| ;! HP-PA __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and |
| ;! store difference in a third limb vector. |
| |
| ;! Copyright (C) 1992-2014 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. If not, see |
| ;! <http://www.gnu.org/licenses/>. |
| |
| |
| ;! INPUT PARAMETERS |
| ;! res_ptr gr26 |
| ;! s1_ptr gr25 |
| ;! s2_ptr gr24 |
| ;! size gr23 |
| |
| ;! One might want to unroll this as for other processors, but it turns |
| ;! out that the data cache contention after a store makes such |
| ;! unrolling useless. We can't come under 5 cycles/limb anyway. |
| |
| .text |
| .export __mpn_sub_n |
| __mpn_sub_n: |
| .proc |
| .callinfo frame=0,no_calls |
| .entry |
| |
| ldws,ma 4(%r25),%r21 |
| ldws,ma 4(%r24),%r20 |
| |
| addib,= -1,%r23,L$end ;! check for (SIZE == 1) |
| sub %r21,%r20,%r28 ;! subtract first limbs ignoring cy |
| |
| L$loop: ldws,ma 4(%r25),%r21 |
| ldws,ma 4(%r24),%r20 |
| stws,ma %r28,4(%r26) |
| addib,<> -1,%r23,L$loop |
| subb %r21,%r20,%r28 |
| |
| L$end: stws %r28,0(%r26) |
| addc %r0,%r0,%r28 |
| bv 0(%r2) |
| subi 1,%r28,%r28 |
| |
| .exit |
| .procend |
