56 lines
1.7 KiB
NASM
56 lines
1.7 KiB
NASM
|
dnl HP-PA mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
|
||
|
|
dnl store difference 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
|
||
|
|
dnl to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
||
|
|
dnl Boston, MA 02110-1301, 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_sub_n)
|
||
|
|
ldws,ma 4(0,%r25),%r20
|
||
|
|
ldws,ma 4(0,%r24),%r19
|
||
|
|
|
||
|
|
addib,= -1,%r23,L(end) C check for (SIZE == 1)
|
||
|
|
sub %r20,%r19,%r28 C subtract 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)
|
||
|
|
subb %r20,%r19,%r28
|
||
|
|
|
||
|
|
LDEF(end)
|
||
|
|
stws %r28,0(0,%r26)
|
||
|
|
addc %r0,%r0,%r28
|
||
|
|
bv 0(%r2)
|
||
|
|
subi 1,%r28,%r28
|
||
|
|
EPILOGUE()
|