testb            1994 src/x64/assembler-x64.cc void Assembler::testb(Register dst, Register src) {
testb            2011 src/x64/assembler-x64.cc void Assembler::testb(Register reg, Immediate mask) {
testb            2029 src/x64/assembler-x64.cc void Assembler::testb(const Operand& op, Immediate mask) {
testb            2039 src/x64/assembler-x64.cc void Assembler::testb(const Operand& op, Register reg) {