |
* This function is provided as a hook so we can more easily add these
|
463 |
* checks in future (possibly as a "favour catching guest program bugs
|
464 |
* over speed" user selectable option).
|
465 |
*/
|
466 |
} |
467 |
|
468 |
/*
|
469 |
* the instruction disassembly implemented here matches
|
470 |
* the instruction encoding classifications in chapter 3 (C3)
|
471 |
* of the ARM Architecture Reference Manual (DDI0487A_a)
|
472 |
*/
|
473 |
|
474 |
/* C3.2.7 Unconditional branch (immediate)
|
475 |
* 31 30 26 25 0
|
476 |
* +----+-----------+-------------------------------------+
|
477 |
* | op | 0 0 1 0 1 | imm26 |
|
478 |
* +----+-----------+-------------------------------------+
|
479 |
*/
|
480 |
static void disas_uncond_b_imm(DisasContext *s, uint32_t insn) |
481 |
{ |
482 |
uint64_t addr = s->pc + sextract32(insn, 0, 26) * 4 - 4; |
483 |
|
484 |
if (insn & (1 << 31)) { |
485 |
/* C5.6.26 BL Branch with link */
|
486 |
tcg_gen_movi_i64(cpu_reg(s, 30), s->pc);
|
487 |
} |
488 |
|
489 |
/* C5.6.20 B Branch / C5.6.26 BL Branch with link */
|
490 |
gen_goto_tb(s, 0, addr);
|
491 |
} |
492 |
|
493 |
/* C3.2.1 Compare & branch (immediate)
|
494 |
* 31 30 25 24 23 5 4 0
|
495 |
* +----+-------------+----+---------------------+--------+
|
496 |
* | sf | 0 1 1 0 1 0 | op | imm19 | Rt |
|
497 |
* +----+-------------+----+---------------------+--------+
|
498 |
*/
|
499 |
static void disas_comp_b_imm(DisasContext *s, uint32_t insn) |
500 |
{ |
501 |
unsigned int sf, op, rt; |
502 |
uint64_t addr; |
503 |
int label_match;
|
504 |
TCGv_i64 tcg_cmp; |
505 |
|
506 |
sf = extract32(insn, 31, 1); |
507 |
op = extract32(insn, 24, 1); /* 0: CBZ; 1: CBNZ */ |
508 |
rt = extract32(insn, 0, 5); |
509 |
addr = s->pc + sextract32(insn, 5, 19) * 4 - 4; |
510 |
|
511 |
tcg_cmp = read_cpu_reg(s, rt, sf); |
512 |
label_match = gen_new_label(); |
513 |
|
514 |
tcg_gen_brcondi_i64(op ? TCG_COND_NE : TCG_COND_EQ, |
515 |
tcg_cmp, 0, label_match);
|
516 |
|
517 |
gen_goto_tb(s, 0, s->pc);
|
518 |
gen_set_label(label_match); |
519 |
gen_goto_tb(s, 1, addr);
|
520 |
} |
521 |
|
522 |
/* C3.2.5 Test & branch (immediate)
|
523 |
* 31 30 25 24 23 19 18 5 4 0
|
524 |
* +----+-------------+----+-------+-------------+------+
|
525 |
* | b5 | 0 1 1 0 1 1 | op | b40 | imm14 | Rt |
|
526 |
* +----+-------------+----+-------+-------------+------+
|
527 |
*/
|
528 |
static void disas_test_b_imm(DisasContext *s, uint32_t insn) |
529 |
{ |
530 |
unsigned int bit_pos, op, rt; |
531 |
uint64_t addr; |
532 |
int label_match;
|
533 |
TCGv_i64 tcg_cmp; |
534 |
|
535 |
bit_pos = (extract32(insn, 31, 1) << 5) | extract32(insn, 19, 5); |
536 |
op = extract32(insn, 24, 1); /* 0: TBZ; 1: TBNZ */ |
537 |
addr = s->pc + sextract32(insn, 5, 14) * 4 - 4; |
538 |
rt = extract32(insn, 0, 5); |
539 |
|
540 |
tcg_cmp = tcg_temp_new_i64(); |
541 |
tcg_gen_andi_i64(tcg_cmp, cpu_reg(s, rt), (1ULL << bit_pos));
|
542 |
label_match = gen_new_label(); |
543 |
tcg_gen_brcondi_i64(op ? TCG_COND_NE : TCG_COND_EQ, |
544 |
tcg_cmp, 0, label_match);
|
545 |
tcg_temp_free_i64(tcg_cmp); |
546 |
gen_goto_tb(s, 0, s->pc);
|
547 |
gen_set_label(label_match); |
548 |
gen_goto_tb(s, 1, addr);
|
549 |
} |
550 |
|
551 |
/* C3.2.2 / C5.6.19 Conditional branch (immediate)
|
552 |
* 31 25 24 23 5 4 3 0
|
553 |
* +---------------+----+---------------------+----+------+
|
554 |
* | 0 1 0 1 0 1 0 | o1 | imm19 | o0 | cond |
|
555 |
* +---------------+----+---------------------+----+------+
|
556 |
*/
|
557 |
static void disas_cond_b_imm(DisasContext *s, uint32_t insn) |
558 |
{ |
559 |
unsigned int cond; |
560 |
uint64_t addr; |
561 |
|
562 |
if ((insn & (1 << 4)) || (insn & (1 << 24))) { |
563 |
unallocated_encoding(s); |
564 |
return;
|
565 |
} |
566 |
addr = s->pc + sextract32(insn, 5, 19) * 4 - 4; |
567 |
cond = extract32(insn, 0, 4); |
568 |
|
569 |
if (cond < 0x0e) { |
570 |
/* genuinely conditional branches */
|
571 |
int label_match = gen_new_label();
|
572 |
arm_gen_test_cc(cond, label_match); |
573 |
gen_goto_tb(s, 0, s->pc);
|
574 |
gen_set_label(label_match); |
575 |
gen_goto_tb(s, 1, addr);
|
576 |
} else {
|
577 |
/* 0xe and 0xf are both "always" conditions */
|
578 |
gen_goto_tb(s, 0, addr);
|
579 |
} |
580 |
} |
581 |
|
582 |
/* C5.6.68 HINT */
|
583 |
static void handle_hint(DisasContext *s, uint32_t insn, |
584 |
unsigned int op1, unsigned int op2, unsigned int crm) |
585 |
{ |
586 |
unsigned int selector = crm << 3 | op2; |
587 |
|
588 |
if (op1 != 3) { |
589 |
unallocated_encoding(s); |
590 |
return;
|
591 |
} |
592 |
|
593 |
switch (selector) {
|
594 |
case 0: /* NOP */ |
595 |
return;
|
596 |
case 1: /* YIELD */ |
597 |
case 2: /* WFE */ |
598 |
case 3: /* WFI */ |
599 |
case 4: /* SEV */ |
600 |
case 5: /* SEVL */ |
601 |
/* we treat all as NOP at least for now */
|
602 |
return;
|
603 |
default:
|
604 |
/* default specified as NOP equivalent */
|
605 |
return;
|
606 |
} |
607 |
} |
608 |
|
609 |
/* CLREX, DSB, DMB, ISB */
|
610 |
static void handle_sync(DisasContext *s, uint32_t insn, |
611 |
unsigned int op1, unsigned int op2, unsigned int crm) |
612 |
{ |
613 |
if (op1 != 3) { |
614 |
unallocated_encoding(s); |
615 |
return;
|
616 |
} |
617 |
|
618 |
switch (op2) {
|
619 |
case 2: /* CLREX */ |
620 |
unsupported_encoding(s, insn); |
621 |
return;
|
622 |
case 4: /* DSB */ |
623 |
case 5: /* DMB */ |
624 |
case 6: /* ISB */ |
625 |
/* We don't emulate caches so barriers are no-ops */
|
626 |
return;
|
627 |
default:
|
628 |
unallocated_encoding(s); |
629 |
return;
|
630 |
} |
631 |
} |
632 |
|
633 |
/* C5.6.130 MSR (immediate) - move immediate to processor state field */
|
634 |
static void handle_msr_i(DisasContext *s, uint32_t insn, |
635 |
unsigned int op1, unsigned int op2, unsigned int crm) |
636 |
{ |
637 |
unsupported_encoding(s, insn); |
638 |
} |
639 |
|
640 |
/* C5.6.204 SYS */
|
641 |
static void handle_sys(DisasContext *s, uint32_t insn, unsigned int l, |
642 |
unsigned int op1, unsigned int op2, |
643 |
unsigned int crn, unsigned int crm, unsigned int rt) |
644 |
{ |
645 |
unsupported_encoding(s, insn); |
646 |
} |
647 |
|
648 |
/* C5.6.129 MRS - move from system register */
|
649 |
static void handle_mrs(DisasContext *s, uint32_t insn, unsigned int op0, |
650 |
unsigned int op1, unsigned int op2, |
651 |
unsigned int crn, unsigned int crm, unsigned int rt) |
652 |
{ |
653 |
unsupported_encoding(s, insn); |
654 |
} |
655 |
|
656 |
/* C5.6.131 MSR (register) - move to system register */
|
657 |
static void handle_msr(DisasContext *s, uint32_t insn, unsigned int op0, |
658 |
unsigned int op1, unsigned int op2, |
659 |
unsigned int crn, unsigned int crm, unsigned int rt) |
660 |
{ |
661 |
unsupported_encoding(s, insn); |
662 |
} |
663 |
|
664 |
/* C3.2.4 System
|
665 |
* 31 22 21 20 19 18 16 15 12 11 8 7 5 4 0
|
666 |
* +---------------------+---+-----+-----+-------+-------+-----+------+
|
667 |
* | 1 1 0 1 0 1 0 1 0 0 | L | op0 | op1 | CRn | CRm | op2 | Rt |
|
668 |
* +---------------------+---+-----+-----+-------+-------+-----+------+
|
669 |
*/
|
670 |
static void disas_system(DisasContext *s, uint32_t insn) |
671 |
{ |
672 |
unsigned int l, op0, op1, crn, crm, op2, rt; |
673 |
l = extract32(insn, 21, 1); |
674 |
op0 = extract32(insn, 19, 2); |
675 |
op1 = extract32(insn, 16, 3); |
676 |
crn = extract32(insn, 12, 4); |
677 |
crm = extract32(insn, 8, 4); |
678 |
op2 = extract32(insn, 5, 3); |
679 |
rt = extract32(insn, 0, 5); |
680 |
|
681 |
if (op0 == 0) { |
682 |
if (l || rt != 31) { |
683 |
unallocated_encoding(s); |
684 |
return;
|
685 |
} |
686 |
switch (crn) {
|
687 |
case 2: /* C5.6.68 HINT */ |
688 |
handle_hint(s, insn, op1, op2, crm); |
689 |
break;
|
690 |
case 3: /* CLREX, DSB, DMB, ISB */ |
691 |
handle_sync(s, insn, op1, op2, crm); |
692 |
break;
|
693 |
case 4: /* C5.6.130 MSR (immediate) */ |
694 |
handle_msr_i(s, insn, op1, op2, crm); |
695 |
break;
|
696 |
default:
|
697 |
unallocated_encoding(s); |
698 |
break;
|
699 |
} |
700 |
return;
|
701 |
} |
702 |
|
703 |
if (op0 == 1) { |
704 |
/* C5.6.204 SYS */
|
705 |
handle_sys(s, insn, l, op1, op2, crn, crm, rt); |
706 |
} else if (l) { /* op0 > 1 */ |
707 |
/* C5.6.129 MRS - move from system register */
|
708 |
handle_mrs(s, insn, op0, op1, op2, crn, crm, rt); |
709 |
} else {
|
710 |
/* C5.6.131 MSR (register) - move to system register */
|
711 |
