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 1.39 2005/01/08 08:49:39 bernie
18 *#* Define PROGMEM on AVR only when not including pgmspace.h.
20 *#* Revision 1.38 2004/12/31 16:41:52 bernie
21 *#* PROGMEM: Define to nothing for non-Harvard processors.
23 *#* Revision 1.37 2004/12/08 09:43:21 bernie
24 *#* Metrowerks supports variadic macros.
26 *#* Revision 1.36 2004/12/08 08:55:54 bernie
27 *#* Rename sigset_t to sigmask_t and time_t to mtime_t, to avoid conflicts with POSIX definitions.
29 *#* Revision 1.35 2004/12/08 07:35:51 bernie
30 *#* Typo in macro name.
32 *#* Revision 1.34 2004/11/28 23:21:33 bernie
33 *#* Use mtime_t instead of overloading ANSI time_t with new semantics.
35 *#* Revision 1.33 2004/11/16 23:09:40 bernie
36 *#* size_t: Add 64bit definitions; time_t: Add 16bit hack for tiny CPUs.
38 *#* Revision 1.32 2004/11/16 22:42:44 bernie
41 *#* Revision 1.31 2004/11/16 22:37:28 bernie
42 *#* IPTR: Remove obsolete definition.
44 *#* Revision 1.30 2004/11/16 22:30:19 bernie
45 *#* Declare fixed-size types before other types.
47 *#* Revision 1.29 2004/11/16 20:34:40 bernie
48 *#* UNUSED_VAR, USED_VAR, USED_FUNC: New macros; UNUSED_ARG: Rename from UNUSED.
50 *#* Revision 1.28 2004/10/21 11:03:52 bernie
53 *#* Revision 1.27 2004/10/21 10:09:40 bernie
54 *#* Remove spurious token in preprocessor directive.
56 *#* Revision 1.26 2004/10/19 08:55:14 bernie
57 *#* UNUSED_FUNC: New function attribute.
59 *#* Revision 1.25 2004/10/19 07:14:20 bernie
60 *#* Add macros to test for specific compiler features.
62 *#* Revision 1.24 2004/10/03 18:35:13 bernie
63 *#* Poison C++ keywords in C programs for better portability.
65 *#* Revision 1.23 2004/09/20 03:30:27 bernie
66 *#* Remove vsprintf_P() proto, no longer needed with avr-libc 1.0.4.
68 *#* Revision 1.22 2004/09/14 21:03:04 bernie
69 *#* PURE_FUNC, CONST_FUNC, MUST_CHECK: New function attributes; LIKELY()/UNLIKELY(): Fix for non-integral expressions.
71 *#* Revision 1.21 2004/09/06 21:38:31 bernie
72 *#* Misc documentation and style fixes.
74 *#* Revision 1.20 2004/08/29 21:57:58 bernie
75 *#* Move back STATIC_ASSERT() to compiler.h as it's needed in cpu.h;
76 *#* iptr_t, const_iptr_t: Replace IPTR macro with a real typedef.
78 *#* Revision 1.19 2004/08/25 14:12:08 rasky
79 *#* Aggiornato il comment block dei log RCS
81 *#* Revision 1.18 2004/08/24 16:32:37 bernie
82 *#* Document custom types.
84 *#* Revision 1.17 2004/08/24 13:32:14 bernie
85 *#* PP_CAT(), PP_STRINGIZE(): Move back to compiler.h to break circular dependency between cpu.h/compiler.h/macros.h;
86 *#* offsetof(), countof(): Move back to compiler.h to avoid including macros.h almost everywhere;
88 *#* Rename header guards;
89 *#* Don't include arch_config.h in compiler.h as it's not needed there.
91 *#* Revision 1.16 2004/08/14 19:37:57 rasky
92 *#* Merge da SC: macros.h, pool.h, BIT_CHANGE, nome dei processi, etc.
94 *#* Revision 1.15 2004/08/13 03:23:26 bernie
95 *#* Adjust a few MSVC tweaks from older projects.
97 *#* Revision 1.14 2004/08/10 06:56:29 bernie
98 *#* RESTRICT: New C99-like macro; STATIC_ASSERT: Fix warning for multiple invocation in one file.
