[x64] Emit vmovss when AVX is enabled.

src/x64/lithium-codegen-x64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/hydrogen-osr.h"
@@ skipping 4225 matching lines @@
   Operand operand(BuildFastArrayOperand(
       instr->elements(),
       key,
       instr->hydrogen()->key()->representation(),
       elements_kind,
       instr->base_offset()));
 
   if (elements_kind == FLOAT32_ELEMENTS) {
     XMMRegister value(ToDoubleRegister(instr->value()));
     __ Cvtsd2ss(value, value);
-    __ movss(operand, value);
+    __ Movss(operand, value);
   } else if (elements_kind == FLOAT64_ELEMENTS) {
     __ Movsd(operand, ToDoubleRegister(instr->value()));
   } else {
     Register value(ToRegister(instr->value()));
     switch (elements_kind) {
       case INT8_ELEMENTS:
       case UINT8_ELEMENTS:
       case UINT8_CLAMPED_ELEMENTS:
         __ movb(operand, value);
         break;
@@ skipping 1647 matching lines @@
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64