handle_msr(s, insn, op0, op1, op2, crn, crm, rt); |
712 |
} |
713 |
} |
714 |
|
715 |
/* Exception generation */
|
716 |
static void disas_exc(DisasContext *s, uint32_t insn) |
717 |
{ |
718 |
unsupported_encoding(s, insn); |
719 |
} |
720 |
|
721 |
/* C3.2.7 Unconditional branch (register)
|
722 |
* 31 25 24 21 20 16 15 10 9 5 4 0
|
723 |
* +---------------+-------+-------+-------+------+-------+
|
724 |
* | 1 1 0 1 0 1 1 | opc | op2 | op3 | Rn | op4 |
|
725 |
* +---------------+-------+-------+-------+------+-------+
|
726 |
*/
|
727 |
static void disas_uncond_b_reg(DisasContext *s, uint32_t insn) |
728 |
{ |
729 |
unsigned int opc, op2, op3, rn, op4; |
730 |
|
731 |
opc = extract32(insn, 21, 4); |
732 |
op2 = extract32(insn, 16, 5); |
733 |
op3 = extract32(insn, 10, 6); |
734 |
rn = extract32(insn, 5, 5); |
735 |
op4 = extract32(insn, 0, 5); |
736 |
|
737 |
if (op4 != 0x0 || op3 != 0x0 || op2 != 0x1f) { |
738 |
unallocated_encoding(s); |
739 |
return;
|
740 |
} |
741 |
|
742 |
switch (opc) {
|
743 |
case 0: /* BR */ |
744 |
case 2: /* RET */ |
745 |
break;
|
746 |
case 1: /* BLR */ |
747 |
tcg_gen_movi_i64(cpu_reg(s, 30), s->pc);
|
748 |
break;
|
749 |
case 4: /* ERET */ |
750 |
case 5: /* DRPS */ |
751 |
if (rn != 0x1f) { |
752 |
unallocated_encoding(s); |
753 |
} else {
|
754 |
unsupported_encoding(s, insn); |
755 |
} |
756 |
return;
|
757 |
default:
|
758 |
unallocated_encoding(s); |
759 |
return;
|
760 |
} |
761 |
|
762 |
tcg_gen_mov_i64(cpu_pc, cpu_reg(s, rn)); |
763 |
s->is_jmp = DISAS_JUMP; |
764 |
} |
765 |
|
766 |
/* C3.2 Branches, exception generating and system instructions */
|
767 |
static void disas_b_exc_sys(DisasContext *s, uint32_t insn) |
768 |
{ |
769 |
switch (extract32(insn, 25, 7)) { |
770 |
case 0x0a: case 0x0b: |
771 |
case 0x4a: case 0x4b: /* Unconditional branch (immediate) */ |
772 |
disas_uncond_b_imm(s, insn); |
773 |
break;
|
774 |
case 0x1a: case 0x5a: /* Compare & branch (immediate) */ |
775 |
disas_comp_b_imm(s, insn); |
776 |
break;
|
777 |
case 0x1b: case 0x5b: /* Test & branch (immediate) */ |
778 |
disas_test_b_imm(s, insn); |
779 |
break;
|
780 |
case 0x2a: /* Conditional branch (immediate) */ |
781 |
disas_cond_b_imm(s, insn); |
782 |
break;
|
783 |
case 0x6a: /* Exception generation / System */ |
784 |
if (insn & (1 << 24)) { |
785 |
disas_system(s, insn); |
786 |
} else {
|
787 |
disas_exc(s, insn); |
788 |
} |
789 |
break;
|
790 |
case 0x6b: /* Unconditional branch (register) */ |
791 |
disas_uncond_b_reg(s, insn); |
792 |
break;
|
793 |
default:
|
794 |
unallocated_encoding(s); |
795 |
break;
|
796 |
} |
797 |
} |
798 |
|
799 |
/* Load/store exclusive */
|
800 |
static void disas_ldst_excl(DisasContext *s, uint32_t insn) |
801 |
{ |
802 |
unsupported_encoding(s, insn); |
803 |
} |
804 |
|
805 |
/* Load register (literal) */
|
806 |
static void disas_ld_lit(DisasContext *s, uint32_t insn) |
807 |
{ |
808 |
unsupported_encoding(s, insn); |
809 |
} |
810 |
|
811 |
/*
|
812 |
* C5.6.80 LDNP (Load Pair - non-temporal hint)
|
813 |
* C5.6.81 LDP (Load Pair - non vector)
|
814 |
* C5.6.82 LDPSW (Load Pair Signed Word - non vector)
|
815 |
* C5.6.176 STNP (Store Pair - non-temporal hint)
|
816 |
* C5.6.177 STP (Store Pair - non vector)
|
817 |
* C6.3.165 LDNP (Load Pair of SIMD&FP - non-temporal hint)
|
818 |
* C6.3.165 LDP (Load Pair of SIMD&FP)
|
819 |
* C6.3.284 STNP (Store Pair of SIMD&FP - non-temporal hint)
|
820 |
* C6.3.284 STP (Store Pair of SIMD&FP)
|
821 |
*
|
822 |
* 31 30 29 27 26 25 24 23 22 21 15 14 10 9 5 4 0
|
823 |
* +-----+-------+---+---+-------+---+-----------------------------+
|
824 |
* | opc | 1 0 1 | V | 0 | index | L | imm7 | Rt2 | Rn | Rt |
|
825 |
* +-----+-------+---+---+-------+---+-------+-------+------+------+
|
826 |
*
|
827 |
* opc: LDP/STP/LDNP/STNP 00 -> 32 bit, 10 -> 64 bit
|
828 |
* LDPSW 01
|
829 |
* LDP/STP/LDNP/STNP (SIMD) 00 -> 32 bit, 01 -> 64 bit, 10 -> 128 bit
|
830 |
* V: 0 -> GPR, 1 -> Vector
|
831 |
* idx: 00 -> signed offset with non-temporal hint, 01 -> post-index,
|
832 |
* 10 -> signed offset, 11 -> pre-index
|
833 |
* L: 0 -> Store 1 -> Load
|
834 |
*
|
835 |
* Rt, Rt2 = GPR or SIMD registers to be stored
|
836 |
* Rn = general purpose register containing address
|
837 |
* imm7 = signed offset (multiple of 4 or 8 depending on size)
|
838 |
*/
|
839 |
static void disas_ldst_pair(DisasContext *s, uint32_t insn) |
840 |
{ |
841 |
int rt = extract32(insn, 0, 5); |
842 |
int rn = extract32(insn, 5, 5); |
843 |
int rt2 = extract32(insn, 10, 5); |
844 |
int64_t offset = sextract32(insn, 15, 7); |
845 |
int index = extract32(insn, 23, 2); |
846 |
bool is_vector = extract32(insn, 26, 1); |
847 |
bool is_load = extract32(insn, 22, 1); |
848 |
int opc = extract32(insn, 30, 2); |
849 |
|
850 |
bool is_signed = false; |
851 |
bool postindex = false; |
852 |
bool wback = false; |
853 |
|
854 |
TCGv_i64 tcg_addr; /* calculated address */
|
855 |
int size;
|
856 |
|
857 |
if (opc == 3) { |
858 |
unallocated_encoding(s); |
859 |
return;
|
860 |
} |
861 |
|
862 |
if (is_vector) {
|
863 |
size = 2 + opc;
|
864 |
} else {
|
865 |
size = 2 + extract32(opc, 1, 1); |
866 |
is_signed = extract32(opc, 0, 1); |
867 |
if (!is_load && is_signed) {
|
868 |
unallocated_encoding(s); |
869 |
return;
|
870 |
} |
871 |
} |
872 |
|
873 |
switch (index) {
|
874 |
case 1: /* post-index */ |
875 |
postindex = true;
|
876 |
wback = true;
|
877 |
break;
|
878 |
case 0: |
879 |
/* signed offset with "non-temporal" hint. Since we don't emulate
|
880 |
* caches we don't care about hints to the cache system about
|
881 |
* data access patterns, and handle this identically to plain
|
882 |
* signed offset.
|
883 |
*/
|
884 |
if (is_signed) {
|
885 |
/* There is no non-temporal-hint version of LDPSW */
|
886 |
unallocated_encoding(s); |
887 |
return;
|
888 |
} |
889 |
postindex = false;
|
890 |
break;
|
891 |
case 2: /* signed offset, rn not updated */ |
892 |
postindex = false;
|
893 |
break;
|
894 |
case 3: /* pre-index */ |
895 |
postindex = false;
|
896 |
wback = true;
|
897 |
break;
|
898 |
} |
899 |
|
900 |
offset <<= size; |
901 |
|
902 |
if (rn == 31) { |
903 |
gen_check_sp_alignment(s); |
904 |
} |
905 |
|
906 |
tcg_addr = read_cpu_reg_sp(s, rn, 1);
|
907 |
|
908 |
if (!postindex) {
|
909 |
tcg_gen_addi_i64(tcg_addr, tcg_addr, offset); |
910 |
} |
911 |
|
912 |
if (is_vector) {
|
913 |
if (is_load) {
|
914 |
do_fp_ld(s, rt, tcg_addr, size); |
915 |
} else {
|
916 |
do_fp_st(s, rt, tcg_addr, size); |
917 |
} |
918 |
} else {
|
919 |
TCGv_i64 tcg_rt = cpu_reg(s, rt); |
920 |
if (is_load) {
|
921 |
do_gpr_ld(s, tcg_rt, tcg_addr, size, is_signed, false);
|
922 |
} else {
|
923 |
do_gpr_st(s, tcg_rt, tcg_addr, size); |
924 |
} |
925 |
} |
926 |
tcg_gen_addi_i64(tcg_addr, tcg_addr, 1 << size);
|
927 |
if (is_vector) {
|
928 |
if (is_load) {
|
929 |
do_fp_ld(s, rt2, tcg_addr, size); |
930 |
} else {
|
931 |
do_fp_st(s, rt2, tcg_addr, size); |
932 |
} |
933 |
} else {
|
934 |
TCGv_i64 tcg_rt2 = cpu_reg(s, rt2); |
935 |
if (is_load) {
|
936 |
do_gpr_ld(s, tcg_rt2, tcg_addr, size, is_signed, false);
|
937 |
} else {
|
938 |
do_gpr_st(s, tcg_rt2, tcg_addr, size); |
939 |
} |
940 |
} |
941 |
|
942 |
if (wback) {
|
943 |
if (postindex) {
|
944 |
tcg_gen_addi_i64(tcg_addr, tcg_addr, offset - (1 << size));
|
945 |
} else {
|
946 |
tcg_gen_subi_i64(tcg_addr, tcg_addr, 1 << size);
|
947 |
} |
948 |
tcg_gen_mov_i64(cpu_reg_sp(s, rn), tcg_addr); |
949 |
} |
950 |
} |
951 |
|
952 |
/*
|
953 |
* C3.3.8 Load/store (immediate post-indexed)
|
954 |
* C3.3.9 Load/store (immediate pre-indexed)
|
955 |
* C3.3.12 Load/store (unscaled immediate)
|
956 |
*
|
957 |
* 31 30 29 27 26 25 24 23 22 21 20 12 11 10 9 5 4 0
|
958 |
* +----+-------+---+-----+-----+---+--------+-----+------+------+
|
959 |
* |size| 1 1 1 | V | 0 0 | opc | 0 | imm9 | idx | Rn | Rt |
|
960 |
* +----+-------+---+-----+-----+---+--------+-----+------+------+
|
961 |
*
|
962 |
* idx = 01 -> post-indexed, 11 pre-indexed, 00 unscaled imm. (no writeback)
|
963 |
* V = 0 -> non-vector
|
964 |
* size: 00 -> 8 bit, 01 -> 16 bit, 10 -> 32 bit, 11 -> 64bit
|
965 |
* opc: 00 -> store, 01 -> loadu, 10 -> loads 64, 11 -> loads 32
|
966 |
*/
|
967 |
static void disas_ldst_reg_imm9(DisasContext *s, uint32_t insn) |
968 |
{ |
969 |
int rt = extract32(insn, 0, 5); |
970 |
int rn = extract32(insn, 5, 5); |
971 |
