Fix x64 assembler in roundsd and pxor.

runtime/vm/assembler_x64.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/heap.h"
 #include "vm/memory_region.h"
@@ skipping 1155 matching lines @@
 
 
 void Assembler::pxor(XmmRegister dst, XmmRegister src) {
   ASSERT(src <= XMM15);
   ASSERT(dst <= XMM15);
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitUint8(0x66);
   EmitREX_RB(dst, src);
   EmitUint8(0x0F);
   EmitUint8(0xEF);
-  EmitXmmRegisterOperand(dst, src);
+  EmitXmmRegisterOperand(dst & 7, src);
 }
 
 
 void Assembler::roundsd(XmmRegister dst, XmmRegister src, RoundingMode mode) {
   ASSERT(src <= XMM15);
   ASSERT(dst <= XMM15);
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitUint8(0x66);
   EmitREX_RB(dst, src);
   EmitUint8(0x0F);
   EmitUint8(0x3A);
   EmitUint8(0x0B);
-  EmitXmmRegisterOperand(dst, src);
+  EmitXmmRegisterOperand(dst & 7, src);
   // Mask precision exeption.
   EmitUint8(static_cast<uint8_t>(mode) | 0x8);
 }
 
 
 void Assembler::fldl(const Address& src) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitUint8(0xDD);
   EmitOperand(0, src);
 }
@@ skipping 1679 matching lines @@
 
 
 const char* Assembler::FpuRegisterName(FpuRegister reg) {
   ASSERT((0 <= reg) && (reg < kNumberOfXmmRegisters));
   return xmm_reg_names[reg];
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64