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, 115 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/alpha/alphaev67/stpncpy.S b/REORG.TODO/sysdeps/alpha/alphaev67/stpncpy.S
new file mode 100644
index 0000000000..1efc86cdb2
--- /dev/null
+++ b/REORG.TODO/sysdeps/alpha/alphaev67/stpncpy.S
@@ -0,0 +1,115 @@
+/* Copyright (C) 2000-2017 Free Software Foundation, Inc.
+   Contributed by Richard Henderson (rth@redhat.com)
+   This file is part of the GNU C Library.
+
+   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/>.  */
+
+/* Copy no more than N bytes from SRC to DEST, returning the address of
+   the terminating '\0' in DEST.  */
+
+#include <sysdep.h>
+
+	.arch ev6
+	.set noat
+	.set noreorder
+	.text
+
+ENTRY(__stpncpy)
+	ldgp	gp, 0(pv)
+#ifdef PROF
+	lda	AT, _mcount
+	jsr	AT, (AT), _mcount
+#endif
+	.prologue 1
+
+	mov	a0, v0
+	beq	a2, $zerocount
+
+	.align 4
+	nop
+	nop
+	jsr	t9, __stxncpy	# do the work of the copy
+
+	cttz	t8, t4
+	zapnot	t0, t8, t5
+	andnot	a0, 7, a0
+	bne	a2, $multiword	# do we have full words left?
+
+	subq	t8, 1, t2
+	subq	t10, 1, t3
+	cmpult	zero, t5, t5
+	addq	a0, t4, v0
+
+	or	t2, t8, t2
+	or	t3, t10, t3
+	addq	v0, t5, v0
+	andnot	t3, t2, t3
+
+	zap	t0, t3, t0
+	nop
+	stq	t0, 0(a0)
+	ret
+
+$multiword:
+	subq	t8, 1, t7	# clear the final bits in the prev word
+	cmpult	zero, t5, t5
+	or	t7, t8, t7
+	zapnot	t0, t7, t0
+
+	subq	a2, 1, a2
+	stq	t0, 0(a0)
+	addq	a0, 8, a1
+	beq	a2, 1f		# loop over full words remaining
+
+	nop
+	nop
+	nop
+	blbc	a2, 0f
+
+	stq	zero, 0(a1)
+	subq	a2, 1, a2
+	addq	a1, 8, a1
+	beq	a2, 1f
+
+0:	stq	zero, 0(a1)
+	subq	a2, 2, a2
+	nop
+	nop
+
+	stq	zero, 8(a1)
+	addq	a1, 16, a1
+	nop
+	bne	a2, 0b
+
+1:	ldq	t0, 0(a1)	# clear the leading bits in the final word
+	subq	t10, 1, t7
+	addq	a0, t4, v0
+	nop
+
+	or	t7, t10, t7
+	addq	v0, t5, v0
+	zap	t0, t7, t0
+	stq	t0, 0(a1)
+
+$zerocount:
+	nop
+	nop
+	nop
+	ret
+
+	END(__stpncpy)
+
+libc_hidden_def (__stpncpy)
+weak_alias (__stpncpy, stpncpy)