[llvm] [NVPTX] Add support for atomic add for f16 type (PR #84295)

[Artem Belevich via llvm-commits]

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@@ -0,0 +1,28 @@
+; RUN: llc < %s -march=nvptx -mcpu=sm_70 -mattr=+ptx63 | FileCheck %s
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Artem-B wrote:

For this test it might be convenient to autogenerate the checks with llvm/utils/update_test_checks.py

https://github.com/llvm/llvm-project/pull/84295