| ! 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 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 3 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. If not, see http://www.gnu.org/licenses/. |
| |
| |
| ! 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 |