diff options
Diffstat (limited to 'src/gallium/docs/source')
| -rw-r--r-- | src/gallium/docs/source/conf.py | 4 | ||||
| -rw-r--r-- | src/gallium/docs/source/exts/tgsi.py | 17 | ||||
| -rw-r--r-- | src/gallium/docs/source/screen.rst | 4 | ||||
| -rw-r--r-- | src/gallium/docs/source/tgsi.rst | 512 |
4 files changed, 292 insertions, 245 deletions
diff --git a/src/gallium/docs/source/conf.py b/src/gallium/docs/source/conf.py index 9b0c86babdb..59c19ed98dd 100644 --- a/src/gallium/docs/source/conf.py +++ b/src/gallium/docs/source/conf.py @@ -16,13 +16,13 @@ import sys, os # If extensions (or modules to document with autodoc) are in another directory, # add these directories to sys.path here. If the directory is relative to the # documentation root, use os.path.abspath to make it absolute, like shown here. -#sys.path.append(os.path.abspath('.')) +sys.path.append(os.path.abspath('exts')) # -- General configuration ----------------------------------------------------- # Add any Sphinx extension module names here, as strings. They can be extensions # coming with Sphinx (named 'sphinx.ext.*') or your custom ones. -extensions = ['sphinx.ext.pngmath'] +extensions = ['sphinx.ext.pngmath', 'tgsi'] # Add any paths that contain templates here, relative to this directory. templates_path = ['_templates'] diff --git a/src/gallium/docs/source/exts/tgsi.py b/src/gallium/docs/source/exts/tgsi.py new file mode 100644 index 00000000000..e92cd5c4d1b --- /dev/null +++ b/src/gallium/docs/source/exts/tgsi.py @@ -0,0 +1,17 @@ +# tgsi.py +# Sphinx extension providing formatting for TGSI opcodes +# (c) Corbin Simpson 2010 + +import docutils.nodes +import sphinx.addnodes + +def parse_opcode(env, sig, signode): + opcode, desc = sig.split("-", 1) + opcode = opcode.strip().upper() + desc = " (%s)" % desc.strip() + signode += sphinx.addnodes.desc_name(opcode, opcode) + signode += sphinx.addnodes.desc_annotation(desc, desc) + return opcode + +def setup(app): + app.add_description_unit("opcode", "opcode", "%s (TGSI opcode)", parse_opcode) diff --git a/src/gallium/docs/source/screen.rst b/src/gallium/docs/source/screen.rst index 3e57a282fd4..55a4c6990de 100644 --- a/src/gallium/docs/source/screen.rst +++ b/src/gallium/docs/source/screen.rst @@ -227,7 +227,7 @@ buffer_map Map a buffer into memory. -**usage** is a bitmask of :ref:`PIPE_TEXTURE_USAGE` flags. +**usage** is a bitmask of :ref:`PIPE_BUFFER_USAGE` flags. Returns a pointer to the map, or NULL if the mapping failed. @@ -248,7 +248,7 @@ Flush a range of mapped memory into a buffer. The buffer must have been mapped with ``PIPE_BUFFER_USAGE_FLUSH_EXPLICIT``. -**usage** is a bitmask of :ref:`PIPE_TEXTURE_USAGE` flags. +**usage** is a bitmask of :ref:`PIPE_BUFFER_USAGE` flags. buffer_unmap ^^^^^^^^^^^^ diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst index 3e702ceeda4..5478d866678 100644 --- a/src/gallium/docs/source/tgsi.rst +++ b/src/gallium/docs/source/tgsi.rst @@ -6,6 +6,23 @@ for describing shaders. Since Gallium is inherently shaderful, shaders are an important part of the API. TGSI is the only intermediate representation used by all drivers. +Basics +------ + +All TGSI instructions, known as *opcodes*, operate on arbitrary-precision +floating-point four-component vectors. An opcode may have up to one +destination register, known as *dst*, and between zero and three source +registers, called *src0* through *src2*, or simply *src* if there is only +one. + +Some instructions, like :opcode:`I2F`, permit re-interpretation of vector +components as integers. Other instructions permit using registers as +two-component vectors with double precision; see :ref:`Double Opcodes`. + +When an instruction has a scalar result, the result is usually copied into +each of the components of *dst*. When this happens, the result is said to be +*replicated* to *dst*. :opcode:`RCP` is one such instruction. + Instruction Set --------------- @@ -13,7 +30,7 @@ From GL_NV_vertex_program ^^^^^^^^^^^^^^^^^^^^^^^^^ -ARL - Address Register Load +.. opcode:: ARL - Address Register Load .. math:: @@ -26,7 +43,7 @@ ARL - Address Register Load dst.w = \lfloor src.w\rfloor -MOV - Move +.. opcode:: MOV - Move .. math:: @@ -39,7 +56,7 @@ MOV - Move dst.w = src.w -LIT - Light Coefficients +.. opcode:: LIT - Light Coefficients .. math:: @@ -52,33 +69,25 @@ LIT - Light Coefficients dst.w = 1 -RCP - Reciprocal - -.. math:: +.. opcode:: RCP - Reciprocal - dst.x = \frac{1}{src.x} +This instruction replicates its result. - dst.y = \frac{1}{src.x} +.. math:: - dst.z = \frac{1}{src.x} + dst = \frac{1}{src.x} - dst.w = \frac{1}{src.x} +.. opcode:: RSQ - Reciprocal Square Root -RSQ - Reciprocal Square Root +This instruction replicates its result. .. math:: - dst.x = \frac{1}{\sqrt{|src.x|}} - - dst.y = \frac{1}{\sqrt{|src.x|}} - - dst.z = \frac{1}{\sqrt{|src.x|}} + dst = \frac{1}{\sqrt{|src.x|}} - dst.w = \frac{1}{\sqrt{|src.x|}} - -EXP - Approximate Exponential Base 2 +.. opcode:: EXP - Approximate Exponential Base 2 .. math:: @@ -91,7 +100,7 @@ EXP - Approximate Exponential Base 2 dst.w = 1 -LOG - Approximate Logarithm Base 2 +.. opcode:: LOG - Approximate Logarithm Base 2 .. math:: @@ -104,7 +113,7 @@ LOG - Approximate Logarithm Base 2 dst.w = 1 -MUL - Multiply +.. opcode:: MUL - Multiply .. math:: @@ -117,7 +126,7 @@ MUL - Multiply dst.w = src0.w \times src1.w -ADD - Add +.. opcode:: ADD - Add .. math:: @@ -130,33 +139,25 @@ ADD - Add dst.w = src0.w + src1.w -DP3 - 3-component Dot Product - -.. math:: +.. opcode:: DP3 - 3-component Dot Product - dst.x = src0.x \times src1.x + src0.y \times src1.y + src0.z \times src1.z +This instruction replicates its result. - dst.y = src0.x \times src1.x + src0.y \times src1.y + src0.z \times src1.z +.. math:: - dst.z = src0.x \times src1.x + src0.y \times src1.y + src0.z \times src1.z + dst = src0.x \times src1.x + src0.y \times src1.y + src0.z \times src1.z - dst.w = src0.x \times src1.x + src0.y \times src1.y + src0.z \times src1.z +.. opcode:: DP4 - 4-component Dot Product -DP4 - 4-component Dot Product +This instruction replicates its result. .. math:: - dst.x = src0.x \times src1.x + src0.y \times src1.y + src0.z \times src1.z + src0.w \times src1.w - - dst.y = src0.x \times src1.x + src0.y \times src1.y + src0.z \times src1.z + src0.w \times src1.w + dst = src0.x \times src1.x + src0.y \times src1.y + src0.z \times src1.z + src0.w \times src1.w - dst.z = src0.x \times src1.x + src0.y \times src1.y + src0.z \times src1.z + src0.w \times src1.w - dst.w = src0.x \times src1.x + src0.y \times src1.y + src0.z \times src1.z + src0.w \times src1.w - - -DST - Distance Vector +.. opcode:: DST - Distance Vector .. math:: @@ -169,7 +170,7 @@ DST - Distance Vector dst.w = src1.w -MIN - Minimum +.. opcode:: MIN - Minimum .. math:: @@ -182,7 +183,7 @@ MIN - Minimum dst.w = min(src0.w, src1.w) -MAX - Maximum +.. opcode:: MAX - Maximum .. math:: @@ -195,7 +196,7 @@ MAX - Maximum dst.w = max(src0.w, src1.w) -SLT - Set On Less Than +.. opcode:: SLT - Set On Less Than .. math:: @@ -208,7 +209,7 @@ SLT - Set On Less Than dst.w = (src0.w < src1.w) ? 1 : 0 -SGE - Set On Greater Equal Than +.. opcode:: SGE - Set On Greater Equal Than .. math:: @@ -221,7 +222,7 @@ SGE - Set On Greater Equal Than dst.w = (src0.w >= src1.w) ? 1 : 0 -MAD - Multiply And Add +.. opcode:: MAD - Multiply And Add .. math:: @@ -234,7 +235,7 @@ MAD - Multiply And Add dst.w = src0.w \times src1.w + src2.w -SUB - Subtract +.. opcode:: SUB - Subtract .. math:: @@ -247,7 +248,7 @@ SUB - Subtract dst.w = src0.w - src1.w -LRP - Linear Interpolate +.. opcode:: LRP - Linear Interpolate .. math:: @@ -260,7 +261,7 @@ LRP - Linear Interpolate dst.w = src0.w \times src1.w + (1 - src0.w) \times src2.w -CND - Condition +.. opcode:: CND - Condition .. math:: @@ -273,7 +274,7 @@ CND - Condition dst.w = (src2.w > 0.5) ? src0.w : src1.w -DP2A - 2-component Dot Product And Add +.. opcode:: DP2A - 2-component Dot Product And Add .. math:: @@ -286,7 +287,7 @@ DP2A - 2-component Dot Product And Add dst.w = src0.x \times src1.x + src0.y \times src1.y + src2.x -FRAC - Fraction +.. opcode:: FRAC - Fraction .. math:: @@ -299,7 +300,7 @@ FRAC - Fraction dst.w = src.w - \lfloor src.w\rfloor -CLAMP - Clamp +.. opcode:: CLAMP - Clamp .. math:: @@ -312,9 +313,9 @@ CLAMP - Clamp dst.w = clamp(src0.w, src1.w, src2.w) -FLR - Floor +.. opcode:: FLR - Floor -This is identical to ARL. +This is identical to :opcode:`ARL`. .. math:: @@ -327,7 +328,7 @@ This is identical to ARL. dst.w = \lfloor src.w\rfloor -ROUND - Round +.. opcode:: ROUND - Round .. math:: @@ -340,45 +341,33 @@ ROUND - Round dst.w = round(src.w) -EX2 - Exponential Base 2 +.. opcode:: EX2 - Exponential Base 2 -.. math:: +This instruction replicates its result. - dst.x = 2^{src.x} - - dst.y = 2^{src.x} +.. math:: - dst.z = 2^{src.x} + dst = 2^{src.x} - dst.w = 2^{src.x} +.. opcode:: LG2 - Logarithm Base 2 -LG2 - Logarithm Base 2 +This instruction replicates its result. .. math:: - dst.x = \log_2{src.x} - - dst.y = \log_2{src.x} - - dst.z = \log_2{src.x} + dst = \log_2{src.x} - dst.w = \log_2{src.x} +.. opcode:: POW - Power -POW - Power +This instruction replicates its result. .. math:: - dst.x = src0.x^{src1.x} + dst = src0.x^{src1.x} - dst.y = src0.x^{src1.x} - - dst.z = src0.x^{src1.x} - - dst.w = src0.x^{src1.x} - -XPD - Cross Product +.. opcode:: XPD - Cross Product .. math:: @@ -391,7 +380,7 @@ XPD - Cross Product dst.w = 1 -ABS - Absolute +.. opcode:: ABS - Absolute .. math:: @@ -404,48 +393,36 @@ ABS - Absolute dst.w = |src.w| -RCC - Reciprocal Clamped +.. opcode:: RCC - Reciprocal Clamped + +This instruction replicates its result. XXX cleanup on aisle three .. math:: - dst.x = (1 / src.x) > 0 ? clamp(1 / src.x, 5.42101e-020, 1.884467e+019) : clamp(1 / src.x, -1.884467e+019, -5.42101e-020) - - dst.y = (1 / src.x) > 0 ? clamp(1 / src.x, 5.42101e-020, 1.884467e+019) : clamp(1 / src.x, -1.884467e+019, -5.42101e-020) - - dst.z = (1 / src.x) > 0 ? clamp(1 / src.x, 5.42101e-020, 1.884467e+019) : clamp(1 / src.x, -1.884467e+019, -5.42101e-020) + dst = (1 / src.x) > 0 ? clamp(1 / src.x, 5.42101e-020, 1.884467e+019) : clamp(1 / src.x, -1.884467e+019, -5.42101e-020) - dst.w = (1 / src.x) > 0 ? clamp(1 / src.x, 5.42101e-020, 1.884467e+019) : clamp(1 / src.x, -1.884467e+019, -5.42101e-020) +.. opcode:: DPH - Homogeneous Dot Product -DPH - Homogeneous Dot Product +This instruction replicates its result. .. math:: - dst.x = src0.x \times src1.x + src0.y \times src1.y + src0.z \times src1.z + src1.w + dst = src0.x \times src1.x + src0.y \times src1.y + src0.z \times src1.z + src1.w - dst.y = src0.x \times src1.x + src0.y \times src1.y + src0.z \times src1.z + src1.w - dst.z = src0.x \times src1.x + src0.y \times src1.y + src0.z \times src1.z + src1.w +.. opcode:: COS - Cosine - dst.w = src0.x \times src1.x + src0.y \times src1.y + src0.z \times src1.z + src1.w - - -COS - Cosine +This instruction replicates its result. .. math:: - dst.x = \cos{src.x} - - dst.y = \cos{src.x} - - dst.z = \cos{src.x} + dst = \cos{src.x} - dst.w = \cos{src.x} - -DDX - Derivative Relative To X +.. opcode:: DDX - Derivative Relative To X .. math:: @@ -458,7 +435,7 @@ DDX - Derivative Relative To X dst.w = partialx(src.w) -DDY - Derivative Relative To Y +.. opcode:: DDY - Derivative Relative To Y .. math:: @@ -471,32 +448,32 @@ DDY - Derivative Relative To Y dst.w = partialy(src.w) -KILP - Predicated Discard +.. opcode:: KILP - Predicated Discard discard -PK2H - Pack Two 16-bit Floats +.. opcode:: PK2H - Pack Two 16-bit Floats TBD -PK2US - Pack Two Unsigned 16-bit Scalars +.. opcode:: PK2US - Pack Two Unsigned 16-bit Scalars TBD -PK4B - Pack Four Signed 8-bit Scalars +.. opcode:: PK4B - Pack Four Signed 8-bit Scalars TBD -PK4UB - Pack Four Unsigned 8-bit Scalars +.. opcode:: PK4UB - Pack Four Unsigned 8-bit Scalars TBD -RFL - Reflection Vector +.. opcode:: RFL - Reflection Vector .. math:: @@ -508,10 +485,12 @@ RFL - Reflection Vector dst.w = 1 -Considered for removal. +.. note:: + + Considered for removal. -SEQ - Set On Equal +.. opcode:: SEQ - Set On Equal .. math:: @@ -524,21 +503,20 @@ SEQ - Set On Equal dst.w = (src0.w == src1.w) ? 1 : 0 -SFL - Set On False +.. opcode:: SFL - Set On False -.. math:: +This instruction replicates its result. - dst.x = 0 +.. math:: - dst.y = 0 + dst = 0 - dst.z = 0 +.. note:: - dst.w = 0 + Considered for removal. -Considered for removal. -SGT - Set On Greater Than +.. opcode:: SGT - Set On Greater Than .. math:: @@ -551,20 +529,16 @@ SGT - Set On Greater Than dst.w = (src0.w > src1.w) ? 1 : 0 -SIN - Sine +.. opcode:: SIN - Sine -.. math:: +This instruction replicates its result. - dst.x = \sin{src.x} - - dst.y = \sin{src.x} - - dst.z = \sin{src.x} +.. math:: - dst.w = \sin{src.x} + dst = \sin{src.x} -SLE - Set On Less Equal Than +.. opcode:: SLE - Set On Less Equal Than .. math:: @@ -577,7 +551,7 @@ SLE - Set On Less Equal Than dst.w = (src0.w <= src1.w) ? 