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-/* mc68020 __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
-   store difference in a third limb vector.
-
-Copyright (C) 1992, 1994, 1996, 1998 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; see the file COPYING.LIB.  If not, write to
-the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
-MA 02111-1307, USA. */
-
-/*
-  INPUT PARAMETERS
-  res_ptr	(sp + 4)
-  s1_ptr	(sp + 8)
-  s2_ptr	(sp + 16)
-  size		(sp + 12)
-*/
-
-#include "sysdep.h"
-#include "asm-syntax.h"
-
-	TEXT
-ENTRY(__mpn_sub_n)
-/* Save used registers on the stack.  */
-	movel	R(d2),MEM_PREDEC(sp)
-	movel	R(a2),MEM_PREDEC(sp)
-
-/* Copy the arguments to registers.  Better use movem?  */
-	movel	MEM_DISP(sp,12),R(a2)
-	movel	MEM_DISP(sp,16),R(a0)
-	movel	MEM_DISP(sp,20),R(a1)
-	movel	MEM_DISP(sp,24),R(d2)
-
-	eorw	#1,R(d2)
-	lsrl	#1,R(d2)
-	bcc	L(L1)
-	subql	#1,R(d2)	/* clears cy as side effect */
-
-L(Loop:)
-	movel	MEM_POSTINC(a0),R(d0)
-	movel	MEM_POSTINC(a1),R(d1)
-	subxl	R(d1),R(d0)
-	movel	R(d0),MEM_POSTINC(a2)
-L(L1:)	movel	MEM_POSTINC(a0),R(d0)
-	movel	MEM_POSTINC(a1),R(d1)
-	subxl	R(d1),R(d0)
-	movel	R(d0),MEM_POSTINC(a2)
-
-	dbf	R(d2),L(Loop)		/* loop until 16 lsb of %4 == -1 */
-	subxl	R(d0),R(d0)	/* d0 <= -cy; save cy as 0 or -1 in d0 */
-	subl	#0x10000,R(d2)
-	bcs	L(L2)
-	addl	R(d0),R(d0)	/* restore cy */
-	bra	L(Loop)
-
-L(L2:)
-	negl	R(d0)
-
-/* Restore used registers from stack frame.  */
-	movel	MEM_POSTINC(sp),R(a2)
-	movel	MEM_POSTINC(sp),R(d2)
-
-	rts
-END(__mpn_sub_n)