| dnl mc68020 mpn_addmul_1, mpn_submul_1 -- add or subtract mpn multiple. |
| |
| dnl Copyright 1992, 1994, 1996, 1999, 2000, 2001, 2002 Free Software |
| dnl Foundation, Inc. |
| dnl |
| dnl This file is part of the GNU MP Library. |
| dnl |
| dnl The GNU MP Library is free software; you can redistribute it and/or |
| dnl modify it under the terms of the GNU Lesser General Public License as |
| dnl published by the Free Software Foundation; either version 3 of the |
| dnl License, or (at your option) any later version. |
| dnl |
| dnl The GNU MP Library is distributed in the hope that it will be useful, |
| dnl but WITHOUT ANY WARRANTY; without even the implied warranty of |
| dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| dnl Lesser General Public License for more details. |
| dnl |
| 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 cycles/limb |
| C 68040: 25 |
| |
| ifdef(`OPERATION_addmul_1',` |
| define(M4_inst, addl) |
| define(M4_function_1, mpn_addmul_1) |
| ',`ifdef(`OPERATION_submul_1',` |
| define(M4_inst, subl) |
| define(M4_function_1, mpn_submul_1) |
| ', |
| `m4_error(`Need OPERATION_addmul_1 or OPERATION_submul_1 |
| ')')') |
| |
| |
| C INPUT PARAMETERS |
| C res_ptr (sp + 4) |
| C s1_ptr (sp + 8) |
| C s1_size (sp + 12) |
| C s2_limb (sp + 16) |
| |
| define(res_ptr, `a0') |
| define(s1_ptr, `a1') |
| define(s1_size, `d2') |
| define(s2_limb, `d4') |
| |
| |
| PROLOGUE(M4_function_1) |
| |
| C Save used registers on the stack. |
| moveml d2-d5, M(-,sp) |
| |
| C Copy the arguments to registers. Better use movem? |
| movel M(sp,20), res_ptr |
| movel M(sp,24), s1_ptr |
| movel M(sp,28), s1_size |
| movel M(sp,32), s2_limb |
| |
| eorw #1, s1_size |
| clrl d1 |
| clrl d5 |
| lsrl #1, s1_size |
| bcc L(L1) |
| subql #1, s1_size |
| subl d0, d0 C (d0,cy) <= (0,0) |
| |
| L(Loop): |
| movel M(s1_ptr,+), d3 |
| mulul s2_limb, d1:d3 |
| addxl d0, d3 |
| addxl d5, d1 |
| M4_inst d3, M(res_ptr,+) |
| L(L1): movel M(s1_ptr,+), d3 |
| mulul s2_limb, d0:d3 |
| addxl d1, d3 |
| addxl d5, d0 |
| M4_inst d3, M(res_ptr,+) |
| |
| dbf s1_size, L(Loop) |
| addxl d5, d0 |
| subl #0x10000, s1_size |
| bcc L(Loop) |
| |
| C Restore used registers from stack frame. |
| moveml M(sp,+), d2-d5 |
| |
| rts |
| |
| EPILOGUE(M4_function_1) |
