File: [local] / OpenXM_contrib / gmp / mpn / m68k / mc68020 / Attic / submul_1.S (download)
Revision 1.1.1.2 (vendor branch), Sat Sep 9 14:12:33 2000 UTC (23 years, 11 months ago) by maekawa
Branch: GMP
CVS Tags: maekawa-ipv6, VERSION_3_1_1, VERSION_3_1, RELEASE_1_2_2, RELEASE_1_2_1, RELEASE_1_1_3 Changes since 1.1.1.1: +10 -11
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Import gmp 3.1
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/* mc68020 __gmpn_submul_1 -- Multiply a limb vector with a limb and subtract
the result from a second limb vector.
Copyright (C) 1992, 1994, 1996, 1999, 2000 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)
s1_size (sp + 12)
s2_limb (sp + 16)
*/
#include "asm-syntax.h"
TEXT
ALIGN
GLOBL C_SYMBOL_NAME(__gmpn_submul_1)
C_SYMBOL_NAME(__gmpn_submul_1:)
PROLOG(__gmpn_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)
/* 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)
rts
EPILOG(__gmpn_submul_1)