diff options
Diffstat (limited to 'rts/gmp/mpn/z8000x/sub_n.s')
| -rw-r--r-- | rts/gmp/mpn/z8000x/sub_n.s | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/rts/gmp/mpn/z8000x/sub_n.s b/rts/gmp/mpn/z8000x/sub_n.s new file mode 100644 index 0000000000..f416d1d6eb --- /dev/null +++ b/rts/gmp/mpn/z8000x/sub_n.s @@ -0,0 +1,56 @@ +! Z8000 (32 bit limb version) __gmpn_sub_n -- Subtract two limb vectors of the +! same length > 0 and store difference in a third limb vector. + +! Copyright (C) 1993, 1994, 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 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... + + segm + .text + even + global ___gmpn_sub_n +___gmpn_sub_n: + popl rr0,@r6 + popl rr8,@r5 + subl rr0,rr8 + ldl @r7,rr0 + dec r4 + jr eq,Lend +Loop: popl rr0,@r6 + popl rr8,@r5 + sbc r1,r9 + sbc r0,r8 + inc r7,#4 + ldl @r7,rr0 + dec r4 + jr ne,Loop +Lend: ld r2,r4 ! use 0 already in r4 + ld r3,r4 + adc r2,r2 + ret t |