1 : 0 -SNE - Set On Not Equal +.. opcode:: SNE - Set On Not Equal .. math:: @@ -590,59 +564,63 @@ SNE - Set On Not Equal dst.w = (src0.w != src1.w) ? 1 : 0 -STR - Set On True +.. opcode:: STR - Set On True -.. math:: +This instruction replicates its result. - dst.x = 1 - - dst.y = 1 - - dst.z = 1 +.. math:: - dst.w = 1 + dst = 1 -TEX - Texture Lookup +.. opcode:: TEX - Texture Lookup TBD -TXD - Texture Lookup with Derivatives +.. opcode:: TXD - Texture Lookup with Derivatives TBD -TXP - Projective Texture Lookup +.. opcode:: TXP - Projective Texture Lookup TBD -UP2H - Unpack Two 16-Bit Floats +.. opcode:: UP2H - Unpack Two 16-Bit Floats TBD - Considered for removal. +.. note:: -UP2US - Unpack Two Unsigned 16-Bit Scalars + Considered for removal. + +.. opcode:: UP2US - Unpack Two Unsigned 16-Bit Scalars TBD - Considered for removal. +.. note:: + + Considered for removal. -UP4B - Unpack Four Signed 8-Bit Values +.. opcode:: UP4B - Unpack Four Signed 8-Bit Values TBD - Considered for removal. +.. note:: + + Considered for removal. -UP4UB - Unpack Four Unsigned 8-Bit Scalars +.. opcode:: UP4UB - Unpack Four Unsigned 8-Bit Scalars TBD - Considered for removal. +.. note:: -X2D - 2D Coordinate Transformation + Considered for removal. + +.. opcode:: X2D - 2D Coordinate Transformation .. math:: @@ -654,20 +632,24 @@ X2D - 2D Coordinate Transformation dst.w = src0.y + src1.x \times src2.z + src1.y \times src2.w -Considered for removal. +.. note:: + + Considered for removal. From GL_NV_vertex_program2 ^^^^^^^^^^^^^^^^^^^^^^^^^^ -ARA - Address Register Add +.. opcode:: ARA - Address Register Add TBD - Considered for removal. +.. note:: -ARR - Address Register Load With Round + Considered for removal. + +.. opcode:: ARR - Address Register Load With Round .. math:: @@ -680,26 +662,28 @@ ARR - Address Register Load With Round dst.w = round(src.w) -BRA - Branch +.. opcode:: BRA - Branch pc = target - Considered for removal. +.. note:: + + Considered for removal. -CAL - Subroutine Call +.. opcode:: CAL - Subroutine Call push(pc) pc = target -RET - Subroutine Call Return +.. opcode:: RET - Subroutine Call Return pc = pop() Potential restrictions: * Only occurs at end of function. -SSG - Set Sign +.. opcode:: SSG - Set Sign .. math:: @@ -712,7 +696,7 @@ SSG - Set Sign dst.w = (src.w > 0) ? 1 : (src.w < 0) ? -1 : 0 -CMP - Compare +.. opcode:: CMP - Compare .. math:: @@ -725,7 +709,7 @@ CMP - Compare dst.w = (src0.w < 0) ? src1.w : src2.w -KIL - Conditional Discard +.. opcode:: KIL - Conditional Discard .. math:: @@ -734,7 +718,7 @@ KIL - Conditional Discard endif -SCS - Sine Cosine +.. opcode:: SCS - Sine Cosine .. math:: @@ -747,12 +731,12 @@ SCS - Sine Cosine dst.y = 1 -TXB - Texture Lookup With Bias +.. opcode:: TXB - Texture Lookup With Bias TBD -NRM - 3-component Vector Normalise +.. opcode:: NRM - 3-component Vector Normalise .. math:: @@ -765,7 +749,7 @@ NRM - 3-component Vector Normalise dst.w = 1 -DIV - Divide +.. opcode:: DIV - Divide .. math:: @@ -778,35 +762,31 @@ DIV - Divide dst.w = \frac{src0.w}{src1.w} -DP2 - 2-component Dot Product - -.. math:: - - dst.x = src0.x \times src1.x + src0.y \times src1.y +.. opcode:: DP2 - 2-component Dot Product - dst.y = src0.x \times