1 ! SPARC v9 __gmpn_add_n -- Add two limb vectors of the same length > 0 and store
2 ! sum in a third limb vector.
4 ! Copyright (C) 1999, 2000 Free Software Foundation, Inc.
6 ! This file is part of the GNU MP Library.
8 ! The GNU MP Library is free software; you can redistribute it and/or modify
9 ! it under the terms of the GNU Lesser General Public License as published by
10 ! the Free Software Foundation; either version 2.1 of the License, or (at your
11 ! option) any later version.
13 ! The GNU MP Library is distributed in the hope that it will be useful, but
14 ! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 ! or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16 ! License for more details.
18 ! You should have received a copy of the GNU Lesser General Public License
19 ! along with the GNU MP Library; see the file COPYING.LIB. If not, write to
20 ! the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 include(`../config.m4')
33 .register %g2,#scratch
34 .register %g3,#scratch
37 ! 12 mem ops >= 12 cycles
38 ! 8 shift insn >= 8 cycles
39 ! 8 addccc, executing alone, +8 cycles
40 ! Unrolling not mandatory...perhaps 2-way is best?
41 ! Put one ldx/stx and one s?lx per issue tuple, fill with pointer arith and loop ctl
42 ! All in all, it runs at 5 cycles/limb
66 b L(loop1) ! jump instead of executing many NOPs
69 !--------- Start main loop ---------
96 srlx %l6,32,%g5 ! asymmetry
123 brgez,pt %i3,L(loop1)
125 !--------- End main loop ---------
137 srlx %l6,32,%g5 ! asymmetry
169 L(end): addc %g0,%g0,%i0