Commit 93e3c0ae authored by Aurelien Jarno's avatar Aurelien Jarno
Browse files

target-i386: SSE4.2: fix pcmpXstri instructions 



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: default avatarRichard Henderson <rth@twiddle.net>
Signed-off-by: default avatarAurelien Jarno <aurelien@aurel32.net>
parent da5156cd

target-i386/ops_sse.h

+2 −2
Original line number Diff line number Diff line
@@ -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));

    }