Detailed info about the REX2 prefix. More...

#include <DecoderTypes.h>

Data Fields
ZyanU8	M0
	Legacy map 0 (0x0F) selector bit. More...

ZyanU8	R4
	Extension of the `ModRM.reg` field (bit 4). More...

ZyanU8	X4
	Extension of the `SIB.index` field (bit 4). More...

ZyanU8	B4
	Extension of the `ModRM.rm`, `SIB.base`, or `opcode.reg` field (bit 4). More...

ZyanU8	W
	64-bit operand-size promotion, opcode-extension or PPX hint. More...

ZyanU8	R3
	Extension of the `ModRM.reg` field (bit 3). More...

ZyanU8	X3
	Extension of the `SIB.index` field (bit 3). More...

ZyanU8	B3
	Extension of the `ModRM.rm`, `SIB.base`, or `opcode.reg` field (bit 3). More...

ZyanU8	offset
	The offset of the effective `REX2` byte, relative to the beginning of the instruction, in bytes. More...

Detailed Description

Detailed info about the REX2 prefix.

Field Documentation

◆ B3

ZyanU8 B3

Extension of the ModRM.rm, SIB.base, or opcode.reg field (bit 3).

◆ B4

ZyanU8 B4

Extension of the ModRM.rm, SIB.base, or opcode.reg field (bit 4).

◆ M0

ZyanU8 M0

Legacy map 0 (0x0F) selector bit.

◆ offset

ZyanU8 offset

The offset of the effective REX2 byte, relative to the beginning of the instruction, in bytes.

Note that the REX2 byte can be the first byte of the instruction, which would lead to an offset of 0. Please refer to the instruction attributes to check for the presence of the REX2 prefix.