root / target-arm / translate-a64.c @ d5612f10
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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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|
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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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|
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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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/*
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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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/*
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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; |
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g_assert(size <= 3);
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if (is_signed) {
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memop += MO_SIGN; |
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} |
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tcg_gen_qemu_ld_i64(dest, tcg_addr, get_mem_index(s), memop); |
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|
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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); |
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} |
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} |
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|
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/*
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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) |
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{
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/* 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]); |
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TCGv_i64 tmp = tcg_temp_new_i64(); |
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|
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if (size < 4) { |
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switch (size) {
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case 0: |
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tcg_gen_ld8u_i64(tmp, cpu_env, freg_offs); |
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break;
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case 1: |
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tcg_gen_ld16u_i64(tmp, cpu_env, freg_offs); |
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break;
|
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case 2: |
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tcg_gen_ld32u_i64(tmp, cpu_env, freg_offs); |
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break;
|
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case 3: |
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tcg_gen_ld_i64(tmp, cpu_env, freg_offs); |
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break;
|
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} |
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tcg_gen_qemu_st_i64(tmp, tcg_addr, get_mem_index(s), MO_TE + size); |
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} else {
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TCGv_i64 tcg_hiaddr = tcg_temp_new_i64(); |
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tcg_gen_ld_i64(tmp, cpu_env, freg_offs); |
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tcg_gen_qemu_st_i64(tmp, tcg_addr, get_mem_index(s), MO_TEQ); |
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tcg_gen_qemu_st64(tmp, tcg_addr, get_mem_index(s)); |
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tcg_gen_ld_i64(tmp, cpu_env, freg_offs + sizeof(float64));
|
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tcg_gen_addi_i64(tcg_hiaddr, tcg_addr, 8);
|
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tcg_gen_qemu_st_i64(tmp, tcg_hiaddr, get_mem_index(s), MO_TEQ); |
| 369 |
tcg_temp_free_i64(tcg_hiaddr); |
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} |
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|
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tcg_temp_free_i64(tmp); |
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} |
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|
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/*
|
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* Load from memory to FP register
|
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*/
|
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static void do_fp_ld(DisasContext *s, int destidx, TCGv_i64 tcg_addr, int size) |
| 379 |
{
|
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/* This always zero-extends and writes to a full 128 bit wide vector */
|
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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);
|
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tcg_gen_qemu_ld_i64(tmplo, tcg_addr, get_mem_index(s), memop); |
| 389 |
} else {
|
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TCGv_i64 tcg_hiaddr; |
| 391 |
tmphi = tcg_temp_new_i64(); |
| 392 |
tcg_hiaddr = tcg_temp_new_i64(); |
| 393 |
|
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tcg_gen_qemu_ld_i64(tmplo, tcg_addr, get_mem_index(s), MO_TEQ); |
| 395 |
tcg_gen_addi_i64(tcg_hiaddr, tcg_addr, 8);
|
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tcg_gen_qemu_ld_i64(tmphi, tcg_hiaddr, get_mem_index(s), MO_TEQ); |
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tcg_temp_free_i64(tcg_hiaddr); |
| 398 |
} |
| 399 |
|
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tcg_gen_st_i64(tmplo, cpu_env, freg_offs); |
| 401 |
tcg_gen_st_i64(tmphi, cpu_env, freg_offs + sizeof(float64));
|
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|
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tcg_temp_free_i64(tmplo); |
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tcg_temp_free_i64(tmphi); |
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} |
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|
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static inline void gen_check_sp_alignment(DisasContext *s) |
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{
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/* The AArch64 architecture mandates that (if enabled via PSTATE
|
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* or SCTLR bits) there is a check that SP is 16-aligned on every
|
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* SP-relative load or store (with an exception generated if it is not).
|
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* In line with general QEMU practice regarding misaligned accesses,
|
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* we omit these checks for the sake of guest program performance.
|
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* This function is provided as a hook so we can more easily add these
|
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* checks in future (possibly as a "favour catching guest program bugs
|
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* over speed" user selectable option).
|
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*/
|
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} |
| 419 |
|
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/*
|
| 421 |
* the instruction disassembly implemented here matches
|
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* the instruction encoding classifications in chapter 3 (C3)
|
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* of the ARM Architecture Reference Manual (DDI0487A_a)
|
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*/
|
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|
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/* C3.2.7 Unconditional branch (immediate)
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* 31 30 26 25 0
|
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* +----+-----------+-------------------------------------+
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* | op | 0 0 1 0 1 | imm26 |
|
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* +----+-----------+-------------------------------------+
|
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*/
|
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static void disas_uncond_b_imm(DisasContext *s, uint32_t insn) |
| 433 |
{
|
| 434 |
uint64_t addr = s->pc + sextract32(insn, 0, 26) * 4 - 4; |
| 435 |
|
| 436 |
if (insn & (1 << 31)) { |
| 437 |
/* C5.6.26 BL Branch with link */
|
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tcg_gen_movi_i64(cpu_reg(s, 30), s->pc);
|
| 439 |
} |
| 440 |
|
| 441 |
/* C5.6.20 B Branch / C5.6.26 BL Branch with link */
|
| 442 |
gen_goto_tb(s, 0, addr);
|
| 443 |
} |
| 444 |
|
| 445 |
/* C3.2.1 Compare & branch (immediate)
|
| 446 |
* 31 30 25 24 23 5 4 0
|
| 447 |
* +----+-------------+----+---------------------+--------+
|
| 448 |
* | sf | 0 1 1 0 1 0 | op | imm19 | Rt |
|
| 449 |
* +----+-------------+----+---------------------+--------+
|
| 450 |
*/
|
| 451 |
static void disas_comp_b_imm(DisasContext *s, uint32_t insn) |
| 452 |
{
|
| 453 |
unsigned int sf, op, rt; |
| 454 |
uint64_t addr; |
| 455 |
int label_match;
|
| 456 |
TCGv_i64 tcg_cmp; |
| 457 |
|
| 458 |
sf = extract32(insn, 31, 1); |
| 459 |
op = extract32(insn, 24, 1); /* 0: CBZ; 1: CBNZ */ |
| 460 |
rt = extract32(insn, 0, 5); |
| 461 |
addr = s->pc + sextract32(insn, 5, 19) * 4 - 4; |
| 462 |
|
| 463 |
tcg_cmp = read_cpu_reg(s, rt, sf); |
| 464 |
label_match = gen_new_label(); |
| 465 |
|
| 466 |
tcg_gen_brcondi_i64(op ? TCG_COND_NE : TCG_COND_EQ, |
| 467 |
tcg_cmp, 0, label_match);
|
| 468 |
|
| 469 |
gen_goto_tb(s, 0, s->pc);
|
| 470 |
gen_set_label(label_match); |
| 471 |
gen_goto_tb(s, 1, addr);
|
| 472 |
} |
| 473 |
|
| 474 |
/* C3.2.5 Test & branch (immediate)
|
| 475 |
* 31 30 25 24 23 19 18 5 4 0
|
| 476 |
* +----+-------------+----+-------+-------------+------+
|
| 477 |
* | b5 | 0 1 1 0 1 1 | op | b40 | imm14 | Rt |
|
| 478 |
* +----+-------------+----+-------+-------------+------+
|
| 479 |
*/
|
| 480 |
static void disas_test_b_imm(DisasContext *s, uint32_t insn) |
| 481 |
{
|
| 482 |
unsigned int bit_pos, op, rt; |
| 483 |
uint64_t addr; |
| 484 |
int label_match;
|
| 485 |
TCGv_i64 tcg_cmp; |
| 486 |
|
| 487 |
bit_pos = (extract32(insn, 31, 1) << 5) | extract32(insn, 19, 5); |
| 488 |
op = extract32(insn, 24, 1); /* 0: TBZ; 1: TBNZ */ |
| 489 |
addr = s->pc + sextract32(insn, 5, 14) * 4 - 4; |
| 490 |
rt = extract32(insn, 0, 5); |
| 491 |
|
| 492 |
tcg_cmp = tcg_temp_new_i64(); |
| 493 |
tcg_gen_andi_i64(tcg_cmp, cpu_reg(s, rt), (1ULL << bit_pos));
|
| 494 |
label_match = gen_new_label(); |
| 495 |
tcg_gen_brcondi_i64(op ? TCG_COND_NE : TCG_COND_EQ, |
| 496 |
tcg_cmp, 0, label_match);
|
| 497 |
tcg_temp_free_i64(tcg_cmp); |
| 498 |
gen_goto_tb(s, 0, s->pc);
|
| 499 |
gen_set_label(label_match); |
| 500 |
gen_goto_tb(s, 1, addr);
|
| 501 |
} |
| 502 |
|
| 503 |
/* C3.2.2 / C5.6.19 Conditional branch (immediate)
|
| 504 |
* 31 25 24 23 5 4 3 0
|
| 505 |
* +---------------+----+---------------------+----+------+
