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, 498 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/sparc/sparc64/multiarch/memcpy-niagara2.S b/REORG.TODO/sysdeps/sparc/sparc64/multiarch/memcpy-niagara2.S
new file mode 100644
index 0000000000..798b3c80fe
--- /dev/null
+++ b/REORG.TODO/sysdeps/sparc/sparc64/multiarch/memcpy-niagara2.S
@@ -0,0 +1,498 @@
+/* Copy SIZE bytes from SRC to DEST.  For SUN4V Niagara-2.
+   Copyright (C) 2007-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by David S. Miller (davem@davemloft.net)
+
+   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>
+
+#define ASI_BLK_INIT_QUAD_LDD_P	0xe2
+#define ASI_BLK_P		0xf0
+#define ASI_P			0x80
+#define ASI_PNF			0x82
+
+#define FPRS_FEF		0x04
+
+#define VISEntryHalf			\
+	rd	%fprs, %o5;		\
+	wr	%g0, FPRS_FEF, %fprs
+
+#define VISExitHalf			\
+	and	%o5, FPRS_FEF, %o5;	\
+	wr	%o5, 0x0, %fprs
+
+#define STORE_ASI		ASI_BLK_INIT_QUAD_LDD_P
+
+#define LOAD(type,addr,dest)	type [addr], dest
+#define LOAD_BLK(addr,dest)	ldda [addr] ASI_BLK_P, dest
+#define STORE(type,src,addr)	type src, [addr]
+#define STORE_BLK(src,addr)	stda src, [addr] ASI_BLK_P
+#define STORE_INIT(src,addr)	stxa src, [addr] STORE_ASI
+
+#ifndef XCC
+#define USE_BPR
+#define XCC xcc
+#endif
+
+#define FREG_FROB(x0, x1, x2, x3, x4, x5, x6, x7, x8) \
+	faligndata	%x0, %x1, %f0; \
+	faligndata	%x1, %x2, %f2; \
+	faligndata	%x2, %x3, %f4; \
+	faligndata	%x3, %x4, %f6; \
+	faligndata	%x4, %x5, %f8; \
+	faligndata	%x5, %x6, %f10; \
+	faligndata	%x6, %x7, %f12; \
+	faligndata	%x7, %x8, %f14;
+
+#define FREG_MOVE_1(x0) \
+	fsrc2		%x0, %f0;
+#define FREG_MOVE_2(x0, x1) \
+	fsrc2		%x0, %f0; \
+	fsrc2		%x1, %f2;
+#define FREG_MOVE_3(x0, x1, x2) \
+	fsrc2		%x0, %f0; \
+	fsrc2		%x1, %f2; \
+	fsrc2		%x2, %f4;
+#define FREG_MOVE_4(x0, x1, x2, x3) \
+	fsrc2		%x0, %f0; \
+	fsrc2		%x1, %f2; \
+	fsrc2		%x2, %f4; \
+	fsrc2		%x3, %f6;
+#define FREG_MOVE_5(x0, x1, x2, x3, x4) \
+	fsrc2		%x0, %f0; \
+	fsrc2		%x1, %f2; \
+	fsrc2		%x2, %f4; \
+	fsrc2		%x3, %f6; \
+	fsrc2		%x4, %f8;
+#define FREG_MOVE_6(x0, x1, x2, x3, x4, x5) \
+	fsrc2		%x0, %f0; \
+	fsrc2		%x1, %f2; \
+	fsrc2		%x2, %f4; \
+	fsrc2		%x3, %f6; \
+	fsrc2		%x4, %f8; \
+	fsrc2		%x5, %f10;
+#define FREG_MOVE_7(x0, x1, x2, x3, x4, x5, x6) \
+	fsrc2		%x0, %f0; \
+	fsrc2		%x1, %f2; \
+	fsrc2		%x2, %f4; \
+	fsrc2		%x3, %f6; \
+	fsrc2		%x4, %f8; \
