Lines Matching refs:subgroup

69       - which shader stages support subgroup operations
71       - which subgroup features are supported (SUBGROUP_SUPPORTED_FEATURES_KHR)
72       - whether quad subgroup operations are supported in all
73         stages supporting subgroup operations (SUBGROUP_QUAD_ALL_STAGES_KHR)
76     minimal subset of SPIR-V 1.3 which is required to support the subgroup
128     A subgroup is a set of invocations that can synchronize and share data
142     The basic subgroup operations allow two classes of functionality within
143     shaders - elect and barrier. Invocations within a subgroup can choose a
144     single invocation to perform some task for the subgroup as a whole using
145     elect. Invocations within a subgroup can perform a subgroup barrier to
146     ensure the ordering of execution or memory accesses within a subgroup.
149     visible by other invocations within the subgroup. A _subgroupBarrier_ can
152     subgroup reaches a point of execution before any are allowed to continue.
156     The vote subgroup operations allow invocations within a subgroup to
157     compare values across a subgroup. The types of votes enabled are:
159     * Do all active subgroup invocations agree that an expression is true?
160     * Do any active subgroup invocations evaluate an expression to true?
161     * Do all active subgroup invocations have the same value of an expression?
166     subgroup and choose potentially faster code-paths in these cases.
170     The arithmetic subgroup operations allow invocations to perform scan
171     and reduction operations across a subgroup. For reduction operations,
172     each invocation in a subgroup will obtain the same result of these
173     arithmetic operations applied across the subgroup. For scan operations,
174     each invocation in the subgroup will perform an inclusive or exclusive
176     subgroup in an implementation-defined order. The operations supported
181     The ballot subgroup operations allow invocations to perform more
182     complex votes across the subgroup. The ballot functionality allows
183     all invocations within a subgroup to provide a boolean value and get
186     invocation to all other invocations within the subgroup, given that
192     The shuffle subgroup operations allow invocations to read values from
193     other invocations within a subgroup.
197     The shuffle relative subgroup operations allow invocations to read
198     values from other invocations within the subgroup relative to the
201     a subgroup.
205     The clustered subgroup operations allow invocations to perform
206     arithmetic operations among partitions of a subgroup, such that the
207     operation is only performed within the subgroup invocations within a
208     partition. The partitions for clustered subgroup operations are
215     The quad subgroup operations allow clusters of 4 invocations (a quad),
233     The subgroup size is the maximum number of invocations in a subgroup.
237     variable.  The subgroup size must be at least 1, and must be a power
239     per subgroup is 128.
244     determine which shader stages support the subgroup operations, call
249     subgroup operations.  All implementations must support at least
254     To determine which subgroup operations are supported by an
258     flags indicating which subgroup operations are supported by the
294     To determine whether subgroup quad operations (See SG.1.8) are
297     if subgroup quad operations are supported in all shader stages
298     which support subgroup operations. FALSE is returned if subgroup quad
442                                                             each subgroup
447     SUBGROUP_SUPPORTED_      E     GetIntegerv      Sec     Bitfield of subgroup          SG.2.3
465     2. What should happen if subgroup operations are attempted on
494        RESOLVED: (B) only add support for subgroup capabilities from SPIR-V