|
| 506 |
* | 0 1 0 1 0 1 0 | o1 | imm19 | o0 | cond |
|
| 507 |
* +---------------+----+---------------------+----+------+
|
| 508 |
*/
|
| 509 |
static void disas_cond_b_imm(DisasContext *s, uint32_t insn) |
| 510 |
{
|
| 511 |
unsigned int cond; |
| 512 |
uint64_t addr; |
| 513 |
|
| 514 |
if ((insn & (1 << 4)) || (insn & (1 << 24))) { |
| 515 |
unallocated_encoding(s); |
| 516 |
return;
|
| 517 |
} |
| 518 |
addr = s->pc + sextract32(insn, 5, 19) * 4 - 4; |
| 519 |
cond = extract32(insn, 0, 4); |
| 520 |
|
| 521 |
if (cond < 0x0e) { |
| 522 |
/* genuinely conditional branches */
|
| 523 |
int label_match = gen_new_label();
|
| 524 |
arm_gen_test_cc(cond, label_match); |
| 525 |
gen_goto_tb(s, 0, s->pc);
|
| 526 |
gen_set_label(label_match); |
| 527 |
gen_goto_tb(s, 1, addr);
|
| 528 |
} else {
|
| 529 |
/* 0xe and 0xf are both "always" conditions */
|
| 530 |
gen_goto_tb(s, 0, addr);
|
| 531 |
} |
| 532 |
} |
| 533 |
|
| 534 |
/* C5.6.68 HINT */
|
| 535 |
static void handle_hint(DisasContext *s, uint32_t insn, |
| 536 |
unsigned int op1, unsigned int op2, unsigned int crm) |
| 537 |
{
|
| 538 |
unsigned int selector = crm << 3 | op2; |
| 539 |
|
| 540 |
if (op1 != 3) { |
| 541 |
unallocated_encoding(s); |
| 542 |
return;
|
| 543 |
} |
| 544 |
|
| 545 |
switch (selector) {
|
| 546 |
case 0: /* NOP */ |
| 547 |
return;
|
| 548 |
case 1: /* YIELD */ |
| 549 |
case 2: /* WFE */ |
| 550 |
case 3: /* WFI */ |
| 551 |
case 4: /* SEV */ |
| 552 |
case 5: /* SEVL */ |
| 553 |
/* we treat all as NOP at least for now */
|
| 554 |
return;
|
| 555 |
default:
|
| 556 |
/* default specified as NOP equivalent */
|
| 557 |
return;
|
| 558 |
} |
| 559 |
} |
| 560 |
|
| 561 |
/* CLREX, DSB, DMB, ISB */
|
| 562 |
static void handle_sync(DisasContext *s, uint32_t insn, |
| 563 |
unsigned int op1, unsigned int op2, unsigned int crm) |
| 564 |
{
|
| 565 |
if (op1 != 3) { |
| 566 |
unallocated_encoding(s); |
| 567 |
return;
|
| 568 |
} |
| 569 |
|
| 570 |
switch (op2) {
|
| 571 |
case 2: /* CLREX */ |
| 572 |
unsupported_encoding(s, insn); |
| 573 |
return;
|
| 574 |
case 4: /* DSB */ |
| 575 |
case 5: /* DMB */ |
| 576 |
case 6: /* ISB */ |
| 577 |
/* We don't emulate caches so barriers are no-ops */
|
| 578 |
return;
|
| 579 |
default:
|
| 580 |
unallocated_encoding(s); |
| 581 |
return;
|
| 582 |
} |
| 583 |
} |
| 584 |
|
| 585 |
/* C5.6.130 MSR (immediate) - move immediate to processor state field */
|
| 586 |
static void handle_msr_i(DisasContext *s, uint32_t insn, |
| 587 |
unsigned int op1, unsigned int op2, unsigned int crm) |
| 588 |
{
|
| 589 |
unsupported_encoding(s, insn); |
| 590 |
} |
| 591 |
|
| 592 |
/* C5.6.204 SYS */
|
| 593 |
static void handle_sys(DisasContext *s, uint32_t insn, unsigned int l, |
| 594 |
unsigned int op1, unsigned int op2, |
| 595 |
unsigned int crn, unsigned int crm, unsigned int rt) |
| 596 |
{
|
| 597 |
unsupported_encoding(s, insn); |
| 598 |
} |
| 599 |
|
| 600 |
/* C5.6.129 MRS - move from system register */
|
| 601 |
static void handle_mrs(DisasContext *s, uint32_t insn, unsigned int op0, |
| 602 |
unsigned int op1, unsigned int op2, |
| 603 |
unsigned int crn, unsigned int crm, unsigned int rt) |
| 604 |
{
|
| 605 |
unsupported_encoding(s, insn); |
| 606 |
} |
| 607 |
|
| 608 |
/* C5.6.131 MSR (register) - move to system register */
|
| 609 |
static void handle_msr(DisasContext *s, uint32_t insn, unsigned int op0, |
| 610 |
unsigned int op1, unsigned int op2, |
| 611 |
unsigned int crn, unsigned int crm, unsigned int rt) |
| 612 |
{
|
| 613 |
unsupported_encoding(s, insn); |
| 614 |
} |
| 615 |
|
| 616 |
/* C3.2.4 System
|
| 617 |
* 31 22 21 20 19 18 16 15 12 11 8 7 5 4 0
|
| 618 |
* +---------------------+---+-----+-----+-------+-------+-----+------+
|
| 619 |
* | 1 1 0 1 0 1 0 1 0 0 | L | op0 | op1 | CRn | CRm | op2 | Rt |
|
| 620 |
* +---------------------+---+-----+-----+-------+-------+-----+------+
|
| 621 |
*/
|
| 622 |
static void disas_system(DisasContext *s, uint32_t insn) |
| 623 |
{
|
| 624 |
unsigned int l, op0, op1, crn, crm, op2, rt; |
| 625 |
l = extract32(insn, 21, 1); |
| 626 |
op0 = extract32(insn, 19, 2); |
| 627 |
op1 = extract32(insn, 16, 3); |
| 628 |
crn = extract32(insn, 12, 4); |
| 629 |
crm = extract32(insn, 8, 4); |
| 630 |
op2 = extract32(insn, 5, 3); |
| 631 |
rt = extract32(insn, 0, 5); |
| 632 |
|
| 633 |
if (op0 == 0) { |
| 634 |
if (l || rt != 31) { |
| 635 |
unallocated_encoding(s); |
| 636 |
return;
|
| 637 |
} |
| 638 |
switch (crn) {
|
| 639 |
case 2: /* C5.6.68 HINT */ |
| 640 |
handle_hint(s, insn, op1, op2, crm); |
| 641 |
break;
|
| 642 |
case 3: /* CLREX, DSB, DMB, ISB */ |
| 643 |
handle_sync(s, insn, op1, op2, crm); |
| 644 |
break;
|
| 645 |
case 4: /* C5.6.130 MSR (immediate) */ |
| 646 |
handle_msr_i(s, insn, op1, op2, crm); |
| 647 |
break;
|
| 648 |
default:
|
| 649 |
unallocated_encoding(s); |
| 650 |
break;
|
| 651 |
} |
| 652 |
return;
|
| 653 |
} |
| 654 |
|
| 655 |
if (op0 == 1) { |
| 656 |
/* C5.6.204 SYS */
|
| 657 |
handle_sys(s, insn, l, op1, op2, crn, crm, rt); |
| 658 |
} else if (l) { /* op0 > 1 */ |
| 659 |
/* C5.6.129 MRS - move from system register */
|
| 660 |
handle_mrs(s, insn, op0, op1, op2, crn, crm, rt); |
| 661 |
} else {
|
| 662 |
/* C5.6.131 MSR (register) - move to system register */
|
| 663 |
handle_msr(s, insn, op0, op1, op2, crn, crm, rt); |
| 664 |
} |
| 665 |
} |
| 666 |
|
| 667 |
/* Exception generation */
|
| 668 |
static void disas_exc(DisasContext *s, uint32_t insn) |
| 669 |
{
|
| 670 |
unsupported_encoding(s, insn); |
| 671 |
} |
| 672 |
|
| 673 |
/* C3.2.7 Unconditional branch (register)
|
| 674 |
* 31 25 24 21 20 16 15 10 9 5 4 0
|
| 675 |
* +---------------+-------+-------+-------+------+-------+
|
| 676 |
* | 1 1 0 1 0 1 1 | opc | op2 | op3 | Rn | op4 |
|
| 677 |
* +---------------+-------+-------+-------+------+-------+
|
| 678 |
*/
|
| 679 |
static void disas_uncond_b_reg(DisasContext *s, uint32_t insn) |
| 680 |
{
|
| 681 |
unsigned int opc, op2, op3, rn, op4; |
| 682 |
|
| 683 |
opc = extract32(insn, 21, 4); |
| 684 |
op2 = extract32(insn, 16, 5); |
| 685 |
op3 = extract32(insn, 10, 6); |
| 686 |
rn = extract32(insn, 5, 5); |
| 687 |
op4 = extract32(insn, 0, 5); |
| 688 |
|
| 689 |
if (op4 != 0x0 || op3 != 0x0 || op2 != 0x1f) { |
| 690 |
unallocated_encoding(s); |
| 691 |
return;
|
| 692 |
} |
| 693 |
|
| 694 |
switch (opc) {
|
| 695 |
case 0: /* BR */ |
| 696 |
case 2: /* RET */ |
| 697 |
break;
|
| 698 |
case 1: /* BLR */ |
| 699 |
tcg_gen_movi_i64(cpu_reg(s, 30), s->pc);
|
| 700 |
break;
|
| 701 |
case 4: /* ERET */ |
| 702 |
case 5: /* DRPS */ |
| 703 |
if (rn != 0x1f) { |
| 704 |
unallocated_encoding(s); |
| 705 |
} else {
|
| 706 |
unsupported_encoding(s, insn); |
| 707 |
} |
| 708 |
return;
|
| 709 |
default:
|
| 710 |
unallocated_encoding(s); |
| 711 |
return;
|
| 712 |
} |
| 713 |
|
| 714 |
tcg_gen_mov_i64(cpu_pc, cpu_reg(s, rn)); |
| 715 |
s->is_jmp = DISAS_JUMP; |
| 716 |
} |
| 717 |
|
| 718 |
/* C3.2 Branches, exception generating and system instructions */
|
| 719 |
static void disas_b_exc_sys(DisasContext *s, uint32_t insn) |
| 720 |
{
|
| 721 |
switch (extract32(insn, 25, 7)) { |
| 722 |
case 0x0a: case 0x0b: |
| 723 |
case 0x4a: case 0x4b: /* Unconditional branch (immediate) */ |
| 724 |
disas_uncond_b_imm(s, insn); |
| 725 |
break;
|
| 726 |
case 0x1a: case 0x5a: /* Compare & branch (immediate) */ |
| 727 |
disas_comp_b_imm(s, insn); |
| 728 |
break;
|
| 729 |
case 0x1b: case 0x5b: /* Test & branch (immediate) */ |
| 730 |
disas_test_b_imm(s, insn); |
| 731 |
break;
|
| 732 |
case 0x2a: /* Conditional branch (immediate) */ |
| 733 |
disas_cond_b_imm(s, insn); |
| 734 |
break;
|
| 735 |
case 0x6a: /* Exception generation / System */ |
| 736 |
if (insn & (1 << 24)) { |
| 737 |
disas_system(s, insn); |
| 738 |
} else {
|
| 739 |
disas_exc(s, insn); |
| 740 |
} |
| 741 |
break;
|
| 742 |
case 0x6b: /* Unconditional branch (register) */ |
| 743 |
disas_uncond_b_reg(s, insn); |
| 744 |
break;
|
| 745 |
default:
|
| 746 |
unallocated_encoding(s); |
| 747 |
break;
|
| 748 |
} |
| 749 |
} |
| 750 |
|
| 751 |
/* Load/store exclusive */
|
| 752 |
static void disas_ldst_excl(DisasContext *s, uint32_t insn) |
| 753 |
{
|
| 754 |
unsupported_encoding(s, insn); |
| 755 |
} |
| 756 |
|
| 757 |
/* Load register (literal) */
|
| 758 |
static void disas_ld_lit(DisasContext *s, uint32_t insn) |
| 759 |
{
|
| 760 |
unsupported_encoding(s, insn); |
| 761 |
} |
| 762 |
|
| 763 |
/*
|
| 764 |
* C5.6.80 LDNP (Load Pair - non-temporal hint)
|
| 765 |
* C5.6.81 LDP (Load Pair - non vector)
|
| 766 |
* C5.6.82 LDPSW (Load Pair Signed Word - non vector)
|
| 767 |
* C5.6.176 STNP (Store Pair - non-temporal hint)
|
| 768 |
* C5.6.177 STP (Store Pair - non vector)
|
| 769 |
* C6.3.165 LDNP (Load Pair of SIMD&FP - non-temporal hint)
|
| 770 |
* C6.3.165 LDP (Load Pair of SIMD&FP)
|
| 771 |
* C6.3.284 STNP (Store Pair of SIMD&FP - non-temporal hint)
|
| 772 |
* C6.3.284 STP (Store Pair of SIMD&FP)
|
| 773 |
*
|
| 774 |
* 31 30 29 27 26 25 24 23 22 21 15 14 10 9 5 4 0
|
| 775 |
* +-----+-------+---+---+-------+---+-----------------------------+
|
| 776 |
* | opc | 1 0 1 | V | 0 | index | L | imm7 | Rt2 | Rn | Rt |
|
| 777 |
* +-----+-------+---+---+-------+---+-------+-------+------+------+
|
| 778 |
*
|
| 779 |
* opc: LDP/STP/LDNP/STNP 00 -> 32 bit, 10 -> 64 bit
|
| 780 |
* LDPSW 01
|
| 781 |
* LDP/STP/LDNP/STNP (SIMD) 00 -> 32 bit, 01 -> 64 bit, 10 -> 128 bit
|
| 782 |
* V: 0 -> GPR, 1 -> Vector
|
| 783 |
* idx: 00 -> signed offset with non-temporal hint, 01 -> post-index,
|
| 784 |
* 10 -> signed offset, 11 -> pre-index
|
| 785 |
* L: 0 -> Store 1 -> Load
|
| 786 |
*
|
| 787 |
* Rt, Rt2 = GPR or SIMD registers to be stored
|
| 788 |
* Rn = general purpose register containing address
|
| 789 |
* imm7 = signed offset (multiple of 4 or 8 depending on size)
|
| 790 |
*/
|
| 791 |
static void disas_ldst_pair(DisasContext *s, uint32_t insn) |
| 792 |
{
|
| 793 |
int rt = extract32(insn, 0, 5); |
| 794 |
int rn = extract32(insn, 5, 5); |
| 795 |
int rt2 = extract32(insn, 10, 5); |
| 796 |
int64_t offset = sextract32(insn, 15, 7); |
| 797 |
int index = extract32(insn, 23, 2); |
| 798 |
bool is_vector = extract32(insn, 26, 1); |
| 799 |
bool is_load = extract32(insn, 22, 1); |
| 800 |
int opc = extract32(insn, 30, 2); |
| 801 |
|
| 802 |
bool is_signed = false; |
| 803 |
bool postindex = false; |
| 804 |
bool wback = false; |
| 805 |
|
| 806 |
TCGv_i64 tcg_addr; /* calculated address */
|
| 807 |
int size;
|
| 808 |
|
| 809 |
if (opc == 3) { |
| 810 |
unallocated_encoding(s); |
| 811 |
return;
|
| 812 |
} |
| 813 |
|
| 814 |
if (is_vector) {
|
| 815 |
size = 2 + opc;
|
| 816 |
} else {
|
| 817 |
size = 2 + extract32(opc, 1, 1); |
| 818 |
is_signed = extract32(opc, 0, 1); |
| 819 |
if (!is_load && is_signed) {
|
| 820 |
unallocated_encoding(s); |
| 821 |
return;
|
| 822 |
} |
| 823 |
} |
| 824 |
|
| 825 |
switch (index) {
|
| 826 |
case 1: /* post-index */ |
| 827 |
postindex = true;
|
| 828 |
wback = true;
|
| 829 |
break;
|
| 830 |
case 0: |
| 831 |
/* signed offset with "non-temporal" hint. Since we don't emulate
|
| 832 |
* caches we don't care about hints to the cache system about
|
| 833 |
* data access patterns, and handle this identically to plain
|
| 834 |
* signed offset.
