Edit

dp2add - ps

  • Article

Performs a 2D dot product and a scalar addition.

Syntax

dp2add dst, src0, src1, src2.{x|y|z|w}

Where:

  • dst is a destination register.
  • src0, src1, and src2 are three source registers.
  • {x|y|z|w} is the required replicate swizzle on src2.

Remarks

Pixel shader versions 1_1 1_2 1_3 1_4 2_0 2_x 2_sw 3_0 3_sw
dp2add x x x x x

 

The scalar value for add is chosen by the replicate swizzle on src2.

The following code snippet shows the operations performed.

dest = src0.r * src1.r + src0.g * src1.g + src2.replicate_swizzle
// The scalar result is replicated to the write mask components

Pixel Shader Instructions