SSE2 truncating double-to-i.

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 901 matching lines @@
   // 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 por(XMMRegister dst, XMMRegister src);
   void ptest(XMMRegister dst, XMMRegister src);
 
   void psllq(XMMRegister reg, int8_t shift);
+  void psllq(XMMRegister dst, XMMRegister src);
+  void psrlq(XMMRegister reg, int8_t shift);
+  void psrlq(XMMRegister dst, XMMRegister src);
+  void punpckldq(XMMRegister dst, XMMRegister src);

[Erik Corry, 2011/01/04 22:33:00]

Seems like not all these ended up being needed.  We normally don't add them
unless we use them somewhere.

   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);
@@ skipping 141 matching lines @@
  private:
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_ASSEMBLER_IA32_H_