[x64] introduce vex prefix version of float64 arithmetic binop

src/x64/assembler-x64.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 1267 matching lines @@
   }
   void vfnmsub213ss(XMMRegister dst, XMMRegister src1, const Operand& src2) {
     vfmass(0xaf, dst, src1, src2);
   }
   void vfnmsub231ss(XMMRegister dst, XMMRegister src1, const Operand& src2) {
     vfmass(0xbf, dst, src1, src2);
   }
   void vfmass(byte op, XMMRegister dst, XMMRegister src1, XMMRegister src2);
   void vfmass(byte op, XMMRegister dst, XMMRegister src1, const Operand& src2);
 
+  void vaddsd(XMMRegister dst, XMMRegister src1, XMMRegister src2) {
+    vsd(0x58, dst, src1, src2);
+  }
+  void vaddsd(XMMRegister dst, XMMRegister src1, const Operand& src2) {
+    vsd(0x58, dst, src1, src2);
+  }
+  void vsubsd(XMMRegister dst, XMMRegister src1, XMMRegister src2) {
+    vsd(0x5c, dst, src1, src2);
+  }
+  void vsubsd(XMMRegister dst, XMMRegister src1, const Operand& src2) {
+    vsd(0x5c, dst, src1, src2);
+  }
+  void vmulsd(XMMRegister dst, XMMRegister src1, XMMRegister src2) {
+    vsd(0x59, dst, src1, src2);
+  }
+  void vmulsd(XMMRegister dst, XMMRegister src1, const Operand& src2) {
+    vsd(0x59, dst, src1, src2);
+  }
+  void vdivsd(XMMRegister dst, XMMRegister src1, XMMRegister src2) {
+    vsd(0x5e, dst, src1, src2);
+  }
+  void vdivsd(XMMRegister dst, XMMRegister src1, const Operand& src2) {
+    vsd(0x5e, dst, src1, src2);
+  }
+  void vsd(byte op, XMMRegister dst, XMMRegister src1, XMMRegister src2);
+  void vsd(byte op, XMMRegister dst, XMMRegister src1, const Operand& src2);
+
   // Debugging
   void Print();
 
   // Check the code size generated from label to here.
   int SizeOfCodeGeneratedSince(Label* label) {
     return pc_offset() - label->pos();
   }
 
   // Mark address of the ExitJSFrame code.
   void RecordJSReturn();
@@ skipping 174 matching lines @@
   void emit_rex(P1 p1, P2 p2, int size) {
     if (size == kInt64Size) {
       emit_rex_64(p1, p2);
     } else {
       DCHECK(size == kInt32Size);
       emit_optional_rex_32(p1, p2);
     }
   }
 
   // Emit vex prefix
+  enum SIMDPrefix { kNone = 0x0, k66 = 0x1, kF3 = 0x2, kF2 = 0x3 };
+  enum VectorLength { kL128 = 0x0, kL256 = 0x4, kLIG = kL128 };
+  enum VexW { kW0 = 0x0, kW1 = 0x80, kWIG = kW0 };
+  enum LeadingOpcode { k0F = 0x1, k0F38 = 0x2, k0F3A = 0x2 };
+
   void emit_vex2_byte0() { emit(0xc5); }
-  void emit_vex2_byte1(XMMRegister reg, XMMRegister v, byte lpp);
+  inline void emit_vex2_byte1(XMMRegister reg, XMMRegister v, VectorLength l,
+                              SIMDPrefix pp);
   void emit_vex3_byte0() { emit(0xc4); }
-  void emit_vex3_byte1(XMMRegister reg, XMMRegister rm, byte m);
-  void emit_vex3_byte1(XMMRegister reg, const Operand& rm, byte m);
-  void emit_vex3_byte2(byte w, XMMRegister v, byte lpp);
+  inline void emit_vex3_byte1(XMMRegister reg, XMMRegister rm, LeadingOpcode m);
+  inline void emit_vex3_byte1(XMMRegister reg, const Operand& rm,
+                              LeadingOpcode m);
+  inline void emit_vex3_byte2(VexW w, XMMRegister v, VectorLength l,
+                              SIMDPrefix pp);
+  inline void emit_vex_prefix(XMMRegister reg, XMMRegister v, XMMRegister rm,
+                              VectorLength l, SIMDPrefix pp, LeadingOpcode m,
+                              VexW w);
+  inline void emit_vex_prefix(XMMRegister reg, XMMRegister v, const Operand& rm,
+                              VectorLength l, SIMDPrefix pp, LeadingOpcode m,
+                              VexW w);
 
   // Emit the ModR/M byte, and optionally the SIB byte and
   // 1- or 4-byte offset for a memory operand.  Also encodes
   // the second operand of the operation, a register or operation
   // subcode, into the reg field of the ModR/M byte.
   void emit_operand(Register reg, const Operand& adr) {
     emit_operand(reg.low_bits(), adr);
   }
 
   // Emit the ModR/M byte, and optionally the SIB byte and
@@ skipping 298 matching lines @@
  private:
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_ASSEMBLER_X64_H_