[clang] [llvm] [NVPTX] Add ex2.approx bf16 support and cleanup intrinsic definition (PR #165446)

[Alex MacLean via llvm-commits]

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@@ -1049,12 +1060,23 @@ Value *CodeGenFunction::EmitNVPTXBuiltinExpr(unsigned BuiltinID,
   case NVPTX::BI__nvvm_fabs_d:
     return Builder.CreateUnaryIntrinsic(Intrinsic::fabs,
                                         EmitScalarExpr(E->getArg(0)));
+  case NVPTX::BI__nvvm_ex2_approx_d:
+  case NVPTX::BI__nvvm_ex2_approx_f:
+    return Builder.CreateUnaryIntrinsic(Intrinsic::nvvm_ex2_approx,
+                                        EmitScalarExpr(E->getArg(0)));
+  case NVPTX::BI__nvvm_ex2_approx_ftz_f:
+    return Builder.CreateUnaryIntrinsic(Intrinsic::nvvm_ex2_approx_ftz,
+                                        EmitScalarExpr(E->getArg(0)));
   case NVPTX::BI__nvvm_ldg_h:
   case NVPTX::BI__nvvm_ldg_h2:
-    return MakeHalfType(Intrinsic::not_intrinsic, BuiltinID, E, *this);
+    if (!EnsureNativeHalfSupport(BuiltinID, E, *this))
+      return nullptr;
+    return MakeLdg(*this, E);
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AlexMaclean wrote:

Nice

https://github.com/llvm/llvm-project/pull/165446