Implement some intrinsics on x64, fix a bug in ia32 intrinciscs (must return false if there is a fa…

runtime/vm/assembler_x64.cc

 // Copyright (c) 2011, 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 506 matching lines @@
   ASSERT(src <= XMM7);
   ASSERT(dst <= XMM7);
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitUint8(0xF2);
   EmitUint8(0x0F);
   EmitUint8(0x5E);
   EmitXmmRegisterOperand(dst, src);
 }
 
 
+void Assembler::comisd(XmmRegister a, XmmRegister b) {
+  ASSERT(a <= XMM7);
+  ASSERT(b <= XMM7);
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x2F);
+  EmitXmmRegisterOperand(a, b);
+}
+
+
 void Assembler::xchgl(Register dst, Register src) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   Operand operand(src);
   EmitOperandREX(dst, operand, REX_NONE);
   EmitUint8(0x87);
   EmitOperand(dst & 7, operand);
 }
 
 
 void Assembler::xchgq(Register dst, Register src) {
@@ skipping 1005 matching lines @@
     comments.SetCommentAt(i, comments_[i]->comment());
   }
 
   return comments;
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64