* the GNU General Public License.
*
* Copyright 2003, 2004 Develer S.r.l. (http://www.develer.com/)
- * This file is part of DevLib - See README.devlib for information.
+ *
* -->
*
* \brief Common and handy function macros
* \author Bernardo Innocenti <bernie@develer.com>
* \author Giovanni Bajo <rasky@develer.com>
*/
-
-/*#*
- *#* $Log$
- *#* Revision 1.11 2007/02/06 15:22:12 asterix
- *#* Add ROTL and ROTR macros for bit rotating.
- *#*
- *#* Revision 1.10 2006/09/13 18:31:37 bernie
- *#* BV8(), BV16(), BV32(): New macros for CPUs with small word size; SWAP_T(): New macro to support old compilers.
- *#*
- *#* Revision 1.9 2006/07/19 12:56:25 bernie
- *#* Convert to new Doxygen style.
- *#*
- *#* Revision 1.8 2006/03/13 02:06:55 bernie
- *#* ROUND_UP2: Rename from ROUND2.
- *#*
- *#* Revision 1.7 2006/02/20 14:34:58 bernie
- *#* Use portable type checking.
- *#*
- *#* Revision 1.6 2006/02/10 12:36:57 bernie
- *#* Pacify IAR warnings for side-effects.
- *#*
- *#* Revision 1.5 2005/11/04 16:20:01 bernie
- *#* Fix reference to README.devlib in header.
- *#*
- *#* Revision 1.4 2005/07/03 15:19:09 bernie
- *#* Doxygen fix.
- *#*
- *#* Revision 1.3 2005/06/27 21:23:32 bernie
- *#* ROUND_DOWN, ROUND_UP, ROUND_NEAREST: New macros.
- *#*
- *#* Revision 1.2 2005/04/11 19:10:27 bernie
- *#* Include top-level headers from cfg/ subdir.
- *#*
- *#* Revision 1.1 2005/04/11 19:04:13 bernie
- *#* Move top-level headers to cfg/ subdir.
- *#*
- *#* Revision 1.10 2005/01/22 04:19:50 bernie
- *#* Use non-uglified typeof().
- *#*
- *#* Revision 1.9 2004/12/08 08:51:34 bernie
- *#* Add type-generic macros for C++.
- *#*
- *#* Revision 1.8 2004/10/19 07:14:20 bernie
- *#* Add macros to test for specific compiler features.
- *#*
- *#* Revision 1.7 2004/09/20 03:30:45 bernie
- *#* C++ also has variadic macros.
- *#*
- *#* Revision 1.6 2004/09/14 21:02:04 bernie
- *#* SWAP(), MINMAX(): New macros.
- *#*
- *#* Revision 1.5 2004/08/29 21:57:58 bernie
- *#* Move back STATIC_ASSERT() to compiler.h as it's needed in cpu.h;
- *#* iptr_t, const_iptr_t: Replace IPTR macro with a real typedef.
- *#*
- *#* Revision 1.3 2004/08/24 14:13:48 bernie
- *#* Restore a few macros that were lost in the way.
- *#*
- *#* Revision 1.2 2004/08/24 13:32:14 bernie
- *#* PP_CAT(), PP_STRINGIZE(): Move back to compiler.h to break circular dependency between cpu.h/compiler.h/macros.h;
- *#* offsetof(), countof(): Move back to compiler.h to avoid including macros.h almost everywhere;
- *#* Trim CVS log;
- *#* Rename header guards;
- *#* Don't include arch_config.h in compiler.h as it's not needed there.
- *#*
- *#* Revision 1.1 2004/08/14 19:37:57 rasky
- *#* Merge da SC: macros.h, pool.h, BIT_CHANGE, nome dei processi, etc.
- *#*
- *#* Revision 1.4 2004/08/14 18:36:50 rasky
- *#* Doxygen fix e un livello di parentesi aggiuntivi per la macro
- *#*
- *#* Revision 1.3 2004/08/12 20:01:32 rasky
- *#* Aggiunte macro BIT_CHANGE e BIT_CHANGE_BV
- *#*
- *#* Revision 1.2 2004/08/10 21:36:14 rasky
- *#* Aggiunto include macros.h dove serve
- *#* Aggiunta dipendenza da compiler.h in macros.h
- *#*
- *#* Revision 1.1 2004/08/10 21:30:00 rasky
- *#* Estratte le funzioni macro in macros.h
- *#*
- *#*/
-
-#ifndef MACROS_H
-#define MACROS_H
+#ifndef CFG_MACROS_H
+#define CFG_MACROS_H
#include <cfg/compiler.h>
/** Same as BV() but with 8 bit result */
#define BV8(x) ((uint8_t)1<<(x))
-
+/**
+ * Perform an integer division rounding the result to the nearest int value.
+ * \note \a divisor should preferibly be a costant, otherwise this macro generates
+ * 2 division. Also divisor is evaluated twice.
+ */
+#define DIV_ROUND(dividend, divisor) (((dividend) + (divisor) / 2) / (divisor))
/** Round up \a x to an even multiple of the 2's power \a pad. */
#define ROUND_UP2(x, pad) (((x) + ((pad) - 1)) & ~((pad) - 1))
projects / bertos.git / blobdiff