r3519 - glibc-package/branches/eglibc-2.10/debian/patches/ia64
Author: aurel32
Date: 2009-05-21 21:37:06 +0000 (Thu, 21 May 2009)
New Revision: 3519
Added:
glibc-package/branches/eglibc-2.10/debian/patches/ia64/submitted-memchr.diff
Log:
* Add debian/patches/ia64/submitted-memchr.diff to fix memchr() when
crossing page boundaries on ia64.
Added: glibc-package/branches/eglibc-2.10/debian/patches/ia64/submitted-memchr.diff
===================================================================
--- glibc-package/branches/eglibc-2.10/debian/patches/ia64/submitted-memchr.diff (rev 0)
+++ glibc-package/branches/eglibc-2.10/debian/patches/ia64/submitted-memchr.diff 2009-05-21 21:37:06 UTC (rev 3519)
@@ -0,0 +1,38 @@
+2009-05-21 H.J. Lu <hongjiu.lu@intel.com>
+
+ PR libc/10162
+ * sysdeps/ia64/memchr.S: Use speculative load.
+
+--- a/sysdeps/ia64/memchr.S
++++ b/sysdeps/ia64/memchr.S
+@@ -96,7 +96,8 @@ ENTRY(__memchr)
+ mov pr.rot = 1 << 16 ;;
+ .l2:
+ (p[0]) mov addr[0] = ret0
+-(p[0]) ld8 value[0] = [ret0], 8
++(p[0]) ld8.s value[0] = [ret0], 8 // speculative load
++(p[MEMLAT]) chk.s value[MEMLAT], .recovery // check and recovery
+ (p[MEMLAT]) xor aux[0] = value[MEMLAT], chrx8
+ (p[MEMLAT+1]) czx1.r poschr[0] = aux[1]
+ (p[MEMLAT+2]) cmp.ne p7, p0 = 8, poschr[1]
+@@ -124,6 +125,20 @@ ENTRY(__memchr)
+ mov ar.lc = saved_lc
+ br.ret.sptk.many b0
+
++.recovery:
++ adds ret0 = -((MEMLAT + 1) * 8), ret0;;
++(p[MEMLAT+1]) add ret0 = -8, ret0;;
++(p[MEMLAT+2]) add ret0 = -8, ret0;;
++.l4:
++ mov addr[MEMLAT+2] = ret0
++ ld8 tmp = [ret0];; // load the first unchecked 8byte
++ xor aux[1] = tmp, chrx8;;
++ czx1.r poschr[1] = aux[1];;
++ cmp.ne p7, p0 = 8, poschr[1]
++(p7) br.cond.spnt .foundit;;
++ adds ret0 = 8, ret0 // load the next unchecked 8byte
++ br.sptk .l4;;
++
+ END(__memchr)
+
+ weak_alias (__memchr, memchr)
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