int imm9 = sextract32(insn, 12, 9); |
972 |
int opc = extract32(insn, 22, 2); |
973 |
int size = extract32(insn, 30, 2); |
974 |
int idx = extract32(insn, 10, 2); |
975 |
bool is_signed = false; |
976 |
bool is_store = false; |
977 |
bool is_extended = false; |
978 |
bool is_vector = extract32(insn, 26, 1); |
979 |
bool post_index;
|
980 |
bool writeback;
|
981 |
|
982 |
TCGv_i64 tcg_addr; |
983 |
|
984 |
if (is_vector) {
|
985 |
size |= (opc & 2) << 1; |
986 |
if (size > 4) { |
987 |
unallocated_encoding(s); |
988 |
return;
|
989 |
} |
990 |
is_store = ((opc & 1) == 0); |
991 |
} else {
|
992 |
if (size == 3 && opc == 2) { |
993 |
/* PRFM - prefetch */
|
994 |
return;
|
995 |
} |
996 |
if (opc == 3 && size > 1) { |
997 |
unallocated_encoding(s); |
998 |
return;
|
999 |
} |
1000 |
is_store = (opc == 0);
|
1001 |
is_signed = opc & (1<<1); |
1002 |
is_extended = (size < 3) && (opc & 1); |
1003 |
} |
1004 |
|
1005 |
switch (idx) {
|
1006 |
case 0: |
1007 |
post_index = false;
|
1008 |
writeback = false;
|
1009 |
break;
|
1010 |
case 1: |
1011 |
post_index = true;
|
1012 |
writeback = true;
|
1013 |
break;
|
1014 |
case 3: |
1015 |
post_index = false;
|
1016 |
writeback = true;
|
1017 |
break;
|
1018 |
case 2: |
1019 |
g_assert(false);
|
1020 |
break;
|
1021 |
} |
1022 |
|
1023 |
if (rn == 31) { |
1024 |
gen_check_sp_alignment(s); |
1025 |
} |
1026 |
tcg_addr = read_cpu_reg_sp(s, rn, 1);
|
1027 |
|
1028 |
if (!post_index) {
|
1029 |
tcg_gen_addi_i64(tcg_addr, tcg_addr, imm9); |
1030 |
} |
1031 |
|
1032 |
if (is_vector) {
|
1033 |
if (is_store) {
|
1034 |
do_fp_st(s, rt, tcg_addr, size); |
1035 |
} else {
|
1036 |
do_fp_ld(s, rt, tcg_addr, size); |
1037 |
} |
1038 |
} else {
|
1039 |
TCGv_i64 tcg_rt = cpu_reg(s, rt); |
1040 |
if (is_store) {
|
1041 |
do_gpr_st(s, tcg_rt, tcg_addr, size); |
1042 |
} else {
|
1043 |
do_gpr_ld(s, tcg_rt, tcg_addr, size, is_signed, is_extended); |
1044 |
} |
1045 |
} |
1046 |
|
1047 |
if (writeback) {
|
1048 |
TCGv_i64 tcg_rn = cpu_reg_sp(s, rn); |
1049 |
if (post_index) {
|
1050 |
tcg_gen_addi_i64(tcg_addr, tcg_addr, imm9); |
1051 |
} |
1052 |
tcg_gen_mov_i64(tcg_rn, tcg_addr); |
1053 |
} |
1054 |
} |
1055 |
|
1056 |
/*
|
1057 |
* C3.3.10 Load/store (register offset)
|
1058 |
*
|
1059 |
* 31 30 29 27 26 25 24 23 22 21 20 16 15 13 12 11 10 9 5 4 0
|
1060 |
* +----+-------+---+-----+-----+---+------+-----+--+-----+----+----+
|
1061 |
* |size| 1 1 1 | V | 0 0 | opc | 1 | Rm | opt | S| 1 0 | Rn | Rt |
|
1062 |
* +----+-------+---+-----+-----+---+------+-----+--+-----+----+----+
|
1063 |
*
|
1064 |
* For non-vector:
|
1065 |
* size: 00-> byte, 01 -> 16 bit, 10 -> 32bit, 11 -> 64bit
|
1066 |
* opc: 00 -> store, 01 -> loadu, 10 -> loads 64, 11 -> loads 32
|
1067 |
* For vector:
|
1068 |
* size is opc<1>:size<1:0> so 100 -> 128 bit; 110 and 111 unallocated
|
1069 |
* opc<0>: 0 -> store, 1 -> load
|
1070 |
* V: 1 -> vector/simd
|
1071 |
* opt: extend encoding (see DecodeRegExtend)
|
1072 |
* S: if S=1 then scale (essentially index by sizeof(size))
|
1073 |
* Rt: register to transfer into/out of
|
1074 |
* Rn: address register or SP for base
|
1075 |
* Rm: offset register or ZR for offset
|
1076 |
*/
|
1077 |
static void disas_ldst_reg_roffset(DisasContext *s, uint32_t insn) |
1078 |
{ |
1079 |
int rt = extract32(insn, 0, 5); |
1080 |
int rn = extract32(insn, 5, 5); |
1081 |
int shift = extract32(insn, 12, 1); |
1082 |
int rm = extract32(insn, 16, 5); |
1083 |
int opc = extract32(insn, 22, 2); |
1084 |
int opt = extract32(insn, 13, 3); |
1085 |
int size = extract32(insn, 30, 2); |
1086 |
bool is_signed = false; |
1087 |
bool is_store = false; |
1088 |
bool is_extended = false; |
1089 |
bool is_vector = extract32(insn, 26, 1); |
1090 |
|
1091 |
TCGv_i64 tcg_rm; |
1092 |
TCGv_i64 tcg_addr; |
1093 |
|
1094 |
if (extract32(opt, 1, 1) == 0) { |
1095 |
unallocated_encoding(s); |
1096 |
return;
|
1097 |
} |
1098 |
|
1099 |
if (is_vector) {
|
1100 |
size |= (opc & 2) << 1; |
1101 |
if (size > 4) { |
1102 |
unallocated_encoding(s); |
1103 |
return;
|
1104 |
} |
1105 |
is_store = !extract32(opc, 0, 1); |
1106 |
} else {
|
1107 |
if (size == 3 && opc == 2) { |
1108 |
/* PRFM - prefetch */
|
1109 |
return;
|
1110 |
} |
1111 |
if (opc == 3 && size > 1) { |
1112 |
unallocated_encoding(s); |
1113 |
return;
|
1114 |
} |
1115 |
is_store = (opc == 0);
|
1116 |
is_signed = extract32(opc, 1, 1); |
1117 |
is_extended = (size < 3) && extract32(opc, 0, 1); |
1118 |
} |
1119 |
|
1120 |
if (rn == 31) { |
1121 |
gen_check_sp_alignment(s); |
1122 |
} |
1123 |
tcg_addr = read_cpu_reg_sp(s, rn, 1);
|
1124 |
|
1125 |
tcg_rm = read_cpu_reg(s, rm, 1);
|
1126 |
ext_and_shift_reg(tcg_rm, tcg_rm, opt, shift ? size : 0);
|
1127 |
|
1128 |
tcg_gen_add_i64(tcg_addr, tcg_addr, tcg_rm); |
1129 |
|
1130 |
if (is_vector) {
|
1131 |
if (is_store) {
|
1132 |
do_fp_st(s, rt, tcg_addr, size); |
1133 |
} else {
|
1134 |
do_fp_ld(s, rt, tcg_addr, size); |
1135 |
} |
1136 |
} else {
|
1137 |
TCGv_i64 tcg_rt = cpu_reg(s, rt); |
1138 |
if (is_store) {
|
1139 |
do_gpr_st(s, tcg_rt, tcg_addr, size); |
1140 |
} else {
|
1141 |
do_gpr_ld(s, tcg_rt, tcg_addr, size, is_signed, is_extended); |
1142 |
} |
1143 |
} |
1144 |
} |
1145 |
|
1146 |
/*
|
1147 |
* C3.3.13 Load/store (unsigned immediate)
|
1148 |
*
|
1149 |
* 31 30 29 27 26 25 24 23 22 21 10 9 5
|
1150 |
* +----+-------+---+-----+-----+------------+-------+------+
|
1151 |
* |size| 1 1 1 | V | 0 1 | opc | imm12 | Rn | Rt |
|
1152 |
* +----+-------+---+-----+-----+------------+-------+------+
|
1153 |
*
|
1154 |
* For non-vector:
|
1155 |
* size: 00-> byte, 01 -> 16 bit, 10 -> 32bit, 11 -> 64bit
|
1156 |
* opc: 00 -> store, 01 -> loadu, 10 -> loads 64, 11 -> loads 32
|
1157 |
* For vector:
|
1158 |
* size is opc<1>:size<1:0> so 100 -> 128 bit; 110 and 111 unallocated
|
1159 |
* opc<0>: 0 -> store, 1 -> load
|
1160 |
* Rn: base address register (inc SP)
|
1161 |
* Rt: target register
|
1162 |
*/
|
1163 |
static void disas_ldst_reg_unsigned_imm(DisasContext *s, uint32_t insn) |
1164 |
{ |
1165 |
int rt = extract32(insn, 0, 5); |
1166 |
int rn = extract32(insn, 5, 5); |
1167 |
unsigned int imm12 = extract32(insn, 10, 12); |
1168 |
bool is_vector = extract32(insn, 26, 1); |
1169 |
int size = extract32(insn, 30, 2); |
1170 |
int opc = extract32(insn, 22, 2); |
1171 |
unsigned int offset; |
1172 |
|
1173 |
TCGv_i64 tcg_addr; |
1174 |
|
1175 |
bool is_store;
|
1176 |
bool is_signed = false; |
1177 |
bool is_extended = false; |
1178 |
|
1179 |
if (is_vector) {
|
1180 |
size |= (opc & 2) << 1; |
1181 |
if (size > 4) { |
1182 |
unallocated_encoding(s); |
1183 |
return;
|
1184 |
} |
1185 |
is_store = !extract32(opc, 0, 1); |
1186 |
} else {
|
1187 |
if (size == 3 && opc == 2) { |
1188 |
/* PRFM - prefetch */
|
1189 |
return;
|
1190 |
} |
1191 |
if (opc == 3 && size > 1) { |
1192 |
unallocated_encoding(s); |
1193 |
return;
|
1194 |
} |
1195 |
is_store = (opc == 0);
|
1196 |
is_signed = extract32(opc, 1, 1); |
1197 |
is_extended = (size < 3) && extract32(opc, 0, 1); |
1198 |
} |
1199 |
|
1200 |
if (rn == 31) { |
1201 |
gen_check_sp_alignment(s); |
1202 |
} |
1203 |
tcg_addr = read_cpu_reg_sp(s, rn, 1);
|
1204 |
offset = imm12 << size; |
1205 |
tcg_gen_addi_i64(tcg_addr, tcg_addr, offset); |
1206 |
|
1207 |
if (is_vector) {
|
1208 |
if (is_store) {
|
1209 |
do_fp_st(s, rt, tcg_addr, size); |
1210 |
} else {
|
1211 |
do_fp_ld(s, rt, tcg_addr, size); |
1212 |
} |
1213 |
} else {
|
1214 |
TCGv_i64 tcg_rt = cpu_reg(s, rt); |
1215 |
if (is_store) {
|
1216 |
do_gpr_st(s, tcg_rt, tcg_addr, size); |
1217 |
} else {
|
1218 |
do_gpr_ld(s, tcg_rt, tcg_addr, size, is_signed, is_extended); |
1219 |
} |
1220 |
} |
1221 |
} |
1222 |
|
1223 |
/* Load/store register (immediate forms) */
|
1224 |
static void disas_ldst_reg_imm(DisasContext *s, uint32_t insn) |
1225 |
{ |
1226 |
switch (extract32(insn, 10, 2)) { |
1227 |
case 0: case 1: case 3: |
1228 |
/* Load/store register (unscaled immediate) */
|
1229 |
/* Load/store immediate pre/post-indexed */
|
1230 |
disas_ldst_reg_imm9(s, insn); |
1231 |
break;
|
1232 |
case 2: |
1233 |
/* Load/store register unprivileged */
|
1234 |
unsupported_encoding(s, insn); |
1235 |
break;
|
1236 |
default:
|
1237 |
unallocated_encoding(s); |
1238 |
break;
|
1239 |
} |
1240 |
} |
1241 |
|
1242 |
/* Load/store register (all forms) */
|
1243 |
