S390: Use mvcle for copies > 1MB on 32bit with default memcpy variant.

If more than 255 bytes should be copied, the algorithm jumps away.
Before this patch, it jumps to the mvc-loop (.L_G5_12).
Now it jumps first to the "> 1MB" check, which jumps away to
__memcpy_mvcle. Otherwise, the mvc-loop (.L_G5_12) copies the bytes.

ChangeLog:

	* sysdeps/s390/s390-32/memcpy.S (memcpy):
	Jump to 1MB check before executing mvc-loop.

1 files changed, 5 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 2b51267194..d2b34a8478 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2016-05-24  Stefan Liebler  <stli@linux.vnet.ibm.com>
+
+	* sysdeps/s390/s390-32/memcpy.S (memcpy):
+	Jump to 1MB check before executing mvc-loop.
+
 2016-05-24  Florian Weimer  <fweimer@redhat.com>
 
 	[BZ #6527]