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| author | Stefan Liebler <stli@linux.vnet.ibm.com> | 2016-05-24 10:39:13 +0200 |
|---|---|---|
| committer | Stefan Liebler <stli@linux.vnet.ibm.com> | 2016-05-24 10:39:13 +0200 |
| commit | 04bb21ac93e90d7696bcaf8febe2b2dd2d83585a (patch) | |
| tree | 5e4d119652c416d213685c8e1295855794bab80f /ChangeLog | |
| parent | dea39b13e2958a7f0e75b5594a06d97d61cc439f (diff) | |
| download | glibc-04bb21ac93e90d7696bcaf8febe2b2dd2d83585a.tar.gz glibc-04bb21ac93e90d7696bcaf8febe2b2dd2d83585a.tar.xz glibc-04bb21ac93e90d7696bcaf8febe2b2dd2d83585a.zip | |
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.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 5 |
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] |