static void disas_ldst_reg(DisasContext *s, uint32_t insn) |
1244 |
{ |
1245 |
switch (extract32(insn, 24, 2)) { |
1246 |
case 0: |
1247 |
if (extract32(insn, 21, 1) == 1 && extract32(insn, 10, 2) == 2) { |
1248 |
disas_ldst_reg_roffset(s, insn); |
1249 |
} else {
|
1250 |
disas_ldst_reg_imm(s, insn); |
1251 |
} |
1252 |
break;
|
1253 |
case 1: |
1254 |
disas_ldst_reg_unsigned_imm(s, insn); |
1255 |
break;
|
1256 |
default:
|
1257 |
unallocated_encoding(s); |
1258 |
break;
|
1259 |
} |
1260 |
} |
1261 |
|
1262 |
/* AdvSIMD load/store multiple structures */
|
1263 |
static void disas_ldst_multiple_struct(DisasContext *s, uint32_t insn) |
1264 |
{ |
1265 |
unsupported_encoding(s, insn); |
1266 |
} |
1267 |
|
1268 |
/* AdvSIMD load/store single structure */
|
1269 |
static void disas_ldst_single_struct(DisasContext *s, uint32_t insn) |
1270 |
{ |
1271 |
unsupported_encoding(s, insn); |
1272 |
} |
1273 |
|
1274 |
/* C3.3 Loads and stores */
|
1275 |
static void disas_ldst(DisasContext *s, uint32_t insn) |
1276 |
{ |
1277 |
switch (extract32(insn, 24, 6)) { |
1278 |
case 0x08: /* Load/store exclusive */ |
1279 |
disas_ldst_excl(s, insn); |
1280 |
break;
|
1281 |
case 0x18: case 0x1c: /* Load register (literal) */ |
1282 |
disas_ld_lit(s, insn); |
1283 |
break;
|
1284 |
case 0x28: case 0x29: |
1285 |
case 0x2c: case 0x2d: /* Load/store pair (all forms) */ |
1286 |
disas_ldst_pair(s, insn); |
1287 |
break;
|
1288 |
case 0x38: case 0x39: |
1289 |
case 0x3c: case 0x3d: /* Load/store register (all forms) */ |
1290 |
disas_ldst_reg(s, insn); |
1291 |
break;
|
1292 |
case 0x0c: /* AdvSIMD load/store multiple structures */ |
1293 |
disas_ldst_multiple_struct(s, insn); |
1294 |
break;
|
1295 |
case 0x0d: /* AdvSIMD load/store single structure */ |
1296 |
disas_ldst_single_struct(s, insn); |
1297 |
break;
|
1298 |
default:
|
1299 |
unallocated_encoding(s); |
1300 |
break;
|
1301 |
} |
1302 |
} |
1303 |
|
1304 |
/* C3.4.6 PC-rel. addressing
|
1305 |
* 31 30 29 28 24 23 5 4 0
|
1306 |
* +----+-------+-----------+-------------------+------+
|
1307 |
* | op | immlo | 1 0 0 0 0 | immhi | Rd |
|
1308 |
* +----+-------+-----------+-------------------+------+
|
1309 |
*/
|
1310 |
static void disas_pc_rel_adr(DisasContext *s, uint32_t insn) |
1311 |
{ |
1312 |
unsigned int page, rd; |
1313 |
uint64_t base; |
1314 |
int64_t offset; |
1315 |
|
1316 |
page = extract32(insn, 31, 1); |
1317 |
/* SignExtend(immhi:immlo) -> offset */
|
1318 |
offset = ((int64_t)sextract32(insn, 5, 19) << 2) | extract32(insn, 29, 2); |
1319 |
rd = extract32(insn, 0, 5); |
1320 |
base = s->pc - 4;
|
1321 |
|
1322 |
if (page) {
|
1323 |
/* ADRP (page based) */
|
1324 |
base &= ~0xfff;
|
1325 |
offset <<= 12;
|
1326 |
} |
1327 |
|
1328 |
tcg_gen_movi_i64(cpu_reg(s, rd), base + offset); |
1329 |
} |
1330 |
|
1331 |
/* Add/subtract (immediate) */
|
1332 |
static void disas_add_sub_imm(DisasContext *s, uint32_t insn) |
1333 |
{ |
1334 |
unsupported_encoding(s, insn); |
1335 |
} |
1336 |
|
1337 |
/* The input should be a value in the bottom e bits (with higher
|
1338 |
* bits zero); returns that value replicated into every element
|
1339 |
* of size e in a 64 bit integer.
|
1340 |
*/
|
1341 |
static uint64_t bitfield_replicate(uint64_t mask, unsigned int e) |
1342 |
{ |
1343 |
assert(e != 0);
|
1344 |
while (e < 64) { |
1345 |
mask |= mask << e; |
1346 |
e *= 2;
|
1347 |
} |
1348 |
return mask;
|
1349 |
} |
1350 |
|
1351 |
/* Return a value with the bottom len bits set (where 0 < len <= 64) */
|
1352 |
static inline uint64_t bitmask64(unsigned int length) |
1353 |
{ |
1354 |
assert(length > 0 && length <= 64); |
1355 |
return ~0ULL >> (64 - length); |
1356 |
} |
1357 |
|
1358 |
/* Simplified variant of pseudocode DecodeBitMasks() for the case where we
|
1359 |
* only require the wmask. Returns false if the imms/immr/immn are a reserved
|
1360 |
* value (ie should cause a guest UNDEF exception), and true if they are
|
1361 |
* valid, in which case the decoded bit pattern is written to result.
|
1362 |
*/
|
1363 |
static bool logic_imm_decode_wmask(uint64_t *result, unsigned int immn, |
1364 |
unsigned int imms, unsigned int immr) |
1365 |
{ |
1366 |
uint64_t mask; |
1367 |
unsigned e, levels, s, r;
|
1368 |
int len;
|
1369 |
|
1370 |
assert(immn < 2 && imms < 64 && immr < 64); |
1371 |
|
1372 |
/* The bit patterns we create here are 64 bit patterns which
|
1373 |
* are vectors of identical elements of size e = 2, 4, 8, 16, 32 or
|
1374 |
* 64 bits each. Each element contains the same value: a run
|
1375 |
* of between 1 and e-1 non-zero bits, rotated within the
|
1376 |
* element by between 0 and e-1 bits.
|
1377 |
*
|
1378 |
* The element size and run length are encoded into immn (1 bit)
|
1379 |
* and imms (6 bits) as follows:
|
1380 |
* 64 bit elements: immn = 1, imms = <length of run - 1>
|
1381 |
* 32 bit elements: immn = 0, imms = 0 : <length of run - 1>
|
1382 |
* 16 bit elements: immn = 0, imms = 10 : <length of run - 1>
|
1383 |
* 8 bit elements: immn = 0, imms = 110 : <length of run - 1>
|
1384 |
* 4 bit elements: immn = 0, imms = 1110 : <length of run - 1>
|
1385 |
* 2 bit elements: immn = 0, imms = 11110 : <length of run - 1>
|
1386 |
* Notice that immn = 0, imms = 11111x is the only combination
|
1387 |
* not covered by one of the above options; this is reserved.
|
1388 |
* Further, <length of run - 1> all-ones is a reserved pattern.
|
1389 |
*
|
1390 |
* In all cases the rotation is by immr % e (and immr is 6 bits).
|
1391 |
*/
|
1392 |
|
1393 |
/* First determine the element size */
|
1394 |
len = 31 - clz32((immn << 6) | (~imms & 0x3f)); |
1395 |
if (len < 1) { |
1396 |
/* This is the immn == 0, imms == 0x11111x case */
|
1397 |
return false; |
1398 |
} |
1399 |
e = 1 << len;
|
1400 |
|
1401 |
levels = e - 1;
|
1402 |
s = imms & levels; |
1403 |
r = immr & levels; |
1404 |
|
1405 |
if (s == levels) {
|
1406 |
/* <length of run - 1> mustn't be all-ones. */
|
1407 |
return false; |
1408 |
} |
1409 |
|
1410 |
/* Create the value of one element: s+1 set bits rotated
|
1411 |
* by r within the element (which is e bits wide)...
|
1412 |
*/
|
1413 |
mask = bitmask64(s + 1);
|
1414 |
mask = (mask >> r) | (mask << (e - r)); |
1415 |
/* ...then replicate the element over the whole 64 bit value */
|
1416 |
mask = bitfield_replicate(mask, e); |
1417 |
*result = mask; |
1418 |
return true; |
1419 |
} |
1420 |
|
1421 |
/* C3.4.4 Logical (immediate)
|
1422 |
* 31 30 29 28 23 22 21 16 15 10 9 5 4 0
|
1423 |
* +----+-----+-------------+---+------+------+------+------+
|
1424 |
* | sf | opc | 1 0 0 1 0 0 | N | immr | imms | Rn | Rd |
|
1425 |
* +----+-----+-------------+---+------+------+------+------+
|
1426 |
*/
|
1427 |
static void disas_logic_imm(DisasContext *s, uint32_t insn) |
1428 |
{ |
1429 |
unsigned int sf, opc, is_n, immr, imms, rn, rd; |
1430 |
TCGv_i64 tcg_rd, tcg_rn; |
1431 |
uint64_t wmask; |
1432 |
bool is_and = false; |
1433 |
|
1434 |
sf = extract32(insn, 31, 1); |
1435 |
opc = extract32(insn, 29, 2); |
1436 |
is_n = extract32(insn, 22, 1); |
1437 |
immr = extract32(insn, 16, 6); |
1438 |
imms = extract32(insn, 10, 6); |
1439 |
rn = extract32(insn, 5, 5); |
1440 |
rd = extract32(insn, 0, 5); |
1441 |
|
1442 |
if (!sf && is_n) {
|
1443 |
unallocated_encoding(s); |
1444 |
return;
|
1445 |
} |
1446 |
|
1447 |
if (opc == 0x3) { /* ANDS */ |
1448 |
tcg_rd = cpu_reg(s, rd); |
1449 |
} else {
|
1450 |
tcg_rd = cpu_reg_sp(s, rd); |
1451 |
} |
1452 |
tcg_rn = cpu_reg(s, rn); |
1453 |
|
1454 |
if (!logic_imm_decode_wmask(&wmask, is_n, imms, immr)) {
|
1455 |
/* some immediate field values are reserved */
|
1456 |
unallocated_encoding(s); |
1457 |
return;
|
1458 |
} |
1459 |
|
1460 |
if (!sf) {
|
1461 |
wmask &= 0xffffffff;
|
1462 |
} |
1463 |
|
1464 |
switch (opc) {
|
1465 |
case 0x3: /* ANDS */ |
1466 |
case 0x0: /* AND */ |
1467 |
tcg_gen_andi_i64(tcg_rd, tcg_rn, wmask); |
1468 |
is_and = true;
|
1469 |
break;
|
1470 |
case 0x1: /* ORR */ |
1471 |
tcg_gen_ori_i64(tcg_rd, tcg_rn, wmask); |
1472 |
break;
|
1473 |
case 0x2: /* EOR */ |
1474 |
tcg_gen_xori_i64(tcg_rd, tcg_rn, wmask); |
1475 |
break;
|
1476 |
default:
|
1477 |
assert(FALSE); /* must handle all above */
|
1478 |
break;
|
1479 |
} |
1480 |
|
1481 |
if (!sf && !is_and) {
|
1482 |
/* zero extend final result; we know we can skip this for AND
|
1483 |
* since the immediate had the high 32 bits clear.
