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Use a simple loop on data shorter than software pipeline.

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When data is shorter than software pipeline, recovery may fail. This
patch avoids it by using a simple loop on data shorter than software
pipeline.
This commit is contained in:
H.J. Lu 2009-11-14 19:20:19 -08:00 committed by Ulrich Drepper
parent fabe43aba8
commit 65a1148bdd
2 changed files with 8 additions and 1 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2009-11-09 H.J. Lu <hongjiu.lu@intel.com>
[BZ #10162]
* sysdeps/ia64/memchr.S: Use a simple loop on data shorter than
software pipeline.
2009-11-09 Mike Frysinger <vapier@gentoo.org>
* sysdeps/unix/sysv/linux/i386/fallocate.c: Include errno.h.

3
sysdeps/ia64/memchr.S
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@ -71,7 +71,8 @@ ENTRY(__memchr)
cmp.ne p7, p0 = r0, r0 // clear p7
extr.u chr = in1, 0, 8 // chr = (unsigned char) in1
mov len = in2
cmp.gtu p6, p0 = 16, in2 // use a simple loop for short
// use a simple loop on data shorter than software pipeline
cmp.gtu p6, p0 = ((MEMLAT + 1) * 8), in2
(p6) br.cond.spnt .srchfew ;; // searches
sub loopcnt = 8, tmp // loopcnt = 8 - tmp
cmp.eq p6, p0 = tmp, r0