[x64] Make use of vxorpd when AVX is enabled.

src/x64/macro-assembler-x64.cc

 // Copyright 2012 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/base/division-by-constant.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 775 matching lines @@
   }
 }
 
 
 void MacroAssembler::Cvtlsi2sd(XMMRegister dst, Register src) {
   if (CpuFeatures::IsSupported(AVX)) {
     CpuFeatureScope scope(this, AVX);
     vxorpd(dst, dst, dst);
     vcvtlsi2sd(dst, dst, src);
   } else {
-    xorps(dst, dst);
+    xorpd(dst, dst);
     cvtlsi2sd(dst, src);
   }
 }
 
 
 void MacroAssembler::Cvtlsi2sd(XMMRegister dst, const Operand& src) {
   if (CpuFeatures::IsSupported(AVX)) {
     CpuFeatureScope scope(this, AVX);
     vxorpd(dst, dst, dst);
     vcvtlsi2sd(dst, dst, src);
   } else {
-    xorps(dst, dst);
+    xorpd(dst, dst);
     cvtlsi2sd(dst, src);
   }
 }
 
 
 void MacroAssembler::Load(Register dst, const Operand& src, Representation r) {
   DCHECK(!r.IsDouble());
   if (r.IsInteger8()) {
     movsxbq(dst, src);
   } else if (r.IsUInteger8()) {
@@ skipping 1579 matching lines @@
     Move(dst, Smi::cast(*source));
   } else {
     MoveHeapObject(kScratchRegister, source);
     movp(dst, kScratchRegister);
   }
 }
 
 
 void MacroAssembler::Move(XMMRegister dst, uint32_t src) {
   if (src == 0) {
-    xorps(dst, dst);
+    Xorpd(dst, dst);
   } else {
     unsigned pop = base::bits::CountPopulation32(src);
     DCHECK_NE(0u, pop);
     if (pop == 32) {
       pcmpeqd(dst, dst);
     } else {
       movl(kScratchRegister, Immediate(src));
       Movq(dst, kScratchRegister);
     }
   }
 }
 
 
 void MacroAssembler::Move(XMMRegister dst, uint64_t src) {
   if (src == 0) {
-    xorps(dst, dst);
+    Xorpd(dst, dst);
   } else {
     unsigned nlz = base::bits::CountLeadingZeros64(src);
     unsigned ntz = base::bits::CountTrailingZeros64(src);
     unsigned pop = base::bits::CountPopulation64(src);
     DCHECK_NE(0u, pop);
     if (pop == 64) {
       pcmpeqd(dst, dst);
     } else if (pop + ntz == 64) {
       pcmpeqd(dst, dst);
       psllq(dst, ntz);
@@ skipping 97 matching lines @@
 void MacroAssembler::Movq(Register dst, XMMRegister src) {
   if (CpuFeatures::IsSupported(AVX)) {
     CpuFeatureScope scope(this, AVX);
     vmovq(dst, src);
   } else {
     movq(dst, src);
   }
 }
 
 
+void MacroAssembler::Xorpd(XMMRegister dst, XMMRegister src) {
+  if (CpuFeatures::IsSupported(AVX)) {
+    CpuFeatureScope scope(this, AVX);
+    vxorpd(dst, dst, src);
+  } else {
+    xorpd(dst, src);
+  }
+}
+
+
 void MacroAssembler::Cmp(Register dst, Handle<Object> source) {
   AllowDeferredHandleDereference smi_check;
   if (source->IsSmi()) {
     Cmp(dst, Smi::cast(*source));
   } else {
     MoveHeapObject(kScratchRegister, source);
     cmpp(dst, kScratchRegister);
   }
 }
 
@@ skipping 655 matching lines @@
   decb(reg);  // 0 if negative, 255 if positive.
   bind(&done);
 }
 
 
 void MacroAssembler::ClampDoubleToUint8(XMMRegister input_reg,
                                         XMMRegister temp_xmm_reg,
                                         Register result_reg) {
   Label done;
   Label conv_failure;
-  xorps(temp_xmm_reg, temp_xmm_reg);
+  Xorpd(temp_xmm_reg, temp_xmm_reg);
   cvtsd2si(result_reg, input_reg);
   testl(result_reg, Immediate(0xFFFFFF00));
   j(zero, &done, Label::kNear);
   cmpl(result_reg, Immediate(1));
   j(overflow, &conv_failure, Label::kNear);
   movl(result_reg, Immediate(0));
   setcc(sign, result_reg);
   subl(result_reg, Immediate(1));
   andl(result_reg, Immediate(255));
   jmp(&done, Label::kNear);
@@ skipping 1903 matching lines @@
   movl(rax, dividend);
   shrl(rax, Immediate(31));
   addl(rdx, rax);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64