|
1484 |
*/
|
1485 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
1486 |
} |
1487 |
|
1488 |
if (opc == 3) { /* ANDS */ |
1489 |
gen_logic_CC(sf, tcg_rd); |
1490 |
} |
1491 |
} |
1492 |
|
1493 |
/* Move wide (immediate) */
|
1494 |
static void disas_movw_imm(DisasContext *s, uint32_t insn) |
1495 |
{ |
1496 |
unsupported_encoding(s, insn); |
1497 |
} |
1498 |
|
1499 |
/* C3.4.2 Bitfield
|
1500 |
* 31 30 29 28 23 22 21 16 15 10 9 5 4 0
|
1501 |
* +----+-----+-------------+---+------+------+------+------+
|
1502 |
* | sf | opc | 1 0 0 1 1 0 | N | immr | imms | Rn | Rd |
|
1503 |
* +----+-----+-------------+---+------+------+------+------+
|
1504 |
*/
|
1505 |
static void disas_bitfield(DisasContext *s, uint32_t insn) |
1506 |
{ |
1507 |
unsigned int sf, n, opc, ri, si, rn, rd, bitsize, pos, len; |
1508 |
TCGv_i64 tcg_rd, tcg_tmp; |
1509 |
|
1510 |
sf = extract32(insn, 31, 1); |
1511 |
opc = extract32(insn, 29, 2); |
1512 |
n = extract32(insn, 22, 1); |
1513 |
ri = extract32(insn, 16, 6); |
1514 |
si = extract32(insn, 10, 6); |
1515 |
rn = extract32(insn, 5, 5); |
1516 |
rd = extract32(insn, 0, 5); |
1517 |
bitsize = sf ? 64 : 32; |
1518 |
|
1519 |
if (sf != n || ri >= bitsize || si >= bitsize || opc > 2) { |
1520 |
unallocated_encoding(s); |
1521 |
return;
|
1522 |
} |
1523 |
|
1524 |
tcg_rd = cpu_reg(s, rd); |
1525 |
tcg_tmp = read_cpu_reg(s, rn, sf); |
1526 |
|
1527 |
/* OPTME: probably worth recognizing common cases of ext{8,16,32}{u,s} */
|
1528 |
|
1529 |
if (opc != 1) { /* SBFM or UBFM */ |
1530 |
tcg_gen_movi_i64(tcg_rd, 0);
|
1531 |
} |
1532 |
|
1533 |
/* do the bit move operation */
|
1534 |
if (si >= ri) {
|
1535 |
/* Wd<s-r:0> = Wn<s:r> */
|
1536 |
tcg_gen_shri_i64(tcg_tmp, tcg_tmp, ri); |
1537 |
pos = 0;
|
1538 |
len = (si - ri) + 1;
|
1539 |
} else {
|
1540 |
/* Wd<32+s-r,32-r> = Wn<s:0> */
|
1541 |
pos = bitsize - ri; |
1542 |
len = si + 1;
|
1543 |
} |
1544 |
|
1545 |
tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_tmp, pos, len); |
1546 |
|
1547 |
if (opc == 0) { /* SBFM - sign extend the destination field */ |
1548 |
tcg_gen_shli_i64(tcg_rd, tcg_rd, 64 - (pos + len));
|
1549 |
tcg_gen_sari_i64(tcg_rd, tcg_rd, 64 - (pos + len));
|
1550 |
} |
1551 |
|
1552 |
if (!sf) { /* zero extend final result */ |
1553 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
1554 |
} |
1555 |
} |
1556 |
|
1557 |
/* C3.4.3 Extract
|
1558 |
* 31 30 29 28 23 22 21 20 16 15 10 9 5 4 0
|
1559 |
* +----+------+-------------+---+----+------+--------+------+------+
|
1560 |
* | sf | op21 | 1 0 0 1 1 1 | N | o0 | Rm | imms | Rn | Rd |
|
1561 |
* +----+------+-------------+---+----+------+--------+------+------+
|
1562 |
*/
|
1563 |
static void disas_extract(DisasContext *s, uint32_t insn) |
1564 |
{ |
1565 |
unsigned int sf, n, rm, imm, rn, rd, bitsize, op21, op0; |
1566 |
|
1567 |
sf = extract32(insn, 31, 1); |
1568 |
n = extract32(insn, 22, 1); |
1569 |
rm = extract32(insn, 16, 5); |
1570 |
imm = extract32(insn, 10, 6); |
1571 |
rn = extract32(insn, 5, 5); |
1572 |
rd = extract32(insn, 0, 5); |
1573 |
op21 = extract32(insn, 29, 2); |
1574 |
op0 = extract32(insn, 21, 1); |
1575 |
bitsize = sf ? 64 : 32; |
1576 |
|
1577 |
if (sf != n || op21 || op0 || imm >= bitsize) {
|
1578 |
unallocated_encoding(s); |
1579 |
} else {
|
1580 |
TCGv_i64 tcg_rd, tcg_rm, tcg_rn; |
1581 |
|
1582 |
tcg_rd = cpu_reg(s, rd); |
1583 |
|
1584 |
if (imm) {
|
1585 |
/* OPTME: we can special case rm==rn as a rotate */
|
1586 |
tcg_rm = read_cpu_reg(s, rm, sf); |
1587 |
tcg_rn = read_cpu_reg(s, rn, sf); |
1588 |
tcg_gen_shri_i64(tcg_rm, tcg_rm, imm); |
1589 |
tcg_gen_shli_i64(tcg_rn, tcg_rn, bitsize - imm); |
1590 |
tcg_gen_or_i64(tcg_rd, tcg_rm, tcg_rn); |
1591 |
if (!sf) {
|
1592 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
1593 |
} |
1594 |
} else {
|
1595 |
/* tcg shl_i32/shl_i64 is undefined for 32/64 bit shifts,
|
1596 |
* so an extract from bit 0 is a special case.
|
1597 |
*/
|
1598 |
if (sf) {
|
1599 |
tcg_gen_mov_i64(tcg_rd, cpu_reg(s, rm)); |
1600 |
} else {
|
1601 |
tcg_gen_ext32u_i64(tcg_rd, cpu_reg(s, rm)); |
1602 |
} |
1603 |
} |
1604 |
|
1605 |
} |
1606 |
} |
1607 |
|
1608 |
/* C3.4 Data processing - immediate */
|
1609 |
static void disas_data_proc_imm(DisasContext *s, uint32_t insn) |
1610 |
{ |
1611 |
switch (extract32(insn, 23, 6)) { |
1612 |
case 0x20: case 0x21: /* PC-rel. addressing */ |
1613 |
disas_pc_rel_adr(s, insn); |
1614 |
break;
|
1615 |
case 0x22: case 0x23: /* Add/subtract (immediate) */ |
1616 |
disas_add_sub_imm(s, insn); |
1617 |
break;
|
1618 |
case 0x24: /* Logical (immediate) */ |
1619 |
disas_logic_imm(s, insn); |
1620 |
break;
|
1621 |
case 0x25: /* Move wide (immediate) */ |
1622 |
disas_movw_imm(s, insn); |
1623 |
break;
|
1624 |
case 0x26: /* Bitfield */ |
1625 |
disas_bitfield(s, insn); |
1626 |
break;
|
1627 |
case 0x27: /* Extract */ |
1628 |
disas_extract(s, insn); |
1629 |
break;
|
1630 |
default:
|
1631 |
unallocated_encoding(s); |
1632 |
break;
|
1633 |
} |
1634 |
} |
1635 |
|
1636 |
/* Shift a TCGv src by TCGv shift_amount, put result in dst.
|
1637 |
* Note that it is the caller's responsibility to ensure that the
|
1638 |
* shift amount is in range (ie 0..31 or 0..63) and provide the ARM
|
1639 |
* mandated semantics for out of range shifts.
|
1640 |
*/
|
1641 |
static void shift_reg(TCGv_i64 dst, TCGv_i64 src, int sf, |
1642 |
enum a64_shift_type shift_type, TCGv_i64 shift_amount)
|
1643 |
{ |
1644 |
switch (shift_type) {
|
1645 |
case A64_SHIFT_TYPE_LSL:
|
1646 |
tcg_gen_shl_i64(dst, src, shift_amount); |
1647 |
break;
|
1648 |
case A64_SHIFT_TYPE_LSR:
|
1649 |
tcg_gen_shr_i64(dst, src, shift_amount); |
1650 |
break;
|
1651 |
case A64_SHIFT_TYPE_ASR:
|
1652 |
if (!sf) {
|
1653 |
tcg_gen_ext32s_i64(dst, src); |
1654 |
} |
1655 |
tcg_gen_sar_i64(dst, sf ? src : dst, shift_amount); |
1656 |
break;
|
1657 |
case A64_SHIFT_TYPE_ROR:
|
1658 |
if (sf) {
|
1659 |
tcg_gen_rotr_i64(dst, src, shift_amount); |
1660 |
} else {
|
1661 |
TCGv_i32 t0, t1; |
1662 |
t0 = tcg_temp_new_i32(); |
1663 |
t1 = tcg_temp_new_i32(); |
1664 |
tcg_gen_trunc_i64_i32(t0, src); |
1665 |
tcg_gen_trunc_i64_i32(t1, shift_amount); |
1666 |
tcg_gen_rotr_i32(t0, t0, t1); |
1667 |
tcg_gen_extu_i32_i64(dst, t0); |
1668 |
tcg_temp_free_i32(t0); |
1669 |
tcg_temp_free_i32(t1); |
1670 |
} |
1671 |
break;
|
1672 |
default:
|
1673 |
assert(FALSE); /* all shift types should be handled */
|
1674 |
break;
|
1675 |
} |
1676 |
|
1677 |
if (!sf) { /* zero extend final result */ |
1678 |
tcg_gen_ext32u_i64(dst, dst); |
1679 |
} |
1680 |
} |
1681 |
|
1682 |
/* Shift a TCGv src by immediate, put result in dst.
|
1683 |
* The shift amount must be in range (this should always be true as the
|
1684 |
* relevant instructions will UNDEF on bad shift immediates).
