[llvm] AMDGPU: Add codegen for atomicrmw operations usub_cond and usub_sat (PR #141068)

[via llvm-commits]

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@@ -0,0 +1,487 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -global-isel -mtriple=amdgcn-amd-amdhsa -mcpu=gfx1030 < %s | FileCheck %s -check-prefix=GFX10-GISEL
+; RUN: llc -global-isel -mtriple=amdgcn-amd-amdhsa -mcpu=gfx1031 < %s | FileCheck %s -check-prefix=GFX10-GISEL
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anjenner wrote:

I have removed the 1031 lines. Which older subtargets should be tested? I looked at the instruction set manuals and it seems that csub was first introduced in GFX10.3.

https://github.com/llvm/llvm-project/pull/141068