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).

8 files changed, 569 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/m68k/m680x0/m68020/Makefile b/REORG.TODO/sysdeps/m68k/m680x0/m68020/Makefile
new file mode 100644
index 0000000000..b17635467d
--- /dev/null
+++ b/REORG.TODO/sysdeps/m68k/m680x0/m68020/Makefile
@@ -0,0 +1,3 @@
+ifeq ($(subdir),db2)
+CPPFLAGS += -DHAVE_SPINLOCKS=1 -DHAVE_ASSEM_MC68020_GCC=1
+endif
diff --git a/REORG.TODO/sysdeps/m68k/m680x0/m68020/addmul_1.S b/REORG.TODO/sysdeps/m68k/m680x0/m68020/addmul_1.S
new file mode 100644
index 0000000000..53856c0846
--- /dev/null
+++ b/REORG.TODO/sysdeps/m68k/m680x0/m68020/addmul_1.S
@@ -0,0 +1,88 @@
+/* mc68020 __mpn_addmul_1 -- Multiply a limb vector with a limb and add
+   the result to a second limb vector.
+
+Copyright (C) 1992-2017 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP 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 MP 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 MP Library.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/*
+  INPUT PARAMETERS
+  res_ptr	(sp + 4)
+  s1_ptr	(sp + 8)
+  s1_size	(sp + 12)
+  s2_limb	(sp + 16)
+*/
+
+#include "sysdep.h"
+#include "asm-syntax.h"
+
+	TEXT
+ENTRY(__mpn_addmul_1)
+
+#define res_ptr a0
+#define s1_ptr a1
+#define s1_size d2
+#define s2_limb d4
+
+/* Save used registers on the stack.  */
+	moveml	R(d2)-R(d5),MEM_PREDEC(sp)
+	cfi_adjust_cfa_offset (4*4)
+	cfi_rel_offset (R(d2), 0)
+	cfi_rel_offset (R(d3), 4)
+	cfi_rel_offset (R(d4), 8)
+	cfi_rel_offset (R(d5), 12)
+
+/* Copy the arguments to registers.  Better use movem?  */
+	movel	MEM_DISP(sp,20),R(res_ptr)
+	movel	MEM_DISP(sp,24),R(s1_ptr)
+	movel	MEM_DISP(sp,28),R(s1_size)
+	movel	MEM_DISP(sp,32),R(s2_limb)
+
+	eorw	#1,R(s1_size)
+	clrl	R(d1)
+	clrl	R(d5)
+	lsrl	#1,R(s1_size)
+	bcc	L(L1)
+	subql	#1,R(s1_size)
+	subl	R(d0),R(d0)		/* (d0,cy) <= (0,0) */
+
+L(Loop:)
+	movel	MEM_POSTINC(s1_ptr),R(d3)
+	mulul	R(s2_limb),R(d1):R(d3)
+	addxl	R(d0),R(d3)
+	addxl	R(d5),R(d1)
+	addl	R(d3),MEM_POSTINC(res_ptr)
+L(L1:)	movel	MEM_POSTINC(s1_ptr),R(d3)
+	mulul	R(s2_limb),R(d0):R(d3)
+	addxl	R(d1),R(d3)
+	addxl	R(d5),R(d0)
+	addl	R(d3),MEM_POSTINC(res_ptr)
+
+	dbf	R(s1_size),L(Loop)
+	addxl	R(d5),R(d0)
+	subl	#0x10000,R(s1_size)
+	bcc	L(Loop)
+
+/* Restore used registers from stack frame.  */
+	moveml	MEM_POSTINC(sp),R(d2)-R(d5)
+	cfi_adjust_cfa_offset (-4*4)
+	cfi_restore (R(d2))
+	cfi_restore (R(d3))
+	cfi_restore (R(d4))
+	cfi_restore (R(d5))
+
+	rts
+END(__mpn_addmul_1)
diff --git a/REORG.TODO/sysdeps/m68k/m680x0/m68020/atomic-machine.h b/REORG.TODO/sysdeps/m68k/m680x0/m68020/atomic-machine.h
new file mode 100644
index 0000000000..83238f51de
--- /dev/null
+++ b/REORG.TODO/sysdeps/m68k/m680x0/m68020/atomic-machine.h
@@ -0,0 +1,261 @@
+/* Copyright (C) 2003-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Andreas Schwab <schwab@suse.de>, 2003.