|
1685 |
*/
|
1686 |
static void shift_reg_imm(TCGv_i64 dst, TCGv_i64 src, int sf, |
1687 |
enum a64_shift_type shift_type, unsigned int shift_i) |
1688 |
{ |
1689 |
assert(shift_i < (sf ? 64 : 32)); |
1690 |
|
1691 |
if (shift_i == 0) { |
1692 |
tcg_gen_mov_i64(dst, src); |
1693 |
} else {
|
1694 |
TCGv_i64 shift_const; |
1695 |
|
1696 |
shift_const = tcg_const_i64(shift_i); |
1697 |
shift_reg(dst, src, sf, shift_type, shift_const); |
1698 |
tcg_temp_free_i64(shift_const); |
1699 |
} |
1700 |
} |
1701 |
|
1702 |
/* C3.5.10 Logical (shifted register)
|
1703 |
* 31 30 29 28 24 23 22 21 20 16 15 10 9 5 4 0
|
1704 |
* +----+-----+-----------+-------+---+------+--------+------+------+
|
1705 |
* | sf | opc | 0 1 0 1 0 | shift | N | Rm | imm6 | Rn | Rd |
|
1706 |
* +----+-----+-----------+-------+---+------+--------+------+------+
|
1707 |
*/
|
1708 |
static void disas_logic_reg(DisasContext *s, uint32_t insn) |
1709 |
{ |
1710 |
TCGv_i64 tcg_rd, tcg_rn, tcg_rm; |
1711 |
unsigned int sf, opc, shift_type, invert, rm, shift_amount, rn, rd; |
1712 |
|
1713 |
sf = extract32(insn, 31, 1); |
1714 |
opc = extract32(insn, 29, 2); |
1715 |
shift_type = extract32(insn, 22, 2); |
1716 |
invert = extract32(insn, 21, 1); |
1717 |
rm = extract32(insn, 16, 5); |
1718 |
shift_amount = extract32(insn, 10, 6); |
1719 |
rn = extract32(insn, 5, 5); |
1720 |
rd = extract32(insn, 0, 5); |
1721 |
|
1722 |
if (!sf && (shift_amount & (1 << 5))) { |
1723 |
unallocated_encoding(s); |
1724 |
return;
|
1725 |
} |
1726 |
|
1727 |
tcg_rd = cpu_reg(s, rd); |
1728 |
|
1729 |
if (opc == 1 && shift_amount == 0 && shift_type == 0 && rn == 31) { |
1730 |
/* Unshifted ORR and ORN with WZR/XZR is the standard encoding for
|
1731 |
* register-register MOV and MVN, so it is worth special casing.
|
1732 |
*/
|
1733 |
tcg_rm = cpu_reg(s, rm); |
1734 |
if (invert) {
|
1735 |
tcg_gen_not_i64(tcg_rd, tcg_rm); |
1736 |
if (!sf) {
|
1737 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
1738 |
} |
1739 |
} else {
|
1740 |
if (sf) {
|
1741 |
tcg_gen_mov_i64(tcg_rd, tcg_rm); |
1742 |
} else {
|
1743 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rm); |
1744 |
} |
1745 |
} |
1746 |
return;
|
1747 |
} |
1748 |
|
1749 |
tcg_rm = read_cpu_reg(s, rm, sf); |
1750 |
|
1751 |
if (shift_amount) {
|
1752 |
shift_reg_imm(tcg_rm, tcg_rm, sf, shift_type, shift_amount); |
1753 |
} |
1754 |
|
1755 |
tcg_rn = cpu_reg(s, rn); |
1756 |
|
1757 |
switch (opc | (invert << 2)) { |
1758 |
case 0: /* AND */ |
1759 |
case 3: /* ANDS */ |
1760 |
tcg_gen_and_i64(tcg_rd, tcg_rn, tcg_rm); |
1761 |
break;
|
1762 |
case 1: /* ORR */ |
1763 |
tcg_gen_or_i64(tcg_rd, tcg_rn, tcg_rm); |
1764 |
break;
|
1765 |
case 2: /* EOR */ |
1766 |
tcg_gen_xor_i64(tcg_rd, tcg_rn, tcg_rm); |
1767 |
break;
|
1768 |
case 4: /* BIC */ |
1769 |
case 7: /* BICS */ |
1770 |
tcg_gen_andc_i64(tcg_rd, tcg_rn, tcg_rm); |
1771 |
break;
|
1772 |
case 5: /* ORN */ |
1773 |
tcg_gen_orc_i64(tcg_rd, tcg_rn, tcg_rm); |
1774 |
break;
|
1775 |
case 6: /* EON */ |
1776 |
tcg_gen_eqv_i64(tcg_rd, tcg_rn, tcg_rm); |
1777 |
break;
|
1778 |
default:
|
1779 |
assert(FALSE); |
1780 |
break;
|
1781 |
} |
1782 |
|
1783 |
if (!sf) {
|
1784 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
1785 |
} |
1786 |
|
1787 |
if (opc == 3) { |
1788 |
gen_logic_CC(sf, tcg_rd); |
1789 |
} |
1790 |
} |
1791 |
|
1792 |
/* Add/subtract (extended register) */
|
1793 |
static void disas_add_sub_ext_reg(DisasContext *s, uint32_t insn) |
1794 |
{ |
1795 |
unsupported_encoding(s, insn); |
1796 |
} |
1797 |
|
1798 |
/* Add/subtract (shifted register) */
|
1799 |
static void disas_add_sub_reg(DisasContext *s, uint32_t insn) |
1800 |
{ |
1801 |
unsupported_encoding(s, insn); |
1802 |
} |
1803 |
|
1804 |
/* Data-processing (3 source) */
|
1805 |
static void disas_data_proc_3src(DisasContext *s, uint32_t insn) |
1806 |
{ |
1807 |
unsupported_encoding(s, insn); |
1808 |
} |
1809 |
|
1810 |
/* Add/subtract (with carry) */
|
1811 |
static void disas_adc_sbc(DisasContext *s, uint32_t insn) |
1812 |
{ |
1813 |
unsupported_encoding(s, insn); |
1814 |
} |
1815 |
|
1816 |
/* Conditional compare (immediate) */
|
1817 |
static void disas_cc_imm(DisasContext *s, uint32_t insn) |
1818 |
{ |
1819 |
unsupported_encoding(s, insn); |
1820 |
} |
1821 |
|
1822 |
/* Conditional compare (register) */
|
1823 |
static void disas_cc_reg(DisasContext *s, uint32_t insn) |
1824 |
{ |
1825 |
unsupported_encoding(s, insn); |
1826 |
} |
1827 |
|
1828 |
/* C3.5.6 Conditional select
|
1829 |
* 31 30 29 28 21 20 16 15 12 11 10 9 5 4 0
|
1830 |
* +----+----+---+-----------------+------+------+-----+------+------+
|
1831 |
* | sf | op | S | 1 1 0 1 0 1 0 0 | Rm | cond | op2 | Rn | Rd |
|
1832 |
* +----+----+---+-----------------+------+------+-----+------+------+
|
1833 |
*/
|
1834 |
static void disas_cond_select(DisasContext *s, uint32_t insn) |
1835 |
{ |
1836 |
unsigned int sf, else_inv, rm, cond, else_inc, rn, rd; |
1837 |
TCGv_i64 tcg_rd, tcg_src; |
1838 |
|
1839 |
if (extract32(insn, 29, 1) || extract32(insn, 11, 1)) { |
1840 |
/* S == 1 or op2<1> == 1 */
|
1841 |
unallocated_encoding(s); |
1842 |
return;
|
1843 |
} |
1844 |
sf = extract32(insn, 31, 1); |
1845 |
else_inv = extract32(insn, 30, 1); |
1846 |
rm = extract32(insn, 16, 5); |
1847 |
cond = extract32(insn, 12, 4); |
1848 |
else_inc = extract32(insn, 10, 1); |
1849 |
rn = extract32(insn, 5, 5); |
1850 |
rd = extract32(insn, 0, 5); |
1851 |
|
1852 |
if (rd == 31) { |
1853 |
/* silly no-op write; until we use movcond we must special-case
|
1854 |
* this to avoid a dead temporary across basic blocks.
|
1855 |
*/
|
1856 |
return;
|
1857 |
} |
1858 |
|
1859 |
tcg_rd = cpu_reg(s, rd); |
1860 |
|
1861 |
if (cond >= 0x0e) { /* condition "always" */ |
1862 |
tcg_src = read_cpu_reg(s, rn, sf); |
1863 |
tcg_gen_mov_i64(tcg_rd, tcg_src); |
1864 |
} else {
|
1865 |
/* OPTME: we could use movcond here, at the cost of duplicating
|
1866 |
* a lot of the arm_gen_test_cc() logic.
|
1867 |
*/
|
1868 |
int label_match = gen_new_label();
|
1869 |
int label_continue = gen_new_label();
|
1870 |
|
1871 |
arm_gen_test_cc(cond, label_match); |
1872 |
/* nomatch: */
|
1873 |
tcg_src = cpu_reg(s, rm); |
1874 |
|
1875 |
if (else_inv && else_inc) {
|
1876 |
tcg_gen_neg_i64(tcg_rd, tcg_src); |
1877 |
} else if (else_inv) { |
1878 |
tcg_gen_not_i64(tcg_rd, tcg_src); |
1879 |
} else if (else_inc) { |
1880 |
tcg_gen_addi_i64(tcg_rd, tcg_src, 1);
|
1881 |
} else {
|
1882 |
tcg_gen_mov_i64(tcg_rd, tcg_src); |
1883 |
} |
1884 |
if (!sf) {
|
1885 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
1886 |
} |
1887 |
tcg_gen_br(label_continue); |
1888 |
/* match: */
|
1889 |
gen_set_label(label_match); |
1890 |
tcg_src = read_cpu_reg(s, rn, sf); |
1891 |
tcg_gen_mov_i64(tcg_rd, tcg_src); |
1892 |
/* continue: */
|
1893 |
gen_set_label(label_continue); |
1894 |
} |
1895 |
} |
1896 |
|
1897 |
static void handle_clz(DisasContext *s, unsigned int sf, |
1898 |
unsigned int rn, unsigned int rd) |
1899 |
{ |
1900 |
TCGv_i64 tcg_rd, tcg_rn; |
1901 |
tcg_rd = cpu_reg(s, rd); |
1902 |
tcg_rn = cpu_reg(s, rn); |
1903 |
|
1904 |
if (sf) {
|
1905 |
gen_helper_clz64(tcg_rd, tcg_rn); |
1906 |
} else {
|
1907 |
TCGv_i32 tcg_tmp32 = tcg_temp_new_i32(); |
1908 |
tcg_gen_trunc_i64_i32(tcg_tmp32, tcg_rn); |
1909 |
gen_helper_clz(tcg_tmp32, tcg_tmp32); |
1910 |
tcg_gen_extu_i32_i64(tcg_rd, tcg_tmp32); |
1911 |
tcg_temp_free_i32(tcg_tmp32); |
1912 |
} |
1913 |
} |
1914 |
|
1915 |
static void handle_cls(DisasContext *s, unsigned int sf, |
1916 |
unsigned int rn, unsigned int rd) |
1917 |
{ |
1918 |
TCGv_i64 tcg_rd, tcg_rn; |
1919 |
tcg_rd = cpu_reg(s, rd); |
1920 |
tcg_rn = cpu_reg(s, rn); |
1921 |
|
1922 |
if (sf) {
|
1923 |
gen_helper_cls64(tcg_rd, tcg_rn); |
1924 |
} else {
|
1925 |
TCGv_i32 tcg_tmp32 = tcg_temp_new_i32(); |
1926 |
tcg_gen_trunc_i64_i32(tcg_tmp32, tcg_rn); |
1927 |
gen_helper_cls32(tcg_tmp32, tcg_tmp32); |
1928 |
tcg_gen_extu_i32_i64(tcg_rd, tcg_tmp32); |
