1dnl SH2 mpn_submul_1 -- Multiply a limb vector with a limb and subtract the 2dnl result from a second limb vector. 3 4dnl Copyright 1995, 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 res_ptr r4 37C s1_ptr r5 38C size r6 39C s2_limb r7 40 41changecom(blah) C disable # to make all C comments below work 42 43ASM_START() 44PROLOGUE(mpn_submul_1) 45 mov #0,r2 C cy_limb = 0 46 mov #0,r0 C Keep r0 = 0 for entire loop 47 clrt 48 49L(top): mov.l @r5+,r3 50 dmulu.l r3,r7 51 sts macl,r1 52 addc r2,r1 C lo_prod += old cy_limb 53 sts mach,r2 C new cy_limb = hi_prod 54 mov.l @r4,r3 55 addc r0,r2 C cy_limb += T, T = 0 56 subc r1,r3 57 addc r0,r2 C cy_limb += T, T = 0 58 dt r6 59 mov.l r3,@r4 60 bf.s L(top) 61 add #4,r4 62 63 rts 64 mov r2,r0 65EPILOGUE() 66