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| author | Shawn Landden <shawn@git.icu> | 2019-07-04 17:56:46 -0400 |
|---|---|---|
| committer | Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com> | 2020-02-19 17:29:23 -0300 |
| commit | 4068846e1e364b2441b93cf3d731a6599596726a (patch) | |
| tree | 2b92d418d2f8db7a81a63029c424e1deffed4fb6 /resolv/tst-resolv-basic.c | |
| parent | d91313ed6fb18acfb4f7b0399fd18e87f5c00221 (diff) | |
| download | glibc-4068846e1e364b2441b93cf3d731a6599596726a.zip glibc-4068846e1e364b2441b93cf3d731a6599596726a.tar.gz glibc-4068846e1e364b2441b93cf3d731a6599596726a.tar.bz2 | |
PPC64: Add libmvec SIMD single-precision power function [BZ #24210]
Based off the ./sysdeps/ieee754/flt-32/powf.c implementation,
and thus provides identical results.
Unlike other libmvec functions, this sets the underflow and overflow bits.
The caller can check these flags, and possibly re-run the calculations with
scalar powf to figure out what is causing the overflow or underflow.
I may have not normalized the data for benchmarking this properly,
but operating only on floats between 0.5 and 1 I get the following:
Running 20 times over 32MiB
vector: mean 307.659767 (sd 0.203217)
scalar: mean 221.837088 (sd 0.032256)
And with random data there is a decrease in performance:
vector: mean 265.366371 (sd 0.000626)
scalar: mean 279.598078 (sd 0.025592)
Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
Diffstat (limited to 'resolv/tst-resolv-basic.c')
0 files changed, 0 insertions, 0 deletions