+
+   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 <stdint.h>
+
+
+typedef int8_t atomic8_t;
+typedef uint8_t uatomic8_t;
+typedef int_fast8_t atomic_fast8_t;
+typedef uint_fast8_t uatomic_fast8_t;
+
+typedef int16_t atomic16_t;
+typedef uint16_t uatomic16_t;
+typedef int_fast16_t atomic_fast16_t;
+typedef uint_fast16_t uatomic_fast16_t;
+
+typedef int32_t atomic32_t;
+typedef uint32_t uatomic32_t;
+typedef int_fast32_t atomic_fast32_t;
+typedef uint_fast32_t uatomic_fast32_t;
+
+typedef int64_t atomic64_t;
+typedef uint64_t uatomic64_t;
+typedef int_fast64_t atomic_fast64_t;
+typedef uint_fast64_t uatomic_fast64_t;
+
+typedef intptr_t atomicptr_t;
+typedef uintptr_t uatomicptr_t;
+typedef intmax_t atomic_max_t;
+typedef uintmax_t uatomic_max_t;
+
+#define __HAVE_64B_ATOMICS 1
+#define USE_ATOMIC_COMPILER_BUILTINS 0
+
+/* XXX Is this actually correct?  */
+#define ATOMIC_EXCHANGE_USES_CAS 1
+
+#define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
+  ({ __typeof (*(mem)) __ret;						      \
+     __asm __volatile ("cas%.b %0,%2,%1"				      \
+		       : "=d" (__ret), "+m" (*(mem))			      \
+		       : "d" (newval), "0" (oldval));			      \
+     __ret; })
+
+#define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \
+  ({ __typeof (*(mem)) __ret;						      \
+     __asm __volatile ("cas%.w %0,%2,%1"				      \
+		       : "=d" (__ret), "+m" (*(mem))			      \
+		       : "d" (newval), "0" (oldval));			      \
+     __ret; })
+
+#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
+  ({ __typeof (*(mem)) __ret;						      \
+     __asm __volatile ("cas%.l %0,%2,%1"				      \
+		       : "=d" (__ret), "+m" (*(mem))			      \
+		       : "d" (newval), "0" (oldval));			      \
+     __ret; })
+
+# define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
+  ({ __typeof (*(mem)) __ret;						      \
+     __typeof (mem) __memp = (mem);					      \
+     __asm __volatile ("cas2%.l %0:%R0,%1:%R1,(%2):(%3)"		      \
+		       : "=d" (__ret)					      \
+		       : "d" ((__typeof (*(mem))) (newval)), "r" (__memp),    \
+			 "r" ((char *) __memp + 4), "0" (oldval)	      \
+		       : "memory");					      \
+     __ret; })
+
+#define atomic_exchange_acq(mem, newvalue) \
+  ({ __typeof (*(mem)) __result = *(mem);				      \
+     if (sizeof (*(mem)) == 1)						      \
+       __asm __volatile ("1: cas%.b %0,%2,%1;"				      \
+			 "   jbne 1b"					      \
+			 : "=d" (__result), "+m" (*(mem))		      \
+			 : "d" (newvalue), "0" (__result));		      \
+     else if (sizeof (*(mem)) == 2)					      \
+       __asm __volatile ("1: cas%.w %0,%2,%1;"				      \
+			 "   jbne 1b"					      \
+			 : "=d" (__result), "+m" (*(mem))		      \
+			 : "d" (newvalue), "0" (__result));		      \
+     else if (sizeof (*(mem)) == 4)					      \
+       __asm __volatile ("1: cas%.l %0,%2,%1;"				      \
+			 "   jbne 1b"					      \
+			 : "=d" (__result), "+m" (*(mem))		      \
+			 : "d" (newvalue), "0" (__result));		      \
+     else								      \
+       {								      \
+	 __typeof (mem) __memp = (mem);					      \
+	 __asm __volatile ("1: cas2%.l %0:%R0,%1:%R1,(%2):(%3);"	      \
+			   "   jbne 1b"					      \
+			   : "=d" (__result)				      \
+			   : "d" ((__typeof (*(mem))) (newvalue)),	      \
