target/i386: Reduce DisasContext.prefix to uint8_t

The highest bit in this set is 0x40 (PREFIX_REX).

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210514151342.384376-23-richard.henderson@linaro.org>

diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c
index 44a2885..61c0573 100644 (file)
--- a/target/i386/tcg/translate.c
+++ b/target/i386/tcg/translate.c
@@ -78,7 +78,7 @@ typedef struct DisasContext {
 
     /* current insn context */
     int8_t override; /* -1 if no override, else R_CS, R_DS, etc */
-    int prefix;
+    uint8_t prefix;
     MemOp aflag;
     MemOp dflag;
     target_ulong pc_start;