1929 |
tcg_temp_free_i32(tcg_tmp32); |
1930 |
} |
1931 |
} |
1932 |
|
1933 |
static void handle_rbit(DisasContext *s, unsigned int sf, |
1934 |
unsigned int rn, unsigned int rd) |
1935 |
{ |
1936 |
TCGv_i64 tcg_rd, tcg_rn; |
1937 |
tcg_rd = cpu_reg(s, rd); |
1938 |
tcg_rn = cpu_reg(s, rn); |
1939 |
|
1940 |
if (sf) {
|
1941 |
gen_helper_rbit64(tcg_rd, tcg_rn); |
1942 |
} else {
|
1943 |
TCGv_i32 tcg_tmp32 = tcg_temp_new_i32(); |
1944 |
tcg_gen_trunc_i64_i32(tcg_tmp32, tcg_rn); |
1945 |
gen_helper_rbit(tcg_tmp32, tcg_tmp32); |
1946 |
tcg_gen_extu_i32_i64(tcg_rd, tcg_tmp32); |
1947 |
tcg_temp_free_i32(tcg_tmp32); |
1948 |
} |
1949 |
} |
1950 |
|
1951 |
/* C5.6.149 REV with sf==1, opcode==3 ("REV64") */
|
1952 |
static void handle_rev64(DisasContext *s, unsigned int sf, |
1953 |
unsigned int rn, unsigned int rd) |
1954 |
{ |
1955 |
if (!sf) {
|
1956 |
unallocated_encoding(s); |
1957 |
return;
|
1958 |
} |
1959 |
tcg_gen_bswap64_i64(cpu_reg(s, rd), cpu_reg(s, rn)); |
1960 |
} |
1961 |
|
1962 |
/* C5.6.149 REV with sf==0, opcode==2
|
1963 |
* C5.6.151 REV32 (sf==1, opcode==2)
|
1964 |
*/
|
1965 |
static void handle_rev32(DisasContext *s, unsigned int sf, |
1966 |
unsigned int rn, unsigned int rd) |
1967 |
{ |
1968 |
TCGv_i64 tcg_rd = cpu_reg(s, rd); |
1969 |
|
1970 |
if (sf) {
|
1971 |
TCGv_i64 tcg_tmp = tcg_temp_new_i64(); |
1972 |
TCGv_i64 tcg_rn = read_cpu_reg(s, rn, sf); |
1973 |
|
1974 |
/* bswap32_i64 requires zero high word */
|
1975 |
tcg_gen_ext32u_i64(tcg_tmp, tcg_rn); |
1976 |
tcg_gen_bswap32_i64(tcg_rd, tcg_tmp); |
1977 |
tcg_gen_shri_i64(tcg_tmp, tcg_rn, 32);
|
1978 |
tcg_gen_bswap32_i64(tcg_tmp, tcg_tmp); |
1979 |
tcg_gen_concat32_i64(tcg_rd, tcg_rd, tcg_tmp); |
1980 |
|
1981 |
tcg_temp_free_i64(tcg_tmp); |
1982 |
} else {
|
1983 |
tcg_gen_ext32u_i64(tcg_rd, cpu_reg(s, rn)); |
1984 |
tcg_gen_bswap32_i64(tcg_rd, tcg_rd); |
1985 |
} |
1986 |
} |
1987 |
|
1988 |
/* C5.6.150 REV16 (opcode==1) */
|
1989 |
static void handle_rev16(DisasContext *s, unsigned int sf, |
1990 |
unsigned int rn, unsigned int rd) |
1991 |
{ |
1992 |
TCGv_i64 tcg_rd = cpu_reg(s, rd); |
1993 |
TCGv_i64 tcg_tmp = tcg_temp_new_i64(); |
1994 |
TCGv_i64 tcg_rn = read_cpu_reg(s, rn, sf); |
1995 |
|
1996 |
tcg_gen_andi_i64(tcg_tmp, tcg_rn, 0xffff);
|
1997 |
tcg_gen_bswap16_i64(tcg_rd, tcg_tmp); |
1998 |
|
1999 |
tcg_gen_shri_i64(tcg_tmp, tcg_rn, 16);
|
2000 |
tcg_gen_andi_i64(tcg_tmp, tcg_tmp, 0xffff);
|
2001 |
tcg_gen_bswap16_i64(tcg_tmp, tcg_tmp); |
2002 |
tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_tmp, 16, 16); |
2003 |
|
2004 |
if (sf) {
|
2005 |
tcg_gen_shri_i64(tcg_tmp, tcg_rn, 32);
|
2006 |
tcg_gen_andi_i64(tcg_tmp, tcg_tmp, 0xffff);
|
2007 |
tcg_gen_bswap16_i64(tcg_tmp, tcg_tmp); |
2008 |
tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_tmp, 32, 16); |
2009 |
|
2010 |
tcg_gen_shri_i64(tcg_tmp, tcg_rn, 48);
|
2011 |
tcg_gen_bswap16_i64(tcg_tmp, tcg_tmp); |
2012 |
tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_tmp, 48, 16); |
2013 |
} |
2014 |
|
2015 |
tcg_temp_free_i64(tcg_tmp); |
2016 |
} |
2017 |
|
2018 |
/* C3.5.7 Data-processing (1 source)
|
2019 |
* 31 30 29 28 21 20 16 15 10 9 5 4 0
|
2020 |
* +----+---+---+-----------------+---------+--------+------+------+
|
2021 |
* | sf | 1 | S | 1 1 0 1 0 1 1 0 | opcode2 | opcode | Rn | Rd |
|
2022 |
* +----+---+---+-----------------+---------+--------+------+------+
|
2023 |
*/
|
2024 |
static void disas_data_proc_1src(DisasContext *s, uint32_t insn) |
2025 |
{ |
2026 |
unsigned int sf, opcode, rn, rd; |
2027 |
|
2028 |
if (extract32(insn, 29, 1) || extract32(insn, 16, 5)) { |
2029 |
unallocated_encoding(s); |
2030 |
return;
|
2031 |
} |
2032 |
|
2033 |
sf = extract32(insn, 31, 1); |
2034 |
opcode = extract32(insn, 10, 6); |
2035 |
rn = extract32(insn, 5, 5); |
2036 |
rd = extract32(insn, 0, 5); |
2037 |
|
2038 |
switch (opcode) {
|
2039 |
case 0: /* RBIT */ |
2040 |
handle_rbit(s, sf, rn, rd); |
2041 |
break;
|
2042 |
case 1: /* REV16 */ |
2043 |
handle_rev16(s, sf, rn, rd); |
2044 |
break;
|
2045 |
case 2: /* REV32 */ |
2046 |
handle_rev32(s, sf, rn, rd); |
2047 |
break;
|
2048 |
case 3: /* REV64 */ |
2049 |
handle_rev64(s, sf, rn, rd); |
2050 |
break;
|
2051 |
case 4: /* CLZ */ |
2052 |
handle_clz(s, sf, rn, rd); |
2053 |
break;
|
2054 |
case 5: /* CLS */ |
2055 |
handle_cls(s, sf, rn, rd); |
2056 |
break;
|
2057 |
} |
2058 |
} |
2059 |
|
2060 |
static void handle_div(DisasContext *s, bool is_signed, unsigned int sf, |
2061 |
unsigned int rm, unsigned int rn, unsigned int rd) |
2062 |
{ |
2063 |
TCGv_i64 tcg_n, tcg_m, tcg_rd; |
2064 |
tcg_rd = cpu_reg(s, rd); |
2065 |
|
2066 |
if (!sf && is_signed) {
|
2067 |
tcg_n = new_tmp_a64(s); |
2068 |
tcg_m = new_tmp_a64(s); |
2069 |
tcg_gen_ext32s_i64(tcg_n, cpu_reg(s, rn)); |
2070 |
tcg_gen_ext32s_i64(tcg_m, cpu_reg(s, rm)); |
2071 |
} else {
|
2072 |
tcg_n = read_cpu_reg(s, rn, sf); |
2073 |
tcg_m = read_cpu_reg(s, rm, sf); |
2074 |
} |
2075 |
|
2076 |
if (is_signed) {
|
2077 |
gen_helper_sdiv64(tcg_rd, tcg_n, tcg_m); |
2078 |
} else {
|
2079 |
gen_helper_udiv64(tcg_rd, tcg_n, tcg_m); |
2080 |
} |
2081 |
|
2082 |
if (!sf) { /* zero extend final result */ |
2083 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
2084 |
} |
2085 |
} |
2086 |
|
2087 |
/* C5.6.115 LSLV, C5.6.118 LSRV, C5.6.17 ASRV, C5.6.154 RORV */
|
2088 |
static void handle_shift_reg(DisasContext *s, |
2089 |
enum a64_shift_type shift_type, unsigned int sf, |
2090 |
unsigned int rm, unsigned int rn, unsigned int rd) |
2091 |
{ |
2092 |
TCGv_i64 tcg_shift = tcg_temp_new_i64(); |
2093 |
TCGv_i64 tcg_rd = cpu_reg(s, rd); |
2094 |
TCGv_i64 tcg_rn = read_cpu_reg(s, rn, sf); |
2095 |
|
2096 |
tcg_gen_andi_i64(tcg_shift, cpu_reg(s, rm), sf ? 63 : 31); |
2097 |
shift_reg(tcg_rd, tcg_rn, sf, shift_type, tcg_shift); |
2098 |
tcg_temp_free_i64(tcg_shift); |
2099 |
} |
2100 |
|
2101 |
/* C3.5.8 Data-processing (2 source)
|
2102 |
* 31 30 29 28 21 20 16 15 10 9 5 4 0
|
2103 |
* +----+---+---+-----------------+------+--------+------+------+
|
2104 |
* | sf | 0 | S | 1 1 0 1 0 1 1 0 | Rm | opcode | Rn | Rd |
|
2105 |
* +----+---+---+-----------------+------+--------+------+------+
|
2106 |
*/
|
2107 |
static void disas_data_proc_2src(DisasContext *s, uint32_t insn) |
2108 |
{ |
2109 |
unsigned int sf, rm, opcode, rn, rd; |
2110 |
sf = extract32(insn, 31, 1); |
2111 |
rm = extract32(insn, 16, 5); |
2112 |
opcode = extract32(insn, 10, 6); |
2113 |
rn = extract32(insn, 5, 5); |
2114 |
rd = extract32(insn, 0, 5); |
2115 |
|
2116 |
if (extract32(insn, 29, 1)) { |
2117 |
unallocated_encoding(s); |
2118 |
return;
|
2119 |
} |
2120 |
|
2121 |
switch (opcode) {
|
2122 |
case 2: /* UDIV */ |
2123 |
handle_div(s, false, sf, rm, rn, rd);
|
2124 |
break;
|
2125 |
case 3: /* SDIV */ |
2126 |
handle_div(s, true, sf, rm, rn, rd);
|
2127 |
break;
|
2128 |
case 8: /* LSLV */ |
2129 |
handle_shift_reg(s, A64_SHIFT_TYPE_LSL, sf, rm, rn, rd); |
2130 |
break;
|
2131 |
case 9: /* LSRV */ |
2132 |
handle_shift_reg(s, A64_SHIFT_TYPE_LSR, sf, rm, rn, rd); |
2133 |
break;
|
2134 |
case 10: /* ASRV */ |
2135 |
handle_shift_reg(s, A64_SHIFT_TYPE_ASR, sf, rm, rn, rd); |
2136 |
break;
|
2137 |
case 11: /* RORV */ |
2138 |
handle_shift_reg(s, A64_SHIFT_TYPE_ROR, sf, rm, rn, rd); |
2139 |
break;
|
2140 |
case 16: |
2141 |
case 17: |
2142 |
case 18: |
2143 |
case 19: |
2144 |
case 20: |
2145 |
case 21: |
2146 |
case 22: |
2147 |
case 23: /* CRC32 */ |
2148 |
unsupported_encoding(s, insn); |
2149 |
break;
|
2150 |
default:
|
2151 |
unallocated_encoding(s); |
2152 |
break;
|
2153 |
} |
2154 |
} |
2155 |
|
2156 |
/* C3.5 Data processing - register */
|
2157 |
static void disas_data_proc_reg(DisasContext *s, uint32_t insn) |
2158 |
{ |
2159 |
switch (extract32(insn, 24, 5)) { |
2160 |
case 0x0a: /* Logical (shifted register) */ |
2161 |
disas_logic_reg(s, insn); |
2162 |
break;
|
2163 |
case 0x0b: /* Add/subtract */ |
2164 |
if (insn & (1 << 21)) { /* (extended register) */ |
