;! 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, 1994 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