Prepare for radical source tree reorganization.zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 61 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/ia64/strncmp.S b/REORG.TODO/sysdeps/ia64/strncmp.S
new file mode 100644
index 0000000000..1b7f8568dd
--- /dev/null
+++ b/REORG.TODO/sysdeps/ia64/strncmp.S
@@ -0,0 +1,61 @@
+/* Optimized version of the standard strncmp() function.
+   This file is part of the GNU C Library.
+   Copyright (C) 2000-2017 Free Software Foundation, Inc.
+   Contributed by Dan Pop <Dan.Pop@cern.ch>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* Return: the result of the comparison
+
+   Inputs:
+        in0:    s1
+        in1:    s2
+        in2:    n
+
+   Unlike memcmp(), this function is optimized for mismatches within the
+   first few characters.  */
+
+#include <sysdep.h>
+#undef ret
+
+#define s1		in0
+#define s2		in1
+#define n		in2
+
+#define val1		r15
+#define val2		r16
+
+
+ENTRY(strncmp)
+	alloc	r2 = ar.pfs, 3, 0, 0, 0
+	mov	ret0 = r0
+	cmp.eq  p6, p0 = r0, r0		// set p6
+	cmp.eq	p7, p0 = n, r0		// return immediately if n == 0
+(p7)	br.cond.spnt .restore_and_exit ;;
+.loop:
+	ld1	val1 = [s1], 1
+	ld1	val2 = [s2], 1
+	adds	n = -1, n		// n--
+	;;
+	cmp.ne.and p6, p0 = val1, r0
+	cmp.ne.and p6, p0 = val2, r0
+	cmp.ne.and p6, p0 = n, r0
+	cmp.eq.and p6, p0 = val1, val2
+(p6)	br.cond.sptk .loop
+	sub	ret0 = val1, val2
+.restore_and_exit:
+	br.ret.sptk.many b0
+END(strncmp)
+libc_hidden_builtin_def (strncmp)