|
| 835 |
*/
|
| 836 |
if (is_signed) {
|
| 837 |
/* There is no non-temporal-hint version of LDPSW */
|
| 838 |
unallocated_encoding(s); |
| 839 |
return;
|
| 840 |
} |
| 841 |
postindex = false;
|
| 842 |
break;
|
| 843 |
case 2: /* signed offset, rn not updated */ |
| 844 |
postindex = false;
|
| 845 |
break;
|
| 846 |
case 3: /* pre-index */ |
| 847 |
postindex = false;
|
| 848 |
wback = true;
|
| 849 |
break;
|
| 850 |
} |
| 851 |
|
| 852 |
offset <<= size; |
| 853 |
|
| 854 |
if (rn == 31) { |
| 855 |
gen_check_sp_alignment(s); |
| 856 |
} |
| 857 |
|
| 858 |
tcg_addr = read_cpu_reg_sp(s, rn, 1);
|
| 859 |
|
| 860 |
if (!postindex) {
|
| 861 |
tcg_gen_addi_i64(tcg_addr, tcg_addr, offset); |
| 862 |
} |
| 863 |
|
| 864 |
if (is_vector) {
|
| 865 |
if (is_load) {
|
| 866 |
do_fp_ld(s, rt, tcg_addr, size); |
| 867 |
} else {
|
| 868 |
do_fp_st(s, rt, tcg_addr, size); |
| 869 |
} |
| 870 |
} else {
|
| 871 |
TCGv_i64 tcg_rt = cpu_reg(s, rt); |
| 872 |
if (is_load) {
|
| 873 |
do_gpr_ld(s, tcg_rt, tcg_addr, size, is_signed, false);
|
| 874 |
} else {
|
| 875 |
do_gpr_st(s, tcg_rt, tcg_addr, size); |
| 876 |
} |
| 877 |
} |
| 878 |
tcg_gen_addi_i64(tcg_addr, tcg_addr, 1 << size);
|
| 879 |
if (is_vector) {
|
| 880 |
if (is_load) {
|
| 881 |
do_fp_ld(s, rt2, tcg_addr, size); |
| 882 |
} else {
|
| 883 |
do_fp_st(s, rt2, tcg_addr, size); |
| 884 |
} |
| 885 |
} else {
|
| 886 |
TCGv_i64 tcg_rt2 = cpu_reg(s, rt2); |
| 887 |
if (is_load) {
|
| 888 |
do_gpr_ld(s, tcg_rt2, tcg_addr, size, is_signed, false);
|
| 889 |
} else {
|
| 890 |
do_gpr_st(s, tcg_rt2, tcg_addr, size); |
| 891 |
} |
| 892 |
} |
| 893 |
|
| 894 |
if (wback) {
|
| 895 |
if (postindex) {
|
| 896 |
tcg_gen_addi_i64(tcg_addr, tcg_addr, offset - (1 << size));
|
| 897 |
} else {
|
| 898 |
tcg_gen_subi_i64(tcg_addr, tcg_addr, 1 << size);
|
| 899 |
} |
| 900 |
tcg_gen_mov_i64(cpu_reg_sp(s, rn), tcg_addr); |
| 901 |
} |
| 902 |
} |
| 903 |
|
| 904 |
/*
|
| 905 |
* C3.3.13 Load/store (unsigned immediate)
|
| 906 |
*
|
| 907 |
* 31 30 29 27 26 25 24 23 22 21 10 9 5
|
| 908 |
* +----+-------+---+-----+-----+------------+-------+------+
|
| 909 |
* |size| 1 1 1 | V | 0 1 | opc | imm12 | Rn | Rt |
|
| 910 |
* +----+-------+---+-----+-----+------------+-------+------+
|
| 911 |
*
|
| 912 |
* For non-vector:
|
| 913 |
* size: 00-> byte, 01 -> 16 bit, 10 -> 32bit, 11 -> 64bit
|
| 914 |
* opc: 00 -> store, 01 -> loadu, 10 -> loads 64, 11 -> loads 32
|
| 915 |
* For vector:
|
| 916 |
* size is opc<1>:size<1:0> so 100 -> 128 bit; 110 and 111 unallocated
|
| 917 |
* opc<0>: 0 -> store, 1 -> load
|
| 918 |
* Rn: base address register (inc SP)
|
| 919 |
* Rt: target register
|
| 920 |
*/
|
| 921 |
static void disas_ldst_reg_unsigned_imm(DisasContext *s, uint32_t insn) |
| 922 |
{
|
| 923 |
int rt = extract32(insn, 0, 5); |
| 924 |
int rn = extract32(insn, 5, 5); |
| 925 |
unsigned int imm12 = extract32(insn, 10, 12); |
| 926 |
bool is_vector = extract32(insn, 26, 1); |
| 927 |
int size = extract32(insn, 30, 2); |
| 928 |
int opc = extract32(insn, 22, 2); |
| 929 |
unsigned int offset; |
| 930 |
|
| 931 |
TCGv_i64 tcg_addr; |
| 932 |
|
| 933 |
bool is_store;
|
| 934 |
bool is_signed = false; |
| 935 |
bool is_extended = false; |
| 936 |
|
| 937 |
if (is_vector) {
|
| 938 |
size |= (opc & 2) << 1; |
| 939 |
if (size > 4) { |
| 940 |
unallocated_encoding(s); |
| 941 |
return;
|
| 942 |
} |
| 943 |
is_store = !extract32(opc, 0, 1); |
| 944 |
} else {
|
| 945 |
if (size == 3 && opc == 2) { |
| 946 |
/* PRFM - prefetch */
|
| 947 |
return;
|
| 948 |
} |
| 949 |
if (opc == 3 && size > 1) { |
| 950 |
unallocated_encoding(s); |
| 951 |
return;
|
| 952 |
} |
| 953 |
is_store = (opc == 0);
|
| 954 |
is_signed = extract32(opc, 1, 1); |
| 955 |
is_extended = (size < 3) && extract32(opc, 0, 1); |
| 956 |
} |
| 957 |
|
| 958 |
if (rn == 31) { |
| 959 |
gen_check_sp_alignment(s); |
| 960 |
} |
| 961 |
tcg_addr = read_cpu_reg_sp(s, rn, 1);
|
| 962 |
offset = imm12 << size; |
| 963 |
tcg_gen_addi_i64(tcg_addr, tcg_addr, offset); |
| 964 |
|
| 965 |
if (is_vector) {
|
| 966 |
if (is_store) {
|
| 967 |
do_fp_st(s, rt, tcg_addr, size); |
| 968 |
} else {
|
| 969 |
do_fp_ld(s, rt, tcg_addr, size); |
| 970 |
} |
| 971 |
} else {
|
| 972 |
TCGv_i64 tcg_rt = cpu_reg(s, rt); |
| 973 |
if (is_store) {
|
| 974 |
do_gpr_st(s, tcg_rt, tcg_addr, size); |
| 975 |
} else {
|
| 976 |
do_gpr_ld(s, tcg_rt, tcg_addr, size, is_signed, is_extended); |
| 977 |
} |
| 978 |
} |
| 979 |
} |
| 980 |
|
| 981 |
/* Load/store register (all forms) */
|
| 982 |
static void disas_ldst_reg(DisasContext *s, uint32_t insn) |
| 983 |
{
|
| 984 |
switch (extract32(insn, 24, 2)) { |
| 985 |
case 0: |
| 986 |
unsupported_encoding(s, insn); |
| 987 |
break;
|
| 988 |
case 1: |
| 989 |
disas_ldst_reg_unsigned_imm(s, insn); |
| 990 |
break;
|
| 991 |
default:
|
| 992 |
unallocated_encoding(s); |
| 993 |
break;
|
| 994 |
} |
| 995 |
} |
| 996 |
|
| 997 |
/* AdvSIMD load/store multiple structures */
|
| 998 |
static void disas_ldst_multiple_struct(DisasContext *s, uint32_t insn) |
| 999 |
{
|
| 1000 |
unsupported_encoding(s, insn); |
| 1001 |
} |
| 1002 |
|
| 1003 |
/* AdvSIMD load/store single structure */
|
| 1004 |
static void disas_ldst_single_struct(DisasContext *s, uint32_t insn) |
| 1005 |
{
|
| 1006 |
unsupported_encoding(s, insn); |
| 1007 |
} |
| 1008 |
|
| 1009 |
/* C3.3 Loads and stores */
|
| 1010 |
static void disas_ldst(DisasContext *s, uint32_t insn) |
| 1011 |
{
|
| 1012 |
switch (extract32(insn, 24, 6)) { |
| 1013 |
case 0x08: /* Load/store exclusive */ |
| 1014 |
disas_ldst_excl(s, insn); |
| 1015 |
break;
|
| 1016 |
case 0x18: case 0x1c: /* Load register (literal) */ |
| 1017 |
disas_ld_lit(s, insn); |
| 1018 |
break;
|
| 1019 |
case 0x28: case 0x29: |
| 1020 |
case 0x2c: case 0x2d: /* Load/store pair (all forms) */ |
| 1021 |
disas_ldst_pair(s, insn); |
| 1022 |
break;
|
| 1023 |
case 0x38: case 0x39: |
| 1024 |
case 0x3c: case 0x3d: /* Load/store register (all forms) */ |
| 1025 |
disas_ldst_reg(s, insn); |
| 1026 |
break;
|
| 1027 |
case 0x0c: /* AdvSIMD load/store multiple structures */ |
| 1028 |
disas_ldst_multiple_struct(s, insn); |
| 1029 |
break;
|
| 1030 |
case 0x0d: /* AdvSIMD load/store single structure */ |
| 1031 |
disas_ldst_single_struct(s, insn); |
| 1032 |
break;
|
| 1033 |
default:
|
| 1034 |
unallocated_encoding(s); |
| 1035 |
break;
|
| 1036 |
} |
| 1037 |
} |
| 1038 |
|
| 1039 |
/* C3.4.6 PC-rel. addressing
|
| 1040 |
* 31 30 29 28 24 23 5 4 0
|
| 1041 |
* +----+-------+-----------+-------------------+------+
|
| 1042 |
* | op | immlo | 1 0 0 0 0 | immhi | Rd |
|
| 1043 |
* +----+-------+-----------+-------------------+------+
|
| 1044 |
*/
|
| 1045 |
static void disas_pc_rel_adr(DisasContext *s, uint32_t insn) |
| 1046 |
{
|
| 1047 |
unsigned int page, rd; |
| 1048 |
uint64_t base; |
| 1049 |
int64_t offset; |
| 1050 |
|
| 1051 |
page = extract32(insn, 31, 1); |
| 1052 |
/* SignExtend(immhi:immlo) -> offset */
|
| 1053 |
offset = ((int64_t)sextract32(insn, 5, 19) << 2) | extract32(insn, 29, 2); |
| 1054 |
rd = extract32(insn, 0, 5); |
| 1055 |
base = s->pc - 4;
|
| 1056 |
|
| 1057 |
if (page) {
|
| 1058 |
/* ADRP (page based) */
|
| 1059 |
base &= ~0xfff;
|
| 1060 |
offset <<= 12;
|
| 1061 |
} |
| 1062 |
|
| 1063 |
tcg_gen_movi_i64(cpu_reg(s, rd), base + offset); |
| 1064 |
} |
| 1065 |
|
| 1066 |
/* Add/subtract (immediate) */
|
| 1067 |
static void disas_add_sub_imm(DisasContext *s, uint32_t insn) |
| 1068 |
{
|
| 1069 |
unsupported_encoding(s, insn); |
| 1070 |
} |
| 1071 |
|
| 1072 |
/* The input should be a value in the bottom e bits (with higher
|
| 1073 |
* bits zero); returns that value replicated into every element
|
| 1074 |
* of size e in a 64 bit integer.
