From 034668c329bb3e257a1f259571bd462938522e7a Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Sun, 18 Sep 2022 09:15:22 +0200 Subject: [PATCH] target/i386: correctly mask SSE4a bit indices in register operands SSE4a instructions EXTRQ and INSERTQ have two bit index operands, that can be immediates or taken from an XMM register. In both cases, the fields are 6-bit wide and the top two bits in the byte are ignored. translate.c is doing that correctly for the immediate case, but not for the XMM case, so fix it. Signed-off-by: Paolo Bonzini --- target/i386/ops_sse.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/target/i386/ops_sse.h b/target/i386/ops_sse.h index c0766de18d..3504bca36a 100644 --- a/target/i386/ops_sse.h +++ b/target/i386/ops_sse.h @@ -926,7 +926,7 @@ static inline uint64_t helper_extrq(uint64_t src, int shift, int len) void helper_extrq_r(CPUX86State *env, ZMMReg *d, ZMMReg *s) { - d->ZMM_Q(0) = helper_extrq(d->ZMM_Q(0), s->ZMM_B(1), s->ZMM_B(0)); + d->ZMM_Q(0) = helper_extrq(d->ZMM_Q(0), s->ZMM_B(1) & 63, s->ZMM_B(0) & 63); } void helper_extrq_i(CPUX86State *env, ZMMReg *d, int index, int length) @@ -948,7 +948,7 @@ static inline uint64_t helper_insertq(uint64_t src, int shift, int len) void helper_insertq_r(CPUX86State *env, ZMMReg *d, ZMMReg *s) { - d->ZMM_Q(0) = helper_insertq(s->ZMM_Q(0), s->ZMM_B(9), s->ZMM_B(8)); + d->ZMM_Q(0) = helper_insertq(s->ZMM_Q(0), s->ZMM_B(9) & 63, s->ZMM_B(8) & 63); } void helper_insertq_i(CPUX86State *env, ZMMReg *d, int index, int length)