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Floating-point round to integral float.
| round_pi[_sat] dest[.mask], [-]src0[_abs][.swizzle] |
|---|
| Item | Description |
|---|---|
| dest |
[in] The address of the results of the operation. |
| src0 |
[in] The components in the operation. |
Remarks
This instruction performs a component-wise floating-point round of the values in src0, writing integral floating-point values to dest.
round_pi rounds towards +infinity, commonly known as ceil().
The following table shows the results obtained when executing the instruction with various classes of numbers.
F means finite-real number.
| src | -inf | -F | -denorm | -0 | +0 | +denorm | +F | +inf | NaN |
|---|---|---|---|---|---|---|---|---|---|
| dest | -inf | -F | -0 | -0 | +0 | +0 | +F | +inf | NaN |
This instruction applies to the following shader stages:
| Vertex Shader | Geometry Shader | Pixel Shader |
|---|---|---|
| x | x | x |
Minimum Shader Model
This function is supported in the following shader models.
| Shader Model | Supported |
|---|---|
| Shader Model 5 | yes |
| Shader Model 4.1 | yes |
| Shader Model 4 | yes |
| Shader Model 3 (DirectX HLSL) | no |
| Shader Model 2 (DirectX HLSL) | no |
| Shader Model 1 (DirectX HLSL) | no |