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- ;! 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; see the file COPYING.LIB. 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
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