mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-27 04:41:02 +08:00
54 lines
1.5 KiB
ArmAsm
54 lines
1.5 KiB
ArmAsm
! Z8000 __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
|
|
! store difference in a third limb vector.
|
|
|
|
! Copyright (C) 1993, 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 r7
|
|
! s1_ptr r6
|
|
! s2_ptr r5
|
|
! size r4
|
|
|
|
! If we are really crazy, we can use push to write a few result words
|
|
! backwards, using push just because it is faster than reg+disp. We'd
|
|
! then add 2x the number of words written to r7...
|
|
|
|
unseg
|
|
.text
|
|
even
|
|
global ___mpn_sub_n
|
|
___mpn_sub_n:
|
|
pop r0,@r6
|
|
pop r1,@r5
|
|
sub r0,r1
|
|
ld @r7,r0
|
|
dec r4
|
|
jr eq,Lend
|
|
Loop: pop r0,@r6
|
|
pop r1,@r5
|
|
sbc r0,r1
|
|
inc r7,#2
|
|
ld @r7,r0
|
|
dec r4
|
|
jr ne,Loop
|
|
Lend: ld r2,r4 ! use 0 already in r4
|
|
adc r2,r2
|
|
ret t
|