## Module amdgpu

Source
🔬This is a nightly-only experimental API. (`stdarch_amdgpu` #149988)
Available on `target_arch=amdgpu` only.
Expand description

Platform-specific intrinsics for the `amdgpu` platform.

See the module documentation for more details.

## Functions§

ballotExperimental
  Returns a bitfield (`u32` or `u64`) containing the result of its i1 argument in all active lanes, and zero in all inactive lanes.
dispatch_idExperimental
  Returns the id of the dispatch that is currently executed.
ds_bpermute⚠Experimental
  Gather data across all lanes in a wavefront.
ds_permute⚠Experimental
  Scatter data across all lanes in a wavefront.
endpgmExperimental
  Stop execution of the wavefront.
groupstaticsizeExperimental
  Returns the size of statically allocated shared memory for this program in bytes.
inverse_ballotExperimental
  Indexes into the `value` with the current lane id and returns for each lane if the corresponding bit is set.
mbcnt_hiExperimental
  Masked bit count, high 32 lanes.
mbcnt_loExperimental
  Masked bit count, low 32 lanes.
perm⚠Experimental
  Permute a 64-bit value.
permlane16_swap⚠Experimental
  Provide direct access to `v_permlane16_swap_b32` instruction on supported targets.
permlane16_u32⚠Experimental
  Performs arbitrary gather-style operation within a row (16 contiguous lanes) of the second input operand.
permlane16_var⚠Experimental
  Performs arbitrary gather-style operation within a row (16 contiguous lanes) of the second input operand.
permlane32_swap⚠Experimental
  Provide direct access to `v_permlane32_swap_b32` instruction on supported targets.
permlane64_u32⚠Experimental
  Swap `value` between upper and lower 32 lanes in a wavefront.
permlanex16_u32⚠Experimental
  Performs arbitrary gather-style operation across two rows (16 contiguous lanes) of the second input operand.
permlanex16_var⚠Experimental
  Performs arbitrary gather-style operation across two rows (16 contiguous lanes) of the second input operand.
readfirstlane_u32Experimental
  Get `value` from the first active lane in the wavefront.
readfirstlane_u64Experimental
  Get `value` from the first active lane in the wavefront.
readlane_u32⚠Experimental
  Get `value` from the lane at index `lane` in the wavefront.
readlane_u64⚠Experimental
  Get `value` from the lane at index `lane` in the wavefront.
s_barrierExperimental
  Synchronize all wavefronts in a workgroup.
s_barrier_signal⚠Experimental
  Signal a specific barrier type.
s_barrier_signal_isfirst⚠Experimental
  Signal a specific barrier type.
s_barrier_wait⚠Experimental
  Wait for a specific barrier type.
s_get_barrier_state⚠Experimental
  Get the state of a specific barrier type.
s_get_waveid_in_workgroupExperimental
  Get the index of the current wavefront in the workgroup.
s_getpcExperimental
  Returns the current process counter.
s_memrealtimeExperimental
  Measures time based on a fixed frequency.
s_sethaltExperimental
  Stop execution of the kernel.
s_sleepExperimental
  Sleeps for approximately `COUNT * 64` cycles.
sched_barrier⚠Experimental
  Prevent movement of some instruction types.
sched_group_barrier⚠Experimental
  Creates schedule groups with specific properties to create custom scheduling pipelines.
update_dpp⚠Experimental
  The `update_dpp` intrinsic represents the `update.dpp` operation in AMDGPU. It takes an old value, a source operand, a DPP control operand, a row mask, a bank mask, and a bound control. This operation is equivalent to a sequence of `v_mov_b32` operations.
wave_barrierExperimental
  A barrier for only the threads within the current wavefront.
wave_idExperimental
  Get the index of the current wavefront in the workgroup.
wave_reduce_addExperimental
  Performs an arithmetic add reduction on the values provided by each lane in the wavefront.
wave_reduce_andExperimental
  Performs a logical and reduction on the unsigned values provided by each lane in the wavefront.
wave_reduce_maxExperimental
  Performs an arithmetic max reduction on the signed values provided by each lane in the wavefront.
wave_reduce_minExperimental
  Performs an arithmetic min reduction on the signed values provided by each lane in the wavefront.
wave_reduce_orExperimental
  Performs a logical or reduction on the unsigned values provided by each lane in the wavefront.
wave_reduce_umaxExperimental
  Performs an arithmetic max reduction on the unsigned values provided by each lane in the wavefront.
wave_reduce_uminExperimental
  Performs an arithmetic min reduction on the unsigned values provided by each lane in the wavefront.
wave_reduce_xorExperimental
  Performs a logical xor reduction on the unsigned values provided by each lane in the wavefront.
wavefrontsizeExperimental
  Returns the number of threads in a wavefront.
workgroup_id_xExperimental
  Returns the x coordinate of the workgroup index within the dispatch.
workgroup_id_yExperimental
  Returns the y coordinate of the workgroup index within the dispatch.
workgroup_id_zExperimental
  Returns the z coordinate of the workgroup index within the dispatch.
workitem_id_xExperimental
  Returns the x coordinate of the workitem index within the workgroup.
workitem_id_yExperimental
  Returns the y coordinate of the workitem index within the workgroup.
workitem_id_zExperimental
  Returns the z coordinate of the workitem index within the workgroup.
writelane_u32⚠Experimental
  Return `value` for the lane at index `lane` in the wavefront. Return `default` for all other lanes.
writelane_u64⚠Experimental
  Return `value` for the lane at index `lane` in the wavefront. Return `default` for all other lanes.