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cd538f0b7e
This is identical for each target. So, move the initialization to
common code. Move the variable itself out of tcg_ctx and name it
cpu_env to minimize changes within targets.
This also means we can remove tcg_global_reg_new_{ptr,i32,i64},
since there are no longer global-register temps created by targets.
Backports commit 1c2adb958fc07e5b3e81ed21b801c04a15f41f4f from qemu
83 lines
2.7 KiB
C
83 lines
2.7 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->uc->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(tb) & 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->uc->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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/* 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->uc->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 (tb_cflags(tb) & 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->uc->cpu_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->uc->cpu_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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