+	fsrc2		%x5, %f10; \
+	fsrc2		%x6, %f12;
+#define FREG_MOVE_8(x0, x1, x2, x3, x4, x5, x6, x7) \
+	fsrc2		%x0, %f0; \
+	fsrc2		%x1, %f2; \
+	fsrc2		%x2, %f4; \
+	fsrc2		%x3, %f6; \
+	fsrc2		%x4, %f8; \
+	fsrc2		%x5, %f10; \
+	fsrc2		%x6, %f12; \
+	fsrc2		%x7, %f14;
+#define FREG_LOAD_1(base, x0) \
+	LOAD(ldd, base + 0x00, %x0)
+#define FREG_LOAD_2(base, x0, x1) \
+	LOAD(ldd, base + 0x00, %x0); \
+	LOAD(ldd, base + 0x08, %x1);
+#define FREG_LOAD_3(base, x0, x1, x2) \
+	LOAD(ldd, base + 0x00, %x0); \
+	LOAD(ldd, base + 0x08, %x1); \
+	LOAD(ldd, base + 0x10, %x2);
+#define FREG_LOAD_4(base, x0, x1, x2, x3) \
+	LOAD(ldd, base + 0x00, %x0); \
+	LOAD(ldd, base + 0x08, %x1); \
+	LOAD(ldd, base + 0x10, %x2); \
+	LOAD(ldd, base + 0x18, %x3);
+#define FREG_LOAD_5(base, x0, x1, x2, x3, x4) \
+	LOAD(ldd, base + 0x00, %x0); \
+	LOAD(ldd, base + 0x08, %x1); \
+	LOAD(ldd, base + 0x10, %x2); \
+	LOAD(ldd, base + 0x18, %x3); \
+	LOAD(ldd, base + 0x20, %x4);
+#define FREG_LOAD_6(base, x0, x1, x2, x3, x4, x5) \
+	LOAD(ldd, base + 0x00, %x0); \
+	LOAD(ldd, base + 0x08, %x1); \
+	LOAD(ldd, base + 0x10, %x2); \
+	LOAD(ldd, base + 0x18, %x3); \
+	LOAD(ldd, base + 0x20, %x4); \
+	LOAD(ldd, base + 0x28, %x5);
+#define FREG_LOAD_7(base, x0, x1, x2, x3, x4, x5, x6) \
+	LOAD(ldd, base + 0x00, %x0); \
+	LOAD(ldd, base + 0x08, %x1); \
+	LOAD(ldd, base + 0x10, %x2); \
+	LOAD(ldd, base + 0x18, %x3); \
+	LOAD(ldd, base + 0x20, %x4); \
+	LOAD(ldd, base + 0x28, %x5); \
+	LOAD(ldd, base + 0x30, %x6);
+
+#if IS_IN (libc)
+
+	.register	%g2,#scratch
+	.register	%g3,#scratch
+	.register	%g6,#scratch
+
+	.text
+
+ENTRY(__mempcpy_niagara2)
+	ba,pt		%XCC, 101f
+	 add		%o0, %o2, %g5
+END(__mempcpy_niagara2)
+
+	.align		32
+ENTRY(__memcpy_niagara2)
+100:	/* %o0=dst, %o1=src, %o2=len */
+	mov		%o0, %g5
+101:
+# ifndef USE_BPR
+	srl		%o2, 0, %o2
+# endif
+	cmp		%o2, 0
+	be,pn		%XCC, 85f
+218:	 or		%o0, %o1, %o3
+	cmp		%o2, 16
+	blu,a,pn	%XCC, 80f
+	 or		%o3, %o2, %o3
+
+	/* 2 blocks (128 bytes) is the minimum we can do the block
+	 * copy with.  We need to ensure that we'll iterate at least
+	 * once in the block copy loop.  At worst we'll need to align
+	 * the destination to a 64-byte boundary which can chew up
+	 * to (64 - 1) bytes from the length before we perform the
+	 * block copy loop.
+	 *
+	 * However, the cut-off point, performance wise, is around
+	 * 4 64-byte blocks.
