[x64] Fix REX prefix in shufps

src/x64/assembler-x64.cc

Index: src/x64/assembler-x64.cc
diff --git a/src/x64/assembler-x64.cc b/src/x64/assembler-x64.cc
index 5825b20e696a9c6bbfa77dbff9ae8a77a47b8e08..0f40c0808a4a6b496881f81f3f6c636197032e94 100644
--- a/src/x64/assembler-x64.cc
+++ b/src/x64/assembler-x64.cc
@@ -3034,7 +3034,7 @@ void Assembler::movaps(XMMRegister dst, XMMRegister src) {
 void Assembler::shufps(XMMRegister dst, XMMRegister src, byte imm8) {
   DCHECK(is_uint8(imm8));
   EnsureSpace ensure_space(this);
-  emit_optional_rex_32(src, dst);
+  emit_optional_rex_32(dst, src);
   emit(0x0F);
   emit(0xC6);
   emit_sse_operand(dst, src);