1 dnl SPARC mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
2 dnl store difference in a third limb vector.
4 dnl Copyright 2001 Free Software Foundation, Inc.
6 dnl This file is part of the GNU MP Library.
8 dnl The GNU MP Library is free software; you can redistribute it and/or modify
9 dnl it under the terms of the GNU Lesser General Public License as published
10 dnl by the Free Software Foundation; either version 3 of the License, or (at
11 dnl your option) any later version.
13 dnl The GNU MP Library is distributed in the hope that it will be useful, but
14 dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16 dnl License for more details.
18 dnl You should have received a copy of the GNU Lesser General Public License
19 dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
22 include(`../config.m4')
31 C This code uses 64-bit operations on `o' and `g' registers. It doesn't
32 C require that `o' registers' upper 32 bits are preserved by the operating
33 C system, but if they are not, they must be zeroed. That is indeed what
34 C happens at least on Slowaris 2.5 and 2.6.
36 C On UltraSPARC 1 and 2, this code runs at 3 cycles/limb from the Dcache and at
37 C about 10 cycles/limb from the Ecache.