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tgsi: Document ATI_fragment_shader instruction set operations.

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Michal Krol 2009-03-09 08:37:34 +01:00
parent 40ca02a045
commit 0d727fa0f0
1 changed files with 54 additions and 0 deletions
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54
src/gallium/auxiliary/tgsi/tgsi-instruction-set.txt
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@ -143,3 +143,57 @@ TGSI Instruction Specification
dst.z = src0.z * src1.z + src2.z
dst.w = src0.w * src1.w + src2.w
1.2 GL_ATI_fragment_shader
---------------------------
1.2.1 SUB - Subtract
dst.x = src0.x - src1.x
dst.y = src0.y - src1.y
dst.z = src0.z - src1.z
dst.w = src0.w - src1.w
1.2.2 DOT3 - 3-component Dot Product
Alias for DP3.
1.2.3 DOT4 - 4-component Dot Product
Alias for DP4.
1.2.4 LERP - Linear Interpolate
dst.x = src0.x * (src1.x - src2.x) + src2.x
dst.y = src0.y * (src1.y - src2.y) + src2.y
dst.z = src0.z * (src1.z - src2.z) + src2.z
dst.w = src0.w * (src1.w - src2.w) + src2.w
1.2.5 CND - Condition
dst.x = (src2.x > 0.5) ? src0.x : src1.x
dst.y = (src2.y > 0.5) ? src0.y : src1.y
dst.z = (src2.z > 0.5) ? src0.z : src1.z
dst.w = (src2.w > 0.5) ? src0.w : src1.w
1.2.6 CND0 - Condition Zero
dst.x = (src2.x >= 0.0) ? src0.x : src1.x
dst.y = (src2.y >= 0.0) ? src0.y : src1.y
dst.z = (src2.z >= 0.0) ? src0.z : src1.z
dst.w = (src2.w >= 0.0) ? src0.w : src1.w
1.2.7 DOT2ADD - 2-component Dot Product And Add
dst.x = src0.x * src1.x + src0.y * src1.y + src2.x
dst.y = src0.x * src1.x + src0.y * src1.y + src2.x
dst.z = src0.x * src1.x + src0.y * src1.y + src2.x
dst.w = src0.x * src1.x + src0.y * src1.y + src2.x