sub_n.asm revision 1.1.1.2
1dnl SH mpn_sub_n -- Subtract two limb vectors of the same length > 0 and store 2dnl difference in a third limb vector. 3 4dnl Copyright 1995, 1997, 2000, 2011 Free Software Foundation, Inc. 5 6dnl This file is part of the GNU MP Library. 7dnl 8dnl The GNU MP Library is free software; you can redistribute it and/or modify 9dnl it under the terms of either: 10dnl 11dnl * the GNU Lesser General Public License as published by the Free 12dnl Software Foundation; either version 3 of the License, or (at your 13dnl option) any later version. 14dnl 15dnl or 16dnl 17dnl * the GNU General Public License as published by the Free Software 18dnl Foundation; either version 2 of the License, or (at your option) any 19dnl later version. 20dnl 21dnl or both in parallel, as here. 22dnl 23dnl The GNU MP Library is distributed in the hope that it will be useful, but 24dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 25dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 26dnl for more details. 27dnl 28dnl You should have received copies of the GNU General Public License and the 29dnl GNU Lesser General Public License along with the GNU MP Library. If not, 30dnl see https://www.gnu.org/licenses/. 31 32 33include(`../config.m4') 34 35C INPUT PARAMETERS 36C rp r4 37C up r5 38C vp r6 39C n r7 40 41changecom(blah) C disable # to make all C comments below work 42 43ASM_START() 44PROLOGUE(mpn_sub_n) 45 mov #0,r3 C clear cy save reg 46 47L(top): mov.l @r5+,r1 48 mov.l @r6+,r2 49 shlr r3 C restore cy 50 subc r2,r1 51 movt r3 C save cy 52 mov.l r1,@r4 53 dt r7 54 bf.s L(top) 55 add #4,r4 56 57 rts 58 mov r3,r0 C return carry-out from most significant limb 59EPILOGUE() 60