+	 */
+	cmp		%o2, (4 * 64)
+	blu,pt		%XCC, 75f
+	 andcc		%o3, 0x7, %g0
+
+	/* %o0:	dst
+	 * %o1:	src
+	 * %o2:	len  (known to be >= 128)
+	 *
+	 * The block copy loops can use %o4, %g2, %g3 as
+	 * temporaries while copying the data.  %o5 must
+	 * be preserved between VISEntryHalf and VISExitHalf
+	 */
+
+	LOAD(prefetch, %o1 + 0x000, #one_read)
+	LOAD(prefetch, %o1 + 0x040, #one_read)
+	LOAD(prefetch, %o1 + 0x080, #one_read)
+
+	/* Align destination on 64-byte boundary.  */
+	andcc		%o0, (64 - 1), %o4
+	be,pt		%XCC, 2f
+	 sub		%o4, 64, %o4
+	sub		%g0, %o4, %o4	! bytes to align dst
+	sub		%o2, %o4, %o2
+1:	subcc		%o4, 1, %o4
+	LOAD(ldub, %o1, %g1)
+	STORE(stb, %g1, %o0)
+	add		%o1, 1, %o1
+	bne,pt		%XCC, 1b
+	add		%o0, 1, %o0
+
+2:
+	/* Clobbers o5/g1/g2/g3/g7/icc/xcc.  We must preserve
+	 * o5 from here until we hit VISExitHalf.
+	 */
+	VISEntryHalf
+
+	membar		#Sync
+	alignaddr	%o1, %g0, %g0
+
+	add		%o1, (64 - 1), %o4
+	andn		%o4, (64 - 1), %o4
+	andn		%o2, (64 - 1), %g1
+	sub		%o2, %g1, %o2
+
+	and		%o1, (64 - 1), %g2
+	add		%o1, %g1, %o1
+	sub		%o0, %o4, %g3
+	brz,pt		%g2, 190f
+	 cmp		%g2, 32
+	blu,a		5f
+	 cmp		%g2, 16
+	cmp		%g2, 48
+	blu,a		4f
+	 cmp		%g2, 40
+	cmp		%g2, 56
+	blu		170f
+	 nop
+	ba,a,pt		%xcc, 180f
+
+4:	/* 32 <= low bits < 48 */
+	blu		150f
+	 nop
+	ba,a,pt		%xcc, 160f
+5:	/* 0 < low bits < 32 */
+	blu,a		6f
+	 cmp		%g2, 8
+	cmp		%g2, 24
+	blu		130f
+	 nop
+	ba,a,pt		%xcc, 140f
+6:	/* 0 < low bits < 16 */
+	bgeu		120f
+	 nop
+	/* fall through for 0 < low bits < 8 */
+110:	sub		%o4, 64, %g2
+	LOAD_BLK(%g2, %f0)
+1:	STORE_INIT(%g0, %o4 + %g3)
+	LOAD_BLK(%o4, %f16)
+	FREG_FROB(f0, f2, f4, f6, f8, f10, f12, f14, f16)
+	STORE_BLK(%f0, %o4 + %g3)
+	FREG_MOVE_8(f16, f18, f20, f22, f24, f26, f28, f30)
+	subcc		%g1, 64, %g1
+	add		%o4, 64, %o4
+	bne,pt		%XCC, 1b
+	 LOAD(prefetch, %o4 + 64, #one_read)
+	ba,pt		%xcc, 195f
+	 nop
+
+120:	sub		%o4, 56, %g2
+	FREG_LOAD_7(%g2, f0, f2, f4, f6, f8, f10, f12)
+1:	STORE_INIT(%g0, %o4 + %g3)
+	LOAD_BLK(%o4, %f16)
+	FREG_FROB(f0, f2, f4, f6, f8, f10, f12, f16, f18)
+	STORE_BLK(%f0, %o4 + %g3)
+	FREG_MOVE_7(f18, f20, f22, f24, f26, f28, f30)
+	subcc		%g1, 64, %g1
+	add		%o4, 64, %o4
+	bne,pt		%XCC, 1b
+	 LOAD(prefetch, %o4 + 64, #one_read)
+	ba,pt		%xcc, 195f
+	 nop
+
+130:	sub		%o4, 48, %g2
+	FREG_LOAD_6(%g2, f0, f2, f4, f6, f8, f10)
+1:	STORE_INIT(%g0, %o4 + %g3)
+	LOAD_BLK(%o4, %f16)
