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[PULL 18/21] target/i386: REPZ and REPNZ are mutually exclusive


From: Paolo Bonzini
Subject: [PULL 18/21] target/i386: REPZ and REPNZ are mutually exclusive
Date: Mon, 19 Sep 2022 19:34:46 +0200

The later prefix wins if both are present, make it show in s->prefix too.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/tcg/translate.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c
index 5f31a59fb8..eaa56b0f48 100644
--- a/target/i386/tcg/translate.c
+++ b/target/i386/tcg/translate.c
@@ -4733,9 +4733,11 @@ static target_ulong disas_insn(DisasContext *s, CPUState 
*cpu)
     switch (b) {
     case 0xf3:
         prefixes |= PREFIX_REPZ;
+        prefixes &= ~PREFIX_REPNZ;
         goto next_byte;
     case 0xf2:
         prefixes |= PREFIX_REPNZ;
+        prefixes &= ~PREFIX_REPZ;
         goto next_byte;
     case 0xf0:
         prefixes |= PREFIX_LOCK;
-- 
2.37.2




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