[turbofan] Unify Math.floor / Math.ceil optimization.

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 342 matching lines @@
     case greater_equal:
       return less_equal;
     case less_equal:
       return greater_equal;
     default:
       return cc;
   }
 }
 
 
+enum RoundingMode {
+  kRoundToNearest = 0x0,
+  kRoundDown = 0x1,
+  kRoundUp = 0x2,
+  kRoundToZero = 0x3
+};
+
+
 // -----------------------------------------------------------------------------
 // Machine instruction Immediates
 
 class Immediate BASE_EMBEDDED {
  public:
   explicit Immediate(int32_t value) : value_(value) {}
   explicit Immediate(Smi* value) {
     DCHECK(SmiValuesAre31Bits());  // Only available for 31-bit SMI.
     value_ = static_cast<int32_t>(reinterpret_cast<intptr_t>(value));
   }
@@ skipping 764 matching lines @@
   void punpckhdq(XMMRegister dst, XMMRegister src);
 
   // SSE 4.1 instruction
   void extractps(Register dst, XMMRegister src, byte imm8);
 
   void pextrd(Register dst, XMMRegister src, int8_t imm8);
 
   void pinsrd(XMMRegister dst, Register src, int8_t imm8);
   void pinsrd(XMMRegister dst, const Operand& src, int8_t imm8);
 
-  enum RoundingMode {
-    kRoundToNearest = 0x0,
-    kRoundDown      = 0x1,
-    kRoundUp        = 0x2,
-    kRoundToZero    = 0x3
-  };
-
   void roundsd(XMMRegister dst, XMMRegister src, RoundingMode mode);
 
   // AVX instruction
   void vfmadd132sd(XMMRegister dst, XMMRegister src1, XMMRegister src2) {
     vfmasd(0x99, dst, src1, src2);
   }
   void vfmadd213sd(XMMRegister dst, XMMRegister src1, XMMRegister src2) {
     vfmasd(0xa9, dst, src1, src2);
   }
   void vfmadd231sd(XMMRegister dst, XMMRegister src1, XMMRegister src2) {
@@ skipping 699 matching lines @@
  private:
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_ASSEMBLER_X64_H_