+	FREG_FROB(f0, f2, f4, f6, f8, f10, f16, f18, f20)
+	STORE_BLK(%f0, %o4 + %g3)
+	FREG_MOVE_6(f20, f22, f24, f26, f28, f30)
+	subcc		%g1, 64, %g1
+	add		%o4, 64, %o4
+	bne,pt		%XCC, 1b
+	 LOAD(prefetch, %o4 + 64, #one_read)
+	ba,pt		%xcc, 195f
+	 nop
+
+140:	sub		%o4, 40, %g2
+	FREG_LOAD_5(%g2, f0, f2, f4, f6, f8)
+1:	STORE_INIT(%g0, %o4 + %g3)
+	LOAD_BLK(%o4, %f16)
+	FREG_FROB(f0, f2, f4, f6, f8, f16, f18, f20, f22)
+	STORE_BLK(%f0, %o4 + %g3)
+	FREG_MOVE_5(f22, f24, f26, f28, f30)
+	subcc		%g1, 64, %g1
+	add		%o4, 64, %o4
+	bne,pt		%XCC, 1b
+	 LOAD(prefetch, %o4 + 64, #one_read)
+	ba,pt		%xcc, 195f
+	 nop
+
+150:	sub		%o4, 32, %g2
+	FREG_LOAD_4(%g2, f0, f2, f4, f6)
+1:	STORE_INIT(%g0, %o4 + %g3)
+	LOAD_BLK(%o4, %f16)
+	FREG_FROB(f0, f2, f4, f6, f16, f18, f20, f22, f24)
+	STORE_BLK(%f0, %o4 + %g3)
+	FREG_MOVE_4(f24, f26, f28, f30)
+	subcc		%g1, 64, %g1
+	add		%o4, 64, %o4
+	bne,pt		%XCC, 1b
+	 LOAD(prefetch, %o4 + 64, #one_read)
+	ba,pt		%xcc, 195f
+	 nop
+
+160:	sub		%o4, 24, %g2
+	FREG_LOAD_3(%g2, f0, f2, f4)
+1:	STORE_INIT(%g0, %o4 + %g3)
+	LOAD_BLK(%o4, %f16)
+	FREG_FROB(f0, f2, f4, f16, f18, f20, f22, f24, f26)
+	STORE_BLK(%f0, %o4 + %g3)
+	FREG_MOVE_3(f26, f28, f30)
+	subcc		%g1, 64, %g1
+	add		%o4, 64, %o4
+	bne,pt		%XCC, 1b
+	 LOAD(prefetch, %o4 + 64, #one_read)
+	ba,pt		%xcc, 195f
+	 nop
+
+170:	sub		%o4, 16, %g2
+	FREG_LOAD_2(%g2, f0, f2)
+1:	STORE_INIT(%g0, %o4 + %g3)
+	LOAD_BLK(%o4, %f16)
+	FREG_FROB(f0, f2, f16, f18, f20, f22, f24, f26, f28)
+	STORE_BLK(%f0, %o4 + %g3)
+	FREG_MOVE_2(f28, f30)
+	subcc		%g1, 64, %g1
+	add		%o4, 64, %o4
+	bne,pt		%XCC, 1b
+	 LOAD(prefetch, %o4 + 64, #one_read)
+	ba,pt		%xcc, 195f
+	 nop
+
+180:	sub		%o4, 8, %g2
+	FREG_LOAD_1(%g2, f0)
+1:	STORE_INIT(%g0, %o4 + %g3)
+	LOAD_BLK(%o4, %f16)
+	FREG_FROB(f0, f16, f18, f20, f22, f24, f26, f28, f30)
+	STORE_BLK(%f0, %o4 + %g3)
+	FREG_MOVE_1(f30)
+	subcc		%g1, 64, %g1
+	add		%o4, 64, %o4
+	bne,pt		%XCC, 1b
+	 LOAD(prefetch, %o4 + 64, #one_read)
+	ba,pt		%xcc, 195f
+	 nop
+
+190:
+1:	STORE_INIT(%g0, %o4 + %g3)
+	subcc		%g1, 64, %g1
+	LOAD_BLK(%o4, %f0)
+	STORE_BLK(%f0, %o4 + %g3)
+	add		%o4, 64, %o4
+	bne,pt		%XCC, 1b
+	 LOAD(prefetch, %o4 + 64, #one_read)
+
+195:
+	add		%o4, %g3, %o0
+	membar		#Sync
+
+	VISExitHalf
+
+	/* %o2 contains any final bytes still needed to be copied
+	 * over. If anything is left, we copy it one byte at a time.
