1dnl mc68020 mpn_mul_1 -- mpn by limb multiply 2 3dnl Copyright 1992, 1994, 1996, 1999-2002 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 cycles/limb 34C 68040: 24 35 36C INPUT PARAMETERS 37C res_ptr (sp + 4) 38C s1_ptr (sp + 8) 39C s1_size (sp + 12) 40C s2_limb (sp + 16) 41 42 43define(res_ptr, `a0') 44define(s1_ptr, `a1') 45define(s1_size, `d2') 46define(s2_limb, `d4') 47 48 49PROLOGUE(mpn_mul_1) 50 51C Save used registers on the stack. 52 moveml d2-d4, M(-,sp) 53 54C movel d2, M(-,sp) 55C movel d3, M(-,sp) 56C movel d4, M(-,sp) 57 58C Copy the arguments to registers. Better use movem? 59 movel M(sp,16), res_ptr 60 movel M(sp,20), s1_ptr 61 movel M(sp,24), s1_size 62 movel M(sp,28), s2_limb 63 64 eorw #1, s1_size 65 clrl d1 66 lsrl #1, s1_size 67 bcc L(L1) 68 subql #1, s1_size 69 subl d0, d0 C (d0,cy) <= (0,0) 70 71L(Loop): 72 movel M(s1_ptr,+), d3 73 mulul s2_limb, d1:d3 74 addxl d0, d3 75 movel d3, M(res_ptr,+) 76L(L1): movel M(s1_ptr,+), d3 77 mulul s2_limb, d0:d3 78 addxl d1, d3 79 movel d3, M(res_ptr,+) 80 81 dbf s1_size, L(Loop) 82 clrl d3 83 addxl d3, d0 84 subl #0x10000, s1_size 85 bcc L(Loop) 86 87C Restore used registers from stack frame. 88 moveml M(sp,+), d2-d4 89 90C movel M(sp,+),d4 91C movel M(sp,+),d3 92C movel M(sp,+),d2 93 94 rts 95 96EPILOGUE(mpn_mul_1) 97