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| author | Wilco Dijkstra <wdijkstr@arm.com> | 2018-08-23 12:38:16 +0100 |
|---|---|---|
| committer | Wilco Dijkstra <wdijkstr@arm.com> | 2018-08-23 12:38:16 +0100 |
| commit | 900fb446eb8172c54cdaed85107bc783ee50673a (patch) | |
| tree | 80ecbb5c9245698a5b5c70b1070f621e77834dec /ChangeLog | |
| parent | 561b0bec4448f0302cb4915bf67c919bde4a1c57 (diff) | |
| download | glibc-900fb446eb8172c54cdaed85107bc783ee50673a.tar.gz glibc-900fb446eb8172c54cdaed85107bc783ee50673a.tar.xz glibc-900fb446eb8172c54cdaed85107bc783ee50673a.zip | |
Speedup tanf range reduction
Speedup tanf range reduction by using the new sincosf range reduction algorithm. Overall code quality is improved due to inlining, so there is a speedup even if no range reduction is required. tanf throughput gains on Cortex-A72: * |x| < M_PI_4 : 1.1x * |x| < M_PI_2 : 1.2x * |x| < 2 * M_PI: 1.5x * |x| < 120.0 : 1.6x * |x| < Inf : 12.1x * sysdeps/ieee754/flt-32/s_tanf.c (__tanf): Use fast range reduction.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index a22301f323..2c902f2b98 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,7 @@ +2018-08-23 Wilco Dijkstra <wdijkstr@arm.com> + + * sysdeps/ieee754/flt-32/s_tanf.c (__tanf): Use fast range reduction. + 2018-08-22 DJ Delorie <dj@redhat.com> * Makefile (testroot.pristine): New rules to initialize the |