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Add workgroup size and ID builtins#1295

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dj2 merged 2 commits intomainfrom
kvark-workgroup
Jan 20, 2021
Merged

Add workgroup size and ID builtins#1295
dj2 merged 2 commits intomainfrom
kvark-workgroup

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@kvark kvark commented Dec 10, 2020

Fixes #750

builtin SPIR-V HLSL Metal GLSL
workgroup_id WorkgroupId SV_GroupID threadgroup_position_in_grid gl_WorkGroupID
workgroup_size WorkgroupSize ??? dispatch_threads_per_threadgroup gl_WorkGroupSize

The lack of workgroup_size in HLSL is a bit of a concern, but since we have to basically insert the same value in the numgroups declaration anyway:

[numthreads(4,5,6)
void Foo () {.. }

... we should be able to do the same for workgroup_size builtin

@kvark kvark requested review from dj2 and dneto0 December 10, 2020 05:08
@kvark kvark mentioned this pull request Dec 10, 2020
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@Kangz Kangz added the wgsl WebGPU Shading Language Issues label Dec 11, 2020
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kvark commented Jan 19, 2021

Do we have to wait another week, or can we just get this in?

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dj2 commented Jan 20, 2021

We'd previously said in the group that this was coming back, so I think we can merge this now.

@dj2 dj2 merged commit 7e1d43d into main Jan 20, 2021
@kvark kvark deleted the kvark-workgroup branch January 20, 2021 14:22
ben-clayton pushed a commit to ben-clayton/gpuweb that referenced this pull request Sep 6, 2022
@dj2
wgsl: Stub synchronization builtin functions. (gpuweb#1426)
5d6c163 
This PR adds unimplemented stubs for the synchronization builtin functions.

 * `storageBarrier`
 * `workgroupBarrier`

Issue gpuweb#1249, gpuweb#1295
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@dj2 dj2 dj2 approved these changes

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Workgroup Size builtin decoration restrictions.

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