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/* mc68020 __gmpn_add_n -- Add two limb vectors of the same length > 0 and store
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sum in a third limb vector.
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Copyright (C) 1992, 1994, 1996, 1999, 2000 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA. */
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#include "asm-syntax.h"
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GLOBL C_SYMBOL_NAME(__gmpn_add_n)
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C_SYMBOL_NAME(__gmpn_add_n:)
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/* Save used registers on the stack. */
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movel R(d2),MEM_PREDEC(sp)
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movel R(a2),MEM_PREDEC(sp)
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/* Copy the arguments to registers. Better use movem? */
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movel MEM_DISP(sp,12),R(a2)
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movel MEM_DISP(sp,16),R(a0)
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movel MEM_DISP(sp,20),R(a1)
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movel MEM_DISP(sp,24),R(d2)
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subql #1,R(d2) /* clears cy as side effect */
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movel MEM_POSTINC(a0),R(d0)
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movel MEM_POSTINC(a1),R(d1)
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movel R(d0),MEM_POSTINC(a2)
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L(L1:) movel MEM_POSTINC(a0),R(d0)
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movel MEM_POSTINC(a1),R(d1)
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movel R(d0),MEM_POSTINC(a2)
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dbf R(d2),L(Loop) /* loop until 16 lsb of %4 == -1 */
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subxl R(d0),R(d0) /* d0 <= -cy; save cy as 0 or -1 in d0 */
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addl R(d0),R(d0) /* restore cy */
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/* Restore used registers from stack frame. */
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movel MEM_POSTINC(sp),R(a2)
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movel MEM_POSTINC(sp),R(d2)