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.
9 * \brief Additional support macros for compiler independance
12 * \author Bernardo Innocenti <bernie@develer.com>
17 *#* Revision 1.24 2004/10/03 18:35:13 bernie
18 *#* Poison C++ keywords in C programs for better portability.
20 *#* Revision 1.23 2004/09/20 03:30:27 bernie
21 *#* Remove vsprintf_P() proto, no longer needed with avr-libc 1.0.4.
23 *#* Revision 1.22 2004/09/14 21:03:04 bernie
24 *#* PURE_FUNC, CONST_FUNC, MUST_CHECK: New function attributes; LIKELY()/UNLIKELY(): Fix for non-integral expressions.
26 *#* Revision 1.21 2004/09/06 21:38:31 bernie
27 *#* Misc documentation and style fixes.
29 *#* Revision 1.20 2004/08/29 21:57:58 bernie
30 *#* Move back STATIC_ASSERT() to compiler.h as it's needed in cpu.h;
31 *#* iptr_t, const_iptr_t: Replace IPTR macro with a real typedef.
33 *#* Revision 1.19 2004/08/25 14:12:08 rasky
34 *#* Aggiornato il comment block dei log RCS
36 *#* Revision 1.18 2004/08/24 16:32:37 bernie
37 *#* Document custom types.
39 *#* Revision 1.17 2004/08/24 13:32:14 bernie
40 *#* PP_CAT(), PP_STRINGIZE(): Move back to compiler.h to break circular dependency between cpu.h/compiler.h/macros.h;
41 *#* offsetof(), countof(): Move back to compiler.h to avoid including macros.h almost everywhere;
43 *#* Rename header guards;
44 *#* Don't include arch_config.h in compiler.h as it's not needed there.
46 *#* Revision 1.16 2004/08/14 19:37:57 rasky
47 *#* Merge da SC: macros.h, pool.h, BIT_CHANGE, nome dei processi, etc.
49 *#* Revision 1.15 2004/08/13 03:23:26 bernie
50 *#* Adjust a few MSVC tweaks from older projects.
52 *#* Revision 1.14 2004/08/10 06:56:29 bernie
53 *#* RESTRICT: New C99-like macro; STATIC_ASSERT: Fix warning for multiple invocation in one file.
55 *#* Revision 1.13 2004/08/02 20:20:29 aleph
56 *#* Merge from project_ks
58 *#* Revision 1.12 2004/08/01 01:21:17 bernie
59 *#* LIKELY(), UNLIKELY(): New compiler-specific macros.
61 *#* Revision 1.11 2004/07/30 14:34:10 rasky
62 *#* Vari fix per documentazione e commenti
63 *#* Aggiunte PP_CATn e STATIC_ASSERT
65 *#* Revision 1.10 2004/07/30 14:15:53 rasky
66 *#* Nuovo supporto unificato per detect della CPU
68 *#* Revision 1.9 2004/07/29 22:57:09 bernie
69 *#* vsprintf(): Remove prototype for backwards compatibility with GCC 3.4; ssize_t: Add definition for inferior compilers.
71 #ifndef DEVLIB_COMPILER_H
72 #define DEVLIB_COMPILER_H
74 #include "cpu_detect.h"
77 #if defined __GNUC__ && defined __GNUC_MINOR__
78 #define GNUC_PREREQ(maj, min) \
79 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
81 #define GNUC_PREREQ(maj, min) 0
84 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
85 #define COMPILER_C99 1
87 #define COMPILER_C99 0
91 /*! Concatenate two different preprocessor tokens (allowing macros to expand) */
92 #define PP_CAT(x,y) PP_CAT__(x,y)
93 #define PP_CAT__(x,y) x ## y
94 #define PP_CAT3(x,y,z) PP_CAT(PP_CAT(x,y),z)
95 #define PP_CAT4(x,y,z,w) PP_CAT(PP_CAT3(x,y,z),w)
96 #define PP_CAT5(x,y,z,w,j) PP_CAT(PP_CAT4(x,y,z,w),j)
98 /*! String-ize a token (allowing macros to expand) */
99 #define PP_STRINGIZE(x) PP_STRINGIZE__(x)
100 #define PP_STRINGIZE__(x) #x
103 #if defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__)
104 #pragma language=extended
105 #define INTERRUPT(x) interrupt [x]
106 #define REGISTER shortad
107 #define INLINE /* unsupported */
109 /* Imported from <longjmp.h>. Unfortunately, we can't just include
110 * this header because it typedefs jmp_buf to be an array of chars.
111 * This would allow the compiler to place the buffer on an odd address.
112 * The CPU _should_ be able to perform word accesses to
113 * unaligned data, but there are *BUGS* in the 80196KC with
114 * some combinations of opcodes and addressing modes. One of
115 * these, "ST SP,[?GR]+" is used in the longjmp() implementation
116 * provided by the IAR compiler ANSI C library. When ?GR contains
117 * an odd address, surprisingly the CPU will copy the high order
118 * byte of the source operand (SP) in the low order byte of the
119 * destination operand (the memory location pointed to by ?GR).
121 * We also need to replace the library setjmp()/longjmp() with
122 * our own versions because the IAR implementation "forgets" to
123 * save the contents of local registers (?LR).
