[clang] [llvm] [HLSL] Implement the f16tof32() intrinsic (PR #165860)

[Farzon Lotfi via llvm-commits]

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@@ -3516,6 +3516,10 @@ bool SPIRVInstructionSelector::selectIntrinsic(Register ResVReg,
   case Intrinsic::spv_resource_nonuniformindex: {
     return selectResourceNonUniformIndex(ResVReg, ResType, I);
   }
+  case Intrinsic::spv_unpackhalf2x16: {
+    return selectExtInst(ResVReg, ResType, I, GL::UnpackHalf2x16);
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farzonl wrote:

@tcorringham I think you forgot this.

https://github.com/llvm/llvm-project/pull/165860