dp4 - vs
Computes the four-component dot product of the source registers.
Syntax
| dp4 dst, src0, src1 |
|---|
where
- dst is the destination register.
- src0 is a source register.
- src1 is a source register.
Remarks
| Vertex shader versions | 1_1 | 2_0 | 2_x | 2_sw | 3_0 | 3_sw |
|---|---|---|---|---|---|---|
| dp4 | x | x | x | x | x | x |
The following code fragment shows the operations performed:
dest.w = (src0.x * src1.x) + (src0.y * src1.y) +
(src0.z * src1.z) + (src0.w * src1.w);
dest.x = dest.y = dest.z = dest.w;
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