.. opcode:: PK2US - Pack Two Unsigned 16-bit Scalars
- TBD
+This instruction replicates its result.
+
+.. math::
+
+ dst = f32\_to\_unorm16(src.x) | f32\_to\_unorm16(src.y) << 16
.. opcode:: PK4B - Pack Four Signed 8-bit Scalars
- TBD
+This instruction replicates its result.
+
+.. math::
+
+ dst = f32\_to\_snorm8(src.x) |
+ (f32\_to\_snorm8(src.y) << 8) |
+ (f32\_to\_snorm8(src.z) << 16) |
+ (f32\_to\_snorm8(src.w) << 24)
.. opcode:: PK4UB - Pack Four Unsigned 8-bit Scalars
- TBD
+This instruction replicates its result.
+
+.. math::
+
+ dst = f32\_to\_unorm8(src.x) |
+ (f32\_to\_unorm8(src.y) << 8) |
+ (f32\_to\_unorm8(src.z) << 16) |
+ (f32\_to\_unorm8(src.w) << 24)
.. opcode:: SEQ - Set On Equal
barrier in between.
+.. _bindlessopcodes:
+
+Bindless Opcodes
+^^^^^^^^^^^^^^^^
+
+These opcodes are for working with bindless sampler or image handles and
+require PIPE_CAP_BINDLESS_TEXTURE.
+
+.. opcode:: IMG2HND - Get a bindless handle for a image
+
+ Syntax: ``IMG2HND dst, image``
+
+ Example: ``IMG2HND TEMP[0], IMAGE[0]``
+
+ Sets 'dst' to a bindless handle for 'image'.
+
+.. opcode:: SAMP2HND - Get a bindless handle for a sampler
+
+ Syntax: ``SAMP2HND dst, sampler``
+
+ Example: ``SAMP2HND TEMP[0], SAMP[0]``
+
+ Sets 'dst' to a bindless handle for 'sampler'.
+
+
.. _threadsyncopcodes:
Inter-thread synchronization opcodes
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. The resource may be a BUFFER,
-IMAGE, or MEMORY. 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.
+IMAGE, HWATOMIC, or MEMORY. In the case of an image, the offset works
+the same as for ``LOAD`` and ``STORE``, specified above. For atomic
+counters, the offset is an immediate index to the base hw atomic
+counter for this operation.
+These atomic operations may only be used with 32-bit integer image formats.
.. opcode:: ATOMUADD - Atomic integer addition
resource[offset] = dst_x + src_x
+.. opcode:: ATOMFADD - Atomic floating point addition
+
+ Syntax: ``ATOMFADD dst, resource, offset, src``
+
+ Example: ``ATOMFADD TEMP[0], BUFFER[0], TEMP[1], TEMP[2]``
+
+ The following operation is performed atomically:
+
+.. math::
+
+ dst_x = resource[offset]
+
+ resource[offset] = dst_x + src_x
+
+
.. opcode:: ATOMXCHG - Atomic exchange
Syntax: ``ATOMXCHG dst, resource, offset, src``
resource[offset] = (dst_x > src_x ? dst_x : src_x)
+.. opcode:: ATOMINC_WRAP - Atomic increment + wrap around
+
+ Syntax: ``ATOMINC_WRAP dst, resource, offset, src``
+
+ Example: ``ATOMINC_WRAP TEMP[0], BUFFER[0], TEMP[1], TEMP[2]``
+
+ The following operation is performed atomically:
+
+.. math::
+
+ dst_x = resource[offset] + 1
+
+ resource[offset] = dst_x <= src_x ? dst_x : 0
+
+
+.. opcode:: ATOMDEC_WRAP - Atomic decrement + wrap around
+
+ Syntax: ``ATOMDEC_WRAP dst, resource, offset, src``
+
+ Example: ``ATOMDEC_WRAP TEMP[0], BUFFER[0], TEMP[1], TEMP[2]``
+
+ The following operation is performed atomically:
+
+.. math::
+
+ dst_x = resource[offset]
+
+ resource[offset] = (dst_x > 0 && dst_x < src_x) ? dst_x - 1 : 0
+
+
.. _interlaneopcodes:
Inter-lane opcodes
last vertex processing stage is used.
-TGSI_SEMANTIC_CULLDIST
-""""""""""""""""""""""
-
-Used as distance to plane for performing application-defined culling
-of individual primitives against a plane. When components of vertex
-elements are given this label, these values are assumed to be a
-float32 signed distance to a plane. Primitives will be completely
-discarded if the plane distance for all of the vertices in the
-primitive are < 0. If a vertex has a cull distance of NaN, that
-vertex counts as "out" (as if its < 0);
-The limits on both clip and cull distances are bound
-by the PIPE_MAX_CLIP_OR_CULL_DISTANCE_COUNT define which defines
-the maximum number of components that can be used to hold the
-distances and by the PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT
-which specifies the maximum number of registers which can be
-annotated with those semantics.
-
-
TGSI_SEMANTIC_CLIPDIST
""""""""""""""""""""""
``(1 << subgroup_invocation) - 1`` in arbitrary precision arithmetic.
+TGSI_SEMANTIC_TESS_DEFAULT_OUTER_LEVEL
+""""""""""""""""""""""""""""""""""""""
+
+A system value equal to the default_outer_level array set via set_tess_level.
+
+
+TGSI_SEMANTIC_TESS_DEFAULT_INNER_LEVEL
+""""""""""""""""""""""""""""""""""""""
+
+A system value equal to the default_inner_level array set via set_tess_level.
+
+
Declaration Interpolate
^^^^^^^^^^^^^^^^^^^^^^^
Usage of the STORE opcode is only allowed if the WR (writable) flag
is set.
+Hardware Atomic Register File
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Hardware atomics are declared as a 2D array with an optional array id.
+
+The first member of the dimension is the buffer resource the atomic
+is located in.
+The second member is a range into the buffer resource, either for
+one or multiple counters. If this is an array, the declaration will have
+an unique array id.
+
+Each counter is 4 bytes in size, and index and ranges are in counters not bytes.
+DCL HWATOMIC[0][0]
+DCL HWATOMIC[0][1]
+
+This declares two atomics, one at the start of the buffer and one in the
+second 4 bytes.
+
+DCL HWATOMIC[0][0]
+DCL HWATOMIC[1][0]
+DCL HWATOMIC[1][1..3], ARRAY(1)
+
+This declares 5 atomics, one in buffer 0 at 0,
+one in buffer 1 at 0, and an array of 3 atomics in
+the buffer 1, starting at 1.
Properties
^^^^^^^^^^^^^^^^^^^^^^^^
projects / mesa.git / blobdiff