100 *#* Revision 1.13 2004/08/02 20:20:29 aleph
101 *#* Merge from project_ks
103 *#* Revision 1.12 2004/08/01 01:21:17 bernie
104 *#* LIKELY(), UNLIKELY(): New compiler-specific macros.
106 *#* Revision 1.11 2004/07/30 14:34:10 rasky
107 *#* Vari fix per documentazione e commenti
108 *#* Aggiunte PP_CATn e STATIC_ASSERT
110 *#* Revision 1.10 2004/07/30 14:15:53 rasky
111 *#* Nuovo supporto unificato per detect della CPU
113 *#* Revision 1.9 2004/07/29 22:57:09 bernie
114 *#* vsprintf(): Remove prototype for backwards compatibility with GCC 3.4; ssize_t: Add definition for inferior compilers.
116 #ifndef DEVLIB_COMPILER_H
117 #define DEVLIB_COMPILER_H
119 #include "cpu_detect.h"
122 #if defined __GNUC__ && defined __GNUC_MINOR__
123 #define GNUC_PREREQ(maj, min) \
124 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
126 #define GNUC_PREREQ(maj, min) 0
129 /* Some CW versions do not allow enabling C99 from the settings panel. */
130 #if defined(__MWERKS__)
134 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
135 #define COMPILER_C99 1
137 #define COMPILER_C99 0
141 /*! Concatenate two different preprocessor tokens (allowing macros to expand) */
142 #define PP_CAT(x,y) PP_CAT__(x,y)
143 #define PP_CAT__(x,y) x ## y
144 #define PP_CAT3(x,y,z) PP_CAT(PP_CAT(x,y),z)
145 #define PP_CAT4(x,y,z,w) PP_CAT(PP_CAT3(x,y,z),w)
146 #define PP_CAT5(x,y,z,w,j) PP_CAT(PP_CAT4(x,y,z,w),j)
148 /*! String-ize a token (allowing macros to expand) */
149 #define PP_STRINGIZE(x) PP_STRINGIZE__(x)
150 #define PP_STRINGIZE__(x) #x
153 #if defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__)
154 #pragma language=extended
155 #define INTERRUPT(x) interrupt [x]
156 #define REGISTER shortad
157 #define INLINE /* unsupported */
160 * Imported from <longjmp.h>. Unfortunately, we can't just include
161 * this header because it typedefs jmp_buf to be an array of chars.
162 * This would allow the compiler to place the buffer on an odd address.
163 * The CPU _should_ be able to perform word accesses to
164 * unaligned data, but there are *BUGS* in the 80196KC with
165 * some combinations of opcodes and addressing modes. One of
166 * these, "ST SP,[?GR]+" is used in the longjmp() implementation
167 * provided by the IAR compiler ANSI C library. When ?GR contains
168 * an odd address, surprisingly the CPU will copy the high order
169 * byte of the source operand (SP) in the low order byte of the
170 * destination operand (the memory location pointed to by ?GR).
172 * We also need to replace the library setjmp()/longjmp() with
173 * our own versions because the IAR implementation "forgets" to
174 * save the contents of local registers (?LR).
