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pow - vs

  • Článek

Full precision abs(src0)src1.

Syntax

pow dst, src0, src1

 

where

  • dst is the destination register.
  • src0 is an input source register. Source register requires explicit use of replicate swizzle, that is, exactly one of the .x, .y, .z, .w swizzle components (or the .r, .g, .b, .a equivalents) must be specified.
  • src1 is an input source register. Source register requires explicit use of replicate swizzle, that is, exactly one of the .x, .y, .z, .w swizzle components (or the .r, .g, .b, .a equivalents) must be specified.

Remarks

Vertex shader versions 1_1 2_0 2_x 2_sw 3_0 3_sw
pow x x x x x

 

This instruction works as shown here.

dest = pow(abs(src0), src1);

This is a scalar instruction, therefore the source registers should have replicate swizzles to indicate which channels are used.

The scalar result is replicated to all four output channels.

This instruction could be expanded as exp(src1 * log(src0)).

Precision is not lower than 15 bits.

The dest register should be a temporary register, and should not be the same register as src1.

Vertex Shader Instructions