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dnl HP-PA mpn_add_n -- Add two limb vectors of the same length > 0 and store
dnl sum in a third limb vector.
dnl Copyright 1992, 1994, 2000, 2001, 2002 Free Software Foundation, Inc.
dnl This file is part of the GNU MP Library.
dnl The GNU MP Library is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU Lesser General Public License as published
dnl by the Free Software Foundation; either version 2.1 of the License, or (at
dnl your option) any later version.
dnl The GNU MP Library is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
dnl License for more details.
dnl You should have received a copy of the GNU Lesser General Public License
dnl along with the GNU MP Library; see the file COPYING.LIB. If not, write to
dnl the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
dnl MA 02111-1307, USA.
include(`../config.m4')
C INPUT PARAMETERS
C res_ptr gr26
C s1_ptr gr25
C s2_ptr gr24
C size gr23
C One might want to unroll this as for other processors, but it turns out that
C the data cache contention after a store makes such unrolling useless. We
C can't come under 5 cycles/limb anyway.
ASM_START()
PROLOGUE(mpn_add_n)
ldws,ma 4(0,%r25),%r20
ldws,ma 4(0,%r24),%r19
addib,= -1,%r23,L(end) C check for (SIZE == 1)
add %r20,%r19,%r28 C add first limbs ignoring cy
LDEF(loop)
ldws,ma 4(0,%r25),%r20
ldws,ma 4(0,%r24),%r19
stws,ma %r28,4(0,%r26)
addib,<> -1,%r23,L(loop)
addc %r20,%r19,%r28
LDEF(end)
stws %r28,0(0,%r26)
bv 0(%r2)
addc %r0,%r0,%r28
EPILOGUE()
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