---
layout: stdlib-reference
---
# QuadReadAcrossDiagonal
## Description
## Signature
T QuadReadAcrossDiagonal<T>(T localValue)
where T : __BuiltinType;
vector<T, N> QuadReadAcrossDiagonal<T, int N>(vector<T, N> localValue)
where T : __BuiltinType;
matrix<T, N, M> QuadReadAcrossDiagonal<T, int N, int M>(matrix<T, N, M> localValue)
where T : __BuiltinType;
## Generic Parameters
#### T: \_\_BuiltinType
#### N : int
#### M : int
## Parameters
#### localValue : [T](quadreadacrossdiagonal-048e.html#typeparam-T)
#### localValue : [vector](../types/vector/index.html)\<[T](../types/vector/index.html#typeparam-T), [N](../types/vector/index.html#decl-N)\>
#### localValue : [matrix](../types/matrix/index.html)\<[T](../types/matrix/t-0.html), [N](../types/matrix/index.html#decl-N), [M](../types/matrix/index.html#decl-M)\>
## Availability and Requirements
Defined for the following targets:
#### hlsl
Available in all stages.
#### glsl
Available in all stages.
#### cuda
Available in all stages.
#### metal
Available in all stages.
#### wgsl
Available in all stages.
#### spirv
Available in all stages.
Requires capability: `spvGroupNonUniformQuad`.