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author | Alan Modra <amodra@gmail.com> | 2013-08-17 18:47:59 +0930 |
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committer | Alan Modra <amodra@gmail.com> | 2013-10-04 10:41:35 +0930 |
commit | 3be87c77d24c4456ccca4034363b6d1814cd0c84 (patch) | |
tree | c81589a21d74b94d5ae20235bc6d81715eca858c /sysdeps/powerpc/powerpc32/power7/memset.S | |
parent | 759cfef3ac4c07dba1ece0bbc1207e099348816d (diff) | |
download | glibc-3be87c77d24c4456ccca4034363b6d1814cd0c84.tar.gz glibc-3be87c77d24c4456ccca4034363b6d1814cd0c84.tar.xz glibc-3be87c77d24c4456ccca4034363b6d1814cd0c84.zip |
PowerPC LE memset
http://sourceware.org/ml/libc-alpha/2013-08/msg00104.html One of the things I noticed when looking at power7 timing is that rlwimi is cracked and the two resulting insns have a register dependency. That makes it a little slower than the equivalent rldimi. * sysdeps/powerpc/powerpc64/memset.S: Replace rlwimi with insrdi. Formatting. * sysdeps/powerpc/powerpc64/power4/memset.S: Likewise. * sysdeps/powerpc/powerpc64/power6/memset.S: Likewise. * sysdeps/powerpc/powerpc64/power7/memset.S: Likewise. * sysdeps/powerpc/powerpc32/power4/memset.S: Likewise. * sysdeps/powerpc/powerpc32/power6/memset.S: Likewise. * sysdeps/powerpc/powerpc32/power7/memset.S: Likewise.
Diffstat (limited to 'sysdeps/powerpc/powerpc32/power7/memset.S')
-rw-r--r-- | sysdeps/powerpc/powerpc32/power7/memset.S | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sysdeps/powerpc/powerpc32/power7/memset.S b/sysdeps/powerpc/powerpc32/power7/memset.S index 360ea717f4..aadda2558f 100644 --- a/sysdeps/powerpc/powerpc32/power7/memset.S +++ b/sysdeps/powerpc/powerpc32/power7/memset.S @@ -35,8 +35,8 @@ L(_memset): cfi_offset(31,-8) /* Replicate byte to word. */ - rlwimi 4,4,8,16,23 - rlwimi 4,4,16,0,15 + insrdi 4,4,8,48 + insrdi 4,4,16,32 ble cr6,L(small) /* If length <= 8, use short copy code. */ |