From: H.J. Lu Date: Sun, 15 Nov 2009 03:20:19 +0000 (-0800) Subject: Use a simple loop on data shorter than software pipeline. X-Git-Tag: fedora/glibc-2.11.90-2~1^2~25 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=65a1148bdd57d02fff9b0b5a2cc2627a5dfd6445;p=thirdparty%2Fglibc.git 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. --- diff --git a/ChangeLog b/ChangeLog index a3c626c2aa9..c3918b74c14 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,9 @@ +2009-11-09 H.J. Lu + + [BZ #10162] + * sysdeps/ia64/memchr.S: Use a simple loop on data shorter than + software pipeline. + 2009-11-09 Mike Frysinger * sysdeps/unix/sysv/linux/i386/fallocate.c: Include errno.h. diff --git a/sysdeps/ia64/memchr.S b/sysdeps/ia64/memchr.S index cd062b2dd52..e721e1714f3 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