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Author SHA1 Message Date
Alexander Johnston
76f1949cfa
[HLSL] Implement the fwidth intrinsic for DXIL and SPIR-V target (#161378) 
Adds the fwidth intrinsic for HLSL.
The DXIL path only requires modification to the hlsl headers.
The SPIRV path implements the OpFwidth builtin in Clang and instruction
selection for the OpFwidth instruction in LLVM.
Also adds shader stage tests to the ddx_coarse and ddy_coarse
instructions used by fwidth.

Closes #99120

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Co-authored-by: Alexander Johnston <alexander.johnston@amd.com>
 2025-11-20 07:38:32 -05:00
Alexander Johnston
ed60cd2563
[HLSL] Implement ddx/ddy_coarse intrinsics (#164831) 
Closes https://github.com/llvm/llvm-project/issues/99097
Closes https://github.com/llvm/llvm-project/issues/99100

As ddx and ddy are near identical implementations I've combined them in
this PR. This aims to unblock
https://github.com/llvm/llvm-project/pull/161378

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Co-authored-by: Alexander Johnston <alexander.johnston@amd.com>
 2025-11-18 16:41:07 +01:00