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 1.22 2004/09/14 21:03:04 bernie
19 *#* PURE_FUNC, CONST_FUNC, MUST_CHECK: New function attributes; LIKELY()/UNLIKELY(): Fix for non-integral expressions.
21 *#* Revision 1.21 2004/09/06 21:38:31 bernie
22 *#* Misc documentation and style fixes.
24 *#* Revision 1.20 2004/08/29 21:57:58 bernie
25 *#* Move back STATIC_ASSERT() to compiler.h as it's needed in cpu.h;
26 *#* iptr_t, const_iptr_t: Replace IPTR macro with a real typedef.
28 *#* Revision 1.19 2004/08/25 14:12:08 rasky
29 *#* Aggiornato il comment block dei log RCS
31 *#* Revision 1.18 2004/08/24 16:32:37 bernie
32 *#* Document custom types.
34 *#* Revision 1.17 2004/08/24 13:32:14 bernie
35 *#* PP_CAT(), PP_STRINGIZE(): Move back to compiler.h to break circular dependency between cpu.h/compiler.h/macros.h;
36 *#* offsetof(), countof(): Move back to compiler.h to avoid including macros.h almost everywhere;
38 *#* Rename header guards;
39 *#* Don't include arch_config.h in compiler.h as it's not needed there.
41 *#* Revision 1.16 2004/08/14 19:37:57 rasky
42 *#* Merge da SC: macros.h, pool.h, BIT_CHANGE, nome dei processi, etc.
44 *#* Revision 1.15 2004/08/13 03:23:26 bernie
45 *#* Adjust a few MSVC tweaks from older projects.
47 *#* Revision 1.14 2004/08/10 06:56:29 bernie
48 *#* RESTRICT: New C99-like macro; STATIC_ASSERT: Fix warning for multiple invocation in one file.
50 *#* Revision 1.13 2004/08/02 20:20:29 aleph
51 *#* Merge from project_ks
53 *#* Revision 1.12 2004/08/01 01:21:17 bernie
54 *#* LIKELY(), UNLIKELY(): New compiler-specific macros.
56 *#* Revision 1.11 2004/07/30 14:34:10 rasky
57 *#* Vari fix per documentazione e commenti
58 *#* Aggiunte PP_CATn e STATIC_ASSERT
60 *#* Revision 1.10 2004/07/30 14:15:53 rasky
61 *#* Nuovo supporto unificato per detect della CPU
63 *#* Revision 1.9 2004/07/29 22:57:09 bernie
64 *#* vsprintf(): Remove prototype for backwards compatibility with GCC 3.4; ssize_t: Add definition for inferior compilers.
66 #ifndef DEVLIB_COMPILER_H
67 #define DEVLIB_COMPILER_H
69 #include "cpu_detect.h"
72 #if defined __GNUC__ && defined __GNUC_MINOR__
73 #define GNUC_PREREQ(maj, min) \
74 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
76 #define GNUC_PREREQ(maj, min) 0
79 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
80 #define COMPILER_C99 1
82 #define COMPILER_C99 0
86 /*! Concatenate two different preprocessor tokens (allowing macros to expand) */
87 #define PP_CAT(x,y) PP_CAT__(x,y)
88 #define PP_CAT__(x,y) x ## y
89 #define PP_CAT3(x,y,z) PP_CAT(PP_CAT(x,y),z)
90 #define PP_CAT4(x,y,z,w) PP_CAT(PP_CAT3(x,y,z),w)
91 #define PP_CAT5(x,y,z,w,j) PP_CAT(PP_CAT4(x,y,z,w),j)
93 /*! String-ize a token (allowing macros to expand) */
94 #define PP_STRINGIZE(x) PP_STRINGIZE__(x)
95 #define PP_STRINGIZE__(x) #x
98 #if defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__)
99 #pragma language=extended
100 #define INTERRUPT(x) interrupt [x]
101 #define REGISTER shortad
102 #define INLINE /* unsupported */
104 /* Imported from <longjmp.h>. Unfortunately, we can't just include
105 * this header because it typedefs jmp_buf to be an array of chars.
106 * This would allow the compiler to place the buffer on an odd address.
107 * The CPU _should_ be able to perform word accesses to
108 * unaligned data, but there are *BUGS* in the 80196KC with
109 * some combinations of opcodes and addressing modes. One of
110 * these, "ST SP,[?GR]+" is used in the longjmp() implementation
111 * provided by the IAR compiler ANSI C library. When ?GR contains
112 * an odd address, surprisingly the CPU will copy the high order
113 * byte of the source operand (SP) in the low order byte of the
114 * destination operand (the memory location pointed to by ?GR).
116 * We also need to replace the library setjmp()/longjmp() with
117 * our own versions because the IAR implementation "forgets" to
118 * save the contents of local registers (?LR).
