decb              919 src/x64/assembler-x64.h   void decb(Register dst);
decb              920 src/x64/assembler-x64.h   void decb(const Operand& dst);
decb              136 src/x64/builtins-x64.cc         __ decb(FieldOperand(rcx,
decb             2827 src/x64/macro-assembler-x64.cc   decb(reg);  // 0 if negative, 255 if positive.
decb             3508 src/x64/stub-cache-x64.cc         __ decb(rdx);  // 0 if negative, 255 if positive.
decb              156 test/cctest/test-disasm-x64.cc   __ decb(rdx);
decb              157 test/cctest/test-disasm-x64.cc   __ decb(Operand(rax, 10));
decb              158 test/cctest/test-disasm-x64.cc   __ decb(Operand(rbx, rcx, times_4, 10000));