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docs: Pow, sqrt.

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Corbin Simpson 2009-12-21 19:41:09 -08:00
parent d92a685bc3
commit dd801e5c02
1 changed files with 26 additions and 22 deletions
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48
src/gallium/docs/source/tgsi.rst
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@ -44,7 +44,7 @@ LIT - Light Coefficients
dst.y = max(src.x, 0.0)
dst.z = (src.x > 0.0) ? pow(max(src.y, 0.0), clamp(src.w, -128.0, 128.0)) : 0.0
dst.z = (src.x > 0.0) ? max(src.y, 0.0)^{clamp(src.w, -128.0, 128.0))} : 0.0
dst.w = 1.0
@ -66,24 +66,24 @@ RSQ - Reciprocal Square Root
.. math::
dst.x = 1.0 / sqrt(abs(src.x))
dst.x = 1.0 / \sqrt{abs(src.x)}
dst.y = 1.0 / sqrt(abs(src.x))
dst.y = 1.0 / \sqrt{abs(src.x)}
dst.z = 1.0 / sqrt(abs(src.x))
dst.z = 1.0 / \sqrt{abs(src.x)}
dst.w = 1.0 / sqrt(abs(src.x))
dst.w = 1.0 / \sqrt{abs(src.x)}
EXP - Approximate Exponential Base 2
.. math::
dst.x = pow(2.0, \lfloor src.x\rfloor)
dst.x = 2^{\lfloor src.x\rfloor}
dst.y = src.x - \lfloor src.x\rfloor
dst.z = pow(2.0, src.x)
dst.z = 2^{src.x}
dst.w = 1.0
@ -94,7 +94,7 @@ LOG - Approximate Logarithm Base 2
dst.x = \lfloor lg2(abs(src.x)))\rfloor
dst.y = abs(src.x) / pow(2.0, \lfloor lg2(abs(src.x))\rfloor )
dst.y = abs(src.x) / 2^{\lfloor lg2(abs(src.x))\rfloor}
dst.z = lg2(abs(src.x))
@ -331,14 +331,17 @@ This is identical to ARL.
dst.w = round(src.w)
1.3.10 EX2 - Exponential Base 2
EX2 - Exponential Base 2
.. math::
dst.x = pow(2.0, src.x)
dst.y = pow(2.0, src.x)
dst.z = pow(2.0, src.x)
dst.w = pow(2.0, src.x)
dst.x = 2^{src.x}
dst.y = 2^{src.x}
dst.z = 2^{src.x}
dst.w = 2^{src.x}
1.3.11 LG2 - Logarithm Base 2
@ -351,14 +354,17 @@ This is identical to ARL.
dst.w = lg2(src.x)
1.3.12 POW - Power
POW - Power
.. math::
dst.x = pow(src0.x, src1.x)
dst.y = pow(src0.x, src1.x)
dst.z = pow(src0.x, src1.x)
dst.w = pow(src0.x, src1.x)
dst.x = src0.x^{src1.x}
dst.y = src0.x^{src1.x}
dst.z = src0.x^{src1.x}
dst.w = src0.x^{src1.x}
1.3.15 XPD - Cross Product
@ -1016,7 +1022,7 @@ Support for these opcodes indicated by a special pipe capability bit (TBD).
clamp(x,y,z) Clamp x between y and z.
(x < y) ? y : (x > z) ? z : x
:math:`\lfloor x\rfloor` Floor of x.
:math:`\lfloor x\rfloor` Floor of `x`.
lg2(x) Logarithm base 2 of x.
@ -1032,14 +1038,12 @@ Support for these opcodes indicated by a special pipe capability bit (TBD).
pop() Pop from stack.
pow(x,y) Raise x to power of y.
:math:`x^y` `x` to the power `y`.
push(x) Push x on stack.
round(x) Round x.
sqrt(x) Square root of x.
trunc(x) Truncate x.