| dnl HP-PA 2.0 32-bit mpn_add_n -- Add two limb vectors of the same length > 0 |
| dnl and store sum in a third limb vector. |
| |
| dnl Copyright 1997, 1998, 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 3 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. If not, see http://www.gnu.org/licenses/. |
| |
| include(`../config.m4') |
| |
| C INPUT PARAMETERS |
| C res_ptr gr26 |
| C s1_ptr gr25 |
| C s2_ptr gr24 |
| C size gr23 |
| |
| C This runs at 2 cycles/limb on PA8000. |
| |
| ASM_START() |
| PROLOGUE(mpn_add_n) |
| sub %r0,%r23,%r22 |
| zdep %r22,30,3,%r28 C r28 = 2 * (-n & 7) |
| zdep %r22,29,3,%r22 C r22 = 4 * (-n & 7) |
| sub %r25,%r22,%r25 C offset s1_ptr |
| sub %r24,%r22,%r24 C offset s2_ptr |
| sub %r26,%r22,%r26 C offset res_ptr |
| blr %r28,%r0 C branch into loop |
| add %r0,%r0,%r0 C reset carry |
| |
| LDEF(loop) |
| ldw 0(%r25),%r20 |
| ldw 0(%r24),%r31 |
| addc %r20,%r31,%r20 |
| stw %r20,0(%r26) |
| |
| LDEF(7) |
| ldw 4(%r25),%r21 |
| ldw 4(%r24),%r19 |
| addc %r21,%r19,%r21 |
| stw %r21,4(%r26) |
| |
| LDEF(6) |
| ldw 8(%r25),%r20 |
| ldw 8(%r24),%r31 |
| addc %r20,%r31,%r20 |
| stw %r20,8(%r26) |
| |
| LDEF(5) |
| ldw 12(%r25),%r21 |
| ldw 12(%r24),%r19 |
| addc %r21,%r19,%r21 |
| stw %r21,12(%r26) |
| |
| LDEF(4) |
| ldw 16(%r25),%r20 |
| ldw 16(%r24),%r31 |
| addc %r20,%r31,%r20 |
| stw %r20,16(%r26) |
| |
| LDEF(3) |
| ldw 20(%r25),%r21 |
| ldw 20(%r24),%r19 |
| addc %r21,%r19,%r21 |
| stw %r21,20(%r26) |
| |
| LDEF(2) |
| ldw 24(%r25),%r20 |
| ldw 24(%r24),%r31 |
| addc %r20,%r31,%r20 |
| stw %r20,24(%r26) |
| |
| LDEF(1) |
| ldw 28(%r25),%r21 |
| ldo 32(%r25),%r25 |
| ldw 28(%r24),%r19 |
| addc %r21,%r19,%r21 |
| stw %r21,28(%r26) |
| ldo 32(%r24),%r24 |
| addib,> -8,%r23,L(loop) |
| ldo 32(%r26),%r26 |
| |
| bv (%r2) |
| addc %r0,%r0,%r28 |
| EPILOGUE() |