+			     "r" (__memp), "r" ((char *) __memp + 4),	      \
+			     "0" (__result)				      \
+			   : "memory");					      \
+       }								      \
+     __result; })
+
+#define atomic_exchange_and_add(mem, value) \
+  ({ __typeof (*(mem)) __result = *(mem);				      \
+     __typeof (*(mem)) __temp;						      \
+     if (sizeof (*(mem)) == 1)						      \
+       __asm __volatile ("1: move%.b %0,%2;"				      \
+			 "   add%.b %3,%2;"				      \
+			 "   cas%.b %0,%2,%1;"				      \
+			 "   jbne 1b"					      \
+			 : "=d" (__result), "+m" (*(mem)),		      \
+			   "=&d" (__temp)				      \
+			 : "d" (value), "0" (__result));		      \
+     else if (sizeof (*(mem)) == 2)					      \
+       __asm __volatile ("1: move%.w %0,%2;"				      \
+			 "   add%.w %3,%2;"				      \
+			 "   cas%.w %0,%2,%1;"				      \
+			 "   jbne 1b"					      \
+			 : "=d" (__result), "+m" (*(mem)),		      \
+			   "=&d" (__temp)				      \
+			 : "d" (value), "0" (__result));		      \
+     else if (sizeof (*(mem)) == 4)					      \
+       __asm __volatile ("1: move%.l %0,%2;"				      \
+			 "   add%.l %3,%2;"				      \
+			 "   cas%.l %0,%2,%1;"				      \
+			 "   jbne 1b"					      \
+			 : "=d" (__result), "+m" (*(mem)),		      \
+			   "=&d" (__temp)				      \
+			 : "d" (value), "0" (__result));		      \
+     else								      \
+       {								      \
+	 __typeof (mem) __memp = (mem);					      \
+	 __asm __volatile ("1: move%.l %0,%1;"				      \
+			   "   move%.l %R0,%R1;"			      \
+			   "   add%.l %R2,%R1;"				      \
+			   "   addx%.l %2,%1;"				      \
+			   "   cas2%.l %0:%R0,%1:%R1,(%3):(%4);"	      \
+			   "   jbne 1b"					      \
+			   : "=d" (__result), "=&d" (__temp)		      \
+			   : "d" ((__typeof (*(mem))) (value)), "r" (__memp), \
+			     "r" ((char *) __memp + 4), "0" (__result)	      \
+			   : "memory");					      \
+       }								      \
+     __result; })
+
+#define atomic_add(mem, value) \
+  (void) ({ if (sizeof (*(mem)) == 1)					      \
+	      __asm __volatile ("add%.b %1,%0"				      \
+				: "+m" (*(mem))				      \
+				: "id" (value));			      \
+	    else if (sizeof (*(mem)) == 2)				      \
+	      __asm __volatile ("add%.w %1,%0"				      \
+				: "+m" (*(mem))				      \
+				: "id" (value));			      \
+	    else if (sizeof (*(mem)) == 4)				      \
+	      __asm __volatile ("add%.l %1,%0"				      \
+				: "+m" (*(mem))				      \
+				: "id" (value));			      \
+	    else							      \
+	      {								      \
+		__typeof (mem) __memp = (mem);				      \
+		__typeof (*(mem)) __oldval = *__memp;			      \
+		__typeof (*(mem)) __temp;				      \
+		__asm __volatile ("1: move%.l %0,%1;"			      \
+				  "   move%.l %R0,%R1;"			      \
+				  "   add%.l %R2,%R1;"			      \
+				  "   addx%.l %2,%1;"			      \
+				  "   cas2%.l %0:%R0,%1:%R1,(%3):(%4);"	      \
+				  "   jbne 1b"				      \
+				  : "=d" (__oldval), "=&d" (__temp)	      \
+				  : "d" ((__typeof (*(mem))) (value)),	      \
+				    "r" (__memp), "r" ((char *) __memp + 4),  \
+				    "0" (__oldval)			      \
+				  : "memory");				      \
+	      }								      \
+	    })
+
+#define atomic_increment_and_test(mem) \
+  ({ char __result;							      \
+     if (sizeof (*(mem)) == 1)						      \
