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gen-icount: Synchronize with qemu

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Lioncash 2019-04-22 05:52:41 -04:00
parent 96c52ea053
commit 9f0e469142
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 31 additions and 27 deletions
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58
qemu/include/exec/gen-icount.h
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@ -6,12 +6,10 @@
/* Helpers for instruction counting code generation. */
//static TCGOp *icount_start_insn;
//static TCGLabel *icount_label;
//static TCGLabel *exitreq_label;
static inline void gen_tb_start(TCGContext *tcg_ctx, TranslationBlock *tb)
{
//TCGv_i32 count, flag, imm;
//TCGv_i32 count, imm;
TCGv_i32 flag;
tcg_ctx->exitreq_label = gen_new_label(tcg_ctx);
@ -22,45 +20,51 @@ static inline void gen_tb_start(TCGContext *tcg_ctx, TranslationBlock *tb)
tcg_temp_free_i32(tcg_ctx, flag);
#if 0
if (!(tb->cflags & CF_USE_ICOUNT))
return;
tcg_ctx->exitreq_label = gen_new_label();
if (tb_cflags(tb) & CF_USE_ICOUNT) {
count = tcg_temp_local_new_i32();
} else {
count = tcg_temp_new_i32();
}
icount_label = gen_new_label(tcg_ctx);
count = tcg_temp_local_new_i32(tcg_ctx);
tcg_gen_ld_i32(tcg_ctx, count, tcg_ctx->tcg_env,
tcg_gen_ld_i32(count, cpu_env,
-ENV_OFFSET + offsetof(CPUState, icount_decr.u32));
imm = tcg_temp_new_i32(tcg_ctx);
/* We emit a movi with a dummy immediate argument. Keep the insn index
* of the movi so that we later (when we know the actual insn count)
* can update the immediate argument with the actual insn count. */
icount_start_insn = tcg_last_op(tcg_ctx);
tcg_gen_movi_i32(tcg_ctx, imm, 0xdeadbeef);
tcg_gen_sub_i32(tcg_ctx, count, count, imm);
tcg_temp_free_i32(tcg_ctx, imm);
if (tb_cflags(tb) & CF_USE_ICOUNT) {
imm = tcg_temp_new_i32();
/* We emit a movi with a dummy immediate argument. Keep the insn index
* of the movi so that we later (when we know the actual insn count)
* can update the immediate argument with the actual insn count. */
tcg_gen_movi_i32(imm, 0xdeadbeef);
icount_start_insn = tcg_last_op();
tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_LT, count, 0, icount_label);
tcg_gen_st16_i32(tcg_ctx, count, tcg_ctx->tcg_env,
-ENV_OFFSET + offsetof(CPUState, icount_decr.u16.low));
tcg_temp_free_i32(tcg_ctx, count);
tcg_gen_sub_i32(count, count, imm);
tcg_temp_free_i32(imm);
}
tcg_gen_brcondi_i32(TCG_COND_LT, count, 0, tcg_ctx->exitreq_label);
if (tb_cflags(tb) & CF_USE_ICOUNT) {
tcg_gen_st16_i32(count, cpu_env,
-ENV_OFFSET + offsetof(CPUState, icount_decr.u16.low));
}
tcg_temp_free_i32(count);
#endif
}
static inline void gen_tb_end(TCGContext *tcg_ctx, TranslationBlock *tb, int num_insns)
{
gen_set_label(tcg_ctx, tcg_ctx->exitreq_label);
tcg_gen_exit_tb(tcg_ctx, tb, TB_EXIT_REQUESTED);
#if 0
if (tb->cflags & CF_USE_ICOUNT) {
if (tb_cflags(tb) & CF_USE_ICOUNT) {
/* Update the num_insn immediate parameter now that we know
* the actual insn count. */
tcg_set_insn_param(tcg_ctx->icount_start_insn, 1, num_insns);
gen_set_label(tcg_ctx, icount_label);
tcg_gen_exit_tb(tcg_ctx, (uintptr_t)tb + TB_EXIT_ICOUNT_EXPIRED);
tcg_set_insn_param(icount_start_insn, 1, num_insns);
}
#endif
gen_set_label(tcg_ctx, tcg_ctx->exitreq_label);
tcg_gen_exit_tb(tcg_ctx, tb, TB_EXIT_REQUESTED);
}
#if 0