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, 260 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/sparc/sparc64/memchr.S b/REORG.TODO/sysdeps/sparc/sparc64/memchr.S
new file mode 100644
index 0000000000..e82075510b
--- /dev/null
+++ b/REORG.TODO/sysdeps/sparc/sparc64/memchr.S
@@ -0,0 +1,260 @@
+/* memchr (str, ch, n) -- Return pointer to first occurrence of CH in STR less
+   than N.
+   For SPARC v9.
+   Copyright (C) 1998-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jan Vondrak <jvon4518@ss1000.ms.mff.cuni.cz> and
+                  Jakub Jelinek <jj@ultra.linux.cz>.
+   This version is developed using the same algorithm as the fast C
+   version which carries the following introduction:
+   Based on strlen implementation by Torbjorn Granlund (tege@sics.se),
+   with help from Dan Sahlin (dan@sics.se) and
+   commentary by Jim Blandy (jimb@ai.mit.edu);
+   adaptation to memchr suggested by Dick Karpinski (dick@cca.ucsf.edu),
+   and implemented by Roland McGrath (roland@ai.mit.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/>.  */
+
+#include <sysdep.h>
+#include <asm/asi.h>
+#ifndef XCC
+#define XCC xcc
+#define USE_BPR
+	.register	%g2, #scratch
+	.register	%g3, #scratch
+#endif
+
+	/* Normally, this uses
+	   ((xword - 0x0101010101010101) & 0x8080808080808080) test
+	   to find out if any byte in xword could be zero. This is fast, but
+	   also gives false alarm for any byte in range 0x81-0xff. It does
+	   not matter for correctness, as if this test tells us there could
+	   be some zero byte, we check it byte by byte, but if bytes with
+	   high bits set are common in the strings, then this will give poor
+	   performance. You can #define EIGHTBIT_NOT_RARE and the algorithm
+	   will use one tick slower, but more precise test
+	   ((xword - 0x0101010101010101) & (~xword) & 0x8080808080808080),
+	   which does not give any false alarms (but if some bits are set,
+	   one cannot assume from it which bytes are zero and which are not).
+	   It is yet to be measured, what is the correct default for glibc
+	   in these days for an average user.
+	 */
+
+	.text
+	.align		32
+ENTRY(__memchr)
+	and		%o1, 0xff, %o1			/* IEU0		Group		*/
+#ifdef USE_BPR
+	brz,pn		%o2, 12f			/* CTI+IEU1			*/
+#else
+	tst		%o2				/* IEU1				*/
+	be,pn		%XCC, 12f			/* CTI				*/
+#endif
+	 sll		%o1, 8, %g3			/* IEU0		Group		*/
+	addcc		%o0, %o2, %o2			/* IEU1				*/
+	movcs		%XCC, -1, %o2			/* IEU0		Group		*/
+
+	sethi		%hi(0x01010101), %g1		/* IEU0		Group		*/
+	or		%g3, %o1, %g3			/* IEU1				*/
+	ldub		[%o0], %o3			/* Load				*/
+	sllx		%g3, 16, %g5			/* IEU0		Group		*/
+
+	or		%g1, %lo(0x01010101), %g1	/* IEU1				*/
+	sllx		%g1, 32, %g2			/* IEU0		Group		*/
+	or		%g3, %g5, %g3			/* IEU1				*/
