dlt (sm5 - asm)
Component-wise double-precision less-than comparison.
| dlt[_sat] dest[.mask], [-]src0[_abs][.swizzle], [-]src1[_abs][.swizzle] |
|---|
| Item | Description |
|---|---|
| dest |
[in] The address of the results of the operation. |
| src0 |
[in] The components to compare to src1. |
| src1 |
[in] The components to compare to src0. |
Remarks
This instruction performs the double-precision floating-point comparison (src0 < src1) for each component and writes the result to dest.
If the comparison is true, then 32-bit 0xFFFFFFFF is returned for that component. Otherwise 32-bit 0x00000000 is returned.
Comparison with NaN returns false.
The valid dest masks are any one or two components. That is: .x, .y, .z, .w, .xy, .xz, .xw, .yz, .yw, .zw The first dest component in the mask receives the 32-bit result for the first double comparison. The second component in the mask (if present) receives the 32-bit result for the second double comparison.
The valid swizzles for the source parameters are .xyzw, .xyxy, .zwxy, .zwzw. The following src mappings are post-swizzle:
- src0 is a double vec2 across (x 32LSB, y 32MSB) and (z 32LSB, w 32MSB).
- src1 is a double vec2 across (x 32LSB, y 32MSB) and (z 32LSB, w 32MSB).
This instruction applies to the following shader stages:
| Vertex | Hull | Domain | Geometry | Pixel | Compute |
|---|---|---|---|---|---|
| X | X | X | X | X | X |
Minimum Shader Model
This instruction is supported in the following shader models:
| Shader Model | Supported |
|---|---|
| Shader Model 5 | yes |
| Shader Model 4.1 | no |
| Shader Model 4 | no |
| Shader Model 3 (DirectX HLSL) | no |
| Shader Model 2 (DirectX HLSL) | no |
| Shader Model 1 (DirectX HLSL) | no |