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target-i386: SSE4.2: fix pcmpgtq instruction

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The "Intel 64 and IA-32 Architectures Software Developer's Manual" (at
least recent versions) clearly says that the comparison is signed.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2013-03-26 19:56:01 +01:00
parent 34c6addd4b
commit da5156cd9a
1 changed files with 1 additions and 2 deletions
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target-i386/ops_sse.h
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@ -1933,8 +1933,7 @@ void glue(helper_mpsadbw, SUFFIX)(CPUX86State *env, Reg *d, Reg *s,
} }
/* SSE4.2 op helpers */ /* SSE4.2 op helpers */
/* it's unclear whether signed or unsigned */ #define FCMPGTQ(d, s) ((int64_t)d > (int64_t)s ? -1 : 0)
#define FCMPGTQ(d, s) (d > s ? -1 : 0)
SSE_HELPER_Q(helper_pcmpgtq, FCMPGTQ) SSE_HELPER_Q(helper_pcmpgtq, FCMPGTQ)
static inline int pcmp_elen(CPUX86State *env, int reg, uint32_t ctrl) static inline int pcmp_elen(CPUX86State *env, int reg, uint32_t ctrl)