1dnl ARM/Thumb mpn_add_n. 2 3dnl Copyright 1997, 2000, 2012 Free Software Foundation, Inc. 4 5dnl This file is part of the GNU MP Library. 6dnl 7dnl The GNU MP Library is free software; you can redistribute it and/or modify 8dnl it under the terms of either: 9dnl 10dnl * the GNU Lesser General Public License as published by the Free 11dnl Software Foundation; either version 3 of the License, or (at your 12dnl option) any later version. 13dnl 14dnl or 15dnl 16dnl * the GNU General Public License as published by the Free Software 17dnl Foundation; either version 2 of the License, or (at your option) any 18dnl later version. 19dnl 20dnl or both in parallel, as here. 21dnl 22dnl The GNU MP Library is distributed in the hope that it will be useful, but 23dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 24dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 25dnl for more details. 26dnl 27dnl You should have received copies of the GNU General Public License and the 28dnl GNU Lesser General Public License along with the GNU MP Library. If not, 29dnl see https://www.gnu.org/licenses/. 30 31include(`../config.m4') 32 33C INPUT PARAMETERS 34define(`rp', r0) 35define(`up', r1) 36define(`vp', r2) 37define(`n', r3) 38 39ASM_START() 40 .thumb 41PROLOGUE(mpn_add_nc) 42 push {r4, r5, r6} 43 ldr r6, [sp, #12] C init carry save register 44 sub r6, #1 45 b L(top) 46EPILOGUE() 47PROLOGUE(mpn_add_n) 48 push {r4, r5, r6} 49 neg r6, n C init carry save register 50 51L(top): ldmia up!, {r4} C load next limb from S1 52 cmp n, r6 C tricky carry restore 53 ldmia vp!, {r5} C load next limb from S2 54 adc r4, r5 55 stmia rp!, {r4} C store result limb to RES 56 sbc r6, r6 C save negated carry 57 sub n, #1 58 bne L(top) 59 60 add r0, r6, #1 61 pop {r4, r5, r6} 62 bx lr 63EPILOGUE() 64