|
| 1075 |
*/
|
| 1076 |
static uint64_t bitfield_replicate(uint64_t mask, unsigned int e) |
| 1077 |
{
|
| 1078 |
assert(e != 0);
|
| 1079 |
while (e < 64) { |
| 1080 |
mask |= mask << e; |
| 1081 |
e *= 2;
|
| 1082 |
} |
| 1083 |
return mask;
|
| 1084 |
} |
| 1085 |
|
| 1086 |
/* Return a value with the bottom len bits set (where 0 < len <= 64) */
|
| 1087 |
static inline uint64_t bitmask64(unsigned int length) |
| 1088 |
{
|
| 1089 |
assert(length > 0 && length <= 64); |
| 1090 |
return ~0ULL >> (64 - length); |
| 1091 |
} |
| 1092 |
|
| 1093 |
/* Simplified variant of pseudocode DecodeBitMasks() for the case where we
|
| 1094 |
* only require the wmask. Returns false if the imms/immr/immn are a reserved
|
| 1095 |
* value (ie should cause a guest UNDEF exception), and true if they are
|
| 1096 |
* valid, in which case the decoded bit pattern is written to result.
|
| 1097 |
*/
|
| 1098 |
static bool logic_imm_decode_wmask(uint64_t *result, unsigned int immn, |
| 1099 |
unsigned int imms, unsigned int immr) |
| 1100 |
{
|
| 1101 |
uint64_t mask; |
| 1102 |
unsigned e, levels, s, r;
|
| 1103 |
int len;
|
| 1104 |
|
| 1105 |
assert(immn < 2 && imms < 64 && immr < 64); |
| 1106 |
|
| 1107 |
/* The bit patterns we create here are 64 bit patterns which
|
| 1108 |
* are vectors of identical elements of size e = 2, 4, 8, 16, 32 or
|
| 1109 |
* 64 bits each. Each element contains the same value: a run
|
| 1110 |
* of between 1 and e-1 non-zero bits, rotated within the
|
| 1111 |
* element by between 0 and e-1 bits.
|
| 1112 |
*
|
| 1113 |
* The element size and run length are encoded into immn (1 bit)
|
| 1114 |
* and imms (6 bits) as follows:
|
| 1115 |
* 64 bit elements: immn = 1, imms = <length of run - 1>
|
| 1116 |
* 32 bit elements: immn = 0, imms = 0 : <length of run - 1>
|
| 1117 |
* 16 bit elements: immn = 0, imms = 10 : <length of run - 1>
|
| 1118 |
* 8 bit elements: immn = 0, imms = 110 : <length of run - 1>
|
| 1119 |
* 4 bit elements: immn = 0, imms = 1110 : <length of run - 1>
|
| 1120 |
* 2 bit elements: immn = 0, imms = 11110 : <length of run - 1>
|
| 1121 |
* Notice that immn = 0, imms = 11111x is the only combination
|
| 1122 |
* not covered by one of the above options; this is reserved.
|
| 1123 |
* Further, <length of run - 1> all-ones is a reserved pattern.
|
| 1124 |
*
|
| 1125 |
* In all cases the rotation is by immr % e (and immr is 6 bits).
|
| 1126 |
*/
|
| 1127 |
|
| 1128 |
/* First determine the element size */
|
| 1129 |
len = 31 - clz32((immn << 6) | (~imms & 0x3f)); |
| 1130 |
if (len < 1) { |
| 1131 |
/* This is the immn == 0, imms == 0x11111x case */
|
| 1132 |
return false; |
| 1133 |
} |
| 1134 |
e = 1 << len;
|
| 1135 |
|
| 1136 |
levels = e - 1;
|
| 1137 |
s = imms & levels; |
| 1138 |
r = immr & levels; |
| 1139 |
|
| 1140 |
if (s == levels) {
|
| 1141 |
/* <length of run - 1> mustn't be all-ones. */
|
| 1142 |
return false; |
| 1143 |
} |
| 1144 |
|
| 1145 |
/* Create the value of one element: s+1 set bits rotated
|
| 1146 |
* by r within the element (which is e bits wide)...
|
| 1147 |
*/
|
| 1148 |
mask = bitmask64(s + 1);
|
| 1149 |
mask = (mask >> r) | (mask << (e - r)); |
| 1150 |
/* ...then replicate the element over the whole 64 bit value */
|
| 1151 |
mask = bitfield_replicate(mask, e); |
| 1152 |
*result = mask; |
| 1153 |
return true; |
| 1154 |
} |
| 1155 |
|
| 1156 |
/* C3.4.4 Logical (immediate)
|
| 1157 |
* 31 30 29 28 23 22 21 16 15 10 9 5 4 0
|
| 1158 |
* +----+-----+-------------+---+------+------+------+------+
|
| 1159 |
* | sf | opc | 1 0 0 1 0 0 | N | immr | imms | Rn | Rd |
|
| 1160 |
* +----+-----+-------------+---+------+------+------+------+
|
| 1161 |
*/
|
| 1162 |
static void disas_logic_imm(DisasContext *s, uint32_t insn) |
| 1163 |
{
|
| 1164 |
unsigned int sf, opc, is_n, immr, imms, rn, rd; |
| 1165 |
TCGv_i64 tcg_rd, tcg_rn; |
| 1166 |
uint64_t wmask; |
| 1167 |
bool is_and = false; |
| 1168 |
|
| 1169 |
sf = extract32(insn, 31, 1); |
| 1170 |
opc = extract32(insn, 29, 2); |
| 1171 |
is_n = extract32(insn, 22, 1); |
| 1172 |
immr = extract32(insn, 16, 6); |
| 1173 |
imms = extract32(insn, 10, 6); |
| 1174 |
rn = extract32(insn, 5, 5); |
| 1175 |
rd = extract32(insn, 0, 5); |
| 1176 |
|
| 1177 |
if (!sf && is_n) {
|
| 1178 |
unallocated_encoding(s); |
| 1179 |
return;
|
| 1180 |
} |
| 1181 |
|
| 1182 |
if (opc == 0x3) { /* ANDS */ |
| 1183 |
tcg_rd = cpu_reg(s, rd); |
| 1184 |
} else {
|
| 1185 |
tcg_rd = cpu_reg_sp(s, rd); |
| 1186 |
} |
| 1187 |
tcg_rn = cpu_reg(s, rn); |
| 1188 |
|
| 1189 |
if (!logic_imm_decode_wmask(&wmask, is_n, imms, immr)) {
|
| 1190 |
/* some immediate field values are reserved */
|
| 1191 |
unallocated_encoding(s); |
| 1192 |
return;
|
| 1193 |
} |
| 1194 |
|
| 1195 |
if (!sf) {
|
| 1196 |
wmask &= 0xffffffff;
|
| 1197 |
} |
| 1198 |
|
| 1199 |
switch (opc) {
|
| 1200 |
case 0x3: /* ANDS */ |
| 1201 |
case 0x0: /* AND */ |
| 1202 |
tcg_gen_andi_i64(tcg_rd, tcg_rn, wmask); |
| 1203 |
is_and = true;
|
| 1204 |
break;
|
| 1205 |
case 0x1: /* ORR */ |
| 1206 |
tcg_gen_ori_i64(tcg_rd, tcg_rn, wmask); |
| 1207 |
break;
|
| 1208 |
case 0x2: /* EOR */ |
| 1209 |
tcg_gen_xori_i64(tcg_rd, tcg_rn, wmask); |
| 1210 |
break;
|
| 1211 |
default:
|
| 1212 |
assert(FALSE); /* must handle all above */
|
| 1213 |
break;
|
| 1214 |
} |
| 1215 |
|
| 1216 |
if (!sf && !is_and) {
|
| 1217 |
/* zero extend final result; we know we can skip this for AND
|
| 1218 |
* since the immediate had the high 32 bits clear.
