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 1.23 2004/09/20 03:30:27 bernie
18 *#* Remove vsprintf_P() proto, no longer needed with avr-libc 1.0.4.
20 *#* Revision 1.22 2004/09/14 21:03:04 bernie
21 *#* PURE_FUNC, CONST_FUNC, MUST_CHECK: New function attributes; LIKELY()/UNLIKELY(): Fix for non-integral expressions.
23 *#* Revision 1.21 2004/09/06 21:38:31 bernie
24 *#* Misc documentation and style fixes.
26 *#* Revision 1.20 2004/08/29 21:57:58 bernie
27 *#* Move back STATIC_ASSERT() to compiler.h as it's needed in cpu.h;
28 *#* iptr_t, const_iptr_t: Replace IPTR macro with a real typedef.
30 *#* Revision 1.19 2004/08/25 14:12:08 rasky
31 *#* Aggiornato il comment block dei log RCS
33 *#* Revision 1.18 2004/08/24 16:32:37 bernie
34 *#* Document custom types.
36 *#* Revision 1.17 2004/08/24 13:32:14 bernie
37 *#* PP_CAT(), PP_STRINGIZE(): Move back to compiler.h to break circular dependency between cpu.h/compiler.h/macros.h;
38 *#* offsetof(), countof(): Move back to compiler.h to avoid including macros.h almost everywhere;
40 *#* Rename header guards;
41 *#* Don't include arch_config.h in compiler.h as it's not needed there.
43 *#* Revision 1.16 2004/08/14 19:37:57 rasky
44 *#* Merge da SC: macros.h, pool.h, BIT_CHANGE, nome dei processi, etc.
46 *#* Revision 1.15 2004/08/13 03:23:26 bernie
47 *#* Adjust a few MSVC tweaks from older projects.
49 *#* Revision 1.14 2004/08/10 06:56:29 bernie
50 *#* RESTRICT: New C99-like macro; STATIC_ASSERT: Fix warning for multiple invocation in one file.
52 *#* Revision 1.13 2004/08/02 20:20:29 aleph
53 *#* Merge from project_ks
55 *#* Revision 1.12 2004/08/01 01:21:17 bernie
56 *#* LIKELY(), UNLIKELY(): New compiler-specific macros.
58 *#* Revision 1.11 2004/07/30 14:34:10 rasky
59 *#* Vari fix per documentazione e commenti
60 *#* Aggiunte PP_CATn e STATIC_ASSERT
62 *#* Revision 1.10 2004/07/30 14:15:53 rasky
63 *#* Nuovo supporto unificato per detect della CPU
65 *#* Revision 1.9 2004/07/29 22:57:09 bernie
66 *#* vsprintf(): Remove prototype for backwards compatibility with GCC 3.4; ssize_t: Add definition for inferior compilers.
68 #ifndef DEVLIB_COMPILER_H
69 #define DEVLIB_COMPILER_H
71 #include "cpu_detect.h"
74 #if defined __GNUC__ && defined __GNUC_MINOR__
75 #define GNUC_PREREQ(maj, min) \
76 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
78 #define GNUC_PREREQ(maj, min) 0
81 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
82 #define COMPILER_C99 1
84 #define COMPILER_C99 0
88 /*! Concatenate two different preprocessor tokens (allowing macros to expand) */
89 #define PP_CAT(x,y) PP_CAT__(x,y)
90 #define PP_CAT__(x,y) x ## y
91 #define PP_CAT3(x,y,z) PP_CAT(PP_CAT(x,y),z)
92 #define PP_CAT4(x,y,z,w) PP_CAT(PP_CAT3(x,y,z),w)
93 #define PP_CAT5(x,y,z,w,j) PP_CAT(PP_CAT4(x,y,z,w),j)
95 /*! String-ize a token (allowing macros to expand) */
96 #define PP_STRINGIZE(x) PP_STRINGIZE__(x)
97 #define PP_STRINGIZE__(x) #x
100 #if defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__)
101 #pragma language=extended
102 #define INTERRUPT(x) interrupt [x]
103 #define REGISTER shortad
104 #define INLINE /* unsupported */
106 /* Imported from <longjmp.h>. Unfortunately, we can't just include
107 * this header because it typedefs jmp_buf to be an array of chars.
108 * This would allow the compiler to place the buffer on an odd address.
109 * The CPU _should_ be able to perform word accesses to
110 * unaligned data, but there are *BUGS* in the 80196KC with
111 * some combinations of opcodes and addressing modes. One of
112 * these, "ST SP,[?GR]+" is used in the longjmp() implementation
113 * provided by the IAR compiler ANSI C library. When ?GR contains
114 * an odd address, surprisingly the CPU will copy the high order
115 * byte of the source operand (SP) in the low order byte of the
116 * destination operand (the memory location pointed to by ?GR).
118 * We also need to replace the library setjmp()/longjmp() with
119 * our own versions because the IAR implementation "forgets" to
120 * save the contents of local registers (?LR).
