| Bug ID | 103393 |
|---|---|
| Summary | glDispatchComputeGroupSizeARB : gl_GlobalInvocationID != gl_WorkGroupID.x * gl_LocalGroupSizeARB.x + gl_LocalInvocationID.x |
| Product | Mesa |
| Version | 17.2 |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | Drivers/Gallium/radeonsi |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | stephane.chevigny@polymtl.ca |
| QA Contact | dri-devel@lists.freedesktop.org |
Created attachment 134977 [details] Difference between the result of gl_GlobalInvocationID and gl_WorkGroupID.x * gl_LocalGroupSizeARB.x + gl_LocalInvocationID.x; The spec for ARB_compute_variable_group_size in this file https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_compute_variable_group_size.txt state that gl_GlobalInvocationID = gl_WorkGroupID * gl_LocalGroupSizeARB + gl_LocalInvocationID; but on my computer, arch linux with Radeon RX 580 Series (AMD POLARIS10 / DRM 3.18.0 / 4.13. 7-1-ARCH, LLVM 5.0.0) : mesa version 17.2.2, gl_GlobalInvocationID = gl_LocalInvocationID ; only. If I replace uint i = gl_GlobalInvocation.x with uint i = gl_WorkGroupID.x * gl_LocalGroupSizeARB.x + gl_LocalInvocationID.x the output of the compute shader work as expected.
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