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Properly recover from shorter read.

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H.J. Lu 2009-11-20 08:30:20 -08:00 committed by Ulrich Drepper
parent df1934daa7
commit 6622141795
2 changed files with 17 additions and 3 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2009-11-18 H.J. Lu <hongjiu.lu@intel.com>
[BZ #10162]
* sysdeps/ia64/memchr.S: Don't use a simple loop on data shorter
than software pipeline. Properly recover from shorter read.
2009-11-19 Ulrich Drepper <drepper@redhat.com>
[BZ #10958]

14
sysdeps/ia64/memchr.S
View File

@ -71,8 +71,7 @@ ENTRY(__memchr)
cmp.ne p7, p0 = r0, r0 // clear p7
extr.u chr = in1, 0, 8 // chr = (unsigned char) in1
mov len = in2
// use a simple loop on data shorter than software pipeline
cmp.gtu p6, p0 = ((MEMLAT + 1) * 8), in2
cmp.gtu p6, p0 = 16, in2 // use a simple loop for short
(p6) br.cond.spnt .srchfew ;; // searches
sub loopcnt = 8, tmp // loopcnt = 8 - tmp
cmp.eq p6, p0 = tmp, r0
@ -127,7 +126,16 @@ ENTRY(__memchr)
br.ret.sptk.many b0
.recovery:
adds ret0 = -((MEMLAT + 1) * 8), ret0;;
#if MEMLAT != 6
# error "MEMLAT must be 6!"
#endif
(p[MEMLAT-6]) add ret0 = -8, ret0;;
(p[MEMLAT-5]) add ret0 = -8, ret0;;
(p[MEMLAT-4]) add ret0 = -8, ret0;;
(p[MEMLAT-3]) add ret0 = -8, ret0;;
(p[MEMLAT-2]) add ret0 = -8, ret0;;
(p[MEMLAT-1]) add ret0 = -8, ret0;;
(p[MEMLAT]) add ret0 = -8, ret0;;
(p[MEMLAT+1]) add ret0 = -8, ret0;;
(p[MEMLAT+2]) add ret0 = -8, ret0;;
.l4: