commit b62cdb89e82ac5be33de383c528f2c31351f8573
author Kirill Okhotnikov <okir@google.com> Thu Jul 28 15:25:56 2022 +0200
committer Copybara-Service <copybara-worker@google.com> Mon Aug 01 13:45:56 2022 -0700
tree 3afbe48537a1ce7fb73421a3bcde2b022960c6b6
parent 47cfbc4ca6628b540bd41c1d53d8748915034997

[libc][math] Added tanhf function.

Correct rounding function. Performance ~2x faster than glibc analog.

Performance (llvm 12 intel):
```
CORE_MATH_PERF_MODE=rdtsc PERF_ARGS='' ./perf.sh tanhf
GNU libc version: 2.31
GNU libc release: stable
13.279
37.492
18.145
CORE_MATH_PERF_MODE=rdtsc PERF_ARGS='--latency' ./perf.sh tanhf
GNU libc version: 2.31
GNU libc release: stable
40.658
109.582
66.568
```

Differential Revision: https://reviews.llvm.org/D130780

GitOrigin-RevId: 5ef987c9852c07c6644b0b77fdb6c7102bc790f1