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Diffstat (limited to 'sysdeps/hppa/sub_n.s')
| -rw-r--r-- | sysdeps/hppa/sub_n.s | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/sysdeps/hppa/sub_n.s b/sysdeps/hppa/sub_n.s new file mode 100644 index 0000000000..34f196826d --- /dev/null +++ b/sysdeps/hppa/sub_n.s @@ -0,0 +1,59 @@ +;! 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, write to +;! the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, +;! MA 02111-1307, USA. + + +;! 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(0,%r25),%r21 + ldws,ma 4(0,%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(0,%r25),%r21 + ldws,ma 4(0,%r24),%r20 + stws,ma %r28,4(0,%r26) + addib,<> -1,%r23,L$loop + subb %r21,%r20,%r28 + +L$end: stws %r28,0(0,%r26) + addc %r0,%r0,%r28 + bv 0(%r2) + subi 1,%r28,%r28 + + .exit + .procend |