1523 void X86_64Assembler::rex(bool force, bool w, Register* r, Register* x, Register* b) {
1529   uint8_t rex = force ? 0x40 : 0;
1531     rex |= 0x48;  // REX.W000
1534     rex |= 0x44;  // REX.0R00
1538     rex |= 0x42;  // REX.00X0
1542     rex |= 0x41;  // REX.000B
1545   if (rex != 0) {
1546     EmitUint8(rex);
1556   uint8_t rex = mem->rex();
1558     rex |= 0x40;  // REX.0000
1561     rex |= 0x48;  // REX.W000
1564     rex |= 0x44;  // REX.0R00
1567   if (rex != 0) {
1568     EmitUint8(rex);
2504   uint8_t rex = force ? 0x40 : 0;  in EmitOptionalRex()  local
2506     rex |= 0x48;  // REX.W000  in EmitOptionalRex()
2509     rex |= 0x44;  // REX.0R00  in EmitOptionalRex()
2512     rex |= 0x42;  // REX.00X0  in EmitOptionalRex()
2515     rex |= 0x41;  // REX.000B  in EmitOptionalRex()
2517   if (rex != 0) {  in EmitOptionalRex()
2518     EmitUint8(rex);  in EmitOptionalRex()
2543   uint8_t rex = operand.rex();  in EmitOptionalRex32()  local
2544   if (rex != 0) {  in EmitOptionalRex32()
2545     EmitUint8(rex);  in EmitOptionalRex32()
2550   uint8_t rex = operand.rex();  in EmitOptionalRex32()  local
2552     rex |= 0x44;  // REX.0R00  in EmitOptionalRex32()
2554   if (rex != 0) {  in EmitOptionalRex32()
2555     EmitUint8(rex);  in EmitOptionalRex32()
2560   uint8_t rex = operand.rex();  in EmitOptionalRex32()  local
2562     rex |= 0x44;  // REX.0R00  in EmitOptionalRex32()
2564   if (rex != 0) {  in EmitOptionalRex32()
2565     EmitUint8(rex);  in EmitOptionalRex32()
2578   uint8_t rex = operand.rex();  in EmitRex64()  local
2579   rex |= 0x48;  // REX.W000  in EmitRex64()
2580   EmitUint8(rex);  in EmitRex64()
2596   uint8_t rex = 0x48 | operand.rex();  // REX.W000  in EmitRex64()  local
2598     rex |= 0x44;  // REX.0R00  in EmitRex64()
2600   EmitUint8(rex);  in EmitRex64()
2604   uint8_t rex = 0x48 | operand.rex();  // REX.W000  in EmitRex64()  local
2606     rex |= 0x44;  // REX.0R00  in EmitRex64()
2608   EmitUint8(rex);  in EmitRex64()
2618   uint8_t rex = operand.rex();  in EmitOptionalByteRegNormalizingRex32()  local
2622     rex |= 0x40;  // REX.0000  in EmitOptionalByteRegNormalizingRex32()
2625     rex |= 0x44;  // REX.0R00  in EmitOptionalByteRegNormalizingRex32()
2627   if (rex != 0) {  in EmitOptionalByteRegNormalizingRex32()
2628     EmitUint8(rex);  in EmitOptionalByteRegNormalizingRex32()