diff options
| -rw-r--r-- | src/gallium/docs/source/tgsi.rst | 83 |
1 files changed, 47 insertions, 36 deletions
diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst index c62ad6541b..f49725295c 100644 --- a/src/gallium/docs/source/tgsi.rst +++ b/src/gallium/docs/source/tgsi.rst @@ -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 |