mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-18 02:50:09 +00:00
77 lines
2.1 KiB
ArmAsm
77 lines
2.1 KiB
ArmAsm
/* mc68020 __mpn_add_n -- Add two limb vectors of the same length > 0 and store
|
|
sum in a third limb vector.
|
|
|
|
Copyright (C) 1992, 1994 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 Library General Public License as published by
|
|
the Free Software Foundation; either version 2 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 Library General Public
|
|
License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public License
|
|
along with the GNU MP Library; see the file COPYING.LIB. If not, write to
|
|
the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|
|
|
/*
|
|
INPUT PARAMETERS
|
|
res_ptr (sp + 4)
|
|
s1_ptr (sp + 8)
|
|
s2_ptr (sp + 16)
|
|
size (sp + 12)
|
|
*/
|
|
|
|
#include "asm-syntax.h"
|
|
|
|
TEXT
|
|
ALIGN
|
|
GLOBL ___mpn_add_n
|
|
|
|
LAB(___mpn_add_n)
|
|
/* Save used registers on the stack. */
|
|
INSN2(move,l ,MEM_PREDEC(sp),d2)
|
|
INSN2(move,l ,MEM_PREDEC(sp),a2)
|
|
|
|
/* Copy the arguments to registers. Better use movem? */
|
|
INSN2(move,l ,a2,MEM_DISP(sp,12))
|
|
INSN2(move,l ,a0,MEM_DISP(sp,16))
|
|
INSN2(move,l ,a1,MEM_DISP(sp,20))
|
|
INSN2(move,l ,d2,MEM_DISP(sp,24))
|
|
|
|
INSN2(eor,w ,d2,#1)
|
|
INSN2(lsr,l ,d2,#1)
|
|
bcc L1
|
|
INSN2(subq,l ,d2,#1) /* clears cy as side effect */
|
|
|
|
LAB(Loop)
|
|
INSN2(move,l ,d0,MEM_POSTINC(a0))
|
|
INSN2(move,l ,d1,MEM_POSTINC(a1))
|
|
INSN2(addx,l ,d0,d1)
|
|
INSN2(move,l ,MEM_POSTINC(a2),d0)
|
|
LAB(L1) INSN2(move,l ,d0,MEM_POSTINC(a0))
|
|
INSN2(move,l ,d1,MEM_POSTINC(a1))
|
|
INSN2(addx,l ,d0,d1)
|
|
INSN2(move,l ,MEM_POSTINC(a2),d0)
|
|
|
|
dbf d2,Loop /* loop until 16 lsb of %4 == -1 */
|
|
INSN2(subx,l ,d0,d0) /* d0 <= -cy; save cy as 0 or -1 in d0 */
|
|
INSN2(sub,l ,d2,#0x10000)
|
|
bcs L2
|
|
INSN2(add,l ,d0,d0) /* restore cy */
|
|
bra Loop
|
|
|
|
LAB(L2)
|
|
INSN1(neg,l ,d0)
|
|
|
|
/* Restore used registers from stack frame. */
|
|
INSN2(move,l ,a2,MEM_POSTINC(sp))
|
|
INSN2(move,l ,d2,MEM_POSTINC(sp))
|
|
|
|
rts
|