Version 2.3.6

src/x64/macro-assembler-x64.cc

 // Copyright 2009 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 864 matching lines @@
     return CheckPositiveSmi(first);
   }
   movq(kScratchRegister, first);
   or_(kScratchRegister, second);
   rol(kScratchRegister, Immediate(1));
   testl(kScratchRegister, Immediate(0x03));
   return zero;
 }
 
 
-Condition MacroAssembler::CheckEitherSmi(Register first, Register second) {
+Condition MacroAssembler::CheckEitherSmi(Register first,
+                                         Register second,
+                                         Register scratch) {
   if (first.is(second)) {
     return CheckSmi(first);
   }
-  movl(kScratchRegister, first);
-  andl(kScratchRegister, second);
-  testb(kScratchRegister, Immediate(kSmiTagMask));
+  if (scratch.is(second)) {
+    andl(scratch, first);
+  } else {
+    if (!scratch.is(first)) {
+      movl(scratch, first);
+    }
+    andl(scratch, second);
+  }
+  testb(scratch, Immediate(kSmiTagMask));
   return zero;
 }
 
 
 Condition MacroAssembler::CheckIsMinSmi(Register src) {
   ASSERT(!src.is(kScratchRegister));
   // If we overflow by subtracting one, it's the minimal smi value.
   cmpq(src, kSmiConstantRegister);
   return overflow;
 }
@@ skipping 2038 matching lines @@
   CPU::FlushICache(address_, size_);
 
   // Check that the code was patched as expected.
   ASSERT(masm_.pc_ == address_ + size_);
   ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64