ARM: Fast path for integer inputs to EmitVFPTruncate

src/arm/code-stubs-arm.h

 // Copyright 2012 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 755 matching lines @@
 
   // Load the number from object into double_dst in the double format.
   // Control will jump to not_int32 if the value cannot be exactly represented
   // by a 32-bit integer.
   // Floating point value in the 32-bit integer range that are not exact integer
   // won't be loaded.
   static void LoadNumberAsInt32Double(MacroAssembler* masm,
                                       Register object,
                                       Destination destination,
                                       DwVfpRegister double_dst,
+                                      DwVfpRegister double_scratch,
                                       Register dst1,
                                       Register dst2,
                                       Register heap_number_map,
                                       Register scratch1,
                                       Register scratch2,
                                       SwVfpRegister single_scratch,
                                       Label* not_int32);
 
   // Loads the number from object into dst as a 32-bit integer.
   // Control will jump to not_int32 if the object cannot be exactly represented
   // by a 32-bit integer.
   // Floating point value in the 32-bit integer range that are not exact integer
   // won't be converted.
   // scratch3 is not used when VFP3 is supported.
   static void LoadNumberAsInt32(MacroAssembler* masm,
                                 Register object,
                                 Register dst,
                                 Register heap_number_map,
                                 Register scratch1,
                                 Register scratch2,
                                 Register scratch3,
-                                DwVfpRegister double_scratch,
+                                DwVfpRegister double_scratch0,
+                                DwVfpRegister double_scratch1,
                                 Label* not_int32);
 
   // Generate non VFP3 code to check if a double can be exactly represented by a
   // 32-bit integer. This does not check for 0 or -0, which need
   // to be checked for separately.
   // Control jumps to not_int32 if the value is not a 32-bit integer, and falls
   // through otherwise.
   // src1 and src2 will be cloberred.
   //
   // Expected input:
@@ skipping 86 matching lines @@
 
   class LookupModeBits: public BitField<LookupMode, 0, 1> {};
 
   LookupMode mode_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_CODE_STUBS_ARM_H_