|
| 1219 |
*/
|
| 1220 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
| 1221 |
} |
| 1222 |
|
| 1223 |
if (opc == 3) { /* ANDS */ |
| 1224 |
gen_logic_CC(sf, tcg_rd); |
| 1225 |
} |
| 1226 |
} |
| 1227 |
|
| 1228 |
/* Move wide (immediate) */
|
| 1229 |
static void disas_movw_imm(DisasContext *s, uint32_t insn) |
| 1230 |
{
|
| 1231 |
unsupported_encoding(s, insn); |
| 1232 |
} |
| 1233 |
|
| 1234 |
/* C3.4.2 Bitfield
|
| 1235 |
* 31 30 29 28 23 22 21 16 15 10 9 5 4 0
|
| 1236 |
* +----+-----+-------------+---+------+------+------+------+
|
| 1237 |
* | sf | opc | 1 0 0 1 1 0 | N | immr | imms | Rn | Rd |
|
| 1238 |
* +----+-----+-------------+---+------+------+------+------+
|
| 1239 |
*/
|
| 1240 |
static void disas_bitfield(DisasContext *s, uint32_t insn) |
| 1241 |
{
|
| 1242 |
unsigned int sf, n, opc, ri, si, rn, rd, bitsize, pos, len; |
| 1243 |
TCGv_i64 tcg_rd, tcg_tmp; |
| 1244 |
|
| 1245 |
sf = extract32(insn, 31, 1); |
| 1246 |
opc = extract32(insn, 29, 2); |
| 1247 |
n = extract32(insn, 22, 1); |
| 1248 |
ri = extract32(insn, 16, 6); |
| 1249 |
si = extract32(insn, 10, 6); |
| 1250 |
rn = extract32(insn, 5, 5); |
| 1251 |
rd = extract32(insn, 0, 5); |
| 1252 |
bitsize = sf ? 64 : 32; |
| 1253 |
|
| 1254 |
if (sf != n || ri >= bitsize || si >= bitsize || opc > 2) { |
| 1255 |
unallocated_encoding(s); |
| 1256 |
return;
|
| 1257 |
} |
| 1258 |
|
| 1259 |
tcg_rd = cpu_reg(s, rd); |
| 1260 |
tcg_tmp = read_cpu_reg(s, rn, sf); |
| 1261 |
|
| 1262 |
/* OPTME: probably worth recognizing common cases of ext{8,16,32}{u,s} */
|
| 1263 |
|
| 1264 |
if (opc != 1) { /* SBFM or UBFM */ |
| 1265 |
tcg_gen_movi_i64(tcg_rd, 0);
|
| 1266 |
} |
| 1267 |
|
| 1268 |
/* do the bit move operation */
|
| 1269 |
if (si >= ri) {
|
| 1270 |
/* Wd<s-r:0> = Wn<s:r> */
|
| 1271 |
tcg_gen_shri_i64(tcg_tmp, tcg_tmp, ri); |
| 1272 |
pos = 0;
|
| 1273 |
len = (si - ri) + 1;
|
| 1274 |
} else {
|
| 1275 |
/* Wd<32+s-r,32-r> = Wn<s:0> */
|
| 1276 |
pos = bitsize - ri; |
| 1277 |
len = si + 1;
|
| 1278 |
} |
| 1279 |
|
| 1280 |
tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_tmp, pos, len); |
| 1281 |
|
| 1282 |
if (opc == 0) { /* SBFM - sign extend the destination field */ |
| 1283 |
tcg_gen_shli_i64(tcg_rd, tcg_rd, 64 - (pos + len));
|
| 1284 |
tcg_gen_sari_i64(tcg_rd, tcg_rd, 64 - (pos + len));
|
| 1285 |
} |
| 1286 |
|
| 1287 |
if (!sf) { /* zero extend final result */ |
| 1288 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
| 1289 |
} |
| 1290 |
} |
| 1291 |
|
| 1292 |
/* C3.4.3 Extract
|
| 1293 |
* 31 30 29 28 23 22 21 20 16 15 10 9 5 4 0
|
| 1294 |
* +----+------+-------------+---+----+------+--------+------+------+
|
| 1295 |
* | sf | op21 | 1 0 0 1 1 1 | N | o0 | Rm | imms | Rn | Rd |
|
| 1296 |
* +----+------+-------------+---+----+------+--------+------+------+
|
| 1297 |
*/
|
| 1298 |
static void disas_extract(DisasContext *s, uint32_t insn) |
| 1299 |
{
|
| 1300 |
unsigned int sf, n, rm, imm, rn, rd, bitsize, op21, op0; |
| 1301 |
|
| 1302 |
sf = extract32(insn, 31, 1); |
| 1303 |
n = extract32(insn, 22, 1); |
| 1304 |
rm = extract32(insn, 16, 5); |
| 1305 |
imm = extract32(insn, 10, 6); |
| 1306 |
rn = extract32(insn, 5, 5); |
| 1307 |
rd = extract32(insn, 0, 5); |
| 1308 |
op21 = extract32(insn, 29, 2); |
| 1309 |
op0 = extract32(insn, 21, 1); |
| 1310 |
bitsize = sf ? 64 : 32; |
| 1311 |
|
| 1312 |
if (sf != n || op21 || op0 || imm >= bitsize) {
|
| 1313 |
unallocated_encoding(s); |
| 1314 |
} else {
|
| 1315 |
TCGv_i64 tcg_rd, tcg_rm, tcg_rn; |
| 1316 |
|
| 1317 |
tcg_rd = cpu_reg(s, rd); |
| 1318 |
|
| 1319 |
if (imm) {
|
| 1320 |
/* OPTME: we can special case rm==rn as a rotate */
|
| 1321 |
tcg_rm = read_cpu_reg(s, rm, sf); |
| 1322 |
tcg_rn = read_cpu_reg(s, rn, sf); |
| 1323 |
tcg_gen_shri_i64(tcg_rm, tcg_rm, imm); |
| 1324 |
tcg_gen_shli_i64(tcg_rn, tcg_rn, bitsize - imm); |
| 1325 |
tcg_gen_or_i64(tcg_rd, tcg_rm, tcg_rn); |
| 1326 |
if (!sf) {
|
| 1327 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
| 1328 |
} |
| 1329 |
} else {
|
| 1330 |
/* tcg shl_i32/shl_i64 is undefined for 32/64 bit shifts,
|
| 1331 |
* so an extract from bit 0 is a special case.
|
| 1332 |
*/
|
| 1333 |
if (sf) {
|
| 1334 |
tcg_gen_mov_i64(tcg_rd, cpu_reg(s, rm)); |
| 1335 |
} else {
|
| 1336 |
tcg_gen_ext32u_i64(tcg_rd, cpu_reg(s, rm)); |
| 1337 |
} |
| 1338 |
} |
| 1339 |
|
| 1340 |
} |
| 1341 |
} |
| 1342 |
|
| 1343 |
/* C3.4 Data processing - immediate */
|
| 1344 |
static void disas_data_proc_imm(DisasContext *s, uint32_t insn) |
| 1345 |
{
|
| 1346 |
switch (extract32(insn, 23, 6)) { |
| 1347 |
case 0x20: case 0x21: /* PC-rel. addressing */ |
| 1348 |
disas_pc_rel_adr(s, insn); |
| 1349 |
break;
|
| 1350 |
case 0x22: case 0x23: /* Add/subtract (immediate) */ |
| 1351 |
disas_add_sub_imm(s, insn); |
| 1352 |
break;
|
| 1353 |
case 0x24: /* Logical (immediate) */ |
| 1354 |
disas_logic_imm(s, insn); |
| 1355 |
break;
|
| 1356 |
case 0x25: /* Move wide (immediate) */ |
| 1357 |
disas_movw_imm(s, insn); |
| 1358 |
break;
|
| 1359 |
case 0x26: /* Bitfield */ |
| 1360 |
disas_bitfield(s, insn); |
| 1361 |
break;
|
| 1362 |
case 0x27: /* Extract */ |
| 1363 |
disas_extract(s, insn); |
| 1364 |
break;
|
| 1365 |
default:
|
| 1366 |
unallocated_encoding(s); |
| 1367 |
break;
|
| 1368 |
} |
| 1369 |
} |
| 1370 |
|
| 1371 |
/* Shift a TCGv src by TCGv shift_amount, put result in dst.
|
| 1372 |
* Note that it is the caller's responsibility to ensure that the
|
| 1373 |
* shift amount is in range (ie 0..31 or 0..63) and provide the ARM
|
| 1374 |
* mandated semantics for out of range shifts.
|
| 1375 |
*/
|
| 1376 |
static void shift_reg(TCGv_i64 dst, TCGv_i64 src, int sf, |
| 1377 |
enum a64_shift_type shift_type, TCGv_i64 shift_amount)
|
| 1378 |
{
|
| 1379 |
switch (shift_type) {
|
| 1380 |
case A64_SHIFT_TYPE_LSL:
|
| 1381 |
tcg_gen_shl_i64(dst, src, shift_amount); |
| 1382 |
break;
|
| 1383 |
case A64_SHIFT_TYPE_LSR:
|
| 1384 |
tcg_gen_shr_i64(dst, src, shift_amount); |
| 1385 |
break;
|
| 1386 |
case A64_SHIFT_TYPE_ASR:
|
| 1387 |
if (!sf) {
|
| 1388 |
tcg_gen_ext32s_i64(dst, src); |
| 1389 |
} |
| 1390 |
tcg_gen_sar_i64(dst, sf ? src : dst, shift_amount); |
| 1391 |
break;
|
| 1392 |
case A64_SHIFT_TYPE_ROR:
|
| 1393 |
if (sf) {
|
| 1394 |
tcg_gen_rotr_i64(dst, src, shift_amount); |
| 1395 |
} else {
|
| 1396 |
TCGv_i32 t0, t1; |
| 1397 |
t0 = tcg_temp_new_i32(); |
| 1398 |
t1 = tcg_temp_new_i32(); |
| 1399 |
tcg_gen_trunc_i64_i32(t0, src); |
| 1400 |
tcg_gen_trunc_i64_i32(t1, shift_amount); |
| 1401 |
tcg_gen_rotr_i32(t0, t0, t1); |
| 1402 |
tcg_gen_extu_i32_i64(dst, t0); |
| 1403 |
tcg_temp_free_i32(t0); |
| 1404 |
tcg_temp_free_i32(t1); |
| 1405 |
} |
| 1406 |
break;
|
| 1407 |
default:
|
| 1408 |
assert(FALSE); /* all shift types should be handled */
|
| 1409 |
break;
|
| 1410 |
} |
| 1411 |
|
| 1412 |
if (!sf) { /* zero extend final result */ |
| 1413 |
tcg_gen_ext32u_i64(dst, dst); |
| 1414 |
} |
| 1415 |
} |
| 1416 |
|
| 1417 |
/* Shift a TCGv src by immediate, put result in dst.
|
| 1418 |
* The shift amount must be in range (this should always be true as the
|
| 1419 |
* relevant instructions will UNDEF on bad shift immediates).
|
| 1420 |
*/
|
| 1421 |
static void shift_reg_imm(TCGv_i64 dst, TCGv_i64 src, int sf, |
| 1422 |
enum a64_shift_type shift_type, unsigned int shift_i) |
| 1423 |
{
|
| 1424 |
assert(shift_i < (sf ? 64 : 32)); |
| 1425 |
|
| 1426 |
if (shift_i == 0) { |
| 1427 |
tcg_gen_mov_i64(dst, src); |
| 1428 |
} else {
|
| 1429 |
TCGv_i64 shift_const; |
| 1430 |
|
| 1431 |
shift_const = tcg_const_i64(shift_i); |
| 1432 |
shift_reg(dst, src, sf, shift_type, shift_const); |
| 1433 |
tcg_temp_free_i64(shift_const); |
| 1434 |
} |
| 1435 |
} |
| 1436 |
|
| 1437 |
/* C3.5.10 Logical (shifted register)
|
| 1438 |
* 31 30 29 28 24 23 22 21 20 16 15 10 9 5 4 0
|
| 1439 |
* +----+-----+-----------+-------+---+------+--------+------+------+
|
| 1440 |
* | sf | opc | 0 1 0 1 0 | shift | N | Rm | imm6 | Rn | Rd |
|
| 1441 |
* +----+-----+-----------+-------+---+------+--------+------+------+
|
| 1442 |
*/
|
| 1443 |
static void disas_logic_reg(DisasContext *s, uint32_t insn) |
| 1444 |
{
|
| 1445 |
TCGv_i64 tcg_rd, tcg_rn, tcg_rm; |
| 1446 |
unsigned int sf, opc, shift_type, invert, rm, shift_amount, rn, rd; |
| 1447 |
|
| 1448 |
sf = extract32(insn, 31, 1); |
| 1449 |
opc = extract32(insn, 29, 2); |
| 1450 |
shift_type = extract32(insn, 22, 2); |
| 1451 |
invert = extract32(insn, 21, 1); |
| 1452 |
rm = extract32(insn, 16, 5); |
| 1453 |
shift_amount = extract32(insn, 10, 6); |
| 1454 |
rn = extract32(insn, 5, 5); |
| 1455 |
rd = extract32(insn, 0, 5); |
| 1456 |
|
| 1457 |
if (!sf && (shift_amount & (1 << 5))) { |
| 1458 |
unallocated_encoding(s); |
| 1459 |
return;
|
| 1460 |
} |
| 1461 |
|
| 1462 |
tcg_rd = cpu_reg(s, rd); |
| 1463 |
|
| 1464 |
if (opc == 1 && shift_amount == 0 && shift_type == 0 && rn == 31) { |
| 1465 |
/* Unshifted ORR and ORN with WZR/XZR is the standard encoding for
|
| 1466 |
* register-register MOV and MVN, so it is worth special casing.
