dnl mc68020 mpn_addmul_1, mpn_submul_1 --
add or subtract mpn multiple.
dnl Copyright 1992, 1994, 1996, 1999-2002, 2011 Free Software Foundation,
Inc.
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 modify
dnl it under the terms of either:
dnl
dnl * the GNU Lesser General
Public License as published by the Free
dnl Software Foundation
; either version 3 of the License, or (at your
dnl
option) any later
version.
dnl
dnl
or
dnl
dnl * the GNU General
Public License as published by the Free Software
dnl Foundation
; either version 2 of the License, or (at your option) any
dnl later
version.
dnl
dnl
or both in parallel, as here.
dnl
dnl The GNU MP Library is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY
; without even the implied warranty of MERCHANTABILITY
dnl
or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General
Public License
dnl
for more details.
dnl
dnl You should have received copies of the GNU General
Public License
and the
dnl GNU Lesser General
Public License along with the GNU MP Library.
If not,
dnl see
https://www.gnu.org/licenses/.
include(`../config.m4
')
C cycles/limb
C 68040: 25
ifdef(`OPERATION_addmul_1
',`
define(M4_inst, addl)
define(M4_function_1, mpn_addmul_1)
',`ifdef(`OPERATION_submul_1',`
define(M4_inst, subl)
define(M4_function_1, mpn_submul_1)
',
`m4_error(`Need OPERATION_addmul_1
or OPERATION_submul_1
')')
')
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
')
MULFUNC_PROLOGUE(mpn_addmul_1 mpn_submul_1)
PROLOGUE(M4_function_1)
C Save used registers on the
stack.
moveml d2-d5, M(-,sp)
C Copy the arguments to registers. Better use movem?
movel M(sp,20), res_ptr
movel M(sp,24), s1_ptr
movel M(sp,28), s1_size
movel M(sp,32), s2_limb
eorw #1, s1_size
clrl d1
clrl d5
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
addxl d5, d1
M4_inst d3, M(res_ptr,+)
L(L1): movel M(s1_ptr,+), d3
mulul s2_limb, d0:d3
addxl d1, d3
addxl d5, d0
M4_inst d3, M(res_ptr,+)
dbf s1_size, L(Loop)
addxl d5, d0
subl #0x10000, s1_size
bcc L(Loop)
C Restore used registers from
stack frame.
moveml M(sp,+), d2-d5
rts
EPILOGUE(M4_function_1)
