Custom call IC for Math.floor.

src/ia32/macro-assembler-ia32.h

Index: src/ia32/macro-assembler-ia32.h
diff --git a/src/ia32/macro-assembler-ia32.h b/src/ia32/macro-assembler-ia32.h
index a7534cbd47bf2c8ac796a1af2420e7db92d8287d..aa7caf54aa901c971cf3e9e0ad26c4f2147c1390 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -258,6 +258,8 @@ class MacroAssembler: public Assembler {
                       TypeInfo info,
                       Label* on_not_int32);
 
+  void LoadPowerOf2(XMMRegister dst, Register scratch, int power);
+
   // Abort execution if argument is not a number. Used in debug code.
   void AbortIfNotNumber(Register object);