You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
51 lines
1.8 KiB
51 lines
1.8 KiB
/****************************************************************************** |
|
* The MIT License |
|
* |
|
* Copyright (c) 2010 Perry Hung. |
|
* |
|
* 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. |
|
*****************************************************************************/ |
|
|
|
/** |
|
* @file util.h |
|
* @brief Miscellaneous utility macros and procedures. |
|
*/ |
|
#ifndef _UTIL_H_ |
|
#define _UTIL_H_ |
|
|
|
|
|
/* |
|
* Bit manipulation |
|
*/ |
|
|
|
/** 1 << the bit number */ |
|
#define BIT(shift) (1UL << (shift)) |
|
/** Mask shifted left by 'shift' */ |
|
#define BIT_MASK_SHIFT(mask, shift) ((mask) << (shift)) |
|
/** Bits m to n of x */ |
|
#define GET_BITS(x, m, n) ((((uint32)x) << (31 - (n))) >> ((31 - (n)) + (m))) |
|
/** True if v is a power of two (1, 2, 4, 8, ...) */ |
|
#define IS_POWER_OF_TWO(v) ((v) && !((v) & ((v) - 1))) |
|
|
|
|
|
|
|
|
|
#endif
|
|
|