+	sllx		%g3, 32, %g5			/* IEU0		Group		*/
+
+	cmp		%o3, %o1			/* IEU1				*/
+	be,pn		%xcc, 13f			/* CTI				*/
+	 or		%g1, %g2, %g1			/* IEU0		Group		*/
+	andcc		%o0, 7, %g0			/* IEU1				*/
+
+	bne,a,pn	%icc, 21f			/* CTI				*/
+	 add		%o0, 1, %o0			/* IEU0		Group		*/
+	ldx		[%o0], %o3			/* Load		Group		*/
+	sllx		%g1, 7, %g2			/* IEU0				*/
+
+	or		%g3, %g5, %g3			/* IEU1				*/
+1:	add		%o0, 8, %o0			/* IEU0		Group		*/
+	xor		%o3, %g3, %o4			/* IEU1				*/
+							/* %g1 = 0101010101010101	*
+							 * %g2 = 8080088080808080	*
+							 * %g3 =  c c c c c c c c	*
+							 * %o3 =      value		*
+							 * %o4 =   value XOR c		*/
+2:	cmp		%o0, %o2			/* IEU1		Group		*/
+
+	bgu,pn		%XCC, 11f			/* CTI				*/
+	 ldxa		[%o0] ASI_PNF, %o3		/* Load				*/
+	sub		%o4, %g1, %o5			/* IEU0		Group		*/
+	add		%o0, 8, %o0			/* IEU1				*/
+#ifdef EIGHTBIT_NOT_RARE
+	andn		%o5, %o4, %o5			/* IEU0		Group		*/
+#endif
+
+	andcc		%o5, %g2, %g0			/* IEU1		Group		*/
+	be,a,pt		%xcc, 2b			/* CTI				*/
+	 xor		%o3, %g3, %o4			/* IEU0				*/
+	srlx		%o4, 56, %g5			/* IEU0				*/
+
+	andcc		%g5, 0xff, %g0			/* IEU1		Group		*/
+	be,pn		%icc, 3f			/* CTI				*/
+	 srlx		%o4, 48, %g5			/* IEU0				*/
+	andcc		%g5, 0xff, %g0			/* IEU1		Group		*/
+
+	be,pn		%icc, 4f			/* CTI				*/
+	 srlx		%o4, 40, %g5			/* IEU0				*/
+	andcc		%g5, 0xff, %g0			/* IEU1		Group		*/
+	be,pn		%icc, 5f			/* CTI				*/
+
+	 srlx		%o4, 32, %g5			/* IEU0				*/
+	andcc		%g5, 0xff, %g0			/* IEU1		Group		*/
+	be,pn		%icc, 6f			/* CTI				*/
+	 srlx		%o4, 24, %g5			/* IEU0				*/
+
+	andcc		%g5, 0xff, %g0			/* IEU1		Group		*/
+	be,pn		%icc, 7f			/* CTI				*/
+	 srlx		%o4, 16, %g5			/* IEU0				*/
+	andcc		%g5, 0xff, %g0			/* IEU1		Group		*/
+
+	be,pn		%icc, 8f			/* CTI				*/
+	 srlx		%o4, 8, %g5			/* IEU0				*/
+	andcc		%g5, 0xff, %g0			/* IEU1		Group		*/
+	be,pn		%icc, 9f			/* CTI				*/
+
+	 andcc		%o4, 0xff, %g0			/* IEU1		Group		*/
+	bne,pt		%icc, 2b			/* CTI				*/
+	 xor		%o3, %g3, %o4			/* IEU0				*/
+	retl						/* CTI+IEU1	Group		*/
+
+	 add		%o0, -9, %o0			/* IEU0				*/
+
+	.align		16
+3:	retl						/* CTI+IEU1	Group		*/
+	 add		%o0, -16, %o0			/* IEU0				*/
+4:   	retl						/* CTI+IEU1	Group		*/
+	 add		%o0, -15, %o0			/* IEU0				*/
+
+5:	retl						/* CTI+IEU1	Group		*/
+	 add		%o0, -14, %o0			/* IEU0				*/
+6:	retl						/* CTI+IEU1	Group		*/
+	 add		%o0, -13, %o0			/* IEU0				*/
+
+7:	retl						/* CTI+IEU1	Group		*/
+	 add		%o0, -12, %o0			/* IEU0				*/
+8:	retl						/* CTI+IEU1	Group		*/
+	 add		%o0, -11, %o0			/* IEU0				*/
+
+9:	retl						/* CTI+IEU1	Group		*/
+	 add		%o0, -10, %o0			/* IEU0				*/
+11:	sub		%o4, %g1, %o5			/* IEU0		Group		*/
+	sub		%o0, 8, %o0			/* IEU1				*/
+
+	andcc		%o5, %g2, %g0			/* IEU1		Group		*/
+	be,pt		%xcc, 12f			/* CTI				*/