|
| 1467 |
*/
|
| 1468 |
tcg_rm = cpu_reg(s, rm); |
| 1469 |
if (invert) {
|
| 1470 |
tcg_gen_not_i64(tcg_rd, tcg_rm); |
| 1471 |
if (!sf) {
|
| 1472 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
| 1473 |
} |
| 1474 |
} else {
|
| 1475 |
if (sf) {
|
| 1476 |
tcg_gen_mov_i64(tcg_rd, tcg_rm); |
| 1477 |
} else {
|
| 1478 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rm); |
| 1479 |
} |
| 1480 |
} |
| 1481 |
return;
|
| 1482 |
} |
| 1483 |
|
| 1484 |
tcg_rm = read_cpu_reg(s, rm, sf); |
| 1485 |
|
| 1486 |
if (shift_amount) {
|
| 1487 |
shift_reg_imm(tcg_rm, tcg_rm, sf, shift_type, shift_amount); |
| 1488 |
} |
| 1489 |
|
| 1490 |
tcg_rn = cpu_reg(s, rn); |
| 1491 |
|
| 1492 |
switch (opc | (invert << 2)) { |
| 1493 |
case 0: /* AND */ |
| 1494 |
case 3: /* ANDS */ |
| 1495 |
tcg_gen_and_i64(tcg_rd, tcg_rn, tcg_rm); |
| 1496 |
break;
|
| 1497 |
case 1: /* ORR */ |
| 1498 |
tcg_gen_or_i64(tcg_rd, tcg_rn, tcg_rm); |
| 1499 |
break;
|
| 1500 |
case 2: /* EOR */ |
| 1501 |
tcg_gen_xor_i64(tcg_rd, tcg_rn, tcg_rm); |
| 1502 |
break;
|
| 1503 |
case 4: /* BIC */ |
| 1504 |
case 7: /* BICS */ |
| 1505 |
tcg_gen_andc_i64(tcg_rd, tcg_rn, tcg_rm); |
| 1506 |
break;
|
| 1507 |
case 5: /* ORN */ |
| 1508 |
tcg_gen_orc_i64(tcg_rd, tcg_rn, tcg_rm); |
| 1509 |
break;
|
| 1510 |
case 6: /* EON */ |
| 1511 |
tcg_gen_eqv_i64(tcg_rd, tcg_rn, tcg_rm); |
| 1512 |
break;
|
| 1513 |
default:
|
| 1514 |
assert(FALSE); |
| 1515 |
break;
|
| 1516 |
} |
| 1517 |
|
| 1518 |
if (!sf) {
|
| 1519 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
| 1520 |
} |
| 1521 |
|
| 1522 |
if (opc == 3) { |
| 1523 |
gen_logic_CC(sf, tcg_rd); |
| 1524 |
} |
| 1525 |
} |
| 1526 |
|
| 1527 |
/* Add/subtract (extended register) */
|
| 1528 |
static void disas_add_sub_ext_reg(DisasContext *s, uint32_t insn) |
| 1529 |
{
|
| 1530 |
unsupported_encoding(s, insn); |
| 1531 |
} |
| 1532 |
|
| 1533 |
/* Add/subtract (shifted register) */
|
| 1534 |
static void disas_add_sub_reg(DisasContext *s, uint32_t insn) |
| 1535 |
{
|
| 1536 |
unsupported_encoding(s, insn); |
| 1537 |
} |
| 1538 |
|
| 1539 |
/* Data-processing (3 source) */
|
| 1540 |
static void disas_data_proc_3src(DisasContext *s, uint32_t insn) |
| 1541 |
{
|
| 1542 |
unsupported_encoding(s, insn); |
| 1543 |
} |
| 1544 |
|
| 1545 |
/* Add/subtract (with carry) */
|
| 1546 |
static void disas_adc_sbc(DisasContext *s, uint32_t insn) |
| 1547 |
{
|
| 1548 |
unsupported_encoding(s, insn); |
| 1549 |
} |
| 1550 |
|
| 1551 |
/* Conditional compare (immediate) */
|
| 1552 |
static void disas_cc_imm(DisasContext *s, uint32_t insn) |
| 1553 |
{
|
| 1554 |
unsupported_encoding(s, insn); |
| 1555 |
} |
| 1556 |
|
| 1557 |
/* Conditional compare (register) */
|
| 1558 |
static void disas_cc_reg(DisasContext *s, uint32_t insn) |
| 1559 |
{
|
| 1560 |
unsupported_encoding(s, insn); |
| 1561 |
} |
| 1562 |
|
| 1563 |
/* C3.5.6 Conditional select
|
| 1564 |
* 31 30 29 28 21 20 16 15 12 11 10 9 5 4 0
|
| 1565 |
* +----+----+---+-----------------+------+------+-----+------+------+
|
| 1566 |
* | sf | op | S | 1 1 0 1 0 1 0 0 | Rm | cond | op2 | Rn | Rd |
|
| 1567 |
* +----+----+---+-----------------+------+------+-----+------+------+
|
| 1568 |
*/
|
| 1569 |
static void disas_cond_select(DisasContext *s, uint32_t insn) |
| 1570 |
{
|
| 1571 |
unsigned int sf, else_inv, rm, cond, else_inc, rn, rd; |
| 1572 |
TCGv_i64 tcg_rd, tcg_src; |
| 1573 |
|
| 1574 |
if (extract32(insn, 29, 1) || extract32(insn, 11, 1)) { |
| 1575 |
/* S == 1 or op2<1> == 1 */
|
| 1576 |
unallocated_encoding(s); |
| 1577 |
return;
|
| 1578 |
} |
| 1579 |
sf = extract32(insn, 31, 1); |
| 1580 |
else_inv = extract32(insn, 30, 1); |
| 1581 |
rm = extract32(insn, 16, 5); |
| 1582 |
cond = extract32(insn, 12, 4); |
| 1583 |
else_inc = extract32(insn, 10, 1); |
| 1584 |
rn = extract32(insn, 5, 5); |
| 1585 |
rd = extract32(insn, 0, 5); |
| 1586 |
|
| 1587 |
if (rd == 31) { |
| 1588 |
/* silly no-op write; until we use movcond we must special-case
|
| 1589 |
* this to avoid a dead temporary across basic blocks.
|
| 1590 |
*/
|
| 1591 |
return;
|
| 1592 |
} |
| 1593 |
|
| 1594 |
tcg_rd = cpu_reg(s, rd); |
| 1595 |
|
| 1596 |
if (cond >= 0x0e) { /* condition "always" */ |
| 1597 |
tcg_src = read_cpu_reg(s, rn, sf); |
| 1598 |
tcg_gen_mov_i64(tcg_rd, tcg_src); |
| 1599 |
} else {
|
| 1600 |
/* OPTME: we could use movcond here, at the cost of duplicating
|
| 1601 |
* a lot of the arm_gen_test_cc() logic.
|
| 1602 |
*/
|
| 1603 |
int label_match = gen_new_label();
|
| 1604 |
int label_continue = gen_new_label();
|
| 1605 |
|
| 1606 |
arm_gen_test_cc(cond, label_match); |
| 1607 |
/* nomatch: */
|
| 1608 |
tcg_src = cpu_reg(s, rm); |
| 1609 |
|
| 1610 |
if (else_inv && else_inc) {
|
| 1611 |
tcg_gen_neg_i64(tcg_rd, tcg_src); |
| 1612 |
} else if (else_inv) { |
| 1613 |
tcg_gen_not_i64(tcg_rd, tcg_src); |
| 1614 |
} else if (else_inc) { |
| 1615 |
tcg_gen_addi_i64(tcg_rd, tcg_src, 1);
|
| 1616 |
} else {
|
| 1617 |
tcg_gen_mov_i64(tcg_rd, tcg_src); |
| 1618 |
} |
| 1619 |
if (!sf) {
|
| 1620 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
| 1621 |
} |
| 1622 |
tcg_gen_br(label_continue); |
| 1623 |
/* match: */
|
| 1624 |
gen_set_label(label_match); |
| 1625 |
tcg_src = read_cpu_reg(s, rn, sf); |
| 1626 |
tcg_gen_mov_i64(tcg_rd, tcg_src); |
| 1627 |
/* continue: */
|
| 1628 |
gen_set_label(label_continue); |
| 1629 |
} |
| 1630 |
} |
| 1631 |
|
| 1632 |
static void handle_clz(DisasContext *s, unsigned int sf, |
| 1633 |
unsigned int rn, unsigned int rd) |
| 1634 |
{
|
| 1635 |
TCGv_i64 tcg_rd, tcg_rn; |
| 1636 |
tcg_rd = cpu_reg(s, rd); |
| 1637 |
tcg_rn = cpu_reg(s, rn); |
| 1638 |
|
| 1639 |
if (sf) {
|
| 1640 |
gen_helper_clz64(tcg_rd, tcg_rn); |
| 1641 |
} else {
|
| 1642 |
TCGv_i32 tcg_tmp32 = tcg_temp_new_i32(); |
| 1643 |
tcg_gen_trunc_i64_i32(tcg_tmp32, tcg_rn); |
| 1644 |
gen_helper_clz(tcg_tmp32, tcg_tmp32); |
| 1645 |
tcg_gen_extu_i32_i64(tcg_rd, tcg_tmp32); |
| 1646 |
tcg_temp_free_i32(tcg_tmp32); |
| 1647 |
} |
| 1648 |
} |
| 1649 |
|
| 1650 |
static void handle_cls(DisasContext *s, unsigned int sf, |
| 1651 |
unsigned int rn, unsigned int rd) |
| 1652 |
{
|
| 1653 |
TCGv_i64 tcg_rd, tcg_rn; |
| 1654 |
tcg_rd = cpu_reg(s, rd); |
| 1655 |
tcg_rn = cpu_reg(s, rn); |
| 1656 |
|
| 1657 |
if (sf) {
|
| 1658 |
gen_helper_cls64(tcg_rd, tcg_rn); |
| 1659 |
} else {
|
| 1660 |
TCGv_i32 tcg_tmp32 = tcg_temp_new_i32(); |
| 1661 |
tcg_gen_trunc_i64_i32(tcg_tmp32, tcg_rn); |
| 1662 |
gen_helper_cls32(tcg_tmp32, tcg_tmp32); |
| 1663 |
tcg_gen_extu_i32_i64(tcg_rd, tcg_tmp32); |
| 1664 |
tcg_temp_free_i32(tcg_tmp32); |
| 1665 |
} |
| 1666 |
} |
| 1667 |
|
| 1668 |
static void handle_rbit(DisasContext *s, unsigned int sf, |
| 1669 |
unsigned int rn, unsigned int rd) |
| 1670 |
{
|
| 1671 |
TCGv_i64 tcg_rd, tcg_rn; |
| 1672 |
tcg_rd = cpu_reg(s, rd); |
| 1673 |
tcg_rn = cpu_reg(s, rn); |
| 1674 |
|
| 1675 |
if (sf) {
|
| 1676 |
gen_helper_rbit64(tcg_rd, tcg_rn); |
| 1677 |
} else {
|
| 1678 |
TCGv_i32 tcg_tmp32 = tcg_temp_new_i32(); |
| 1679 |
tcg_gen_trunc_i64_i32(tcg_tmp32, tcg_rn); |
| 1680 |
gen_helper_rbit(tcg_tmp32, tcg_tmp32); |
| 1681 |
tcg_gen_extu_i32_i64(tcg_rd, tcg_tmp32); |
| 1682 |
tcg_temp_free_i32(tcg_tmp32); |
| 1683 |
} |
| 1684 |
} |
| 1685 |
|
| 1686 |
/* C5.6.149 REV with sf==1, opcode==3 ("REV64") */
|
| 1687 |
static void handle_rev64(DisasContext *s, unsigned int sf, |
| 1688 |
unsigned int rn, unsigned int rd) |
| 1689 |
{
|
| 1690 |
if (!sf) {
|
| 1691 |
unallocated_encoding(s); |
| 1692 |
return;
|
| 1693 |
} |
| 1694 |
tcg_gen_bswap64_i64(cpu_reg(s, rd), cpu_reg(s, rn)); |
| 1695 |
} |
| 1696 |
|
| 1697 |
/* C5.6.149 REV with sf==0, opcode==2
|
| 1698 |
* C5.6.151 REV32 (sf==1, opcode==2)
|
| 1699 |
*/
|
| 1700 |
static void handle_rev32(DisasContext *s, unsigned int sf, |
