lt (sm4 - asm)
Component-wise vector floating point less-than comparison.
| lt dest[.mask], [-]src0[_abs][.swizzle], [-]src1[_abs][.swizzle] |
|---|
| Item | Description |
|---|---|
| dest |
[in] The address of the result of the operation. |
| src0 |
[in] The value to compare to src1. |
| src1 |
[in] The value to compare to src0. |
Remarks
This instruction performs the float comparison (src0 < src1) for each component, and writes the result to dest.
If the comparison is true, then 0xFFFFFFFF is returned for that component. Otherwise 0x0000000 is returned
Denorms are flushed before comparison; original source registers are untouched.
+0 equals -0.
Comparison with NaN returns false.
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 |