[x64] introduce vex prefix version of float64 arithmetic binop

src/compiler/x64/instruction-codes-x64.h

 // 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.
 
 #ifndef V8_COMPILER_X64_INSTRUCTION_CODES_X64_H_
 #define V8_COMPILER_X64_INSTRUCTION_CODES_X64_H_
 
 namespace v8 {
 namespace internal {
 namespace compiler {
@@ skipping 44 matching lines @@
   V(SSEFloat64Sqrt)                \
   V(SSEFloat64Floor)               \
   V(SSEFloat64Ceil)                \
   V(SSEFloat64RoundTruncate)       \
   V(SSECvtss2sd)                   \
   V(SSECvtsd2ss)                   \
   V(SSEFloat64ToInt32)             \
   V(SSEFloat64ToUint32)            \
   V(SSEInt32ToFloat64)             \
   V(SSEUint32ToFloat64)            \
+  V(AVXFloat64Add)                 \

[Benedikt Meurer, 2014/11/27 14:31:07]

We should be smarter here, not having SSE and AVX versions, but only one
version. The instruction selector will do the SameAsFirst constraint if AVX is
not supported, and the CodeGenerator will first check whether output and input0
match and if so generate the SSE version, otherwise the AVX version.

[Benedikt Meurer, 2014/11/28 06:20:58]

Forget about this comment, keep both versions. I just noticed that the AVX
encoding doesn't matter here.

+  V(AVXFloat64Sub)                 \
+  V(AVXFloat64Mul)                 \
+  V(AVXFloat64Div)                 \
   V(X64Movsxbl)                    \
   V(X64Movzxbl)                    \
   V(X64Movb)                       \
   V(X64Movsxwl)                    \
   V(X64Movzxwl)                    \
   V(X64Movw)                       \
   V(X64Movl)                       \
   V(X64Movsxlq)                    \
   V(X64Movq)                       \
   V(X64Movsd)                      \
@@ skipping 36 matching lines @@
   V(M1I)  /* [      %r2*1 + K] */      \
   V(M2I)  /* [      %r2*2 + K] */      \
   V(M4I)  /* [      %r2*4 + K] */      \
   V(M8I)  /* [      %r2*8 + K] */
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_X64_INSTRUCTION_CODES_X64_H_