+       __asm __volatile ("addq%.b %#1,%1; seq %0"			      \
+			 : "=dm" (__result), "+m" (*(mem)));		      \
+     else if (sizeof (*(mem)) == 2)					      \
+       __asm __volatile ("addq%.w %#1,%1; seq %0"			      \
+			 : "=dm" (__result), "+m" (*(mem)));		      \
+     else if (sizeof (*(mem)) == 4)					      \
+       __asm __volatile ("addq%.l %#1,%1; seq %0"			      \
+			 : "=dm" (__result), "+m" (*(mem)));		      \
+     else								      \
+       {								      \
+	 __typeof (mem) __memp = (mem);					      \
+	 __typeof (*(mem)) __oldval = *__memp;				      \
+	 __typeof (*(mem)) __temp;					      \
+	 __asm __volatile ("1: move%.l %1,%2;"				      \
+			   "   move%.l %R1,%R2;"			      \
+			   "   addq%.l %#1,%R2;"			      \
+			   "   addx%.l %5,%2;"				      \
+			   "   seq %0;"					      \
+			   "   cas2%.l %1:%R1,%2:%R2,(%3):(%4);"	      \
+			   "   jbne 1b"					      \
+			   : "=&dm" (__result), "=d" (__oldval),	      \
+			     "=&d" (__temp)				      \
+			   : "r" (__memp), "r" ((char *) __memp + 4),	      \
+			     "d" (0), "1" (__oldval)			      \
+			   : "memory");					      \
+       }								      \
+     __result; })
+
+#define atomic_decrement_and_test(mem) \
+  ({ char __result;							      \
+     if (sizeof (*(mem)) == 1)						      \
+       __asm __volatile ("subq%.b %#1,%1; seq %0"			      \
+			 : "=dm" (__result), "+m" (*(mem)));		      \
+     else if (sizeof (*(mem)) == 2)					      \
+       __asm __volatile ("subq%.w %#1,%1; seq %0"			      \
+			 : "=dm" (__result), "+m" (*(mem)));		      \
+     else if (sizeof (*(mem)) == 4)					      \
+       __asm __volatile ("subq%.l %#1,%1; seq %0"			      \
+			 : "=dm" (__result), "+m" (*(mem)));		      \
+     else								      \
+       {								      \
+	 __typeof (mem) __memp = (mem);					      \
+	 __typeof (*(mem)) __oldval = *__memp;				      \
+	 __typeof (*(mem)) __temp;					      \
+	 __asm __volatile ("1: move%.l %1,%2;"				      \
+			   "   move%.l %R1,%R2;"			      \
+			   "   subq%.l %#1,%R2;"			      \
+			   "   subx%.l %5,%2;"				      \
+			   "   seq %0;"					      \
+			   "   cas2%.l %1:%R1,%2:%R2,(%3):(%4);"	      \
+			   "   jbne 1b"					      \
+			   : "=&dm" (__result), "=d" (__oldval),	      \
+			     "=&d" (__temp)				      \
+			   : "r" (__memp), "r" ((char *) __memp + 4),	      \
+			     "d" (0), "1" (__oldval)			      \
+			   : "memory");					      \
+       }								      \
+     __result; })
+
+#define atomic_bit_set(mem, bit) \
+  __asm __volatile ("bfset %0{%1,#1}"					      \
+		    : "+m" (*(mem))					      \
+		    : "di" (sizeof (*(mem)) * 8 - (bit) - 1))
+
+#define atomic_bit_test_set(mem, bit) \
+  ({ char __result;							      \
+     __asm __volatile ("bfset %1{%2,#1}; sne %0"			      \
+		       : "=dm" (__result), "+m" (*(mem))		      \
+		       : "di" (sizeof (*(mem)) * 8 - (bit) - 1));	      \
+     __result; })
diff --git a/REORG.TODO/sysdeps/m68k/m680x0/m68020/bits/string.h b/REORG.TODO/sysdeps/m68k/m680x0/m68020/bits/string.h
new file mode 100644
index 0000000000..120afc0d79
--- /dev/null
+++ b/REORG.TODO/sysdeps/m68k/m680x0/m68020/bits/string.h
@@ -0,0 +1,24 @@
+/* Optimized, inlined string functions.  m680x0 version, x >= 2.
