Commit Graph

4 Commits

Author SHA1 Message Date
Wilco Dijkstra
a8c5a2a952 This is an optimized memset for AArch64. Memset is split into 4 main cases:
small sets of up to 16 bytes, medium of 16..96 bytes which are fully unrolled.
Large memsets of more than 96 bytes align the destination and use an unrolled
loop processing 64 bytes per iteration.  Memsets of zero of more than 256 use
the dc zva instruction, and there are faster versions for the common ZVA sizes
64 or 128.  STP of Q registers is used to reduce codesize without loss of
performance.

The speedup on test-memset is 1% on Cortex-A57 and 8% on Cortex-A53.

	* sysdeps/aarch64/memset.S (__memset):
	Rewrite of optimized memset.
2016-05-12 16:44:53 +01:00
Joseph Myers
f7a9f785e5 Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
Joseph Myers
b168057aaa Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
Marcus Shawcroft
75eff3fe90 Relocate AArch64 from ports to libc.
This patch moves the AArch64 port to the main sysdeps hierarchy.  The
move is essentially:

  git mv ports/sysdeps/aarch64 sysdeps/aarch64
  git mv ports/sysdeps/unix/sysv/linux/aarch64 sysdeps/unix/sysv/linux/aarch64

The README is updated and I've updated ChangeLog.aarch64 along the
lines of the ARM move.  The AArch64 build has been tested to confirm
that there were no changes in objdump -dr output or the shared
objects.
2014-02-11 11:36:00 +00:00