89 lines
2.0 KiB
NASM
89 lines
2.0 KiB
NASM
dnl mc68020 mpn_mul_1 -- mpn by limb multiply
|
|
|
|
dnl Copyright 1992, 1994, 1996, 1999, 2000, 2001, 2002 Free Software
|
|
dnl Foundation, Inc.
|
|
dnl
|
|
dnl This file is part of the GNU MP Library.
|
|
dnl
|
|
dnl The GNU MP Library is free software; you can redistribute it and/or
|
|
dnl modify it under the terms of the GNU Lesser General Public License as
|
|
dnl published by the Free Software Foundation; either version 2.1 of the
|
|
dnl License, or (at your option) any later version.
|
|
dnl
|
|
dnl The GNU MP Library is distributed in the hope that it will be useful,
|
|
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
dnl Lesser General Public License for more details.
|
|
dnl
|
|
dnl You should have received a copy of the GNU Lesser General Public
|
|
dnl License along with the GNU MP Library; see the file COPYING.LIB. If
|
|
dnl not, write to the Free Software Foundation, Inc., 51 Franklin Street,
|
|
dnl Fifth Floor, Boston, MA 02110-1301, USA.
|
|
|
|
include(`../config.m4')
|
|
|
|
C cycles/limb
|
|
C 68040: 24
|
|
|
|
C INPUT PARAMETERS
|
|
C res_ptr (sp + 4)
|
|
C s1_ptr (sp + 8)
|
|
C s1_size (sp + 12)
|
|
C s2_limb (sp + 16)
|
|
|
|
|
|
define(res_ptr, `a0')
|
|
define(s1_ptr, `a1')
|
|
define(s1_size, `d2')
|
|
define(s2_limb, `d4')
|
|
|
|
|
|
PROLOGUE(mpn_mul_1)
|
|
|
|
C Save used registers on the stack.
|
|
moveml d2-d4, M(-,sp)
|
|
|
|
C movel d2, M(-,sp)
|
|
C movel d3, M(-,sp)
|
|
C movel d4, M(-,sp)
|
|
|
|
C Copy the arguments to registers. Better use movem?
|
|
movel M(sp,16), res_ptr
|
|
movel M(sp,20), s1_ptr
|
|
movel M(sp,24), s1_size
|
|
movel M(sp,28), s2_limb
|
|
|
|
eorw #1, s1_size
|
|
clrl d1
|
|
lsrl #1, s1_size
|
|
bcc L(L1)
|
|
subql #1, s1_size
|
|
subl d0, d0 C (d0,cy) <= (0,0)
|
|
|
|
L(Loop):
|
|
movel M(s1_ptr,+), d3
|
|
mulul s2_limb, d1:d3
|
|
addxl d0, d3
|
|
movel d3, M(res_ptr,+)
|
|
L(L1): movel M(s1_ptr,+), d3
|
|
mulul s2_limb, d0:d3
|
|
addxl d1, d3
|
|
movel d3, M(res_ptr,+)
|
|
|
|
dbf s1_size, L(Loop)
|
|
clrl d3
|
|
addxl d3, d0
|
|
subl #0x10000, s1_size
|
|
bcc L(Loop)
|
|
|
|
C Restore used registers from stack frame.
|
|
moveml M(sp,+), d2-d4
|
|
|
|
C movel M(sp,+),d4
|
|
C movel M(sp,+),d3
|
|
C movel M(sp,+),d2
|
|
|
|
rts
|
|
|
|
EPILOGUE(mpn_mul_1)
|