+	 */
+	brz,pt		%o2, 85f
+	 sub		%o0, %o1, %o3
+	ba,a,pt		%XCC, 90f
+
+	.align		64
+75: /* 16 < len <= 64 */
+	bne,pn		%XCC, 75f
+	 sub		%o0, %o1, %o3
+
+72:
+	andn		%o2, 0xf, %o4
+	and		%o2, 0xf, %o2
+1:	subcc		%o4, 0x10, %o4
+	LOAD(ldx, %o1, %o5)
+	add		%o1, 0x08, %o1
+	LOAD(ldx, %o1, %g1)
+	sub		%o1, 0x08, %o1
+	STORE(stx, %o5, %o1 + %o3)
+	add		%o1, 0x8, %o1
+	STORE(stx, %g1, %o1 + %o3)
+	bgu,pt		%XCC, 1b
+	 add		%o1, 0x8, %o1
+73:	andcc		%o2, 0x8, %g0
+	be,pt		%XCC, 1f
+	 nop
+	sub		%o2, 0x8, %o2
+	LOAD(ldx, %o1, %o5)
+	STORE(stx, %o5, %o1 + %o3)
+	add		%o1, 0x8, %o1
+1:	andcc		%o2, 0x4, %g0
+	be,pt		%XCC, 1f
+	 nop
+	sub		%o2, 0x4, %o2
+	LOAD(lduw, %o1, %o5)
+	STORE(stw, %o5, %o1 + %o3)
+	add		%o1, 0x4, %o1
+1:	cmp		%o2, 0
+	be,pt		%XCC, 85f
+	 nop
+	ba,pt		%xcc, 90f
+	 nop
+
+75:
+	andcc		%o0, 0x7, %g1
+	sub		%g1, 0x8, %g1
+	be,pn		%icc, 2f
+	 sub		%g0, %g1, %g1
+	sub		%o2, %g1, %o2
+
+1:	subcc		%g1, 1, %g1
+	LOAD(ldub, %o1, %o5)
+	STORE(stb, %o5, %o1 + %o3)
+	bgu,pt		%icc, 1b
+	 add		%o1, 1, %o1
+
+2:	add		%o1, %o3, %o0
+	andcc		%o1, 0x7, %g1
+	bne,pt		%icc, 8f
+	 sll		%g1, 3, %g1
+
+	cmp		%o2, 16
+	bgeu,pt		%icc, 72b
+	 nop
+	ba,a,pt		%xcc, 73b
+
+8:	mov		64, %o3
+	andn		%o1, 0x7, %o1
+	LOAD(ldx, %o1, %g2)
+	sub		%o3, %g1, %o3
+	andn		%o2, 0x7, %o4
+	sllx		%g2, %g1, %g2
+1:	add		%o1, 0x8, %o1
+	LOAD(ldx, %o1, %g3)
+	subcc		%o4, 0x8, %o4
+	srlx		%g3, %o3, %o5
+	or		%o5, %g2, %o5
+	STORE(stx, %o5, %o0)
+	add		%o0, 0x8, %o0
+	bgu,pt		%icc, 1b
+	 sllx		%g3, %g1, %g2
+
+	srl		%g1, 3, %g1
+	andcc		%o2, 0x7, %o2
+	be,pn		%icc, 85f
+	 add		%o1, %g1, %o1
+	ba,pt		%xcc, 90f
+	 sub		%o0, %o1, %o3
+
+	.align		64
+80: /* 0 < len <= 16 */
+	andcc		%o3, 0x3, %g0
+	bne,pn		%XCC, 90f
+	 sub		%o0, %o1, %o3
+
+1:
+	subcc		%o2, 4, %o2
+	LOAD(lduw, %o1, %g1)
+	STORE(stw, %g1, %o1 + %o3)
+	bgu,pt		%XCC, 1b
+	 add		%o1, 4, %o1
+
+85:	retl
+	 mov		%g5, %o0
+
+	.align		32
+90:
+	subcc		%o2, 1, %o2
+	LOAD(ldub, %o1, %g1)
+	STORE(stb, %g1, %o1 + %o3)
+	bgu,pt		%XCC, 90b
+	 add		%o1, 1, %o1
+	retl
+	 mov		%g5, %o0
+
+END(__memcpy_niagara2)
+
+#endif