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docs: abs, lg2, ceil.

This commit is contained in:
Corbin Simpson 2009-12-21 19:57:56 -08:00
parent dd801e5c02
commit 14743ac0e3
1 changed files with 47 additions and 36 deletions
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src/gallium/docs/source/tgsi.rst
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@ -53,26 +53,26 @@ RCP - Reciprocal
.. math::
dst.x = 1.0 / src.x
dst.x = \frac{1}{src.x}
dst.y = 1.0 / src.x
dst.y = \frac{1}{src.x}
dst.z = 1.0 / src.x
dst.z = \frac{1}{src.x}
dst.w = 1.0 / src.x
dst.w = \frac{1}{src.x}
RSQ - Reciprocal Square Root
.. math::
dst.x = 1.0 / \sqrt{abs(src.x)}
dst.x = \frac{1}{\sqrt{|src.x|}}
dst.y = 1.0 / \sqrt{abs(src.x)}
dst.y = \frac{1}{\sqrt{|src.x|}}
dst.z = 1.0 / \sqrt{abs(src.x)}
dst.z = \frac{1}{\sqrt{|src.x|}}
dst.w = 1.0 / \sqrt{abs(src.x)}
dst.w = \frac{1}{\sqrt{|src.x|}}
EXP - Approximate Exponential Base 2
@ -92,13 +92,13 @@ LOG - Approximate Logarithm Base 2
.. math::
dst.x = \lfloor lg2(abs(src.x)))\rfloor
dst.x = \lfloor\log_2{|src.x|}\rfloor
dst.y = abs(src.x) / 2^{\lfloor lg2(abs(src.x))\rfloor}
dst.y = \frac{|src.x|}{2^{\lfloor\log_2{|src.x|}\rfloor}}
dst.z = lg2(abs(src.x))
dst.z = \log_2{|src.x|}
dst.w = 1.0
dst.w = 1
MUL - Multiply
@ -344,14 +344,17 @@ EX2 - Exponential Base 2
dst.w = 2^{src.x}
1.3.11 LG2 - Logarithm Base 2
LG2 - Logarithm Base 2
.. math::
dst.x = lg2(src.x)
dst.y = lg2(src.x)
dst.z = lg2(src.x)
dst.w = lg2(src.x)
dst.x = \log_2{src.x}
dst.y = \log_2{src.x}
dst.z = \log_2{src.x}
dst.w = \log_2{src.x}
POW - Power
@ -376,14 +379,17 @@ POW - Power
dst.w = 1.0
1.4.1 ABS - Absolute
ABS - Absolute
.. math::
dst.x = abs(src.x)
dst.y = abs(src.y)
dst.z = abs(src.z)
dst.w = abs(src.w)
dst.x = |src.x|
dst.y = |src.y|
dst.z = |src.z|
dst.w = |src.w|
1.4.2 RCC - Reciprocal Clamped
@ -807,14 +813,17 @@ SCS - Sine Cosine
Support for these opcodes indicated by a special pipe capability bit (TBD).
1.11.1 CEIL - Ceiling
CEIL - Ceiling
.. math::
dst.x = ceil(src.x)
dst.y = ceil(src.y)
dst.z = ceil(src.z)
dst.w = ceil(src.w)
dst.x = \lceil src.x\rceil
dst.y = \lceil src.y\rceil
dst.z = \lceil src.z\rceil
dst.w = \lceil src.w\rceil
1.11.2 I2F - Integer To Float
@ -907,14 +916,17 @@ Support for these opcodes indicated by a special pipe capability bit (TBD).
dst.w = src0.w ^ src1.w
1.11.11 SAD - Sum Of Absolute Differences
SAD - Sum Of Absolute Differences
.. math::
dst.x = abs(src0.x - src1.x) + src2.x
dst.y = abs(src0.y - src1.y) + src2.y
dst.z = abs(src0.z - src1.z) + src2.z
dst.w = abs(src0.w - src1.w) + src2.w
dst.x = |src0.x - src1.x| + src2.x
dst.y = |src0.y - src1.y| + src2.y
dst.z = |src0.z - src1.z| + src2.z
dst.w = |src0.w - src1.w| + src2.w
1.11.12 TXF - Texel Fetch
@ -1014,17 +1026,16 @@ Support for these opcodes indicated by a special pipe capability bit (TBD).
--------------
abs(x) Absolute value of x.
(x < 0.0) ? -x : x
:math:`|x|` Absolute value of `x`.
ceil(x) Ceiling of x.
:math:`\lceil x \rceil` Ceiling of `x`.
clamp(x,y,z) Clamp x between y and z.
(x < y) ? y : (x > z) ? z : x
:math:`\lfloor x\rfloor` Floor of `x`.
lg2(x) Logarithm base 2 of x.
:math:`\log_2{x}` Logarithm of `x`, base 2.
max(x,y) Maximum of x and y.
(x > y) ? x : y