+   Copyright (C) 1997-2017 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/>.  */
+
+#ifndef _STRING_H
+# error "Never use <bits/string.h> directly; include <string.h> instead."
+#endif
+
+/* Use the unaligned string inline ABI.  */
+#define _STRING_INLINE_unaligned 1
diff --git a/REORG.TODO/sysdeps/m68k/m680x0/m68020/mul_1.S b/REORG.TODO/sysdeps/m68k/m680x0/m68020/mul_1.S
new file mode 100644
index 0000000000..ee871d2e44
--- /dev/null
+++ b/REORG.TODO/sysdeps/m68k/m680x0/m68020/mul_1.S
@@ -0,0 +1,83 @@
+/* mc68020 __mpn_mul_1 -- Multiply a limb vector with a limb and store
+   the result in a second limb vector.
+
+Copyright (C) 1992-2017 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP 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 MP 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 MP Library.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/*
+  INPUT PARAMETERS
+  res_ptr	(sp + 4)
+  s1_ptr	(sp + 8)
+  s1_size	(sp + 12)
+  s2_limb	(sp + 16)
+*/
+
+#include "sysdep.h"
+#include "asm-syntax.h"
+
+	TEXT
+ENTRY(__mpn_mul_1)
+
+#define res_ptr a0
+#define s1_ptr a1
+#define s1_size d2
+#define s2_limb d4
+
+/* Save used registers on the stack.  */
+	moveml	R(d2)-R(d4),MEM_PREDEC(sp)
+	cfi_adjust_cfa_offset (3*4)
+	cfi_rel_offset (R(d2), 0)
+	cfi_rel_offset (R(d3), 4)
+	cfi_rel_offset (R(d4), 8)
+
+/* Copy the arguments to registers.  Better use movem?  */
+	movel	MEM_DISP(sp,16),R(res_ptr)
+	movel	MEM_DISP(sp,20),R(s1_ptr)
+	movel	MEM_DISP(sp,24),R(s1_size)
+	movel	MEM_DISP(sp,28),R(s2_limb)
+
+	eorw	#1,R(s1_size)
+	clrl	R(d1)
+	lsrl	#1,R(s1_size)
+	bcc	L(L1)
+	subql	#1,R(s1_size)
+	subl	R(d0),R(d0)	/* (d0,cy) <= (0,0) */
+
+L(Loop:)
+	movel	MEM_POSTINC(s1_ptr),R(d3)
+	mulul	R(s2_limb),R(d1):R(d3)
+	addxl	R(d0),R(d3)
+	movel	R(d3),MEM_POSTINC(res_ptr)
+L(L1:)	movel	MEM_POSTINC(s1_ptr),R(d3)
+	mulul	R(s2_limb),R(d0):R(d3)
+	addxl	R(d1),R(d3)
+	movel	R(d3),MEM_POSTINC(res_ptr)
+
+	dbf	R(s1_size),L(Loop)
+	clrl	R(d3)
+	addxl	R(d3),R(d0)
+	subl	#0x10000,R(s1_size)
+	bcc	L(Loop)
+
+/* Restore used registers from stack frame.  */
+	moveml	MEM_POSTINC(sp),R(d2)-R(d4)
+	cfi_adjust_cfa_offset (-3*4)
+	cfi_restore (R(d2))
+	cfi_restore (R(d3))
+	cfi_restore (R(d4))
+	rts
+END(__mpn_mul_1)
diff --git a/REORG.TODO/sysdeps/m68k/m680x0/m68020/string_private.h b/REORG.TODO/sysdeps/m68k/m680x0/m68020/string_private.h
new file mode 100644
index 0000000000..a35ce053bb
--- /dev/null
+++ b/REORG.TODO/sysdeps/m68k/m680x0/m68020/string_private.h
@@ -0,0 +1,21 @@
+/* Define _STRING_ARCH_unaligned.  m680x0 version, x >= 2.
