/* __mpn_sub_n -- Add two limb vectors of the same length > 0 and store   sum in a third limb vector.   Copyright (C) 2000, 2001 Free Software Foundation, Inc.   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).   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	%r2  s1_ptr	%r3  s2_ptr	%r4  size		%r5*/#include "sysdep.h"#include "asm-syntax.h"ENTRY(__mpn_sub_n)	st     %r6,24(%r15)   # save register 6	cfi_offset (%r6, -72)	sr     %r1,%r1	lhi    %r0,1          # cannot use ahi to add carry, use slr.L0:    l      %r6,0(%r1,%r3) # .L0 -> no carry from last sub	sl     %r6,0(%r1,%r4)	st     %r6,0(%r1,%r2)	la     %r1,4(0,%r1)	brc    4,.L3.L1:    brct   %r5,.L0	slr    %r2,%r2        # no last carry to return	j      .Lexit.L2:    l      %r6,0(%r1,%r3) # .L2 -> carry from last sub	sl     %r6,0(%r1,%r4)	brc    4,.L4	slr    %r6,%r0        # no carry yet, add carry from last sub	st     %r6,0(%r1,%r2)	la     %r1,4(0,%r1)	brc    11,.L1         # new carry ?.L3:    brct   %r5,.L2	lr     %r2,%r0        # return last carry	j      .Lexit.L4:    slr    %r6,%r0        # already a carry, add carry from last sub	st     %r6,0(%r1,%r2)	la     %r1,4(0,%r1)	brct   %r5,.L2	lr     %r2,%r0        # return last carry.Lexit: l      %r6,24(%r15)   # restore register 6	br     %r14END(__mpn_sub_n)