[libc-commits] [libc] [libc][math] Switch log1pf to use the same log_eval from inverse hyperbolic functions. (PR #188388)

[via libc-commits]

zimmermann6 wrote:

I get an error with rounding down:
```
immerma at croissant:~/svn/core-math$ EXTRA_CFLAGS=-DCORE_MATH_NOCHECK_UNDERFLOW CORE_MATH_CHECK_STD=true LIBM=$L ./check.sh log1pf
Running exhaustive check in --rndn mode...
all ok
Running exhaustive check in --rndz mode...
all ok
Running exhaustive check in --rndu mode...
all ok
Running exhaustive check in --rndd mode...
FAIL x=0x0p+0 ref=0x0p+0 y=-0x0p+0
```

https://github.com/llvm/llvm-project/pull/188388