mirror of
https://github.com/yuzu-emu/unicorn
synced 2024-11-25 22:28:14 +00:00
232632e76c
This is improved type checking for the translators -- it's no longer possible to accidentally swap arguments to the branch functions. Note that the code generating backends still manipulate labels as int. With notable exceptions, the scope of the change is just a few lines for each target, so it's not worth building extra machinery to do this change in per-target increments. Backports commit 42a268c241183877192c376d03bd9b6d527407c7 from qemu
87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
#ifndef GEN_ICOUNT_H
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#define GEN_ICOUNT_H 1
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#include "qemu/timer.h"
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/* Helpers for instruction counting code generation. */
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//static TCGArg *icount_arg;
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//static TCGLabel *icount_label;
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//static TCGLabel *exitreq_label;
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static inline void gen_tb_start(TCGContext *tcg_ctx)
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{
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//TCGv_i32 count, flag, imm;
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TCGv_i32 flag;
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//int i;
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tcg_ctx->exitreq_label = gen_new_label(tcg_ctx);
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flag = tcg_temp_new_i32(tcg_ctx);
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tcg_gen_ld_i32(tcg_ctx, flag, tcg_ctx->cpu_env,
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offsetof(CPUState, tcg_exit_req) - ENV_OFFSET);
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tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_NE, flag, 0, tcg_ctx->exitreq_label);
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tcg_temp_free_i32(tcg_ctx, flag);
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#if 0
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if (!(s->tb->cflags & CF_USE_ICOUNT)) {
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return;
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}
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icount_label = gen_new_label(tcg_ctx);
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count = tcg_temp_local_new_i32(tcg_ctx);
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tcg_gen_ld_i32(tcg_ctx, count, cpu_env,
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-ENV_OFFSET + offsetof(CPUState, icount_decr.u32));
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imm = tcg_temp_new_i32(tcg_ctx);
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tcg_gen_movi_i32(tcg_ctx, imm, 0xdeadbeef);
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/* This is a horrid hack to allow fixing up the value later. */
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i = *tcg_ctx->gen_last_op_idx;
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i = *tcg_ctx->gen_op_buf[i].args;
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icount_arg = &tcg_ctx->gen_opparam_buf[i + 1];
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tcg_gen_sub_i32(tcg_ctx, count, count, imm);
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tcg_temp_free_i32(tcg_ctx, imm);
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tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_LT, count, 0, icount_label);
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tcg_gen_st16_i32(tcg_ctx, count, cpu_env,
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-ENV_OFFSET + offsetof(CPUState, icount_decr.u16.low));
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tcg_temp_free_i32(tcg_ctx, count);
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#endif
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}
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static inline void gen_tb_end(TCGContext *tcg_ctx, TranslationBlock *tb, int num_insns)
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{
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gen_set_label(tcg_ctx, tcg_ctx->exitreq_label);
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tcg_gen_exit_tb(tcg_ctx, (uintptr_t)tb + TB_EXIT_REQUESTED);
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#if 0
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if (use_icount) {
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*icount_arg = num_insns;
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gen_set_label(icount_label);
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tcg_gen_exit_tb((uintptr_t)tb + TB_EXIT_ICOUNT_EXPIRED);
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}
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#endif
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/* Terminate the linked list. */
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tcg_ctx->gen_op_buf[tcg_ctx->gen_last_op_idx].next = -1;
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}
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#if 0
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static inline void gen_io_start(void)
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{
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TCGv_i32 tmp = tcg_const_i32(1);
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tcg_gen_st_i32(tmp, cpu_env, -ENV_OFFSET + offsetof(CPUState, can_do_io));
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tcg_temp_free_i32(tmp);
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}
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static inline void gen_io_end(void)
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{
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TCGv_i32 tmp = tcg_const_i32(0);
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tcg_gen_st_i32(tmp, cpu_env, -ENV_OFFSET + offsetof(CPUState, can_do_io));
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tcg_temp_free_i32(tmp);
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}
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#endif
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#endif
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