| Austin Schuh | dace2a6 | 2020-08-18 10:56:48 -0700 | [diff] [blame^] | 1 | dnl PowerPC mftb_function -- read time base registers. |
| 2 | |
| 3 | dnl Copyright 2002 Free Software Foundation, Inc. |
| 4 | |
| 5 | dnl This file is part of the GNU MP Library. |
| 6 | dnl |
| 7 | dnl The GNU MP Library is free software; you can redistribute it and/or modify |
| 8 | dnl it under the terms of either: |
| 9 | dnl |
| 10 | dnl * the GNU Lesser General Public License as published by the Free |
| 11 | dnl Software Foundation; either version 3 of the License, or (at your |
| 12 | dnl option) any later version. |
| 13 | dnl |
| 14 | dnl or |
| 15 | dnl |
| 16 | dnl * the GNU General Public License as published by the Free Software |
| 17 | dnl Foundation; either version 2 of the License, or (at your option) any |
| 18 | dnl later version. |
| 19 | dnl |
| 20 | dnl or both in parallel, as here. |
| 21 | dnl |
| 22 | dnl The GNU MP Library is distributed in the hope that it will be useful, but |
| 23 | dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 24 | dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 25 | dnl for more details. |
| 26 | dnl |
| 27 | dnl You should have received copies of the GNU General Public License and the |
| 28 | dnl GNU Lesser General Public License along with the GNU MP Library. If not, |
| 29 | dnl see https://www.gnu.org/licenses/. |
| 30 | |
| 31 | include(`../config.m4') |
| 32 | |
| 33 | |
| 34 | C void mftb_function (unsigned a[2]); |
| 35 | C |
| 36 | |
| 37 | ASM_START() |
| 38 | PROLOGUE(mftb_function) |
| 39 | |
| 40 | C r3 a |
| 41 | |
| 42 | L(again): |
| 43 | mftbu r4 |
| 44 | mftb r5 |
| 45 | mftbu r6 |
| 46 | cmpw cr0, r4, r6 |
| 47 | bne L(again) |
| 48 | |
| 49 | stw r5, 0(r3) |
| 50 | stw r4, 4(r3) |
| 51 | blr |
| 52 | |
| 53 | EPILOGUE() |