aarch64,falkor: Use vector registers for memmove

Vector registers perform much better for moves compared to pairs of
registers on falkor, so use them instead.  This results in a time
reduction of up to 50% (i.e. 2x improvement) for a lot of the smaller
sizes, i.e. up to 1K in memmove-walk.  Improvements for larger sizes are
smaller, at about 1%-2%.

	* sysdeps/aarch64/multiarch/memmove_falkor.S
	(__memcpy_falkor): Use vector registers.

1 files changed, 5 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 0c79b86a76..5d450c9f86 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2018-06-29  Siddhesh Poyarekar  <siddhesh@sourceware.org>
+
+	* sysdeps/aarch64/multiarch/memmove_falkor.S
+	(__memcpy_falkor): Use vector registers.
+
 2018-06-29  Martin Sebor  <msebor@redhat.com>
 
 	* manual/stdio.texi (Customizing Printf): Mention interaction