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https://github.com/yuzu-emu/unicorn.git
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10e2b13650
Do the cast to uintptr_t within the helper, so that the compiler can type check the pointer argument. We can also do some more sanity checking of the index argument. Backports commit 07ea28b41830f946de3841b0ac61a3413679feb9 from qemu
83 lines
2.6 KiB
C
83 lines
2.6 KiB
C
#ifndef GEN_ICOUNT_H
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#define GEN_ICOUNT_H
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#include "qemu/timer.h"
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/* Helpers for instruction counting code generation. */
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//static TCGOp *icount_start_insn;
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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, TranslationBlock *tb)
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{
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//TCGv_i32 count, flag, imm;
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TCGv_i32 flag;
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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 (!(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, tcg_ctx->tcg_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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/* We emit a movi with a dummy immediate argument. Keep the insn index
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* of the movi so that we later (when we know the actual insn count)
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* can update the immediate argument with the actual insn count. */
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icount_start_insn = tcg_last_op(tcg_ctx);
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tcg_gen_movi_i32(tcg_ctx, imm, 0xdeadbeef);
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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, tcg_ctx->tcg_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, tb, TB_EXIT_REQUESTED);
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#if 0
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if (tb->cflags & CF_USE_ICOUNT) {
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/* Update the num_insn immediate parameter now that we know
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* the actual insn count. */
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tcg_set_insn_param(tcg_ctx->icount_start_insn, 1, num_insns);
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gen_set_label(tcg_ctx, icount_label);
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tcg_gen_exit_tb(tcg_ctx, (uintptr_t)tb + TB_EXIT_ICOUNT_EXPIRED);
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}
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#endif
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}
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#if 0
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static inline void gen_io_start(TCGContext *tcg_ctx)
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{
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TCGv_i32 tmp = tcg_const_i32(tcg_ctx, 1);
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tcg_gen_st_i32(tcg_ctx, tmp, tcg_ctx->tcg_env, -ENV_OFFSET + offsetof(CPUState, can_do_io));
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tcg_temp_free_i32(tcg_ctx, tmp);
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}
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static inline void gen_io_end(TCGContext *tcg_ctx)
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{
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TCGv_i32 tmp = tcg_const_i32(tcg_ctx, 0);
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tcg_gen_st_i32(tcg_ctx, tmp, tcg_ctx->tcg_env, -ENV_OFFSET + offsetof(CPUState, can_do_io));
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tcg_temp_free_i32(tcg_ctx, tmp);
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}
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#endif
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#endif
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