4 * Copyright 2003, 2004 Develer S.r.l. (http://www.develer.com/)
5 * Copyright 2001, 2002, 2003 Bernardo Innocenti <bernie@codewiz.org>
6 * This file is part of DevLib - See devlib/README for information.
11 * \author Bernardo Innocenti <bernie@develer.com>
13 * \brief Additional support macros for compiler independance
18 * Revision 1.13 2004/08/02 20:20:29 aleph
19 * Merge from project_ks
21 * Revision 1.12 2004/08/01 01:21:17 bernie
22 * LIKELY(), UNLIKELY(): New compiler-specific macros.
24 * Revision 1.11 2004/07/30 14:34:10 rasky
25 * Vari fix per documentazione e commenti
26 * Aggiunte PP_CATn e STATIC_ASSERT
28 * Revision 1.10 2004/07/30 14:15:53 rasky
29 * Nuovo supporto unificato per detect della CPU
31 * Revision 1.9 2004/07/29 22:57:09 bernie
32 * vsprintf(): Remove prototype for backwards compatibility with GCC 3.4; ssize_t: Add definition for inferior compilers.
34 * Revision 1.8 2004/07/20 23:43:39 bernie
35 * Use attribute((always_inline)) to force inlining. This fixes the much
36 * hated need of redundant prototypes for inline functions.
38 * Revision 1.7 2004/07/20 23:26:48 bernie
39 * Fix two errors introduced by previous commit.
41 * Revision 1.6 2004/07/20 23:12:43 bernie
42 * *** empty log message ***
44 * Revision 1.5 2004/07/20 17:08:03 bernie
45 * Cleanup documentation
47 * Revision 1.4 2004/06/27 15:20:26 aleph
48 * Change UNUSED() macro to accept two arguments: type and name;
49 * Add macro GNUC_PREREQ to detect GCC version during build;
50 * Some spacing cleanups and typo fix
52 * Revision 1.3 2004/06/06 18:00:39 bernie
53 * PP_CAT(): New macro.
55 * Revision 1.2 2004/06/03 11:27:09 bernie
56 * Add dual-license information.
58 * Revision 1.1 2004/05/23 17:48:35 bernie
59 * Add top-level files.
65 #include "arch_config.h"
66 #include "cpu_detect.h"
69 #if defined __GNUC__ && defined __GNUC_MINOR__
70 #define GNUC_PREREQ(maj, min) \
71 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
73 #define GNUC_PREREQ(maj, min) 0
76 #if defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__)
77 #pragma language=extended
78 #define INTERRUPT(x) interrupt [x]
79 #define REGISTER shortad
80 #define INLINE /* unsupported */
82 /* Imported from <longjmp.h>. Unfortunately, we can't just include
83 * this header because it typedefs jmp_buf to be an array of chars.
84 * This would allow the compiler to place the buffer on an odd address.
85 * The CPU _should_ be able to perform word accesses to
86 * unaligned data, but there are *BUGS* in the 80196KC with
87 * some combinations of opcodes and addressing modes. One of
88 * these, "ST SP,[?GR]+" is used in the longjmp() implementation
89 * provided by the IAR compiler ANSI C library. When ?GR contains
90 * an odd address, surprisingly the CPU will copy the high order
91 * byte of the source operand (SP) in the low order byte of the
92 * destination operand (the memory location pointed to by ?GR).
94 * We also need to replace the library setjmp()/longjmp() with
95 * our own versions because the IAR implementation "forgets" to
96 * save the contents of local registers (?LR).
100 void * sp; /* Stack pointer */
101 void * return_addr; /* Return address */
102 int lr[6]; /* 6 local registers */
105 typedef struct _JMP_BUF jmp_buf[1];
107 int setjmp(jmp_buf env);
108 void longjmp(jmp_buf env, int val);
110 /* Fake bool support */
113 typedef unsigned char bool;
115 #elif defined(_MSC_VER) /* Win32 emulation support */
118 #include <time.h> /* for time_t */
121 /* Ouch, ReleaseSemaphore() conflicts with a WIN32 call ;-( */
122 #define ReleaseSemaphore KReleaseSemaphore
124 /* Fake bool support */
129 #endif /* !__cplusplus */
131 #elif defined(__GNUC__)
134 #define FORMAT(type,fmt,first) __attribute__((__format__(type, fmt, first)))
135 #define NORETURN __attribute__((__noreturn__))
136 #define UNUSED(type,arg) __attribute__((__unused__)) type arg
137 #define INLINE static inline __attribute__((__always_inline__))
138 #define LIKELY(x) __builtin_expect((x), 1)
139 #define UNLIKELY(x) __builtin_expect((x), 0)
141 #define DEPRECATED __attribute__((__deprecated__))
146 /* hack to avoid conflicts with system type */
147 #define sigset_t system_sigset_t
151 #undef system_sigset_t
158 /* Missing printf-family functions in avr-libc/stdio.h */
160 #include <avr/pgmspace.h>
161 int vsprintf_P(char *buf, const char * PROGMEM fmt, va_list ap);
163 /* Support for harvard architectures */
165 #define PGM_READ_CHAR(s) pgm_read_byte(s)
166 #define PGM_FUNC(x) x ## _P
167 #define PGM_ATTR PROGMEM
172 #elif defined(__MWERKS__) && CPU_DSP56K
179 // CodeWarrior has size_t as built-in type, but does not define this symbol.
