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target-i386: SSE4.2: fix pcmpXstri instructions

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ffs1 returns the first bit set to one starting counting from the most
significant bit.

pcmpXstri returns the most significant bit set to one, starting counting
from the least significant bit.

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 da5156cd9a
commit 93e3c0ae69
1 changed files with 2 additions and 2 deletions
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4
target-i386/ops_sse.h
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@ -2099,7 +2099,7 @@ void glue(helper_pcmpestri, SUFFIX)(CPUX86State *env, Reg *d, Reg *s,
pcmp_elen(env, R_EAX, ctrl));
if (res) {
env->regs[R_ECX] = ((ctrl & (1 << 6)) ? rffs1 : ffs1)(res) - 1;
env->regs[R_ECX] = (ctrl & (1 << 6)) ? rffs1(res) - 1 : 32 - ffs1(res);
} else {
env->regs[R_ECX] = 16 >> (ctrl & (1 << 0));
}
@ -2137,7 +2137,7 @@ void glue(helper_pcmpistri, SUFFIX)(CPUX86State *env, Reg *d, Reg *s,
pcmp_ilen(d, ctrl));
if (res) {
env->regs[R_ECX] = ((ctrl & (1 << 6)) ? rffs1 : ffs1)(res) - 1;
env->regs[R_ECX] = (ctrl & (1 << 6)) ? rffs1(res) - 1 : 32 - ffs1(res);
} else {
env->regs[R_ECX] = 16 >> (ctrl & (1 << 0));
}