127 void * sp; /* Stack pointer */
128 void * return_addr; /* Return address */
129 int lr[6]; /* 6 local registers */
132 typedef struct _JMP_BUF jmp_buf[1];
134 int setjmp(jmp_buf env);
135 void longjmp(jmp_buf env, int val);
137 /* Fake bool support */
140 typedef unsigned char bool;
142 #elif defined(_MSC_VER) /* Win32 emulation support */
145 #include <time.h> /* for time_t */
147 /* FIXME: I can't remember why exactly this was needed (NdBernie) */
150 /* Fake bool support */
155 #endif /* !__cplusplus */
157 /* These C99 functions are oddly named in MSVCRT32.lib */
158 #define snprintf _snprintf
159 #define vsnprintf _vsnprintf
161 #elif defined(__GNUC__)
164 #define FORMAT(type,fmt,first) __attribute__((__format__(type, fmt, first)))
165 #define NORETURN __attribute__((__noreturn__))
166 #define UNUSED(type,arg) __attribute__((__unused__)) type arg
167 #define INLINE static inline __attribute__((__always_inline__))
168 #define LIKELY(x) __builtin_expect(!!(x), 1)
169 #define UNLIKELY(x) __builtin_expect(!!(x), 0)
170 #define PURE_FUNC __attribute__((pure))
171 #define CONST_FUNC __attribute__((const))
172 #define RESTRICT __restrict__
173 #define MUST_CHECK __attribute__((warn_unused_result))
175 #define DEPRECATED __attribute__((__deprecated__))
180 /* Hack to avoid conflicts with system type */
181 #define sigset_t system_sigset_t
185 #undef system_sigset_t
192 /* Support for harvard architectures */
194 #define PGM_READ_CHAR(s) pgm_read_byte(s)
195 #define PGM_FUNC(x) x ## _P
196 #define PGM_ATTR PROGMEM
203 * Disallow some C++ keywords as identifiers in C programs,
204 * for improved portability.
206 #pragma GCC poison new delete class template typename
207 #pragma GCC poison private protected public operator
208 #pragma GCC poison friend mutable using namespace
209 #pragma GCC poison cin cout cerr clog
212 #elif defined(__MWERKS__) && CPU_DSP56K
219 // CodeWarrior has size_t as built-in type, but does not define this symbol.
220 #define _SIZE_T_DEFINED
223 #error unknown compiler
227 /* A few defaults for missing compiler features. */
229 #define INLINE static inline
232 #define NORETURN /* nothing */
235 #define FORMAT(type,fmt,first) /* nothing */
238 #define DEPRECATED /* nothing */
241 #define UNUSED(type,arg) type arg
244 #define REGISTER /* nothing */
247 #define INTERRUPT(x) ERROR_NOT_IMPLEMENTED
253 #define UNLIKELY(x) x
256 #define PURE_FUNC /* nothing */
259 #define CONST_FUNC /* nothing */
262 #define RESTRICT /* nothing */
265 #define MUST_CHECK /* nothing */
268 /* Support for harvard architectures */
270 #define PSTR /* nothing */
272 #ifndef PGM_READ_CHAR
273 #define PGM_READ_CHAR(s) (*(s))
276 #define PGM_FUNC(x) x
279 #define PGM_ATTR /* nothing */
283 /* Misc definitions */
285 #define NULL (void *)0
292 /* Support for hybrid C/C++ applications. */
294 #define EXTERN_C extern "C"
295 #define EXTERN_C_BEGIN extern "C" {
296 #define EXTERN_C_END }
298 #define EXTERN_C extern
299 #define EXTERN_C_BEGIN /* nothing */
300 #define EXTERN_C_END /* nothing */
305 * Standard type definitions.
306 * These should be in <sys/types.h>, but many compilers lack them.
308 #if !(defined(size_t) || defined(_SIZE_T_DEFINED))
309 typedef unsigned int size_t;
312 #if !(defined(_TIME_T_DEFINED) || defined(__time_t_defined))
314 #endif /* _TIME_T_DEFINED || __time_t_defined */
316 /*! Bulk storage large enough for both pointers or integers */
317 typedef void * iptr_t;
318 typedef const void * const_iptr_t;
319 #define IPTR iptr_t /* OBSOLETE */
321 typedef long utime_t; /*!< Type for time expressed in microseconds */
322 typedef unsigned char sig_t; /*!< Type for signal bits */
323 typedef unsigned char sigset_t; /*!< Type for signal masks */
324 typedef unsigned char page_t; /*!< Type for banked memory pages */
326 #if (defined(_MSC_VER) || defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__))
328 * \name ISO C99 fixed-size types
330 * These should be in <stdint.h>, but many compilers lack them.
333 typedef signed char int8_t;
334 typedef short int int16_t;
335 typedef long int int32_t;
336 typedef unsigned char uint8_t;
337 typedef unsigned short int uint16_t;
338 typedef unsigned long int uint32_t;
340 #elif defined(__GNUC__) && CPU_AVR
341 /* avr-libc is weird... */
342 #include <inttypes.h>
344 /* This is the correct location. */
349 * \name Types for hardware registers.
351 * Only use these types for registers whose contents can
352 * be changed asynchronously by external hardware.
357 /* Registers can be accessed only through 16-bit pointers */
358 typedef volatile uint16_t reg16_t;
360 typedef volatile uint8_t reg8_t;
361 typedef volatile uint16_t reg16_t;
362 typedef volatile uint32_t reg32_t;
367 /* Quasi-ANSI macros */
370 * Return the byte offset of the member \a m in struct \a s.
372 * \note This macro should be defined in "stddef.h" and is sometimes
373 * compiler-specific (g++ has a builtin for it).
375 #define offsetof(s,m) (size_t)&(((s *)0)->m)
379 * Count the number of elements in the static array \a a.
381 * \note This macro is non-standard, but implements a very common idiom
383 #define countof(a) (sizeof(a) / sizeof(*(a)))
386 /*! Issue a compilation error if the \a condition is false */
387 #define STATIC_ASSERT(condition) \
388 extern char PP_CAT(CT_ASSERT___, __LINE__)[(condition) ? 1 : -1]
390 #endif /* DEVLIB_COMPILER_H */