180 #define _SIZE_T_DEFINED
183 #error unknown compiler
187 /* A few defaults for missing compiler features. */
189 #define INLINE static inline
192 #define NORETURN /* nothing */
195 #define FORMAT(type,fmt,first) /* nothing */
198 #define DEPRECATED /* nothing */
201 #define UNUSED(type,arg) type arg
204 #define REGISTER /* nothing */
207 #define INTERRUPT(x) ERROR_NOT_IMPLEMENTED
213 #define UNLIKELY(x) x
216 /* Support for harvard architectures */
218 #define PSTR /* nothing */
220 #ifndef PGM_READ_CHAR
221 #define PGM_READ_CHAR(s) (*(s))
224 #define PGM_FUNC(x) x
227 #define PGM_ATTR /* nothing */
231 /* Misc definitions */
240 /* Support for hybrid C/C++ applications. */
242 #define EXTERN_C_BEGIN extern "C" {
243 #define EXTERN_C_END }
245 #define EXTERN_C_BEGIN /* nothing */
246 #define EXTERN_C_END /* nothing */
250 /* Quasi-ANSI macros */
252 /*! offsetof(s,m) - Return the byte offset of the member \a m in struct \a s */
253 #define offsetof(s,m) (size_t)&(((s *)0)->m)
256 /*! Count the number of elements in the static array \a a */
257 #define countof(a) (sizeof(a) / sizeof(*(a)))
264 __typeof__(n) _n = (n); \
265 (_n < 0) ? -_n : _n; \
267 #define MIN(a,b) ({ \
268 __typeof__(a) _a = (a); \
269 __typeof__(b) _b = (b); \
270 (void)(&_a == &_b); /* ensure same type */ \
271 (_a < _b) ? _a : _b; \
273 #define MAX(a,b) ({ \
274 __typeof__(a) _a = (a); \
275 __typeof__(b) _b = (b); \
276 (void)(&_a == &_b); /* ensure same type */ \
277 (_a > _b) ? _a : _b; \
280 /* Buggy macros for inferior compilers */
281 #define ABS(a) (((a) < 0) ? -(a) : (a))
282 #define MIN(a,b) (((a) < (b)) ? (a) : (b))
283 #define MAX(a,b) (((a) > (b)) ? (a) : (b))
287 /*! Convert a bit value to a binary flag */
288 #define BV(x) (1<<(x))
291 /*! Round up \a x to an even multiple of the 2's power \a pad */
292 #define ROUND2(x, pad) (((x) + ((pad) - 1)) & ~((pad) - 1))
294 /*! Calculate a compile-time log2 for a uint8_t */
295 #define UINT8_LOG2(x) \
302 ((x) < 128 ? 6 : 7)))))))
304 /*! Calculate a compile-time log2 for a uint16_t */
305 #define UINT16_LOG2(x) \
306 ((x < 256) ? UINT8_LOG2(x) : UINT8_LOG2((x) >> 8) + 8)
308 /*! Calculate a compile-time log2 for a uint32_t */
309 #define UINT32_LOG2(x) \
310 ((x < 65536UL) ? UINT16_LOG2(x) : UINT16_LOG2((x) >> 16) + 16)
312 /*! Concatenate two different preprocessor tokens (allowing macros to expand) */
313 #define PP_CAT(x,y) PP_CAT__(x,y)
314 #define PP_CAT__(x,y) x ## y
315 #define PP_CAT3(x,y,z) PP_CAT(PP_CAT(x,y),z)
316 #define PP_CAT4(x,y,z,w) PP_CAT(PP_CAT3(x,y,z),w)
317 #define PP_CAT5(x,y,z,w,j) PP_CAT(PP_CAT4(x,y,z,w),j)
319 /*! String-ize a token (allowing macros to expand) */
320 #define PP_STRINGIZE(x) PP_STRINGIZE__(x)
321 #define PP_STRINGIZE__(x) #x
323 /*! Issue a compilation error if the \a condition is false */
324 #define STATIC_ASSERT(condition) \
325 extern char CT_ASSERT___[(condition) ? 1 : -1]
328 * Standard type definitions
329 * These should be in <sys/types.h>, but many compilers lack them.
331 #if !(defined(size_t) || defined(_SIZE_T_DEFINED))
332 typedef unsigned int size_t;
335 #if !(defined(_TIME_T_DEFINED) || defined(__time_t_defined))
337 #endif /* _TIME_T_DEFINED || __time_t_defined */
339 /*! Storage for pointers and integers */
342 typedef long utime_t;
343 typedef unsigned char sig_t;
344 typedef unsigned char sigset_t;
345 typedef unsigned char page_t;
347 #if (defined(_MSC_VER) || defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__))
349 * ISO C99 fixed-size types
350 * These should be in <stdint.h>, but many compilers lack them.
352 typedef signed char int8_t;
353 typedef short int int16_t;
354 typedef long int int32_t;
355 typedef unsigned char uint8_t;
356 typedef unsigned short int uint16_t;
357 typedef unsigned long int uint32_t;
358 #elif defined(__AVR__)
359 /* TODO: should this detect GCC+AVR combo, or just CPU_AVR? */
360 /* avr-libc is weird... */
361 #include <inttypes.h>
363 /* This is the correct location. */
368 * \name Types for hardware registers.
370 * Only use these types for registers whose contents can
371 * be changed asynchronously by external hardware.
376 /* Registers can be accessed only through 16-bit pointers */
377 typedef volatile uint16_t reg16_t;
379 typedef volatile uint8_t reg8_t;
380 typedef volatile uint16_t reg16_t;
381 typedef volatile uint32_t reg32_t;
385 #endif /* COMPILER_H */