122 void * sp; /* Stack pointer */
123 void * return_addr; /* Return address */
124 int lr[6]; /* 6 local registers */
127 typedef struct _JMP_BUF jmp_buf[1];
129 int setjmp(jmp_buf env);
130 void longjmp(jmp_buf env, int val);
132 /* Fake bool support */
135 typedef unsigned char bool;
137 #elif defined(_MSC_VER) /* Win32 emulation support */
140 #include <time.h> /* for time_t */
142 /* FIXME: I can't remember why exactly this was needed (NdBernie) */
145 /* Fake bool support */
150 #endif /* !__cplusplus */
152 /* These C99 functions are oddly named in MSVCRT32.lib */
153 #define snprintf _snprintf
154 #define vsnprintf _vsnprintf
156 #elif defined(__GNUC__)
159 #define FORMAT(type,fmt,first) __attribute__((__format__(type, fmt, first)))
160 #define NORETURN __attribute__((__noreturn__))
161 #define UNUSED(type,arg) __attribute__((__unused__)) type arg
162 #define INLINE static inline __attribute__((__always_inline__))
163 #define LIKELY(x) __builtin_expect(!!(x), 1)
164 #define UNLIKELY(x) __builtin_expect(!!(x), 0)
165 #define PURE_FUNC __attribute__((pure))
166 #define CONST_FUNC __attribute__((const))
167 #define RESTRICT __restrict__
168 #define MUST_CHECK __attribute__((warn_unused_result))
170 #define DEPRECATED __attribute__((__deprecated__))
175 /* Hack to avoid conflicts with system type */
176 #define sigset_t system_sigset_t
180 #undef system_sigset_t
187 /* Missing printf-family functions in avr-libc/stdio.h */
189 #include <avr/pgmspace.h>
190 int vsprintf_P(char *buf, const char * PROGMEM fmt, va_list ap);
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
201 #elif defined(__MWERKS__) && CPU_DSP56K
208 // CodeWarrior has size_t as built-in type, but does not define this symbol.
209 #define _SIZE_T_DEFINED
212 #error unknown compiler
216 /* A few defaults for missing compiler features. */
218 #define INLINE static inline
221 #define NORETURN /* nothing */
224 #define FORMAT(type,fmt,first) /* nothing */
227 #define DEPRECATED /* nothing */
230 #define UNUSED(type,arg) type arg
233 #define REGISTER /* nothing */
236 #define INTERRUPT(x) ERROR_NOT_IMPLEMENTED
242 #define UNLIKELY(x) x
245 #define PURE_FUNC /* nothing */
248 #define CONST_FUNC /* nothing */
251 #define RESTRICT /* nothing */
254 #define MUST_CHECK /* nothing */
257 /* Support for harvard architectures */
259 #define PSTR /* nothing */
261 #ifndef PGM_READ_CHAR
262 #define PGM_READ_CHAR(s) (*(s))
265 #define PGM_FUNC(x) x
268 #define PGM_ATTR /* nothing */
272 /* Misc definitions */
274 #define NULL (void *)0
281 /* Support for hybrid C/C++ applications. */
283 #define EXTERN_C_BEGIN extern "C" {
284 #define EXTERN_C_END }
286 #define EXTERN_C_BEGIN /* nothing */
287 #define EXTERN_C_END /* nothing */
292 * Standard type definitions.
293 * These should be in <sys/types.h>, but many compilers lack them.
295 #if !(defined(size_t) || defined(_SIZE_T_DEFINED))
296 typedef unsigned int size_t;
299 #if !(defined(_TIME_T_DEFINED) || defined(__time_t_defined))
301 #endif /* _TIME_T_DEFINED || __time_t_defined */
303 /*! Bulk storage large enough for both pointers or integers */
304 typedef void * iptr_t;
305 typedef const void * const_iptr_t;
306 #define IPTR iptr_t /* OBSOLETE */
308 typedef long utime_t; /*!< Type for time expressed in microseconds */
309 typedef unsigned char sig_t; /*!< Type for signal bits */
310 typedef unsigned char sigset_t; /*!< Type for signal masks */
311 typedef unsigned char page_t; /*!< Type for banked memory pages */
313 #if (defined(_MSC_VER) || defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__))
315 * \name ISO C99 fixed-size types
317 * These should be in <stdint.h>, but many compilers lack them.
320 typedef signed char int8_t;
321 typedef short int int16_t;
322 typedef long int int32_t;
323 typedef unsigned char uint8_t;
324 typedef unsigned short int uint16_t;
325 typedef unsigned long int uint32_t;
327 #elif defined(__GNUC__) && CPU_AVR
328 /* avr-libc is weird... */
329 #include <inttypes.h>
331 /* This is the correct location. */
336 * \name Types for hardware registers.
338 * Only use these types for registers whose contents can
339 * be changed asynchronously by external hardware.
344 /* Registers can be accessed only through 16-bit pointers */
345 typedef volatile uint16_t reg16_t;
347 typedef volatile uint8_t reg8_t;
348 typedef volatile uint16_t reg16_t;
349 typedef volatile uint32_t reg32_t;
354 /* Quasi-ANSI macros */
357 * Return the byte offset of the member \a m in struct \a s.
359 * \note This macro should be defined in "stddef.h" and is sometimes
360 * compiler-specific (g++ has a builtin for it).
362 #define offsetof(s,m) (size_t)&(((s *)0)->m)
366 * Count the number of elements in the static array \a a.
368 * \note This macro is non-standard, but implements a very common idiom
370 #define countof(a) (sizeof(a) / sizeof(*(a)))
373 /*! Issue a compilation error if the \a condition is false */
374 #define STATIC_ASSERT(condition) \
375 extern char PP_CAT(CT_ASSERT___, __LINE__)[(condition) ? 1 : -1]
377 #endif /* DEVLIB_COMPILER_H */