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| author | Joseph Myers <joseph@codesourcery.com> | 2012-07-01 13:08:59 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2012-07-01 13:08:59 +0000 |
| commit | e84eabb3871c9b39e59323bf3f6b98c2ca9d1cd0 (patch) | |
| tree | dff3f1b79454b518d15a7b9bbedeb57ff156bbe8 /ports/sysdeps/hppa/add_n.S | |
| parent | 75f0d3040a2c2de8842bfa7a09e11da1a73e17d0 (diff) | |
| parent | e64ac02c24b43659048622714afdc92fedf561fa (diff) | |
Merge glibc-ports into ports/ directory.glibc-2.16-ports-merge
Diffstat (limited to 'ports/sysdeps/hppa/add_n.S')
| -rw-r--r-- | ports/sysdeps/hppa/add_n.S | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/ports/sysdeps/hppa/add_n.S b/ports/sysdeps/hppa/add_n.S new file mode 100644 index 0000000000..df5ceb8bcb --- /dev/null +++ b/ports/sysdeps/hppa/add_n.S @@ -0,0 +1,57 @@ +;! HP-PA __mpn_add_n -- Add two limb vectors of the same length > 0 and store +;! sum 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_add_n +__mpn_add_n: + .proc + .callinfo frame=0,no_calls + .entry + + ldws,ma 4(%r25),%r21 + ldws,ma 4(%r24),%r20 + + addib,= -1,%r23,L$end ;! check for (SIZE == 1) + add %r21,%r20,%r28 ;! add first limbs ignoring cy + +L$loop: ldws,ma 4(%r25),%r21 + ldws,ma 4(%r24),%r20 + stws,ma %r28,4(%r26) + addib,<> -1,%r23,L$loop + addc %r21,%r20,%r28 + +L$end: stws %r28,0(%r26) + bv 0(%r2) + addc %r0,%r0,%r28 + + .exit + .procend |