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, 0 insertions, 139 deletions

diff --git a/sysdeps/aarch64/strchr.S b/sysdeps/aarch64/strchr.S
deleted file mode 100644
index c5bc79a8c3..0000000000
--- a/sysdeps/aarch64/strchr.S
+++ /dev/null
@@ -1,139 +0,0 @@
-/* strchr - find a character in a string
-
-   Copyright (C) 2014-2017 Free Software Foundation, Inc.
-
-   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/>.  */
-
-#include <sysdep.h>
-
-/* Assumptions:
- *
- * ARMv8-a, AArch64
- */
-
-/* Arguments and results.  */
-#define srcin		x0
-#define chrin		w1
-
-#define result		x0
-
-#define src		x2
-#define tmp1		x3
-#define wtmp2		w4
-#define tmp3		x5
-
-#define vrepchr		v0
-#define vdata1		v1
-#define vdata2		v2
-#define vhas_nul1	v3
-#define vhas_nul2	v4
-#define vhas_chr1	v5
-#define vhas_chr2	v6
-#define vrepmask_0	v7
-#define vrepmask_c	v16
-#define vend1		v17
-#define vend2		v18
-
-	/* Core algorithm.
-	   For each 32-byte hunk we calculate a 64-bit syndrome value, with
-	   two bits per byte (LSB is always in bits 0 and 1, for both big
-	   and little-endian systems).  Bit 0 is set iff the relevant byte
-	   matched the requested character.  Bit 1 is set iff the
-	   relevant byte matched the NUL end of string (we trigger off bit0
-	   for the special case of looking for NUL).  Since the bits
-	   in the syndrome reflect exactly the order in which things occur
-	   in the original string a count_trailing_zeros() operation will
-	   identify exactly which byte is causing the termination, and why.  */
-
-/* Locals and temporaries.  */
-
-ENTRY (strchr)
-	DELOUSE (0)
-	mov	wtmp2, #0x0401
-	movk	wtmp2, #0x4010, lsl #16
-	dup	vrepchr.16b, chrin
-	bic	src, srcin, #31
-	dup	vrepmask_c.4s, wtmp2
-	ands	tmp1, srcin, #31
-	add	vrepmask_0.4s, vrepmask_c.4s, vrepmask_c.4s // lsl #1
-	b.eq	L(loop)
-
-	/* Input string is not 32-byte aligned.  Rather than forcing
-	   the padding bytes to a safe value, we calculate the syndrome
-	   for all the bytes, but then mask off those bits of the
-	   syndrome that are related to the padding.  */
-	ld1	{vdata1.16b, vdata2.16b}, [src], #32
-	neg	tmp1, tmp1
-	cmeq	vhas_nul1.16b, vdata1.16b, #0
-	cmeq	vhas_chr1.16b, vdata1.16b, vrepchr.16b
-	cmeq	vhas_nul2.16b, vdata2.16b, #0
-	cmeq	vhas_chr2.16b, vdata2.16b, vrepchr.16b
-	and	vhas_nul1.16b, vhas_nul1.16b, vrepmask_0.16b
-	and	vhas_nul2.16b, vhas_nul2.16b, vrepmask_0.16b
-	and	vhas_chr1.16b, vhas_chr1.16b, vrepmask_c.16b
-	and	vhas_chr2.16b, vhas_chr2.16b, vrepmask_c.16b
-	orr	vend1.16b, vhas_nul1.16b, vhas_chr1.16b
-	orr	vend2.16b, vhas_nul2.16b, vhas_chr2.16b
-	lsl	tmp1, tmp1, #1
-	addp	vend1.16b, vend1.16b, vend2.16b		// 256->128
-	mov	tmp3, #~0
-	addp	vend1.16b, vend1.16b, vend2.16b		// 128->64
-	lsr	tmp1, tmp3, tmp1
-
-	mov	tmp3, vend1.2d[0]
-	bic	tmp1, tmp3, tmp1	// Mask padding bits.
-	cbnz	tmp1, L(tail)
-
-L(loop):
-	ld1	{vdata1.16b, vdata2.16b}, [src], #32
-	cmeq	vhas_nul1.16b, vdata1.16b, #0
-	cmeq	vhas_chr1.16b, vdata1.16b, vrepchr.16b
-	cmeq	vhas_nul2.16b, vdata2.16b, #0
-	cmeq	vhas_chr2.16b, vdata2.16b, vrepchr.16b
-	/* Use a fast check for the termination condition.  */
-	orr	vend1.16b, vhas_nul1.16b, vhas_chr1.16b
-	orr	vend2.16b, vhas_nul2.16b, vhas_chr2.16b
-	orr	vend1.16b, vend1.16b, vend2.16b
-	addp	vend1.2d, vend1.2d, vend1.2d
-	mov	tmp1, vend1.2d[0]
-	cbz	tmp1, L(loop)
-
-	/* Termination condition found.  Now need to establish exactly why
-	   we terminated.  */
-	and	vhas_nul1.16b, vhas_nul1.16b, vrepmask_0.16b
-	and	vhas_nul2.16b, vhas_nul2.16b, vrepmask_0.16b
-	and	vhas_chr1.16b, vhas_chr1.16b, vrepmask_c.16b
-	and	vhas_chr2.16b, vhas_chr2.16b, vrepmask_c.16b
-	orr	vend1.16b, vhas_nul1.16b, vhas_chr1.16b
-	orr	vend2.16b, vhas_nul2.16b, vhas_chr2.16b
-	addp	vend1.16b, vend1.16b, vend2.16b		// 256->128
-	addp	vend1.16b, vend1.16b, vend2.16b		// 128->64
-
-	mov	tmp1, vend1.2d[0]
-L(tail):
-	sub	src, src, #32
-	rbit	tmp1, tmp1
-	clz	tmp1, tmp1
-	/* Tmp1 is even if the target charager was found first.  Otherwise
-	   we've found the end of string and we weren't looking for NUL.  */
-	tst	tmp1, #1
-	add	result, src, tmp1, lsr #1
-	csel	result, result, xzr, eq
-	ret
-END (strchr)
-libc_hidden_builtin_def (strchr)
-weak_alias (strchr, index)