124 void * sp; /* Stack pointer */
125 void * return_addr; /* Return address */
126 int lr[6]; /* 6 local registers */
129 typedef struct _JMP_BUF jmp_buf[1];
131 int setjmp(jmp_buf env);
132 void longjmp(jmp_buf env, int val);
134 /* Fake bool support */
137 typedef unsigned char bool;
139 #elif defined(_MSC_VER) /* Win32 emulation support */
142 #include <time.h> /* for time_t */
144 /* FIXME: I can't remember why exactly this was needed (NdBernie) */
147 /* Fake bool support */
152 #endif /* !__cplusplus */
154 /* These C99 functions are oddly named in MSVCRT32.lib */
155 #define snprintf _snprintf
156 #define vsnprintf _vsnprintf
158 #elif defined(__GNUC__)
161 #define FORMAT(type,fmt,first) __attribute__((__format__(type, fmt, first)))
162 #define NORETURN __attribute__((__noreturn__))
163 #define UNUSED(type,arg) __attribute__((__unused__)) type arg
164 #define INLINE static inline __attribute__((__always_inline__))
165 #define LIKELY(x) __builtin_expect(!!(x), 1)
166 #define UNLIKELY(x) __builtin_expect(!!(x), 0)
167 #define PURE_FUNC __attribute__((pure))
168 #define CONST_FUNC __attribute__((const))
169 #define RESTRICT __restrict__
170 #define MUST_CHECK __attribute__((warn_unused_result))
172 #define DEPRECATED __attribute__((__deprecated__))
177 /* Hack to avoid conflicts with system type */
178 #define sigset_t system_sigset_t
182 #undef system_sigset_t
189 /* Support for harvard architectures */
191 #define PGM_READ_CHAR(s) pgm_read_byte(s)
192 #define PGM_FUNC(x) x ## _P
193 #define PGM_ATTR PROGMEM
198 #elif defined(__MWERKS__) && CPU_DSP56K
205 // CodeWarrior has size_t as built-in type, but does not define this symbol.
206 #define _SIZE_T_DEFINED
209 #error unknown compiler
213 /* A few defaults for missing compiler features. */
215 #define INLINE static inline
218 #define NORETURN /* nothing */
221 #define FORMAT(type,fmt,first) /* nothing */
224 #define DEPRECATED /* nothing */
227 #define UNUSED(type,arg) type arg
230 #define REGISTER /* nothing */
233 #define INTERRUPT(x) ERROR_NOT_IMPLEMENTED
239 #define UNLIKELY(x) x
242 #define PURE_FUNC /* nothing */
245 #define CONST_FUNC /* nothing */
248 #define RESTRICT /* nothing */
251 #define MUST_CHECK /* nothing */
254 /* Support for harvard architectures */
256 #define PSTR /* nothing */
258 #ifndef PGM_READ_CHAR
259 #define PGM_READ_CHAR(s) (*(s))
262 #define PGM_FUNC(x) x
265 #define PGM_ATTR /* nothing */
269 /* Misc definitions */
271 #define NULL (void *)0
278 /* Support for hybrid C/C++ applications. */
280 #define EXTERN_C extern "C"
281 #define EXTERN_C_BEGIN extern "C" {
282 #define EXTERN_C_END }
284 #define EXTERN_C extern
285 #define EXTERN_C_BEGIN /* nothing */
286 #define EXTERN_C_END /* nothing */
291 * Standard type definitions.
292 * These should be in <sys/types.h>, but many compilers lack them.
294 #if !(defined(size_t) || defined(_SIZE_T_DEFINED))
295 typedef unsigned int size_t;
298 #if !(defined(_TIME_T_DEFINED) || defined(__time_t_defined))
300 #endif /* _TIME_T_DEFINED || __time_t_defined */
302 /*! Bulk storage large enough for both pointers or integers */
303 typedef void * iptr_t;
304 typedef const void * const_iptr_t;
305 #define IPTR iptr_t /* OBSOLETE */
307 typedef long utime_t; /*!< Type for time expressed in microseconds */
308 typedef unsigned char sig_t; /*!< Type for signal bits */
309 typedef unsigned char sigset_t; /*!< Type for signal masks */
310 typedef unsigned char page_t; /*!< Type for banked memory pages */
312 #if (defined(_MSC_VER) || defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__))
314 * \name ISO C99 fixed-size types
316 * These should be in <stdint.h>, but many compilers lack them.
319 typedef signed char int8_t;
320 typedef short int int16_t;
321 typedef long int int32_t;
322 typedef unsigned char uint8_t;
323 typedef unsigned short int uint16_t;
324 typedef unsigned long int uint32_t;
326 #elif defined(__GNUC__) && CPU_AVR
327 /* avr-libc is weird... */
328 #include <inttypes.h>
330 /* This is the correct location. */
335 * \name Types for hardware registers.
337 * Only use these types for registers whose contents can
338 * be changed asynchronously by external hardware.
343 /* Registers can be accessed only through 16-bit pointers */
344 typedef volatile uint16_t reg16_t;
346 typedef volatile uint8_t reg8_t;
347 typedef volatile uint16_t reg16_t;
348 typedef volatile uint32_t reg32_t;
353 /* Quasi-ANSI macros */
356 * Return the byte offset of the member \a m in struct \a s.
358 * \note This macro should be defined in "stddef.h" and is sometimes
359 * compiler-specific (g++ has a builtin for it).
361 #define offsetof(s,m) (size_t)&(((s *)0)->m)
365 * Count the number of elements in the static array \a a.
367 * \note This macro is non-standard, but implements a very common idiom
369 #define countof(a) (sizeof(a) / sizeof(*(a)))
372 /*! Issue a compilation error if the \a condition is false */
373 #define STATIC_ASSERT(condition) \
374 extern char PP_CAT(CT_ASSERT___, __LINE__)[(condition) ? 1 : -1]
376 #endif /* DEVLIB_COMPILER_H */