| Issue |
184523
|
| Summary |
[Matrix] Implement matrix support for the `WaveActiveAllEqual` HLSL Function
|
| Labels |
HLSL,
bot:HLSL
|
| Assignees |
|
| Reporter |
kmpeng
|
> Note: This issue tracks matrix support for `WaveActiveAllEqual`. The original implementation issue is [here](https://github.com/llvm/llvm-project/issues/99162).
Matrix requirements:
- [ ] https://github.com/llvm/wg-hlsl/issues/387
## HLSL:
Returns true if the _expression_ is the same for every active lane in the current wave (and thus uniform across it).
## Syntax
``` syntax
<bool-type> WaveActiveAllEqual(
<type> expr
);
```
## Parameters
<dl> <dt>
*expr*
</dt> <dd>
The _expression_ to evaluate.
`<type>` can be a basic scalar, vector, or matrix type.
</dd> </dl>
## Return value
Returns `true` for each component of `expr` that is the same for every active lane in the current wave.
`<bool-type>` will be a scalar, vector, or matrix of `bool`, matching the dimensionality of the input `<type>`.
For instance, an input `<type>` of `matrix<float, 4, 3>` will result in a return `<bool-type>` of `matrix<bool, 4, 3>`.
## Remarks
This function is supported from shader model 6.0 in all shader stages.
## See also
<dl> <dt>
[Overview of Shader Model 6](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src//direct3dhlsl/hlsl-shader-model-6-0-features-for-direct3d-12.md)
</dt> <dt>
[Shader Model 6](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src//direct3dhlsl/shader-model-6-0.md)
</dt> </dl>
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