diff options
Diffstat (limited to 'cpukit/score/include/rtems/score/bitfield.h')
-rw-r--r-- | cpukit/score/include/rtems/score/bitfield.h | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/cpukit/score/include/rtems/score/bitfield.h b/cpukit/score/include/rtems/score/bitfield.h deleted file mode 100644 index caa289adf0..0000000000 --- a/cpukit/score/include/rtems/score/bitfield.h +++ /dev/null @@ -1,110 +0,0 @@ -/** - * @file rtems/score/bitfield.h - * - * @brief Bit Field Manipulation Routines - * - * This include file contains all bit field manipulation routines. - */ - -/* - * COPYRIGHT (c) 1989-2006. - * On-Line Applications Research Corporation (OAR). - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.com/license/LICENSE. - */ - -#ifndef _RTEMS_SCORE_BITFIELD_H -#define _RTEMS_SCORE_BITFIELD_H - -/** - * @defgroup ScoreBitfield Bitfield Handler - * - * @ingroup Score - * - * This handler encapsulates functionality that is used to manipulate the - * priority bitfields used to lookup which priority has the highest - * priority ready to execute thread. - */ -/**@{*/ - -#ifdef __cplusplus -extern "C" { -#endif - -#if ( CPU_USE_GENERIC_BITFIELD_DATA == TRUE ) - -/** - * This table is used by the generic bitfield routines to perform - * a highly optimized bit scan without the use of special CPU - * instructions. - */ -#ifndef SCORE_INIT -extern const unsigned char __log2table[256]; -#else -const unsigned char __log2table[256] = { - 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, - 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 -}; -#endif - -#endif - -/** - * @brief Gets the @a _bit_number of the first bit set in the specified value. - * - * This routine returns the @a _bit_number of the first bit set - * in the specified value. The correspondence between @a _bit_number - * and actual bit position is processor dependent. The search for - * the first bit set may run from most to least significant bit - * or vice-versa. - * - * @param[in] _value is the value to bit scan. - * @param[in] _bit_number is the position of the first bit set. - * - * @note This routine is used when the executing thread is removed - * from the ready state and, as a result, its performance has a - * significant impact on the performance of the executive as a whole. - * - * @note This routine must be a macro because if a CPU specific version - * is used it will most likely use inline assembly. - */ -#if ( CPU_USE_GENERIC_BITFIELD_CODE == FALSE ) -#define _Bitfield_Find_first_bit( _value, _bit_number ) \ - _CPU_Bitfield_Find_first_bit( _value, _bit_number ) -#else -#define _Bitfield_Find_first_bit( _value, _bit_number ) \ - { \ - register uint32_t __value = (uint32_t) (_value); \ - register const unsigned char *__p = __log2table; \ - \ - if ( __value < 0x100 ) \ - (_bit_number) = (Priority_bit_map_Control)( __p[ __value ] + 8 ); \ - else \ - (_bit_number) = (Priority_bit_map_Control)( __p[ __value >> 8 ] ); \ - } -#endif - -#ifdef __cplusplus -} -#endif - -/**@}*/ - -#endif -/* end of include file */ |