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 <imirkin@alum.mit.edu>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Resource Access Opcodes
^^^^^^^^^^^^^^^^^^^^^^^
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``
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
Using the provided integer address, LOAD fetches data
from the specified buffer or texture without any
Syntax: ``STORE resource, address, src``
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.
Using the provided integer address, STORE writes data
to the specified buffer or texture.
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
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``
.. 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:
- 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``
.. 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:
- 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``
.. 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:
- 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``
.. 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:
- 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``
.. 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:
- 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``
.. 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:
- 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``
.. 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:
- 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``
.. 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:
- 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``
.. 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:
- 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``
.. 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:
- 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)