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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 /sysdeps/ia64/memchr.S | |
| parent | fabe43aba8fb46614eb2a74b2916bfbbf8fec10e (diff) | |
| download | glibc-65a1148bdd57d02fff9b0b5a2cc2627a5dfd6445.zip glibc-65a1148bdd57d02fff9b0b5a2cc2627a5dfd6445.tar.gz glibc-65a1148bdd57d02fff9b0b5a2cc2627a5dfd6445.tar.bz2 | |
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.
Diffstat (limited to 'sysdeps/ia64/memchr.S')
| -rw-r--r-- | sysdeps/ia64/memchr.S | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sysdeps/ia64/memchr.S b/sysdeps/ia64/memchr.S index cd062b2..e721e17 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 |