178 void *sp; /* Stack pointer */
179 void *return_addr; /* Return address */
180 int lr[6]; /* 6 local registers */
183 typedef struct _JMP_BUF jmp_buf[1];
185 int setjmp(jmp_buf env);
186 void longjmp(jmp_buf env, int val);
188 /* Fake bool support */
191 typedef unsigned char bool;
193 #elif defined(_MSC_VER) /* Win32 emulation support */
197 /* FIXME: I can't remember why exactly this was needed (NdBernie) */
200 /* MSVC doesn't provide <stdbool.h>. */
205 #endif /* !__cplusplus */
207 /* These C99 functions are oddly named in MSVCRT32.lib */
208 #define snprintf _snprintf
209 #define vsnprintf _vsnprintf
211 #elif defined(__GNUC__)
213 /* Compiler features */
214 #define COMPILER_VARIADIC_MACROS 1 /* Even in C++ */
215 #define COMPILER_TYPEOF 1
216 #define COMPILER_STATEMENT_EXPRESSIONS 1
219 #define FORMAT(type,fmt,first) __attribute__((__format__(type, fmt, first)))
220 #define NORETURN __attribute__((__noreturn__))
221 #define UNUSED_ARG(type,arg) __attribute__((__unused__)) type arg
222 #define UNUSED_VAR(type,name) __attribute__((__unused__)) type name
223 #define USED_VAR(type,name) __attribute__((__used__)) type name
224 #define INLINE static inline __attribute__((__always_inline__))
225 #define LIKELY(x) __builtin_expect(!!(x), 1)
226 #define UNLIKELY(x) __builtin_expect(!!(x), 0)
227 #define PURE_FUNC __attribute__((pure))
228 #define CONST_FUNC __attribute__((const))
229 #define UNUSED_FUNC __attribute__((unused))
230 #define USED_FUNC __attribute__((__used__))
231 #define RESTRICT __restrict__
232 #define MUST_CHECK __attribute__((warn_unused_result))
234 #define DEPRECATED __attribute__((__deprecated__))
248 /* Support for harvard architectures */
250 #include <avr/pgmspace.h>
251 #define PGM_READ_CHAR(s) pgm_read_byte(s)
252 #define PGM_FUNC(x) x ## _P
253 #define PGM_ATTR PROGMEM
255 /* We still need this for prototypes */
256 #define PROGMEM __attribute__((__progmem__))
263 * Disallow some C++ keywords as identifiers in C programs,
264 * for improved portability.
266 #pragma GCC poison new delete class template typename
267 #pragma GCC poison private protected public operator
268 #pragma GCC poison friend mutable using namespace
269 #pragma GCC poison cin cout cerr clog
272 #elif defined(__MWERKS__) && CPU_DSP56K
274 /* Compiler features */
275 #define COMPILER_VARIADIC_MACROS 1
276 #define COMPILER_TYPEOF 1
277 #define COMPILER_STATEMENT_EXPRESSIONS 1
284 // CodeWarrior has size_t as built-in type, but does not define this symbol.
285 #define _SIZE_T_DEFINED
288 #error unknown compiler
292 /* Defaults for compiler extensions. */
295 * \def COMPILER_VARIADIC_MACROS
296 * Support for macros with variable arguments.
298 #ifndef COMPILER_VARIADIC_MACROS
299 #define COMPILER_VARIADIC_MACROS (COMPILER_C99 != 0)
303 * \def COMPILER_TYPEOF
304 * Support for macros with variable arguments.
306 #ifndef COMPILER_TYPEOF
307 #define COMPILER_TYPEOF 0
311 * \def COMPILER_STATEMENT_EXPRESSIONS
312 * Support for macros with variable arguments.
314 #ifndef COMPILER_STATEMENT_EXPRESSIONS
315 #define COMPILER_STATEMENT_EXPRESSIONS 0
318 /* A few defaults for missing compiler features. */
320 #define INLINE static inline
323 #define NORETURN /* nothing */
326 #define FORMAT(type,fmt,first) /* nothing */
329 #define DEPRECATED /* nothing */
332 #define UNUSED_ARG(type,arg) type arg
334 #define UNUSED UNUSED_ARG /* OBSOLETE */
336 #define UNUSED_VAR(type,name) type name
339 #define USED_VAR(type,name) type name
342 #define REGISTER /* nothing */
345 #define PROGMEM /* nothing */
348 #define INTERRUPT(x) ERROR_NOT_IMPLEMENTED
354 #define UNLIKELY(x) x
357 #define PURE_FUNC /* nothing */
360 #define CONST_FUNC /* nothing */
363 #define UNUSED_FUNC /* nothing */
366 #define USED_FUNC /* nothing */
369 #define RESTRICT /* nothing */
372 #define MUST_CHECK /* nothing */
375 /* Support for harvard architectures */
377 #define PSTR /* nothing */
379 #ifndef PGM_READ_CHAR
380 #define PGM_READ_CHAR(s) (*(s))
383 #define PGM_FUNC(x) x
386 #define PGM_ATTR /* nothing */
389 /* Misc definitions */
391 #define NULL (void *)0
398 /* Support for hybrid C/C++ applications. */
400 #define EXTERN_C extern "C"
401 #define EXTERN_C_BEGIN extern "C" {
402 #define EXTERN_C_END }
404 #define EXTERN_C extern
405 #define EXTERN_C_BEGIN /* nothing */
406 #define EXTERN_C_END /* nothing */
410 #if (defined(_MSC_VER) || defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__))
412 * \name ISO C99 fixed-size types
414 * These should be in <stdint.h>, but many compilers lack them.
