round_z (sm4 - asm)
Floating-point round to integral float.
| round_z[_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_z rounds towards zero.
The following table shows the results obtained when executing the instruction with various classes of numbers.
| src | -inf | -F | -denorm | -0 | +0 | +denorm | +F | +inf | NaN |
| dest | -inf | -F | -0 | -0 | +0 | +0 | +F | +inf | NaN |
F means finite-real number.
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 |
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Build date: 3/5/2013
