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authorH.J. Lu <hongjiu.lu@intel.com>2009-11-14 19:20:19 -0800
committerUlrich Drepper <drepper@redhat.com>2009-11-14 19:20:19 -0800
commit65a1148bdd57d02fff9b0b5a2cc2627a5dfd6445 (patch)
treee9378b9942425e73ab78dfd08ee7415fa3faf795 /sysdeps/ia64/memchr.S
parentfabe43aba8fb46614eb2a74b2916bfbbf8fec10e (diff)
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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.S3
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