| /* ----------------------------------------------------------------------- * |
| * |
| * Copyright 2010-2011 Intel Corporation; author: H. Peter Anvin |
| * |
| * Permission is hereby granted, free of charge, to any person |
| * obtaining a copy of this software and associated documentation |
| * files (the "Software"), to deal in the Software without |
| * restriction, including without limitation the rights to use, |
| * copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Software, and to permit persons to whom |
| * the Software is furnished to do so, subject to the following |
| * conditions: |
| * |
| * The above copyright notice and this permission notice shall |
| * be included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES |
| * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
| * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * ----------------------------------------------------------------------- */ |
| |
| /* |
| * i386 bitops.h |
| * |
| * Simple bitwise operations |
| */ |
| static inline void set_bit(long __bit, void *__bitmap) |
| { |
| asm volatile("btsl %1,%0" |
| : "+m" (*(unsigned char *)__bitmap) |
| : "Ir" (__bit) : "memory"); |
| } |
| |
| static inline void clr_bit(long __bit, void *__bitmap) |
| { |
| asm volatile("btcl %1,%0" |
| : "+m" (*(unsigned char *)__bitmap) |
| : "Ir" (__bit) : "memory"); |
| } |
| |
| static inline int __purefunc test_bit(long __bit, const void *__bitmap) |
| { |
| unsigned char __r; |
| asm("btl %2,%1; setc %0" |
| : "=qm" (__r) |
| : "m" (*(const unsigned char *)__bitmap), "Ir" (__bit)); |
| return __r; |
| } |