src1.x + src0.y \times src1.y +This instruction replicates its result. - dst.z = src0.x \times src1.x + src0.y \times src1.y +.. math:: - dst.w = src0.x \times src1.x + src0.y \times src1.y + dst = src0.x \times src1.x + src0.y \times src1.y -TXL - Texture Lookup With LOD +.. opcode:: TXL - Texture Lookup With LOD TBD -BRK - Break +.. opcode:: BRK - Break TBD -IF - If +.. opcode:: IF - If TBD -BGNFOR - Begin a For-Loop +.. opcode:: BGNFOR - Begin a For-Loop dst.x = floor(src.x) dst.y = floor(src.y) @@ -819,25 +799,31 @@ BGNFOR - Begin a For-Loop Note: The destination must be a loop register. The source must be a constant register. - Considered for cleanup / removal. +.. note:: + Considered for cleanup. -REP - Repeat +.. note:: + + Considered for removal. + + +.. opcode:: REP - Repeat TBD -ELSE - Else +.. opcode:: ELSE - Else TBD -ENDIF - End If +.. opcode:: ENDIF - End If TBD -ENDFOR - End a For-Loop +.. opcode:: ENDFOR - End a For-Loop dst.x = dst.x + dst.z dst.y = dst.y - 1.0 @@ -848,30 +834,48 @@ ENDFOR - End a For-Loop Note: The destination must be a loop register. - Considered for cleanup / removal. +.. note:: + + Considered for cleanup. + +.. note:: -ENDREP - End Repeat + Considered for removal. + +.. opcode:: ENDREP - End Repeat TBD -PUSHA - Push Address Register On Stack +.. opcode:: PUSHA - Push Address Register On Stack push(src.x) push(src.y) push(src.z) push(src.w) - Considered for cleanup / removal. +.. note:: + + Considered for cleanup. + +.. note:: -POPA - Pop Address Register From Stack + Considered for removal. + +.. opcode:: POPA - Pop Address Register From Stack dst.w = pop() dst.z = pop() dst.y = pop() dst.x = pop() - Considered for cleanup / removal. +.. note:: + + Considered for cleanup. + +.. note:: + + Considered for removal. From GL_NV_gpu_program4 @@ -879,7 +883,7 @@ From GL_NV_gpu_program4 Support for these opcodes indicated by a special pipe capability bit (TBD). -CEIL - Ceiling +.. opcode:: CEIL - Ceiling .. math:: @@ -892,7 +896,7 @@ CEIL - Ceiling dst.w = \lceil src.w\rceil -I2F - Integer To Float +.. opcode:: I2F - Integer To Float .. math:: @@ -905,7 +909,7 @@ I2F - Integer To Float dst.w = (float) src.w -NOT - Bitwise Not +.. opcode:: NOT - Bitwise Not .. math:: @@ -918,7 +922,7 @@ NOT - Bitwise Not dst.w = ~src.w -TRUNC - Truncate +.. opcode:: TRUNC - Truncate .. math:: @@ -931,7 +935,7 @@ TRUNC - Truncate dst.w = trunc(src.w) -SHL - Shift Left +.. opcode:: SHL - Shift Left .. math:: @@ -944,7 +948,7 @@ SHL - Shift Left dst.w = src0.w << src1.x -SHR - Shift Right +.. opcode:: SHR - Shift Right .. math:: @@ -957,7 +961,7 @@ SHR - Shift Right dst.w = src0.w >> src1.x -AND - Bitwise And +.. opcode:: AND - Bitwise And .. math:: @@ -970,7 +974,7 @@ AND - Bitwise And dst.w = src0.w & src1.w -OR - Bitwise Or +.. opcode:: OR - Bitwise Or .. math:: @@ -983,7 +987,7 @@ OR - Bitwise Or dst.w = src0.w | src1.w -MOD - Modulus +.. opcode:: MOD - Modulus .. math:: @@ -996,7 +1000,7 @@ MOD - Modulus dst.w = src0.w \bmod src1.w -XOR - Bitwise Xor +.. opcode:: XOR - Bitwise Xor .. math:: @@ -1009,7 +1013,7 @@ XOR - Bitwise Xor dst.w = src0.w \oplus src1.w -SAD - Sum Of Absolute Differences +.. opcode:: SAD - Sum Of Absolute Differences .. math:: @@ -1022,17 +1026,17 @@ SAD - Sum Of Absolute Differences dst.w = |src0.w - src1.w| + src2.w -TXF - Texel Fetch +.. opcode:: TXF - Texel Fetch TBD -TXQ - Texture Size Query +.. opcode:: TXQ - Texture Size Query TBD -CONT - Continue +.. opcode:: CONT - Continue TBD @@ -1041,12 +1045,12 @@ From GL_NV_geometry_program4 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -EMIT - Emit +.. opcode:: EMIT - Emit TBD -ENDPRIM - End Primitive +.. opcode:: ENDPRIM - End Primitive TBD @@ -1055,66 +1059,64 @@ From GLSL ^^^^^^^^^^ -BGNLOOP - Begin a Loop +.. opcode:: BGNLOOP - Begin a Loop TBD -BGNSUB - Begin Subroutine +.. opcode:: BGNSUB - Begin Subroutine TBD -ENDLOOP - End a Loop +.. opcode:: ENDLOOP - End a Loop TBD -ENDSUB - End Subroutine +.. opcode:: ENDSUB - End Subroutine TBD -NOP - No Operation +.. opcode:: NOP - No Operation Do nothing. -NRM4 - 4-component Vector Normalise - -.. math:: +.. opcode:: NRM4 - 4-component Vector Normalise - dst.x = \frac{src.x}{src.x \times src.x + src.y \times src.y + src.z \times src.z + src.w \times src.w} +This instruction replicates its result. - dst.y = \frac{src.y}{src.x \times src.x + src.y \times src.y + src.z \times src.z + src.w \times src.w} - - dst.z = \frac{src.z}{src.x \times src.x + src.y \times src.y + src.z \times src.z + src.w \times src.w} +.. math:: - dst.w = \frac{src.w}{src.x \times src.x + src.y \times src.y + src.z \times src.z + src.w \times src.w} + dst = \frac{src.x}{src.x \times src.x + src.y \times src.y + src.z \times src.z + src.w \times src.w} ps_2_x ^^^^^^^^^^^^ -CALLNZ - Subroutine Call If Not Zero +.. opcode:: CALLNZ - Subroutine Call If Not Zero TBD -IFC - If +.. opcode:: IFC - If TBD -BREAKC - Break Conditional +.. opcode:: BREAKC - Break Conditional TBD +.. _doubleopcodes: + Double Opcodes ^^^^^^^^^^^^^^^ -DADD - Add Double +.. opcode:: DADD - Add Double .. math:: @@ -1123,7 +1125,7 @@ DADD - Add Double dst.zw = src0.zw + src1.zw -DDIV - Divide Double +.. opcode:: DDIV - Divide Double .. math:: @@ -1131,7 +1133,7 @@ DDIV - Divide Double dst.zw = src0.zw / src1.zw -DSEQ - Set Double on Equal +.. opcode:: DSEQ - Set Double on Equal .. math:: @@ -1139,7 +1141,7 @@ DSEQ - Set Double on Equal dst.zw = src0.zw == src1.zw ? 1.0F : 0.0F -DSLT - Set Double on Less than +.. opcode:: DSLT - Set Double on Less than .. math:: @@ -1147,7 +1149,7 @@ DSLT - Set Double on Less than dst.zw = src0.zw < src1.zw ? 1.0F : 0.0F -DFRAC - Double Fraction +.. opcode:: DFRAC - Double Fraction .. math:: @@ -1156,7 +1158,7 @@ DFRAC - Double Fraction dst.zw = src.zw - \lfloor src.zw\rfloor -DFRACEXP - Convert Double Number to Fractional and Integral Components +.. opcode:: DFRACEXP - Convert Double Number to Fractional and Integral Components .. math:: @@ -1164,7 +1166,7 @@ DFRACEXP - Convert Double Number to Fractional and Integral Components dst0.zw = frexp(src.zw, dst1.zw) -DLDEXP - Multiple Double Number by Integral Power of 2 +.. opcode:: DLDEXP - Multiple Double Number by Integral Power of 2 .. math:: @@ -1172,7 +1174,7 @@ DLDEXP - Multiple Double Number by Integral Power of 2 dst.zw = ldexp(src0.zw, src1.zw) -DMIN - Minimum Double +.. opcode:: DMIN - Minimum Double .. math:: @@ -1180,7 +1182,7 @@ DMIN - Minimum Double dst.zw = min(src0.zw, src1.zw) -DMAX - Maximum Double +.. opcode:: DMAX - Maximum Double .. math:: @@ -1188,7 +1190,7 @@ DMAX - Maximum Double dst.zw = max(src0.zw, src1.zw) -DMUL - Multiply Double +.. opcode:: DMUL - Multiply Double .. math:: @@ -1197,7 +1199,7 @@ DMUL - Multiply Double dst.zw = src0.zw \times src1.zw -DMAD - Multiply And Add Doubles +.. opcode:: DMAD - Multiply And Add Doubles .. math:: @@ -1206,7 +1208,7 @@ DMAD - Multiply And Add Doubles dst.zw = src0.zw \times src1.zw + src2.zw -DRCP - Reciprocal Double +.. opcode:: DRCP - Reciprocal Double .. math:: @@ -1214,7 +1216,7 @@ DRCP - Reciprocal Double dst.zw = \frac{1}{src.zw} -DSQRT - Square root double +.. opcode:: DSQRT - Square root double .. math:: @@ -1269,20 +1271,8 @@ Keywords discard Discard fragment. - dst First destination register. - - dst0 First destination register. - pc Program counter. - src First source register. - - src0 First source register. - - src1 Second source register. - - src2 Third source register. - target Label of target instruction. @@ -1441,3 +1431,43 @@ GL_ARB_fragment_coord_conventions extension. DirectX 9 uses INTEGER. DirectX 10 uses HALF_INTEGER. + + + +Texture Sampling and Texture Formats +------------------------------------ + +This table shows how texture image components are returned as (x,y,z,w) tuples +by TGSI texture instructions, such as :opcode:`TEX`, :opcode:`TXD`, and +:opcode:`TXP`. For reference, OpenGL and Direct3D conventions are shown as +well. + ++--------------------+--------------+--------------------+--------------+ +| Texture Components | Gallium | OpenGL | Direct3D 9 | ++====================+==============+====================+==============+ +| R | XXX TBD | (r, 0, 0, 1) | (r, 1, 1, 1) | ++--------------------+--------------+--------------------+--------------+ +| RG | XXX TBD | (r, g, 0, 1) | (r, g, 1, 1) | ++--------------------+--------------+--------------------+--------------+ +| RGB | (r, g, b, 1) | (r, g, b, 1) | (r, g, b, 1) | ++--------------------+--------------+--------------------+--------------+ +| RGBA | (r, g, b, a) | (r, g, b, a) | (r, g, b, a) | ++--------------------+--------------+--------------------+--------------+ +| A | (0, 0, 0, a) | (0, 0, 0, a) | (0, 0, 0, a) | ++--------------------+--------------+--------------------+--------------+ +| L | (l, l, l, 1) | (l, l, l, 1) | (l, l, l, 1) | ++--------------------+--------------+--------------------+--------------+ +| LA | (l, l, l, a) | (l, l, l, a) | (l, l, l, a) | ++--------------------+--------------+--------------------+--------------+ +| I | (i, i, i, i) | (i, i, i, i) | N/A | ++--------------------+--------------+--------------------+--------------+ +| UV | XXX TBD | (0, 0, 0, 1) | (u, v, 1, 1) | +| | | [#envmap-bumpmap]_ | | ++--------------------+--------------+--------------------+--------------+ +| Z | XXX TBD | (z, z, z, 1) | (0, z, 0, 1) | +| | | [#depth-tex-mode]_ | | ++--------------------+--------------+--------------------+--------------+ + +.. [#envmap-bumpmap] http://www.opengl.org/registry/specs/ATI/envmap_bumpmap.txt +.. [#depth-tex-mode] the default is (z, z, z, 1) but may also be (0, 0, 0, z) + or (z, z, z, z) depending on the value of GL_DEPTH_TEXTURE_MODE. |