+   Copyright (C) 2016-2017 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/>.  */
+
+/* Tell the generic inline macros that unaligned memory access is
+   possible.  */
+#define _STRING_ARCH_unaligned   1
diff --git a/REORG.TODO/sysdeps/m68k/m680x0/m68020/submul_1.S b/REORG.TODO/sysdeps/m68k/m680x0/m68020/submul_1.S
new file mode 100644
index 0000000000..268e6bf38d
--- /dev/null
+++ b/REORG.TODO/sysdeps/m68k/m680x0/m68020/submul_1.S
@@ -0,0 +1,88 @@
+/* mc68020 __mpn_submul_1 -- Multiply a limb vector with a limb and subtract
+   the result from a second limb vector.
+
+Copyright (C) 1992-2017 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP 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 MP 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 MP Library.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/*
+  INPUT PARAMETERS
+  res_ptr	(sp + 4)
+  s1_ptr	(sp + 8)
+  s1_size	(sp + 12)
+  s2_limb	(sp + 16)
+*/
+
+#include "sysdep.h"
+#include "asm-syntax.h"
+
+	TEXT
+ENTRY(__mpn_submul_1)
+
+#define res_ptr a0
+#define s1_ptr a1
+#define s1_size d2
+#define s2_limb d4
+
+/* Save used registers on the stack.  */
+	moveml	R(d2)-R(d5),MEM_PREDEC(sp)
+	cfi_adjust_cfa_offset (4*4)
+	cfi_rel_offset (R(d2), 0)
+	cfi_rel_offset (R(d3), 4)
+	cfi_rel_offset (R(d4), 8)
+	cfi_rel_offset (R(d5), 12)
+
+/* Copy the arguments to registers.  Better use movem?  */
+	movel	MEM_DISP(sp,20),R(res_ptr)
+	movel	MEM_DISP(sp,24),R(s1_ptr)
+	movel	MEM_DISP(sp,28),R(s1_size)
+	movel	MEM_DISP(sp,32),R(s2_limb)
+
+	eorw	#1,R(s1_size)
+	clrl	R(d1)
+	clrl	R(d5)
+	lsrl	#1,R(s1_size)
+	bcc	L(L1)
+	subql	#1,R(s1_size)
+	subl	R(d0),R(d0)	/* (d0,cy) <= (0,0) */
+
+L(Loop:)
+	movel	MEM_POSTINC(s1_ptr),R(d3)
+	mulul	R(s2_limb),R(d1):R(d3)
+	addxl	R(d0),R(d3)
+	addxl	R(d5),R(d1)
+	subl	R(d3),MEM_POSTINC(res_ptr)
+L(L1:)	movel	MEM_POSTINC(s1_ptr),R(d3)
+	mulul	R(s2_limb),R(d0):R(d3)
+	addxl	R(d1),R(d3)
+	addxl	R(d5),R(d0)
+	subl	R(d3),MEM_POSTINC(res_ptr)
+
+	dbf	R(s1_size),L(Loop)
+	addxl	R(d5),R(d0)
+	subl	#0x10000,R(s1_size)
+	bcc	L(Loop)
+
+/* Restore used registers from stack frame.  */
+	moveml	MEM_POSTINC(sp),R(d2)-R(d5)
+	cfi_adjust_cfa_offset (-4*4)
+	cfi_restore (R(d2))
+	cfi_restore (R(d3))
+	cfi_restore (R(d4))
+	cfi_restore (R(d5))
+
+	rts
+END(__mpn_submul_1)
diff --git a/REORG.TODO/sysdeps/m68k/m680x0/m68020/wordcopy.S b/REORG.TODO/sysdeps/m68k/m680x0/m68020/wordcopy.S
new file mode 100644
index 0000000000..4fb1a4518f
--- /dev/null
+++ b/REORG.TODO/sysdeps/m68k/m680x0/m68020/wordcopy.S
@@ -0,0 +1 @@
+/* Empty, not needed.  */