+	 sub		%o2, %o0, %o2			/* IEU0				*/
+	tst		%o2				/* IEU1		Group		*/
+
+	be,pn		%XCC, 12f			/* CTI				*/
+	 srlx		%o4, 56, %g5			/* IEU0				*/
+	andcc		%g5, 0xff, %g0			/* IEU1		Group		*/
+	be,pn		%icc, 13f			/* CTI				*/
+
+	 cmp		%o2, 1				/* IEU0				*/
+	be,pn		%XCC, 12f			/* CTI		Group		*/
+	 srlx		%o4, 48, %g5			/* IEU0				*/
+	andcc		%g5, 0xff, %g0			/* IEU1		Group		*/
+
+	be,pn		%icc, 14f			/* CTI				*/
+	 cmp		%o2, 2				/* IEU1		Group		*/
+	be,pn		%XCC, 12f			/* CTI				*/
+	 srlx		%o4, 40, %g5			/* IEU0				*/
+
+	andcc		%g5, 0xff, %g0			/* IEU1		Group		*/
+	be,pn		%icc, 15f			/* CTI				*/
+	 cmp		%o2, 3				/* IEU1		Group		*/
+	be,pn		%XCC, 12f			/* CTI				*/
+
+	 srlx		%o4, 32, %g5			/* IEU0				*/
+	andcc		%g5, 0xff, %g0			/* IEU1		Group		*/
+	be,pn		%icc, 16f			/* CTI				*/
+	 cmp		%o2, 4				/* IEU1		Group		*/
+
+	be,pn		%XCC, 12f			/* CTI				*/
+	 srlx		%o4, 24, %g5			/* IEU0				*/
+	andcc		%g5, 0xff, %g0			/* IEU1		Group		*/
+	be,pn		%icc, 17f			/* CTI				*/
+
+	 cmp		%o2, 5				/* IEU1		Group		*/
+	be,pn		%XCC, 12f			/* CTI				*/
+	 srlx		%o4, 16, %g5			/* IEU0				*/
+	andcc		%g5, 0xff, %g0			/* IEU1		Group		*/
+
+	be,pn		%icc, 18f			/* CTI				*/
+	 cmp		%o2, 6				/* IEU1		Group		*/
+	be,pn		%XCC, 12f			/* CTI				*/
+	 srlx		%o4, 8, %g5			/* IEU0				*/
+
+	andcc		%g5, 0xff, %g0			/* IEU1		Group		*/
+	be,pn		%icc, 19f			/* CTI				*/
+	 nop						/* IEU0				*/
+12:	retl						/* CTI+IEU1	Group		*/
+
+	 clr		%o0				/* IEU0				*/
+	nop						/* Stub				*/
+13:	retl						/* CTI+IEU1	Group		*/
+	 nop						/* IEU0				*/
+
+14:	retl						/* CTI+IEU1	Group		*/
+	 add		%o0, 1, %o0			/* IEU0				*/
+15:	retl						/* CTI+IEU1	Group		*/
+	 add		%o0, 2, %o0			/* IEU0				*/
+
+16:	retl						/* CTI+IEU1	Group		*/
+	 add		%o0, 3, %o0			/* IEU0				*/
+17:	retl						/* CTI+IEU1	Group		*/
+	 add		%o0, 4, %o0			/* IEU0				*/
+
+18:	retl						/* CTI+IEU1	Group		*/
+	 add		%o0, 5, %o0			/* IEU0				*/
+19:	retl						/* CTI+IEU1	Group		*/
+	 add		%o0, 6, %o0			/* IEU0				*/
+
+21:	cmp		%o0, %o2			/* IEU1				*/
+	be,pn		%XCC, 12b			/* CTI				*/
+	 sllx		%g1, 7, %g2			/* IEU0		Group		*/
+	ldub		[%o0], %o3			/* Load				*/
+
+	or		%g3, %g5, %g3			/* IEU1				*/
+22:	andcc		%o0, 7, %g0			/* IEU1		Group		*/
+	be,a,pn		%icc, 1b			/* CTI				*/
+	 ldx		[%o0], %o3			/* Load				*/
+
+	cmp		%o3, %o1			/* IEU1		Group		*/
+	be,pn		%xcc, 23f			/* CTI				*/
+	 add		%o0, 1, %o0			/* IEU0				*/
+	cmp		%o0, %o2			/* IEU1		Group		*/
+
+	bne,a,pt	%XCC, 22b			/* CTI				*/
+	 ldub		[%o0], %o3			/* Load				*/
+	retl						/* CTI+IEU1	Group		*/
+	 clr		%o0				/* IEU0				*/
+
+23:	retl						/* CTI+IEU1	Group		*/
+	 add		%o0, -1, %o0			/* IEU0				*/
+END(__memchr)
+
+weak_alias (__memchr, memchr)
+libc_hidden_builtin_def (memchr)