| commit | 5d55f9b05ecb85b7a543f641829479cfb081f380 | |
| author | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | |
| Fri, 20 Jun 2014 17:55:16 +0000 (20 12:55 -0500) | ||
| committer | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | |
| Thu, 28 Aug 2014 13:29:49 +0000 (28 09:29 -0400) | ||
| tree | be42c7f465781b8141e12f7bfa4a327b151f179b | treesnapshot (tar.gz zip) |
| parent | dde00e9914370ddd90c9bbc4f3f0e455efae4b47 | commitdiff |
PowerPC: optimized memmove for POWER7/PPC64
This patch adds an optimized memmove optimization for POWER7/powerpc64.
Basically the idea is to use the memcpy for POWER7 on non-overlapped
memory regions and a optimized backward memcpy for memory regions
that overlap (similar to the idea of string/memmove.c).
The backward memcpy algorithm used is similar the one use for memcpy for
POWER7, with adjustments done for alignment. The difference is memory
is always aligned to 16 bytes before using VSX/altivec instructions.
This patch adds an optimized memmove optimization for POWER7/powerpc64.
Basically the idea is to use the memcpy for POWER7 on non-overlapped
memory regions and a optimized backward memcpy for memory regions
that overlap (similar to the idea of string/memmove.c).
The backward memcpy algorithm used is similar the one use for memcpy for
POWER7, with adjustments done for alignment. The difference is memory
is always aligned to 16 bytes before using VSX/altivec instructions.
| ChangeLog | diffblobblamehistory | |
| string/bcopy.c | diffblobblamehistory | |
| sysdeps/powerpc/powerpc64/multiarch/Makefile | diffblobblamehistory | |
| sysdeps/powerpc/powerpc64/multiarch/bcopy-ppc64.c | [copied from string/bcopy.c with 77% similarity] | diffblobblamehistory |
| sysdeps/powerpc/powerpc64/multiarch/bcopy.c | [copied from string/bcopy.c with 65% similarity] | diffblobblamehistory |
| sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c | diffblobblamehistory | |
| sysdeps/powerpc/powerpc64/multiarch/memmove-power7.S | [copied from string/bcopy.c with 50% similarity] | diffblobblamehistory |
| sysdeps/powerpc/powerpc64/multiarch/memmove-ppc64.c | [copied from string/bcopy.c with 71% similarity] | diffblobblamehistory |
| sysdeps/powerpc/powerpc64/multiarch/memmove.c | [new file with mode: 0644] | blob |
| sysdeps/powerpc/powerpc64/power7/bcopy.c | [new file with mode: 0644] | blob |
| sysdeps/powerpc/powerpc64/power7/memmove.S | [new file with mode: 0644] | blob |