AMDGPU Instructions Notation¶
This is an overview of notation used to describe the syntax of AMDGPU assembler instructions.
This notation looks a lot like the syntax of assembler instructions, except that instead of real operands and modifiers, it uses references to their descriptions.
This is the notation used to describe AMDGPU instructions:
An instruction may have zero or more operands. They are comma-separated in the description:
The order of operands is fixed. Operands cannot be omitted except for special cases described below.
An operand is described using the following notation:
kind is an optional prefix describing operand kind.
name is a link to a description of the operand.
tags are optional. They are used to indicate special operand properties.
Operand kind indicates which values are accepted by the operand.
Operands which only accept vector registers are labelled with ‘v’ prefix.
Operands which only accept scalar registers and values are labelled with ‘s’ prefix.
Operands which accept any registers and values have no prefix.
vdata // operand only accepts vector registers sdst // operand only accepts scalar registers src1 // operand accepts vector registers, scalar registers, and scalar values
An instruction may have zero or more optional modifiers. They are space-separated in the description:
The order of modifiers is fixed.
A modifier is described using the following notation:
Where the name is a link to a description of the modifier.