Module: Mesa Branch: master Commit: 8cb493acc70ffcbb244755434def6c7d41a6f6c1 URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=8cb493acc70ffcbb244755434def6c7d41a6f6c1
Author: Ilia Mirkin <[email protected]> Date: Sun Sep 27 01:23:38 2015 -0400 tgsi: update atomic op docs Specify that the operation only applies to the x component, not per-component as previously specified. This is unnecessary for GL and creates additional complications for images which need to support these operations as well. Signed-off-by: Ilia Mirkin <[email protected]> Reviewed-by: Marek Olšák <[email protected]> --- src/gallium/docs/source/tgsi.rst | 93 +++++++++++++++++++------------------- 1 file changed, 47 insertions(+), 46 deletions(-) diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst index 8fe971b..b6acc3f 100644 --- a/src/gallium/docs/source/tgsi.rst +++ b/src/gallium/docs/source/tgsi.rst @@ -2264,11 +2264,11 @@ after lookup. Resource Access Opcodes ^^^^^^^^^^^^^^^^^^^^^^^ -.. opcode:: LOAD - Fetch data from a shader resource +.. opcode:: LOAD - Fetch data from a shader buffer or image Syntax: ``LOAD dst, resource, address`` - Example: ``LOAD TEMP[0], RES[0], TEMP[1]`` + Example: ``LOAD TEMP[0], BUFFER[0], TEMP[1]`` Using the provided integer address, LOAD fetches data from the specified buffer or texture without any @@ -2292,7 +2292,7 @@ Resource Access Opcodes Syntax: ``STORE resource, address, src`` - Example: ``STORE RES[0], TEMP[0], TEMP[1]`` + Example: ``STORE BUFFER[0], TEMP[0], TEMP[1]`` Using the provided integer address, STORE writes data to the specified buffer or texture. @@ -2370,158 +2370,159 @@ These opcodes provide atomic variants of some common arithmetic and logical operations. In this context atomicity means that another concurrent memory access operation that affects the same memory location is guaranteed to be performed strictly before or after the -entire execution of the atomic operation. - -For the moment they're only valid in compute programs. +entire execution of the atomic operation. The resource may be a buffer +or an image. In the case of an image, the offset works the same as for +``LOAD`` and ``STORE``, specified above. These atomic operations may +only be used with 32-bit integer image formats. .. opcode:: ATOMUADD - Atomic integer addition Syntax: ``ATOMUADD dst, resource, offset, src`` - Example: ``ATOMUADD TEMP[0], RES[0], TEMP[1], TEMP[2]`` + Example: ``ATOMUADD TEMP[0], BUFFER[0], TEMP[1], TEMP[2]`` - The following operation is performed atomically on each component: + The following operation is performed atomically: .. math:: - dst_i = resource[offset]_i + dst_x = resource[offset] - resource[offset]_i = dst_i + src_i + resource[offset] = dst_x + src_x .. opcode:: ATOMXCHG - Atomic exchange Syntax: ``ATOMXCHG dst, resource, offset, src`` - Example: ``ATOMXCHG TEMP[0], RES[0], TEMP[1], TEMP[2]`` + Example: ``ATOMXCHG TEMP[0], BUFFER[0], TEMP[1], TEMP[2]`` - The following operation is performed atomically on each component: + The following operation is performed atomically: .. math:: - dst_i = resource[offset]_i + dst_x = resource[offset] - resource[offset]_i = src_i + resource[offset] = src_x .. opcode:: ATOMCAS - Atomic compare-and-exchange Syntax: ``ATOMCAS dst, resource, offset, cmp, src`` - Example: ``ATOMCAS TEMP[0], RES[0], TEMP[1], TEMP[2], TEMP[3]`` + Example: ``ATOMCAS TEMP[0], BUFFER[0], TEMP[1], TEMP[2], TEMP[3]`` - The following operation is performed atomically on each component: + The following operation is performed atomically: .. math:: - dst_i = resource[offset]_i + dst_x = resource[offset] - resource[offset]_i = (dst_i == cmp_i ? src_i : dst_i) + resource[offset] = (dst_x == cmp_x ? src_x : dst_x) .. opcode:: ATOMAND - Atomic bitwise And Syntax: ``ATOMAND dst, resource, offset, src`` - Example: ``ATOMAND TEMP[0], RES[0], TEMP[1], TEMP[2]`` + Example: ``ATOMAND TEMP[0], BUFFER[0], TEMP[1], TEMP[2]`` - The following operation is performed atomically on each component: + The following operation is performed atomically: .. math:: - dst_i = resource[offset]_i + dst_x = resource[offset] - resource[offset]_i = dst_i \& src_i + resource[offset] = dst_x \& src_x .. opcode:: ATOMOR - Atomic bitwise Or Syntax: ``ATOMOR dst, resource, offset, src`` - Example: ``ATOMOR TEMP[0], RES[0], TEMP[1], TEMP[2]`` + Example: ``ATOMOR TEMP[0], BUFFER[0], TEMP[1], TEMP[2]`` - The following operation is performed atomically on each component: + The following operation is performed atomically: .. math:: - dst_i = resource[offset]_i + dst_x = resource[offset] - resource[offset]_i = dst_i | src_i + resource[offset] = dst_x | src_x .. opcode:: ATOMXOR - Atomic bitwise Xor Syntax: ``ATOMXOR dst, resource, offset, src`` - Example: ``ATOMXOR TEMP[0], RES[0], TEMP[1], TEMP[2]`` + Example: ``ATOMXOR TEMP[0], BUFFER[0], TEMP[1], TEMP[2]`` - The following operation is performed atomically on each component: + The following operation is performed atomically: .. math:: - dst_i = resource[offset]_i + dst_x = resource[offset] - resource[offset]_i = dst_i \oplus src_i + resource[offset] = dst_x \oplus src_x .. opcode:: ATOMUMIN - Atomic unsigned minimum Syntax: ``ATOMUMIN dst, resource, offset, src`` - Example: ``ATOMUMIN TEMP[0], RES[0], TEMP[1], TEMP[2]`` + Example: ``ATOMUMIN TEMP[0], BUFFER[0], TEMP[1], TEMP[2]`` - The following operation is performed atomically on each component: + The following operation is performed atomically: .. math:: - dst_i = resource[offset]_i + dst_x = resource[offset] - resource[offset]_i = (dst_i < src_i ? dst_i : src_i) + resource[offset] = (dst_x < src_x ? dst_x : src_x) .. opcode:: ATOMUMAX - Atomic unsigned maximum Syntax: ``ATOMUMAX dst, resource, offset, src`` - Example: ``ATOMUMAX TEMP[0], RES[0], TEMP[1], TEMP[2]`` + Example: ``ATOMUMAX TEMP[0], BUFFER[0], TEMP[1], TEMP[2]`` - The following operation is performed atomically on each component: + The following operation is performed atomically: .. math:: - dst_i = resource[offset]_i + dst_x = resource[offset] - resource[offset]_i = (dst_i > src_i ? dst_i : src_i) + resource[offset] = (dst_x > src_x ? dst_x : src_x) .. opcode:: ATOMIMIN - Atomic signed minimum Syntax: ``ATOMIMIN dst, resource, offset, src`` - Example: ``ATOMIMIN TEMP[0], RES[0], TEMP[1], TEMP[2]`` + Example: ``ATOMIMIN TEMP[0], BUFFER[0], TEMP[1], TEMP[2]`` - The following operation is performed atomically on each component: + The following operation is performed atomically: .. math:: - dst_i = resource[offset]_i + dst_x = resource[offset] - resource[offset]_i = (dst_i < src_i ? dst_i : src_i) + resource[offset] = (dst_x < src_x ? dst_x : src_x) .. opcode:: ATOMIMAX - Atomic signed maximum Syntax: ``ATOMIMAX dst, resource, offset, src`` - Example: ``ATOMIMAX TEMP[0], RES[0], TEMP[1], TEMP[2]`` + Example: ``ATOMIMAX TEMP[0], BUFFER[0], TEMP[1], TEMP[2]`` - The following operation is performed atomically on each component: + The following operation is performed atomically: .. math:: - dst_i = resource[offset]_i + dst_x = resource[offset] - resource[offset]_i = (dst_i > src_i ? dst_i : src_i) + resource[offset] = (dst_x > src_x ? dst_x : src_x) _______________________________________________ mesa-commit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-commit