417 typedef signed char int8_t;
418 typedef short int int16_t;
419 typedef long int int32_t;
420 typedef unsigned char uint8_t;
421 typedef unsigned short int uint16_t;
422 typedef unsigned long int uint32_t;
424 #elif defined(__GNUC__) && CPU_AVR
425 /* avr-libc is weird... */
426 #include <inttypes.h>
428 /* This is the correct location. */
435 * The ATmega8 has a very small Flash, so we can't afford
436 * to link in support routines for 32bit integer arithmetic.
438 typedef int16_t mtime_t; /*!< Type for time expressed in milliseconds. */
439 typedef int16_t utime_t; /*!< Type for time expressed in microseconds. */
440 #define SIZEOF_MTIME_T (16 / CPU_BITS_PER_CHAR)
441 #define SIZEOF_UTIME_T (16 / CPU_BITS_PER_CHAR)
443 typedef int32_t mtime_t; /*!< Type for time expressed in milliseconds. */
444 typedef int32_t utime_t; /*!< Type for time expressed in microseconds. */
445 #define SIZEOF_MTIME_T (32 / CPU_BITS_PER_CHAR)
446 #define SIZEOF_UTIME_T (32 / CPU_BITS_PER_CHAR)
449 /*! Bulk storage large enough for both pointers or integers. */
450 typedef void * iptr_t;
451 typedef const void * const_iptr_t;
453 typedef unsigned char sig_t; /*!< Type for signal bits. */
454 typedef unsigned char sigmask_t; /*!< Type for signal masks. */
455 typedef unsigned char page_t; /*!< Type for banked memory pages. */
459 * \name Standard type definitions.
461 * These should be in <sys/types.h>, but many compilers lack them.
465 #if !(defined(size_t) || defined(_SIZE_T_DEFINED))
466 #if CPU_REG_BITS > 32
468 typedef unsigned long size_t;
469 typedef long ssize_t;
471 /* 32bit or 16bit. */
472 typedef unsigned int size_t;
477 #if !(defined(_TIME_T_DEFINED) || defined(__time_t_defined) || defined(_EMUL))
478 /*! For backwards compatibility. Use mtime_t in new code. */
479 #define time_t mtime_t
480 #define SIZEOF_TIME_T SIZEOF_MTIME_T
482 /* Just a guess, but quite safe. */
483 #define SIZEOF_TIME_T SIZEOF_LONG
484 #endif /* _TIME_T_DEFINED || __time_t_defined */
489 * \name Types for hardware registers.
491 * Only use these types for registers whose contents can
492 * be changed asynchronously by external hardware.
497 /* Registers can be accessed only through 16-bit pointers */
498 typedef volatile uint16_t reg16_t;
500 typedef volatile uint8_t reg8_t;
501 typedef volatile uint16_t reg16_t;
502 typedef volatile uint32_t reg32_t;
507 /* Quasi-ANSI macros */
510 * Return the byte offset of the member \a m in struct \a s.
512 * \note This macro should be defined in "stddef.h" and is sometimes
513 * compiler-specific (g++ has a builtin for it).
515 #define offsetof(s,m) (size_t)&(((s *)0)->m)
519 * Count the number of elements in the static array \a a.
521 * \note This macro is non-standard, but implements a very common idiom
523 #define countof(a) (sizeof(a) / sizeof(*(a)))
526 /*! Issue a compilation error if the \a condition is false */
527 #define STATIC_ASSERT(condition) \
528 UNUSED_VAR(extern char,PP_CAT(CT_ASSERT___, __LINE__)[(condition) ? 1 : -1])
530 #endif /* DEVLIB_COMPILER_H */