[libc-commits] [PATCH] D129005: [libc][math] Improved performance of exp2f function.

[Paul Zimmermann via Phabricator via libc-commits]

zimmermann6 accepted this revision.
zimmermann6 added a comment.
This revision is now accepted and ready to land.

I confirm the reciprocal throughput decreased from 18 to 10 cycles (on the same machine as above):

  zimmerma at biscotte:~/svn/core-math$ LIBM=/localdisk/zimmerma/llvm-project/build/projects/libc/lib/libllvmlibc.a CORE_MATH_PERF_MODE=rdtsc ./perf.sh exp2f
  GNU libc version: 2.33
  GNU libc release: release
  9.728
  7.085
  10.040
  zimmerma at biscotte:~/svn/core-math$ LIBM=/localdisk/zimmerma/llvm-project/build/projects/libc/lib/libllvmlibc.a CORE_MATH_PERF_MODE=rdtsc PERF_ARGS=--latency ./perf.sh exp2f
  GNU libc version: 2.33
  GNU libc release: release
  37.106
  29.520
  48.515

Good work Kirill!


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D129005/new/

https://reviews.llvm.org/D129005