Allow optimizing compiler to compute Math.log using untagged doubles.

src/ia32/assembler-ia32.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 887 matching lines @@
   void movdqa(XMMRegister dst, const Operand& src);
   void movdqa(const Operand& dst, XMMRegister src);
   void movdqu(XMMRegister dst, const Operand& src);
   void movdqu(const Operand& dst, XMMRegister src);
 
   // Use either movsd or movlpd.
   void movdbl(XMMRegister dst, const Operand& src);
   void movdbl(const Operand& dst, XMMRegister src);
 
   void movd(XMMRegister dst, const Operand& src);
+  void movd(const Operand& src, XMMRegister dst);
   void movsd(XMMRegister dst, XMMRegister src);
 
   void pand(XMMRegister dst, XMMRegister src);
   void pxor(XMMRegister dst, XMMRegister src);
   void ptest(XMMRegister dst, XMMRegister src);
 
-  void psllq(XMMRegister reg, int8_t imm8);
+  void psllq(XMMRegister reg, int8_t shift);
+  void pshufd(XMMRegister dst, XMMRegister src, int8_t shuffle);
+  void pextrd(const Operand& dst, XMMRegister src, int8_t offset);
 
   // Parallel XMM operations.
   void movntdqa(XMMRegister src, const Operand& dst);
   void movntdq(const Operand& dst, XMMRegister src);
   // Prefetch src position into cache level.
   // Level 1, 2 or 3 specifies CPU cache level. Level 0 specifies a
   // non-temporal
   void prefetch(const Operand& src, int level);
   // TODO(lrn): Need SFENCE for movnt?
 
@@ skipping 139 matching lines @@
  private:
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_ASSEMBLER_IA32_H_