lrp - ps
Interpolates linearly between the second and third source registers by a proportion specified in the first source register.
Syntax
| lrp dst, src0, src1, src2 |
|---|
where
- dst is the destination register.
- src0 is a source register.
- src1 is a source register.
- src2 is a source register.
Remarks
| Pixel shader versions | 1_1 | 1_2 | 1_3 | 1_4 | 2_0 | 2_x | 2_sw | 3_0 | 3_sw |
|---|---|---|---|---|---|---|---|---|---|
| lrp | x | x | x | x | x | x | x | x | x |
This instruction performs the linear interpolation based on the following formula.
dest = src0 * src1 + (1-src0) * src2
// which is the same as
dest = src2 + src0 * (src1 - src2)
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