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, 106 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/alpha/stpncpy.S b/REORG.TODO/sysdeps/alpha/stpncpy.S
new file mode 100644
index 0000000000..62f6a8f2fd
--- /dev/null
+++ b/REORG.TODO/sysdeps/alpha/stpncpy.S
@@ -0,0 +1,106 @@
+/* Copyright (C) 1996-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Richard Henderson (rth@tamu.edu)
+
+   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 COUNT bytes of the null-terminated string from
+   SRC to DST.  If SRC does not cover all of COUNT, the balance is
+   zeroed.  Return the address of the terminating null in DEST, if
+   any, else DEST + COUNT.  */
+
+#include <sysdep.h>
+
+	.set noat
+	.set noreorder
+
+	.text
+
+ENTRY(__stpncpy)
+	ldgp	gp, 0(pv)
+#ifdef PROF
+	lda	AT, _mcount
+	jsr	AT, (AT), _mcount
+#endif
+	.prologue 1
+
+	beq	a2, $zerocount
+	jsr	t9, __stxncpy	# do the work of the copy
+
+	and	t8, 0xf0, t3	# binary search for byte offset of the
+	and	t8, 0xcc, t2	# last byte written.
+	and	t8, 0xaa, t1
+	andnot	a0, 7, v0
+	cmovne	t3, 4, t3
+	cmovne	t2, 2, t2
+	cmovne	t1, 1, t1
+	addq	v0, t3, v0
+	addq	t1, t2, t1
+	addq	v0, t1, v0
+
+	bne	a2, $multiword	# do we have full words left?
+
+	.align 3
+	zapnot	t0, t8, t4	# e0    : was last byte a null?
+	subq	t8, 1, t2	# .. e1 :
+	addq	v0, 1, t5	# e0    :
+	subq	t10, 1, t3	# .. e1 :
+	or	t2, t8, t2	# e0    : clear the bits between the last
+	or	t3, t10, t3	# .. e1 : written byte and the last byte in
+	andnot	t3, t2, t3	# e0    : COUNT
+	cmovne	t4, t5, v0	# .. e1 : if last written wasnt null, inc v0
+	zap	t0, t3, t0	# e0    :
+	stq_u	t0, 0(a0)	# e1    :
+	ret			# .. e1 :
+
+	.align 3
+$multiword:
+	subq	t8, 1, t7	# e0    : clear the final bits in the prev
+	or	t7, t8, t7	# e1    : word
+	zapnot	t0, t7, t0	# e0    :
+	subq	a2, 1, a2	# .. e1 :
+	stq_u	t0, 0(a0)	# e0    :
+	addq	a0, 8, a0	# .. e1 :
+
+	beq	a2, 1f		# e1    :
+	blbc	a2, 0f		# e1    :
+
+	stq_u	zero, 0(a0)	# e0    : zero one word
+	subq	a2, 1, a2	# .. e1 :
+	addq	a0, 8, a0	# e0    :
+	beq	a2, 1f		# .. e1 :
+
+0:	stq_u	zero, 0(a0)	# e0    : zero two words
+	subq	a2, 2, a2	# .. e1 :
+	stq_u	zero, 8(a0)	# e0    :
+	addq	a0, 16, a0	# .. e1 :
+	bne	a2, 0b		# e1    :
+	unop
+
+1:	ldq_u	t0, 0(a0)	# e0    : clear the leading bits in the final
+	subq	t10, 1, t7	# .. e1 : word
+	or	t7, t10, t7	# e0    :
+	zap	t0, t7, t0	# e1 (stall)
+	stq_u	t0, 0(a0)	# e0    :
+	ret			# .. e1 :
+
+$zerocount:
+	mov	a0, v0
+	ret
+
+	END(__stpncpy)
+
+libc_hidden_def (__stpncpy)
+weak_alias (__stpncpy, stpncpy)