pub struct VexInstruction { /* private fields */ }
Expand description

Constructs a VEX-encoded instruction using a builder pattern. This approach makes it visually easier to transform something the manual’s syntax, VEX.128.66.0F 73 /7 ib to code: VexInstruction::new().length(...).prefix(...).map(...).w(true).opcode(0x1F).reg(...).rm(...).

Implementations

Construct a default VEX instruction.

Set the length of the instruction.

Set the legacy prefix byte of the instruction: None | 66 | F2 | F3. VEX instructions pack these into the prefix, not as separate bytes.

Set the opcode map byte of the instruction: None | 0F | 0F38 | 0F3A. VEX instructions pack these into the prefix, not as separate bytes.

Set the W bit, denoted by .W1 or .W0 in the instruction string. Typically used to indicate an instruction using 64 bits of an operand (e.g. 64 bit lanes). EVEX packs this bit in the EVEX prefix; previous encodings used the REX prefix.

Set the instruction opcode byte.

Set the register to use for the reg bits; many instructions use this as the write operand.

Some instructions use the ModRM.reg field as an opcode extension. This is usually denoted by a /n field in the manual.

Set the register to use for the rm bits; many instructions use this as the “read from register/memory” operand. Currently this does not support memory addressing (TODO).Setting this affects both the ModRM byte (rm section) and the VEX prefix (the extension bits for register encodings > 8).

Set the vvvv register; some instructions allow using this as a second, non-destructive source register in 3-operand instructions (e.g. 2 read, 1 write).

Set the imm byte when used for a register. The reg bits are stored in imm8[7:4] with the lower bits unused. Overrides a previously set Self::imm field.

Set the imm byte. Overrides a previously set Self::imm_reg field.

Emit the VEX-encoded instruction to the code sink:

Trait Implementations

Returns the “default value” for a type. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.