| Issue |
184522
|
| Summary |
[Matrix] Implement matrix support for the `trunc` HLSL Function
|
| Labels |
HLSL,
bot:HLSL
|
| Assignees |
|
| Reporter |
kmpeng
|
Matrix requirements:
- [ ] https://github.com/llvm/wg-hlsl/issues/387
## HLSL:
Truncates a floating-point value to the integer component.
## Parameters
| Item | Description |
|--------------------------------------------------------|----------------------------------------|
| <span id="x"></span><span id="X"></span>*x*<br/> | \[in\] The specified input.<br/> |
## Return Value
The input value truncated to an integer component.
## Remarks
This function truncates a floating-point value to the integer component. Given a floating-point value of 1.6, the trunc function would return 1.0, whereas the [**round (DirectX HLSL)**](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src/direct3dhlsl/dx-graphics-hlsl-round.md) function would return 2.0.
## 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 |
| ret | Same type 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 1 (DirectX HLSL)](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src/direct3dhlsl/dx-graphics-hlsl-sm1.md) and higher shader models | yes |
## Requirements
| Requirement | Value |
|-------------------|--------------------------------------------------------------------------------------------|
| Header<br/> | <dl> <dt>Corecrt\_math.h</dt> </dl> |
## 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
