| Issue |
184489
|
| Summary |
[Matrix] Implement matrix support for the `smoothstep` HLSL Function
|
| Labels |
HLSL,
bot:HLSL
|
| Assignees |
|
| Reporter |
kmpeng
|
> Note: This issue tracks matrix support for `smoothstep`. The original implementation issue is [here](https://github.com/llvm/llvm-project/issues/99156).
Matrix requirements:
- [ ] https://github.com/llvm/wg-hlsl/issues/387
## HLSL:
Returns a smooth Hermite interpolation between 0 and 1, if *x* is in the range \[*min*, *max*\].
| *ret* smoothstep(*min*, *max*, *x*) |
|-------------------------------------|
## Parameters
| Item | Description |
|--------------------------------------------------------------|-----------------------------------------------------------|
| <span id="min"></span><span id="MIN"></span>*min*<br/> | \[in\] The minimum range of the *x* parameter.<br/> |
| <span id="max"></span><span id="MAX"></span>*max*<br/> | \[in\] The maximum range of the *x* parameter.<br/> |
| <span id="x"></span><span id="X"></span>*x*<br/> | \[in\] The specified value to be interpolated.<br/> |
## Return Value
Returns 0 if *x* is less than *min*; 1 if *x* is greater than *max*; otherwise, a value between 0 and 1 if *x* is in the range \[*min*, *max*\].
## Remarks
Use the **smoothstep** HLSL intrinsic function to create a smooth transition between two values. For example, you can use this function to blend two colors smoothly.
## Type Description
| Name | [**Template Type**](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src//direct3dhlsl/dx-graphics-hlsl-intrinsic-functions.md) | [**Component Type**](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src//direct3dhlsl/dx-graphics-hlsl-intrinsic-functions.md) | Size |
|-------|----------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------|--------------------------------|
| *x* | [**scalar**](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src//direct3dhlsl/dx-graphics-hlsl-intrinsic-functions.md), **vector**, or **matrix** | [**float**](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src/WinProg/windows-data-types.md) | any |
| *min* | same as input *x* | [**float**](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src/WinProg/windows-data-types.md) | same dimension(s) as input *x* |
| *max* | same as input *x* | [**float**](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src/WinProg/windows-data-types.md) | same dimension(s) as input *x* |
| *ret* | same as input *x* | [**float**](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src/WinProg/windows-data-types.md) | same dimension(s) as input *x* |
## Minimum Shader Model
This function is supported in the following shader models.
| Shader Model | Supported |
|------------------------------------------------------------------------------------|---------------------|
| [Shader Model 2 (DirectX HLSL)](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src//direct3dhlsl/dx-graphics-hlsl-sm2.md) and higher shader models | yes |
| [Shader Model 1 (DirectX HLSL)](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src//direct3dhlsl/dx-graphics-hlsl-sm1.md) | yes (vs\_1\_1 only) |
## See also
<dl> <dt>
[**Intrinsic Functions (DirectX HLSL)**](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src//direct3dhlsl/dx-graphics-hlsl-intrinsic-functions.md)
</dt> </dl>
![]()
_______________________________________________
llvm-bugs mailing list
[email protected]
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
