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tgsi: Note that LOG and EXP are approximations.

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This commit is contained in:
Michal Krol 2009-03-10 10:06:19 +01:00
parent 5d0f69e33d
commit bbf84cca57
1 changed files with 2 additions and 2 deletions
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4
src/gallium/auxiliary/tgsi/tgsi-instruction-set.txt
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@ -48,7 +48,7 @@ TGSI Instruction Specification
dst.w = 1.0 / sqrt(abs(src.x))
1.1.6 EXP - Exponential Base 2
1.1.6 EXP - Approximate Exponential Base 2
dst.x = pow(2.0, floor(src.x))
dst.y = src.x - floor(src.x)
@ -56,7 +56,7 @@ TGSI Instruction Specification
dst.w = 1.0
1.1.7 LOG - Logarithm Base 2
1.1.7 LOG - Approximate Logarithm Base 2
dst.x = floor(lg2(abs(src.x)))
dst.y = abs(src.x) / pow(2.0, floor(lg2(abs(src.x))))