[clang] [llvm] [HLSL] Implement dot2add intrinsic (PR #131237)

[Sumit Agarwal via llvm-commits]

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@@ -0,0 +1,8 @@
+; RUN: opt -S -dxil-op-lower -mtriple=dxil-pc-shadermodel6.3-compute %s | FileCheck %s
+
+define noundef float @dot2add_simple(<2 x half> noundef %a, <2 x half> noundef %b, float %c) {
+entry:
+; CHECK: call float @dx.op.dot2AddHalf(i32 162, float %c, half %0, half %1, half %2, half %3)
+  %ret = call float @llvm.dx.dot2add(<2 x half> %a, <2 x half> %b, float %c)
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sumitsays wrote:

Thank you @V-FEXrt for pointing the official documentation. My one cent is also towards not having half in the name as there is only 1 possible overload. At the same time, I am fine with either names.

https://github.com/llvm/llvm-project/pull/131237