From 944f4001346019a3cd05567695aa48830c904626 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Thu, 20 Jun 2024 11:07:39 +0200 Subject: [PATCH] target/i386: use cpu_cc_dst for CC_OP_POPCNT It is the only CCOp, among those that compute ZF from one of the cc_op_* registers, that uses cpu_cc_src. Do not make it the odd one off, instead use cpu_cc_dst like the others. Reviewed-by: Richard Henderson Signed-off-by: Paolo Bonzini --- target/i386/cpu.h | 2 +- target/i386/tcg/cc_helper.c | 2 +- target/i386/tcg/emit.c.inc | 4 ++-- target/i386/tcg/translate.c | 4 ++-- 4 files changed, 6 insertions(+), 6 deletions(-) diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 52571ababe..1b4edbe058 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -1332,7 +1332,7 @@ typedef enum { CC_OP_BMILGQ, CC_OP_CLR, /* Z set, all other flags clear. */ - CC_OP_POPCNT, /* Z via CC_SRC, all other flags clear. */ + CC_OP_POPCNT, /* Z via CC_DST, all other flags clear. */ CC_OP_NB, } CCOp; diff --git a/target/i386/tcg/cc_helper.c b/target/i386/tcg/cc_helper.c index f76e9cb8cf..301ed95406 100644 --- a/target/i386/tcg/cc_helper.c +++ b/target/i386/tcg/cc_helper.c @@ -107,7 +107,7 @@ target_ulong helper_cc_compute_all(target_ulong dst, target_ulong src1, case CC_OP_CLR: return CC_Z | CC_P; case CC_OP_POPCNT: - return src1 ? 0 : CC_Z; + return dst ? 0 : CC_Z; case CC_OP_MULB: return compute_all_mulb(dst, src1); diff --git a/target/i386/tcg/emit.c.inc b/target/i386/tcg/emit.c.inc index 11faa70b5e..fc7477833b 100644 --- a/target/i386/tcg/emit.c.inc +++ b/target/i386/tcg/emit.c.inc @@ -2804,10 +2804,10 @@ static void gen_POPA(DisasContext *s, X86DecodedInsn *decode) static void gen_POPCNT(DisasContext *s, X86DecodedInsn *decode) { - decode->cc_src = tcg_temp_new(); + decode->cc_dst = tcg_temp_new(); decode->cc_op = CC_OP_POPCNT; - tcg_gen_mov_tl(decode->cc_src, s->T0); + tcg_gen_mov_tl(decode->cc_dst, s->T0); tcg_gen_ctpop_tl(s->T0, s->T0); } diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c index ad1819815a..eb353dc3c9 100644 --- a/target/i386/tcg/translate.c +++ b/target/i386/tcg/translate.c @@ -324,7 +324,7 @@ static const uint8_t cc_op_live[CC_OP_NB] = { [CC_OP_ADOX] = USES_CC_SRC | USES_CC_SRC2, [CC_OP_ADCOX] = USES_CC_DST | USES_CC_SRC | USES_CC_SRC2, [CC_OP_CLR] = 0, - [CC_OP_POPCNT] = USES_CC_SRC, + [CC_OP_POPCNT] = USES_CC_DST, }; static void set_cc_op_1(DisasContext *s, CCOp op, bool dirty) @@ -1020,7 +1020,7 @@ static CCPrepare gen_prepare_eflags_z(DisasContext *s, TCGv reg) case CC_OP_CLR: return (CCPrepare) { .cond = TCG_COND_ALWAYS }; case CC_OP_POPCNT: - return (CCPrepare) { .cond = TCG_COND_EQ, .reg = cpu_cc_src }; + return (CCPrepare) { .cond = TCG_COND_EQ, .reg = cpu_cc_dst }; default: { MemOp size = (s->cc_op - CC_OP_ADDB) & 3; -- 2.30.2