diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2023-10-23 08:52:36 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2023-12-29 22:03:59 +0100 |
| commit | 3497f1646f603c396248451c6df8f9d979060351 (patch) | |
| tree | fb58abd09a997563b369ea6bb6db92180741ad8b | |
| parent | 9a5922d6bdc3e047fbe52178104f9b06604f901a (diff) | |
target/i386: prepare for implementation of STOS/SCAS in new decoder
Do not use gen_op, and pull the load from the accumulator into
disas_insn.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | target/i386/tcg/translate.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c index e5f7117096..ecbd80a19a 100644 --- a/target/i386/tcg/translate.c +++ b/target/i386/tcg/translate.c @@ -1264,7 +1264,6 @@ static TCGLabel *gen_jz_ecx_string(DisasContext *s) static void gen_stos(DisasContext *s, MemOp ot) { - gen_op_mov_v_reg(s, MO_32, s->T0, R_EAX); gen_string_movl_A0_EDI(s); gen_op_st_v(s, ot, s->T0, s->A0); gen_op_add_reg(s, s->aflag, R_EDI, gen_compute_Dshift(s, ot)); @@ -1282,7 +1281,11 @@ static void gen_scas(DisasContext *s, MemOp ot) { gen_string_movl_A0_EDI(s); gen_op_ld_v(s, ot, s->T1, s->A0); - gen_op(s, OP_CMPL, ot, R_EAX); + tcg_gen_mov_tl(cpu_cc_src, s->T1); + tcg_gen_mov_tl(s->cc_srcT, s->T0); + tcg_gen_sub_tl(cpu_cc_dst, s->T0, s->T1); + set_cc_op(s, CC_OP_SUBB + ot); + gen_op_add_reg(s, s->aflag, R_EDI, gen_compute_Dshift(s, ot)); } @@ -4952,6 +4955,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu) case 0xaa: /* stosS */ case 0xab: ot = mo_b_d(b, dflag); + gen_op_mov_v_reg(s, MO_32, s->T0, R_EAX); if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) { gen_repz_stos(s, ot); } else { @@ -4970,6 +4974,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu) case 0xae: /* scasS */ case 0xaf: ot = mo_b_d(b, dflag); + gen_op_mov_v_reg(s, MO_32, s->T0, R_EAX); if (prefixes & PREFIX_REPNZ) { gen_repz_scas(s, ot, 1); } else if (prefixes & PREFIX_REPZ) { |