| 1701 |
unsigned int rn, unsigned int rd) |
| 1702 |
{
|
| 1703 |
TCGv_i64 tcg_rd = cpu_reg(s, rd); |
| 1704 |
|
| 1705 |
if (sf) {
|
| 1706 |
TCGv_i64 tcg_tmp = tcg_temp_new_i64(); |
| 1707 |
TCGv_i64 tcg_rn = read_cpu_reg(s, rn, sf); |
| 1708 |
|
| 1709 |
/* bswap32_i64 requires zero high word */
|
| 1710 |
tcg_gen_ext32u_i64(tcg_tmp, tcg_rn); |
| 1711 |
tcg_gen_bswap32_i64(tcg_rd, tcg_tmp); |
| 1712 |
tcg_gen_shri_i64(tcg_tmp, tcg_rn, 32);
|
| 1713 |
tcg_gen_bswap32_i64(tcg_tmp, tcg_tmp); |
| 1714 |
tcg_gen_concat32_i64(tcg_rd, tcg_rd, tcg_tmp); |
| 1715 |
|
| 1716 |
tcg_temp_free_i64(tcg_tmp); |
| 1717 |
} else {
|
| 1718 |
tcg_gen_ext32u_i64(tcg_rd, cpu_reg(s, rn)); |
| 1719 |
tcg_gen_bswap32_i64(tcg_rd, tcg_rd); |
| 1720 |
} |
| 1721 |
} |
| 1722 |
|
| 1723 |
/* C5.6.150 REV16 (opcode==1) */
|
| 1724 |
static void handle_rev16(DisasContext *s, unsigned int sf, |
| 1725 |
unsigned int rn, unsigned int rd) |
| 1726 |
{
|
| 1727 |
TCGv_i64 tcg_rd = cpu_reg(s, rd); |
| 1728 |
TCGv_i64 tcg_tmp = tcg_temp_new_i64(); |
| 1729 |
TCGv_i64 tcg_rn = read_cpu_reg(s, rn, sf); |
| 1730 |
|
| 1731 |
tcg_gen_andi_i64(tcg_tmp, tcg_rn, 0xffff);
|
| 1732 |
tcg_gen_bswap16_i64(tcg_rd, tcg_tmp); |
| 1733 |
|
| 1734 |
tcg_gen_shri_i64(tcg_tmp, tcg_rn, 16);
|
| 1735 |
tcg_gen_andi_i64(tcg_tmp, tcg_tmp, 0xffff);
|
| 1736 |
tcg_gen_bswap16_i64(tcg_tmp, tcg_tmp); |
| 1737 |
tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_tmp, 16, 16); |
| 1738 |
|
| 1739 |
if (sf) {
|
| 1740 |
tcg_gen_shri_i64(tcg_tmp, tcg_rn, 32);
|
| 1741 |
tcg_gen_andi_i64(tcg_tmp, tcg_tmp, 0xffff);
|
| 1742 |
tcg_gen_bswap16_i64(tcg_tmp, tcg_tmp); |
| 1743 |
tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_tmp, 32, 16); |
| 1744 |
|
| 1745 |
tcg_gen_shri_i64(tcg_tmp, tcg_rn, 48);
|
| 1746 |
tcg_gen_bswap16_i64(tcg_tmp, tcg_tmp); |
| 1747 |
tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_tmp, 48, 16); |
| 1748 |
} |
| 1749 |
|
| 1750 |
tcg_temp_free_i64(tcg_tmp); |
| 1751 |
} |
| 1752 |
|
| 1753 |
/* C3.5.7 Data-processing (1 source)
|
| 1754 |
* 31 30 29 28 21 20 16 15 10 9 5 4 0
|
| 1755 |
* +----+---+---+-----------------+---------+--------+------+------+
|
| 1756 |
* | sf | 1 | S | 1 1 0 1 0 1 1 0 | opcode2 | opcode | Rn | Rd |
|
| 1757 |
* +----+---+---+-----------------+---------+--------+------+------+
|
| 1758 |
*/
|
| 1759 |
static void disas_data_proc_1src(DisasContext *s, uint32_t insn) |
| 1760 |
{
|
| 1761 |
unsigned int sf, opcode, rn, rd; |
| 1762 |
|
| 1763 |
if (extract32(insn, 29, 1) || extract32(insn, 16, 5)) { |
| 1764 |
unallocated_encoding(s); |
| 1765 |
return;
|
| 1766 |
} |
| 1767 |
|
| 1768 |
sf = extract32(insn, 31, 1); |
| 1769 |
opcode = extract32(insn, 10, 6); |
| 1770 |
rn = extract32(insn, 5, 5); |
| 1771 |
rd = extract32(insn, 0, 5); |
| 1772 |
|
| 1773 |
switch (opcode) {
|
| 1774 |
case 0: /* RBIT */ |
| 1775 |
handle_rbit(s, sf, rn, rd); |
| 1776 |
break;
|
| 1777 |
case 1: /* REV16 */ |
| 1778 |
handle_rev16(s, sf, rn, rd); |
| 1779 |
break;
|
| 1780 |
case 2: /* REV32 */ |
| 1781 |
handle_rev32(s, sf, rn, rd); |
| 1782 |
break;
|
| 1783 |
case 3: /* REV64 */ |
| 1784 |
handle_rev64(s, sf, rn, rd); |
| 1785 |
break;
|
| 1786 |
case 4: /* CLZ */ |
| 1787 |
handle_clz(s, sf, rn, rd); |
| 1788 |
break;
|
| 1789 |
case 5: /* CLS */ |
| 1790 |
handle_cls(s, sf, rn, rd); |
| 1791 |
break;
|
| 1792 |
} |
| 1793 |
} |
| 1794 |
|
| 1795 |
static void handle_div(DisasContext *s, bool is_signed, unsigned int sf, |
| 1796 |
unsigned int rm, unsigned int rn, unsigned int rd) |
| 1797 |
{
|
| 1798 |
TCGv_i64 tcg_n, tcg_m, tcg_rd; |
| 1799 |
tcg_rd = cpu_reg(s, rd); |
| 1800 |
|
| 1801 |
if (!sf && is_signed) {
|
| 1802 |
tcg_n = new_tmp_a64(s); |
| 1803 |
tcg_m = new_tmp_a64(s); |
| 1804 |
tcg_gen_ext32s_i64(tcg_n, cpu_reg(s, rn)); |
| 1805 |
tcg_gen_ext32s_i64(tcg_m, cpu_reg(s, rm)); |
| 1806 |
} else {
|
| 1807 |
tcg_n = read_cpu_reg(s, rn, sf); |
| 1808 |
tcg_m = read_cpu_reg(s, rm, sf); |
| 1809 |
} |
| 1810 |
|
| 1811 |
if (is_signed) {
|
| 1812 |
gen_helper_sdiv64(tcg_rd, tcg_n, tcg_m); |
| 1813 |
} else {
|
| 1814 |
gen_helper_udiv64(tcg_rd, tcg_n, tcg_m); |
| 1815 |
} |
| 1816 |
|
| 1817 |
if (!sf) { /* zero extend final result */ |
| 1818 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
| 1819 |
} |
| 1820 |
} |
| 1821 |
|
| 1822 |
/* C5.6.115 LSLV, C5.6.118 LSRV, C5.6.17 ASRV, C5.6.154 RORV */
|
| 1823 |
static void handle_shift_reg(DisasContext *s, |
| 1824 |
enum a64_shift_type shift_type, unsigned int sf, |
| 1825 |
unsigned int rm, unsigned int rn, unsigned int rd) |
| 1826 |
{
|
| 1827 |
TCGv_i64 tcg_shift = tcg_temp_new_i64(); |
| 1828 |
TCGv_i64 tcg_rd = cpu_reg(s, rd); |
| 1829 |
TCGv_i64 tcg_rn = read_cpu_reg(s, rn, sf); |
| 1830 |
|
| 1831 |
tcg_gen_andi_i64(tcg_shift, cpu_reg(s, rm), sf ? 63 : 31); |
| 1832 |
shift_reg(tcg_rd, tcg_rn, sf, shift_type, tcg_shift); |
| 1833 |
tcg_temp_free_i64(tcg_shift); |
| 1834 |
} |
| 1835 |
|
| 1836 |
/* C3.5.8 Data-processing (2 source)
|
| 1837 |
* 31 30 29 28 21 20 16 15 10 9 5 4 0
|
| 1838 |
* +----+---+---+-----------------+------+--------+------+------+
|
| 1839 |
* | sf | 0 | S | 1 1 0 1 0 1 1 0 | Rm | opcode | Rn | Rd |
|
| 1840 |
* +----+---+---+-----------------+------+--------+------+------+
|
| 1841 |
*/
|
| 1842 |
static void disas_data_proc_2src(DisasContext *s, uint32_t insn) |
| 1843 |
{
|
| 1844 |
unsigned int sf, rm, opcode, rn, rd; |
| 1845 |
sf = extract32(insn, 31, 1); |
| 1846 |
rm = extract32(insn, 16, 5); |
| 1847 |
opcode = extract32(insn, 10, 6); |
| 1848 |
rn = extract32(insn, 5, 5); |
| 1849 |
rd = extract32(insn, 0, 5); |
| 1850 |
|
| 1851 |
if (extract32(insn, 29, 1)) { |
| 1852 |
unallocated_encoding(s); |
| 1853 |
return;
|
| 1854 |
} |
| 1855 |
|
| 1856 |
switch (opcode) {
|
| 1857 |
case 2: /* UDIV */ |
| 1858 |
handle_div(s, false, sf, rm, rn, rd);
|
| 1859 |
break;
|
| 1860 |
case 3: /* SDIV */ |
| 1861 |
handle_div(s, true, sf, rm, rn, rd);
|
| 1862 |
break;
|
| 1863 |
case 8: /* LSLV */ |
| 1864 |
handle_shift_reg(s, A64_SHIFT_TYPE_LSL, sf, rm, rn, rd); |
| 1865 |
break;
|
| 1866 |
case 9: /* LSRV */ |
| 1867 |
handle_shift_reg(s, A64_SHIFT_TYPE_LSR, sf, rm, rn, rd); |
| 1868 |
break;
|
| 1869 |
case 10: /* ASRV */ |
| 1870 |
handle_shift_reg(s, A64_SHIFT_TYPE_ASR, sf, rm, rn, rd); |
| 1871 |
break;
|
| 1872 |
case 11: /* RORV */ |
| 1873 |
handle_shift_reg(s, A64_SHIFT_TYPE_ROR, sf, rm, rn, rd); |
| 1874 |
break;
|
| 1875 |
case 16: |
| 1876 |
case 17: |
| 1877 |
case 18: |
| 1878 |
case 19: |
| 1879 |
case 20: |
| 1880 |
case 21: |
| 1881 |
case 22: |
| 1882 |
case 23: /* CRC32 */ |
| 1883 |
unsupported_encoding(s, insn); |
| 1884 |
break;
|
| 1885 |
default:
|
| 1886 |
unallocated_encoding(s); |
| 1887 |
break;
|
| 1888 |
} |
| 1889 |
} |
| 1890 |
|
| 1891 |
/* C3.5 Data processing - register */
|
| 1892 |
static void disas_data_proc_reg(DisasContext *s, uint32_t insn) |
| 1893 |
{
|
| 1894 |
switch (extract32(insn, 24, 5)) { |
| 1895 |
case 0x0a: /* Logical (shifted register) */ |
| 1896 |
disas_logic_reg(s, insn); |
| 1897 |
break;
|
| 1898 |
case 0x0b: /* Add/subtract */ |
| 1899 |
if (insn & (1 << 21)) { /* (extended register) */ |
| 1900 |
disas_add_sub_ext_reg(s, insn); |
| 1901 |
} else {
|
| 1902 |
disas_add_sub_reg(s, insn); |
| 1903 |
} |
| 1904 |
break;
|
| 1905 |
case 0x1b: /* Data-processing (3 source) */ |
| 1906 |
disas_data_proc_3src(s, insn); |
| 1907 |
break;
|
| 1908 |
case 0x1a: |
| 1909 |
switch (extract32(insn, 21, 3)) { |
| 1910 |
case 0x0: /* Add/subtract (with carry) */ |
| 1911 |
disas_adc_sbc(s, insn); |
| 1912 |
break;
|
| 1913 |
case 0x2: /* Conditional compare */ |
| 1914 |
if (insn & (1 << 11)) { /* (immediate) */ |
| 1915 |
disas_cc_imm(s, insn); |
| 1916 |
} else { /* (register) */ |
| 1917 |
disas_cc_reg(s, insn); |
| 1918 |
} |
| 1919 |
