[x64] introduce vex prefix version of float64 arithmetic binop

test/unittests/compiler/x64/instruction-selector-x64-unittest.cc

 // Copyright 2014 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.
 
 #include "test/unittests/compiler/instruction-selector-unittest.h"
 
 #include "src/compiler/node-matchers.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 854 matching lines @@
     EXPECT_EQ(kX64Shl, s[0]->arch_opcode());
     ASSERT_EQ(2U, s[0]->InputCount());
     EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
     EXPECT_EQ(x, s.ToInt32(s[0]->InputAt(1)));
     ASSERT_EQ(1U, s[0]->OutputCount());
     EXPECT_TRUE(s.IsSameAsFirst(s[0]->Output()));
     EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
   }
 }
 
+
+TEST_F(InstructionSelectorTest, Float64BinopArithmetic) {
+  {
+    StreamBuilder m(this, kMachFloat64, kMachFloat64, kMachFloat64);
+    Node* add = m.Float64Add(m.Parameter(0), m.Parameter(1));
+    Node* mul = m.Float64Mul(add, m.Parameter(1));
+    Node* sub = m.Float64Sub(mul, add);
+    Node* ret = m.Float64Div(mul, sub);
+    m.Return(ret);
+    Stream s = m.Build(AVX);
+    ASSERT_EQ(4U, s.size());
+    EXPECT_EQ(kAVXFloat64Add, s[0]->arch_opcode());
+    EXPECT_EQ(kAVXFloat64Mul, s[1]->arch_opcode());
+    EXPECT_EQ(kAVXFloat64Sub, s[2]->arch_opcode());
+    EXPECT_EQ(kAVXFloat64Div, s[3]->arch_opcode());
+  }
+  {
+    StreamBuilder m(this, kMachFloat64, kMachFloat64, kMachFloat64);
+    Node* add = m.Float64Add(m.Parameter(0), m.Parameter(1));
+    Node* mul = m.Float64Mul(add, m.Parameter(1));
+    Node* sub = m.Float64Sub(mul, add);
+    Node* ret = m.Float64Div(mul, sub);
+    m.Return(ret);
+    Stream s = m.Build();
+    ASSERT_EQ(4U, s.size());
+    EXPECT_EQ(kSSEFloat64Add, s[0]->arch_opcode());
+    EXPECT_EQ(kSSEFloat64Mul, s[1]->arch_opcode());
+    EXPECT_EQ(kSSEFloat64Sub, s[2]->arch_opcode());
+    EXPECT_EQ(kSSEFloat64Div, s[3]->arch_opcode());
+  }
+}
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8