SmiXorConstant    655 src/x64/macro-assembler-x64.h   void SmiXorConstant(Register dst, Register src1, Smi* constant);
SmiXorConstant   1716 test/cctest/test-macro-assembler-x64.cc   __ SmiXorConstant(r9, rcx, Smi::FromInt(y));
SmiXorConstant   1725 test/cctest/test-macro-assembler-x64.cc   __ SmiXorConstant(rcx, rcx, Smi::FromInt(y));