break;
|
| 1920 |
case 0x4: /* Conditional select */ |
| 1921 |
disas_cond_select(s, insn); |
| 1922 |
break;
|
| 1923 |
case 0x6: /* Data-processing */ |
| 1924 |
if (insn & (1 << 30)) { /* (1 source) */ |
| 1925 |
disas_data_proc_1src(s, insn); |
| 1926 |
} else { /* (2 source) */ |
| 1927 |
disas_data_proc_2src(s, insn); |
| 1928 |
} |
| 1929 |
break;
|
| 1930 |
default:
|
| 1931 |
unallocated_encoding(s); |
| 1932 |
break;
|
| 1933 |
} |
| 1934 |
break;
|
| 1935 |
default:
|
| 1936 |
unallocated_encoding(s); |
| 1937 |
break;
|
| 1938 |
} |
| 1939 |
} |
| 1940 |
|
| 1941 |
/* C3.6 Data processing - SIMD and floating point */
|
| 1942 |
static void disas_data_proc_simd_fp(DisasContext *s, uint32_t insn) |
| 1943 |
{
|
| 1944 |
unsupported_encoding(s, insn); |
| 1945 |
} |
| 1946 |
|
| 1947 |
/* C3.1 A64 instruction index by encoding */
|
| 1948 |
static void disas_a64_insn(CPUARMState *env, DisasContext *s) |
| 1949 |
{
|
| 1950 |
uint32_t insn; |
| 1951 |
|
| 1952 |
insn = arm_ldl_code(env, s->pc, s->bswap_code); |
| 1953 |
s->insn = insn; |
| 1954 |
s->pc += 4;
|
| 1955 |
|
| 1956 |
switch (extract32(insn, 25, 4)) { |
| 1957 |
case 0x0: case 0x1: case 0x2: case 0x3: /* UNALLOCATED */ |
| 1958 |
unallocated_encoding(s); |
| 1959 |
break;
|
| 1960 |
case 0x8: case 0x9: /* Data processing - immediate */ |
| 1961 |
disas_data_proc_imm(s, insn); |
| 1962 |
break;
|
| 1963 |
case 0xa: case 0xb: /* Branch, exception generation and system insns */ |
| 1964 |
disas_b_exc_sys(s, insn); |
| 1965 |
break;
|
| 1966 |
case 0x4: |
| 1967 |
case 0x6: |
| 1968 |
case 0xc: |
| 1969 |
case 0xe: /* Loads and stores */ |
| 1970 |
disas_ldst(s, insn); |
| 1971 |
break;
|
| 1972 |
case 0x5: |
| 1973 |
case 0xd: /* Data processing - register */ |
| 1974 |
disas_data_proc_reg(s, insn); |
| 1975 |
break;
|
| 1976 |
case 0x7: |
| 1977 |
case 0xf: /* Data processing - SIMD and floating point */ |
| 1978 |
disas_data_proc_simd_fp(s, insn); |
| 1979 |
break;
|
| 1980 |
default:
|
| 1981 |
assert(FALSE); /* all 15 cases should be handled above */
|
| 1982 |
break;
|
| 1983 |
} |
| 1984 |
|
| 1985 |
/* if we allocated any temporaries, free them here */
|
| 1986 |
free_tmp_a64(s); |
| 1987 |
} |
| 1988 |
|
| 1989 |
void gen_intermediate_code_internal_a64(ARMCPU *cpu,
|
| 1990 |
TranslationBlock *tb, |
| 1991 |
bool search_pc)
|
| 1992 |
{
|
| 1993 |
CPUState *cs = CPU(cpu); |
| 1994 |
CPUARMState *env = &cpu->env; |
| 1995 |
DisasContext dc1, *dc = &dc1; |
| 1996 |
CPUBreakpoint *bp; |
| 1997 |
uint16_t *gen_opc_end; |
| 1998 |
int j, lj;
|
| 1999 |
target_ulong pc_start; |
| 2000 |
target_ulong next_page_start; |
| 2001 |
int num_insns;
|
| 2002 |
int max_insns;
|
| 2003 |
|
| 2004 |
pc_start = tb->pc; |
| 2005 |
|
| 2006 |
dc->tb = tb; |
| 2007 |
|
| 2008 |
gen_opc_end = tcg_ctx.gen_opc_buf + OPC_MAX_SIZE; |
| 2009 |
|
| 2010 |
dc->is_jmp = DISAS_NEXT; |
| 2011 |
dc->pc = pc_start; |
| 2012 |
dc->singlestep_enabled = cs->singlestep_enabled; |
| 2013 |
dc->condjmp = 0;
|
| 2014 |
|
| 2015 |
dc->aarch64 = 1;
|
| 2016 |
dc->thumb = 0;
|
| 2017 |
dc->bswap_code = 0;
|
| 2018 |
dc->condexec_mask = 0;
|
| 2019 |
dc->condexec_cond = 0;
|
| 2020 |
#if !defined(CONFIG_USER_ONLY)
|
| 2021 |
dc->user = 0;
|
| 2022 |
#endif
|
| 2023 |
dc->vfp_enabled = 0;
|
| 2024 |
dc->vec_len = 0;
|
| 2025 |
dc->vec_stride = 0;
|
| 2026 |
|
| 2027 |
init_tmp_a64_array(dc); |
| 2028 |
|
| 2029 |
next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE; |
| 2030 |
lj = -1;
|
| 2031 |
num_insns = 0;
|
| 2032 |
max_insns = tb->cflags & CF_COUNT_MASK; |
| 2033 |
if (max_insns == 0) { |
| 2034 |
max_insns = CF_COUNT_MASK; |
| 2035 |
} |
| 2036 |
|
| 2037 |
gen_tb_start(); |
| 2038 |
|
| 2039 |
tcg_clear_temp_count(); |
| 2040 |
|
| 2041 |
do {
|
| 2042 |
if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
|
| 2043 |
QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
|
| 2044 |
if (bp->pc == dc->pc) {
|
| 2045 |
gen_exception_insn(dc, 0, EXCP_DEBUG);
|
| 2046 |
/* Advance PC so that clearing the breakpoint will
|
| 2047 |
invalidate this TB. */
|
| 2048 |
dc->pc += 2;
|
| 2049 |
goto done_generating;
|
| 2050 |
} |
| 2051 |
} |
| 2052 |
} |
| 2053 |
|
| 2054 |
if (search_pc) {
|
| 2055 |
j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf; |
| 2056 |
if (lj < j) {
|
| 2057 |
lj++; |
| 2058 |
while (lj < j) {
|
| 2059 |
tcg_ctx.gen_opc_instr_start[lj++] = 0;
|
| 2060 |
} |
| 2061 |
} |
| 2062 |
tcg_ctx.gen_opc_pc[lj] = dc->pc; |
| 2063 |
tcg_ctx.gen_opc_instr_start[lj] = 1;
|
| 2064 |
tcg_ctx.gen_opc_icount[lj] = num_insns; |
| 2065 |
} |
| 2066 |
|
| 2067 |
if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO)) { |
| 2068 |
gen_io_start(); |
| 2069 |
} |
| 2070 |
|
| 2071 |
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP | CPU_LOG_TB_OP_OPT))) {
|
| 2072 |
tcg_gen_debug_insn_start(dc->pc); |
| 2073 |
} |
| 2074 |
|
| 2075 |
disas_a64_insn(env, dc); |
| 2076 |
|
| 2077 |
if (tcg_check_temp_count()) {
|
| 2078 |
fprintf(stderr, "TCG temporary leak before "TARGET_FMT_lx"\n", |
| 2079 |
dc->pc); |
| 2080 |
} |
| 2081 |
|
| 2082 |
/* Translation stops when a conditional branch is encountered.
|
| 2083 |
* Otherwise the subsequent code could get translated several times.
|
| 2084 |
* Also stop translation when a page boundary is reached. This
|
| 2085 |
* ensures prefetch aborts occur at the right place.
|
| 2086 |
*/
|
| 2087 |
num_insns++; |
| 2088 |
} while (!dc->is_jmp && tcg_ctx.gen_opc_ptr < gen_opc_end &&
|
| 2089 |
!cs->singlestep_enabled && |
| 2090 |
!singlestep && |
| 2091 |
dc->pc < next_page_start && |
| 2092 |
num_insns < max_insns); |
| 2093 |
|
| 2094 |
if (tb->cflags & CF_LAST_IO) {
|
| 2095 |
gen_io_end(); |
| 2096 |
} |
| 2097 |
|
| 2098 |
if (unlikely(cs->singlestep_enabled) && dc->is_jmp != DISAS_EXC) {
|
| 2099 |
/* Note that this means single stepping WFI doesn't halt the CPU.
|
| 2100 |
* For conditional branch insns this is harmless unreachable code as
|
| 2101 |
* gen_goto_tb() has already handled emitting the debug exception
|
| 2102 |
* (and thus a tb-jump is not possible when singlestepping).
|
| 2103 |
*/
|
| 2104 |
assert(dc->is_jmp != DISAS_TB_JUMP); |
| 2105 |
if (dc->is_jmp != DISAS_JUMP) {
|
| 2106 |
gen_a64_set_pc_im(dc->pc); |
| 2107 |
} |
| 2108 |
gen_exception(EXCP_DEBUG); |
| 2109 |
} else {
|
| 2110 |
switch (dc->is_jmp) {
|
| 2111 |
case DISAS_NEXT:
|
| 2112 |
gen_goto_tb(dc, 1, dc->pc);
|
| 2113 |
break;
|
| 2114 |
default:
|
| 2115 |
case DISAS_JUMP:
|
| 2116 |
case DISAS_UPDATE:
|
| 2117 |
/* indicate that the hash table must be used to find the next TB */
|
| 2118 |
tcg_gen_exit_tb(0);
|
| 2119 |
break;
|
| 2120 |
case DISAS_TB_JUMP:
|
| 2121 |
case DISAS_EXC:
|
| 2122 |
case DISAS_SWI:
|
| 2123 |
break;
|
| 2124 |
case DISAS_WFI:
|
| 2125 |
/* This is a special case because we don't want to just halt the CPU
|
| 2126 |
* if trying to debug across a WFI.
|
| 2127 |
*/
|
| 2128 |
gen_helper_wfi(cpu_env); |
| 2129 |
break;
|
| 2130 |
} |
| 2131 |
} |
| 2132 |
|
| 2133 |
done_generating:
|
| 2134 |
gen_tb_end(tb, num_insns); |
| 2135 |
*tcg_ctx.gen_opc_ptr = INDEX_op_end; |
| 2136 |
|
| 2137 |
#ifdef DEBUG_DISAS
|
| 2138 |
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
|
| 2139 |
qemu_log("----------------\n");
|
| 2140 |
qemu_log("IN: %s\n", lookup_symbol(pc_start));
|
| 2141 |
log_target_disas(env, pc_start, dc->pc - pc_start, |
| 2142 |
dc->thumb | (dc->bswap_code << 1));
|
| 2143 |
qemu_log("\n");
|
| 2144 |
} |
| 2145 |
#endif
|
| 2146 |
if (search_pc) {
|
| 2147 |
j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf; |
| 2148 |
lj++; |
| 2149 |
while (lj <= j) {
|
| 2150 |
tcg_ctx.gen_opc_instr_start[lj++] = 0;
|
| 2151 |
} |
| 2152 |
} else {
|
| 2153 |
tb->size = dc->pc - pc_start; |
| 2154 |
tb->icount = num_insns; |
| 2155 |
} |
| 2156 |
} |