| commit | b31bd11454fade731e5158b1aea40b133ae19926 | |
| author | Wilco Dijkstra <wdijkstr@arm.com> | |
| Thu, 2 Dec 2021 18:33:26 +0000 (2 18:33 +0000) | ||
| committer | Wilco Dijkstra <wdijkstr@arm.com> | |
| Thu, 2 Dec 2021 18:36:03 +0000 (2 18:36 +0000) | ||
| tree | d6d25ad11615c9f2c91a607f7d7a7cdc958bb5d7 | treesnapshot (tar.gz zip) |
| parent | b51eb35c572b015641f03e3682c303f7631279b7 | commitdiff |
AArch64: Improve A64FX memcpy
v2 is a complete rewrite of the A64FX memcpy. Performance is improved
by streamlining the code, aligning all large copies and using a single
unrolled loop for all sizes. The code size for memcpy and memmove goes
down from 1796 bytes to 868 bytes. Performance is better in all cases:
bench-memcpy-random is 2.3% faster overall, bench-memcpy-large is ~33%
faster for large sizes, bench-memcpy-walk is 25% faster for small sizes
and 20% for the largest sizes. The geomean of all tests in bench-memcpy
is 5.1% faster, and total time is reduced by 4%.
Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
v2 is a complete rewrite of the A64FX memcpy. Performance is improved
by streamlining the code, aligning all large copies and using a single
unrolled loop for all sizes. The code size for memcpy and memmove goes
down from 1796 bytes to 868 bytes. Performance is better in all cases:
bench-memcpy-random is 2.3% faster overall, bench-memcpy-large is ~33%
faster for large sizes, bench-memcpy-walk is 25% faster for small sizes
and 20% for the largest sizes. The geomean of all tests in bench-memcpy
is 5.1% faster, and total time is reduced by 4%.
Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
| sysdeps/aarch64/multiarch/memcpy_a64fx.S | diffblobblamehistory |