22     rax = 0,
42     Times1 = 0,
72     int32_t disp_ = 0;
73     uint8_t rex_ = 0;
74     uint8_t sib_ = 0;
75     uint8_t moderm_ = 0;
89     void Pushq(Register x);
90     void Pushq(Immediate x);
91     void Push(Register x);
92     void Popq(Register x);
93     void Pop(Register x);
158     void EmitRexPrefix(const Register &x)  in EmitRexPrefix()  argument
160         if (HighBit(x) != 0) {  in EmitRexPrefix()
177         // 0: Extension to the MODRM.rm field B  in EmitRexPrefix()
183         // 0: Extension to the MODRM.rm field B  in EmitRexPrefix()
190         // 0: Extension to the MODRM.rm field B  in EmitRexPrefixl()
191         if (HighBit(reg) != 0 || HighBit(rm) != 0) {  in EmitRexPrefixl()
199         // 0: Extension to the MODRM.rm field B  in EmitRexPrefix()
206         // 0: Extension to the MODRM.rm field B  in EmitRexPrefixl()
207         if (HighBit(reg) != 0 || rm.rex_ != 0) {  in EmitRexPrefixl()
246     // | 0   1   0   0 | W | R | X | B |
248     static constexpr uint8_t REX_PREFIX_FIXED_BITS = 0x40;
249     static constexpr uint8_t REX_PREFIX_B = 0x41;
250     static constexpr uint8_t REX_PREFIX_W = 0x48;
252     static constexpr uint8_t MODE_RM = 0xC0;
282     static uint32_t LowBits(Register x)  in LowBits()  argument
284         return static_cast<uint8_t>(x) & LOW_BITS_MASK;  in LowBits()
286     static uint32_t HighBit(Register x)  in HighBit()  argument
288         return static_cast<uint8_t>(x) >> LOW_BITS_SIZE;  in HighBit()