2165 |
disas_add_sub_ext_reg(s, insn); |
2166 |
} else {
|
2167 |
disas_add_sub_reg(s, insn); |
2168 |
} |
2169 |
break;
|
2170 |
case 0x1b: /* Data-processing (3 source) */ |
2171 |
disas_data_proc_3src(s, insn); |
2172 |
break;
|
2173 |
case 0x1a: |
2174 |
switch (extract32(insn, 21, 3)) { |
2175 |
case 0x0: /* Add/subtract (with carry) */ |
2176 |
disas_adc_sbc(s, insn); |
2177 |
break;
|
2178 |
case 0x2: /* Conditional compare */ |
2179 |
if (insn & (1 << 11)) { /* (immediate) */ |
2180 |
disas_cc_imm(s, insn); |
2181 |
} else { /* (register) */ |
2182 |
disas_cc_reg(s, insn); |
2183 |
} |
2184 |
break;
|
2185 |
case 0x4: /* Conditional select */ |
2186 |
disas_cond_select(s, insn); |
2187 |
break;
|
2188 |
case 0x6: /* Data-processing */ |
2189 |
if (insn & (1 << 30)) { /* (1 source) */ |
2190 |
disas_data_proc_1src(s, insn); |
2191 |
} else { /* (2 source) */ |
2192 |
disas_data_proc_2src(s, insn); |
2193 |
} |
2194 |
break;
|
2195 |
default:
|
2196 |
unallocated_encoding(s); |
2197 |
break;
|
2198 |
} |
2199 |
break;
|
2200 |
default:
|
2201 |
unallocated_encoding(s); |
2202 |
break;
|
2203 |
} |
2204 |
} |
2205 |
|
2206 |
/* C3.6 Data processing - SIMD and floating point */
|
2207 |
static void disas_data_proc_simd_fp(DisasContext *s, uint32_t insn) |
2208 |
{ |
2209 |
unsupported_encoding(s, insn); |
2210 |
} |
2211 |
|
2212 |
/* C3.1 A64 instruction index by encoding */
|
2213 |
static void disas_a64_insn(CPUARMState *env, DisasContext *s) |
2214 |
{ |
2215 |
uint32_t insn; |
2216 |
|
2217 |
insn = arm_ldl_code(env, s->pc, s->bswap_code); |
2218 |
s->insn = insn; |
2219 |
s->pc += 4;
|
2220 |
|
2221 |
switch (extract32(insn, 25, 4)) { |
2222 |
case 0x0: case 0x1: case 0x2: case 0x3: /* UNALLOCATED */ |
2223 |
unallocated_encoding(s); |
2224 |
break;
|
2225 |
case 0x8: case 0x9: /* Data processing - immediate */ |
2226 |
disas_data_proc_imm(s, insn); |
2227 |
break;
|
2228 |
case 0xa: case 0xb: /* Branch, exception generation and system insns */ |
2229 |
disas_b_exc_sys(s, insn); |
2230 |
break;
|
2231 |
case 0x4: |
2232 |
case 0x6: |
2233 |
case 0xc: |
2234 |
case 0xe: /* Loads and stores */ |
2235 |
disas_ldst(s, insn); |
2236 |
break;
|
2237 |
case 0x5: |
2238 |
case 0xd: /* Data processing - register */ |
2239 |
disas_data_proc_reg(s, insn); |
2240 |
break;
|
2241 |
case 0x7: |
2242 |
case 0xf: /* Data processing - SIMD and floating point */ |
2243 |
disas_data_proc_simd_fp(s, insn); |
2244 |
break;
|
2245 |
default:
|
2246 |
assert(FALSE); /* all 15 cases should be handled above */
|
2247 |
break;
|
2248 |
} |
2249 |
|
2250 |
/* if we allocated any temporaries, free them here */
|
2251 |
free_tmp_a64(s); |
2252 |
} |
2253 |
|
2254 |
void gen_intermediate_code_internal_a64(ARMCPU *cpu,
|
2255 |
TranslationBlock *tb, |
2256 |
bool search_pc)
|
2257 |
{ |
2258 |
CPUState *cs = CPU(cpu); |
2259 |
CPUARMState *env = &cpu->env; |
2260 |
DisasContext dc1, *dc = &dc1; |
2261 |
CPUBreakpoint *bp; |
2262 |
uint16_t *gen_opc_end; |
2263 |
int j, lj;
|
2264 |
target_ulong pc_start; |
2265 |
target_ulong next_page_start; |
2266 |
int num_insns;
|
2267 |
int max_insns;
|
2268 |
|
2269 |
pc_start = tb->pc; |
2270 |
|
2271 |
dc->tb = tb; |
2272 |
|
2273 |
gen_opc_end = tcg_ctx.gen_opc_buf + OPC_MAX_SIZE; |
2274 |
|
2275 |
dc->is_jmp = DISAS_NEXT; |
2276 |
dc->pc = pc_start; |
2277 |
dc->singlestep_enabled = cs->singlestep_enabled; |
2278 |
dc->condjmp = 0;
|
2279 |
|
2280 |
dc->aarch64 = 1;
|
2281 |
dc->thumb = 0;
|
2282 |
dc->bswap_code = 0;
|
2283 |
dc->condexec_mask = 0;
|
2284 |
dc->condexec_cond = 0;
|
2285 |
#if !defined(CONFIG_USER_ONLY)
|
2286 |
dc->user = 0;
|
2287 |
#endif
|
2288 |
dc->vfp_enabled = 0;
|
2289 |
dc->vec_len = 0;
|
2290 |
dc->vec_stride = 0;
|
2291 |
|
2292 |
init_tmp_a64_array(dc); |
2293 |
|
2294 |
next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE; |
2295 |
lj = -1;
|
2296 |
num_insns = 0;
|
2297 |
max_insns = tb->cflags & CF_COUNT_MASK; |
2298 |
if (max_insns == 0) { |
2299 |
max_insns = CF_COUNT_MASK; |
2300 |
} |
2301 |
|
2302 |
gen_tb_start(); |
2303 |
|
2304 |
tcg_clear_temp_count(); |
2305 |
|
2306 |
do {
|
2307 |
if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
|
2308 |
QTAILQ_FOREACH(bp, &env->breakpoints, entry) { |
2309 |
if (bp->pc == dc->pc) {
|
2310 |
gen_exception_insn(dc, 0, EXCP_DEBUG);
|
2311 |
/* Advance PC so that clearing the breakpoint will
|
2312 |
invalidate this TB. */
|
2313 |
dc->pc += 2;
|
2314 |
goto done_generating;
|
2315 |
} |
2316 |
} |
2317 |
} |
2318 |
|
2319 |
if (search_pc) {
|
2320 |
j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf; |
2321 |
if (lj < j) {
|
2322 |
lj++; |
2323 |
while (lj < j) {
|
2324 |
tcg_ctx.gen_opc_instr_start[lj++] = 0;
|
2325 |
} |
2326 |
} |
2327 |
tcg_ctx.gen_opc_pc[lj] = dc->pc; |
2328 |
tcg_ctx.gen_opc_instr_start[lj] = 1;
|
2329 |
tcg_ctx.gen_opc_icount[lj] = num_insns; |
2330 |
} |
2331 |
|
2332 |
if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO)) { |
2333 |
gen_io_start(); |
2334 |
} |
2335 |
|
2336 |
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP | CPU_LOG_TB_OP_OPT))) {
|
2337 |
tcg_gen_debug_insn_start(dc->pc); |
2338 |
} |
2339 |
|
2340 |
disas_a64_insn(env, dc); |
2341 |
|
2342 |
if (tcg_check_temp_count()) {
|
2343 |
fprintf(stderr, "TCG temporary leak before "TARGET_FMT_lx"\n", |
2344 |
dc->pc); |
2345 |
} |
2346 |
|
2347 |
/* Translation stops when a conditional branch is encountered.
|
2348 |
* Otherwise the subsequent code could get translated several times.
|
2349 |
* Also stop translation when a page boundary is reached. This
|
2350 |
* ensures prefetch aborts occur at the right place.
|
2351 |
*/
|
2352 |
num_insns++; |
2353 |
} while (!dc->is_jmp && tcg_ctx.gen_opc_ptr < gen_opc_end &&
|
2354 |
!cs->singlestep_enabled && |
2355 |
!singlestep && |
2356 |
dc->pc < next_page_start && |
2357 |
num_insns < max_insns); |
2358 |
|
2359 |
if (tb->cflags & CF_LAST_IO) {
|
2360 |
gen_io_end(); |
2361 |
} |
2362 |
|
2363 |
if (unlikely(cs->singlestep_enabled) && dc->is_jmp != DISAS_EXC) {
|
2364 |
/* Note that this means single stepping WFI doesn't halt the CPU.
|
2365 |
* For conditional branch insns this is harmless unreachable code as
|
2366 |
* gen_goto_tb() has already handled emitting the debug exception
|
2367 |
* (and thus a tb-jump is not possible when singlestepping).
|
2368 |
*/
|
2369 |
assert(dc->is_jmp != DISAS_TB_JUMP); |
2370 |
if (dc->is_jmp != DISAS_JUMP) {
|
2371 |
gen_a64_set_pc_im(dc->pc); |
2372 |
} |
2373 |
gen_exception(EXCP_DEBUG); |
2374 |
} else {
|
2375 |
switch (dc->is_jmp) {
|
2376 |
case DISAS_NEXT:
|
2377 |
gen_goto_tb(dc, 1, dc->pc);
|
2378 |
break;
|
2379 |
default:
|
2380 |
case DISAS_JUMP:
|
2381 |
case DISAS_UPDATE:
|
2382 |
/* indicate that the hash table must be used to find the next TB */
|
2383 |
tcg_gen_exit_tb(0);
|
2384 |
break;
|
2385 |
case DISAS_TB_JUMP:
|
2386 |
case DISAS_EXC:
|
2387 |
case DISAS_SWI:
|
2388 |
break;
|
2389 |
case DISAS_WFI:
|
2390 |
/* This is a special case because we don't want to just halt the CPU
|
2391 |
* if trying to debug across a WFI.
|
2392 |
*/
|
2393 |
gen_helper_wfi(cpu_env); |
2394 |
break;
|
2395 |
} |
2396 |
} |
2397 |
|
2398 |
done_generating:
|
2399 |
gen_tb_end(tb, num_insns); |
2400 |
*tcg_ctx.gen_opc_ptr = INDEX_op_end; |
2401 |
|
2402 |
#ifdef DEBUG_DISAS
|
2403 |
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
|
2404 |
qemu_log("----------------\n");
|
2405 |
qemu_log("IN: %s\n", lookup_symbol(pc_start));
|
2406 |
log_target_disas(env, pc_start, dc->pc - pc_start, |
2407 |
dc->thumb | (dc->bswap_code << 1));
|
2408 |
qemu_log("\n");
|
2409 |
} |
2410 |
#endif
|
2411 |
if (search_pc) {
|
2412 |
j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf; |
2413 |
lj++; |
2414 |
while (lj <= j) {
|
2415 |
tcg_ctx.gen_opc_instr_start[lj++] = 0;
|
2416 |
} |
2417 |
} else {
|
2418 |
tb->size = dc->pc - pc_start; |
2419 |
tb->icount = num_insns; |
2420 |
} |
2421 |
} |