[PATCH] D105507: [AMDGPU] Add gfx10 assembler directive to specify shared VGPR count

[Tony Tye via Phabricator via llvm-commits]

t-tye added inline comments.


================
Comment at: llvm/docs/AMDGPUUsage.rst:4285-4287
+     3:0     4 bits  SHARED_VGPR_COUNT               Number of shared VGPR blocks for wavefront size 64. Granularity of 8.
+                                                     Value 0-15, representing 0-120 VGPRs.
+                                                     compute_pgm_rsrc1.vgprs + shared_vgpr_count*2 cannot exceed 63.
----------------
Suggest reword to:

```
Number of shared VGPR blocks for wavefront size 64 when executing in subvector mode. For wavefront size 64 the value is 0-15, representing 0-120 VGPRs (granularity of 8), such that (compute_pgm_rsrc1.vgprs +1)*4 + shared_vgpr_count*8 does not exceed 256. For wavefront size 32 must be 0.
```


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D105507/new/

https://reviews.llvm.org/D105507