[libc-commits] [libc] [libc][math][c23] add entry points and tests for fsqrt (PR #99669)

[via libc-commits]

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@@ -739,6 +739,10 @@ def StdC : StandardSpec<"stdc"> {
 
           GuardedFunctionSpec<"f16mulf128", RetValSpec<Float16Type>, [ArgSpec<Float128Type>, ArgSpec<Float128Type>], "LIBC_TYPES_HAS_FLOAT16_AND_FLOAT128">,
 
+          FunctionSpec<"fsqrt", RetValSpec<FloatType>, [ArgSpec<DoubleType>]>,
+          FunctionSpec<"fsqrtl", RetValSpec<FloatType>, [ArgSpec<LongDoubleType>]>,
+	  GuardedFunctionSpec<"fsqrtf128", RetValSpec<FloatType>, [ArgSpec<Float128Type>], "LIBC_TYPES_HAS_FLOAT128">,
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overmighty wrote:

`fsqrtf128` should be an LLVM libc extension, so it should be moved to libc/spec/llvm_libc_ext.td. The C standard only defines these:

```c
float fsqrt(double x);
float fsqrtl(long double x);
_FloatM fMsqrtfN(_FloatN x); // M < N
```

https://github.com/llvm/llvm-project/pull/99669