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| author | H.J. Lu <hongjiu.lu@intel.com> | 2009-11-14 19:20:19 -0800 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2009-11-14 19:20:19 -0800 |
| commit | 65a1148bdd57d02fff9b0b5a2cc2627a5dfd6445 (patch) | |
| tree | e9378b9942425e73ab78dfd08ee7415fa3faf795 | |
| parent | fabe43aba8fb46614eb2a74b2916bfbbf8fec10e (diff) | |
| download | glibc-65a1148bdd57d02fff9b0b5a2cc2627a5dfd6445.tar.gz glibc-65a1148bdd57d02fff9b0b5a2cc2627a5dfd6445.tar.xz glibc-65a1148bdd57d02fff9b0b5a2cc2627a5dfd6445.zip | |
Use a simple loop on data shorter than software pipeline.
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.
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | sysdeps/ia64/memchr.S | 3 |
2 files changed, 8 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog index a3c626c2aa..c3918b74c1 100644 --- a/ChangeLog +++ b/ChangeLog @@ -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. diff --git a/sysdeps/ia64/memchr.S b/sysdeps/ia64/memchr.S index cd062b2dd5..e721e1714f 100644 --- a/sysdeps/ia64/memchr.S +++ b/sysdeps/ia64/memchr.S @@ -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 |