| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /* Cloned for uClibc by Paul Mundt, December 2003 */ |
| 2 | /* Modified by SuperH, Inc. September 2003 */ |
| 3 | |
| 4 | /* Machine-dependent pthreads configuration and inline functions. |
| 5 | SH5 version. |
| 6 | Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc. |
| 7 | This file is part of the GNU C Library. |
| 8 | Contributed by Niibe Yutaka <gniibe@m17n.org>. |
| 9 | |
| 10 | The GNU C Library is free software; you can redistribute it and/or |
| 11 | modify it under the terms of the GNU Library General Public License as |
| 12 | published by the Free Software Foundation; either version 2 of the |
| 13 | License, or (at your option) any later version. |
| 14 | |
| 15 | The GNU C Library is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | Library General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU Library General Public |
| 21 | License along with the GNU C Library; see the file COPYING.LIB. If not, |
| 22 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | Boston, MA 02111-1307, USA. */ |
| 24 | |
| 25 | #include "pt-machine.h" |
| 26 | |
| 27 | /* Spinlock implementation; required. */ |
| 28 | |
| 29 | /* The SH5 does not have a suitable test-and-set instruction (SWAP only |
| 30 | operates on an aligned quad word). So we use the SH4 version instead. |
| 31 | This must be seperately compiled in SHcompact mode, so it cannot be |
| 32 | inline. */ |
| 33 | |
| 34 | long int testandset (int *spinlock) |
| 35 | { |
| 36 | int ret; |
| 37 | |
| 38 | __asm__ __volatile__( |
| 39 | "tas.b @%1\n\t" |
| 40 | "movt %0" |
| 41 | : "=r" (ret) |
| 42 | : "r" (spinlock) |
| 43 | : "memory", "cc"); |
| 44 | |
| 45 | return (ret == 0); |
| 46 | } |
| 47 | |