[clang] [compiler-rt] [llvm] [SystemZ] Add support for half (fp16) (PR #109164)

[Jonas Paulsson via llvm-commits]

JonPsson1 wrote:

Thanks to @boomanaiden154 for pointing out that I need to pass -DCOMPILER_RT_BUILD_BUILTINS=ON to cmake - the tests now builds and runs.

The test for half->double conversions added, with the 64-bit hex values taken from the compiler-rt conversion function results (should be correct, right :). Wanted to use the makeXXX16() functions as much as possible, but not sure what to pass to makeQNaN16(uint16_t rand), so left that as it was, which also should be fine, I suppose.


https://github.com/llvm/llvm-project/pull/109164