Annotation of src/sys/sys/cdefs.h, Revision 1.95
1.95 ! christos 1: /* $NetBSD: cdefs.h,v 1.94 2012/03/15 00:09:08 christos Exp $ */
1.10 cgd 2:
1.1 cgd 3: /*
1.8 cgd 4: * Copyright (c) 1991, 1993
5: * The Regents of the University of California. All rights reserved.
6: *
7: * This code is derived from software contributed to Berkeley by
8: * Berkeley Software Design, Inc.
1.1 cgd 9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
1.49 agc 18: * 3. Neither the name of the University nor the names of its contributors
1.1 cgd 19: * may be used to endorse or promote products derived from this software
20: * without specific prior written permission.
21: *
22: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32: * SUCH DAMAGE.
33: *
1.25 fvdl 34: * @(#)cdefs.h 8.8 (Berkeley) 1/9/95
1.1 cgd 35: */
36:
1.17 mikel 37: #ifndef _SYS_CDEFS_H_
38: #define _SYS_CDEFS_H_
1.1 cgd 39:
1.32 thorpej 40: /*
41: * Macro to test if we're using a GNU C compiler of a specific vintage
42: * or later, for e.g. features that appeared in a particular version
43: * of GNU C. Usage:
44: *
45: * #if __GNUC_PREREQ__(major, minor)
46: * ...cool feature...
47: * #else
48: * ...delete feature...
49: * #endif
50: */
51: #ifdef __GNUC__
52: #define __GNUC_PREREQ__(x, y) \
53: ((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || \
54: (__GNUC__ > (x)))
55: #else
56: #define __GNUC_PREREQ__(x, y) 0
57: #endif
58:
1.15 jtc 59: #include <machine/cdefs.h>
1.29 thorpej 60: #ifdef __ELF__
61: #include <sys/cdefs_elf.h>
62: #else
63: #include <sys/cdefs_aout.h>
64: #endif
1.15 jtc 65:
1.87 dyoung 66: #ifdef __GNUC__
67: #define __strict_weak_alias(alias,sym) \
68: __unused static __typeof__(alias) *__weak_alias_##alias = &sym; \
69: __weak_alias(alias,sym)
70: #else
71: #define __strict_weak_alias(alias,sym) __weak_alias(alias,sym)
72: #endif
73:
1.1 cgd 74: /*
1.85 joerg 75: * Optional marker for size-optimised MD calling convention.
76: */
77: #ifndef __compactcall
78: #define __compactcall
79: #endif
80:
81: /*
1.1 cgd 82: * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
83: * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
84: * The __CONCAT macro is a bit tricky -- make sure you don't put spaces
85: * in between its arguments. __CONCAT can also concatenate double-quoted
86: * strings produced by the __STRING macro, but this only works with ANSI C.
87: */
1.29 thorpej 88:
89: #define ___STRING(x) __STRING(x)
90: #define ___CONCAT(x,y) __CONCAT(x,y)
91:
1.37 kleink 92: #if __STDC__ || defined(__cplusplus)
1.1 cgd 93: #define __P(protos) protos /* full-blown ANSI C */
94: #define __CONCAT(x,y) x ## y
95: #define __STRING(x) #x
96:
1.8 cgd 97: #define __const const /* define reserved names to standard */
98: #define __signed signed
99: #define __volatile volatile
1.65 ragge 100: #if defined(__cplusplus) || defined(__PCC__)
101: #define __inline inline /* convert to C++/C99 keyword */
1.8 cgd 102: #else
1.35 simonb 103: #if !defined(__GNUC__) && !defined(__lint__)
1.8 cgd 104: #define __inline /* delete GCC keyword */
1.35 simonb 105: #endif /* !__GNUC__ && !__lint__ */
1.8 cgd 106: #endif /* !__cplusplus */
107:
1.1 cgd 108: #else /* !(__STDC__ || __cplusplus) */
109: #define __P(protos) () /* traditional C preprocessor */
110: #define __CONCAT(x,y) x/**/y
111: #define __STRING(x) "x"
112:
1.8 cgd 113: #ifndef __GNUC__
114: #define __const /* delete pseudo-ANSI C keywords */
115: #define __inline
116: #define __signed
117: #define __volatile
118: #endif /* !__GNUC__ */
1.23 thorpej 119:
1.8 cgd 120: /*
121: * In non-ANSI C environments, new programs will want ANSI-only C keywords
122: * deleted from the program and old programs will want them left alone.
123: * Programs using the ANSI C keywords const, inline etc. as normal
124: * identifiers should define -DNO_ANSI_KEYWORDS.
125: */
126: #ifndef NO_ANSI_KEYWORDS
127: #define const __const /* convert ANSI C keywords */
1.1 cgd 128: #define inline __inline
129: #define signed __signed
130: #define volatile __volatile
1.8 cgd 131: #endif /* !NO_ANSI_KEYWORDS */
1.1 cgd 132: #endif /* !(__STDC__ || __cplusplus) */
1.27 mycroft 133:
134: /*
135: * Used for internal auditing of the NetBSD source tree.
136: */
137: #ifdef __AUDIT__
138: #define __aconst __const
139: #else
140: #define __aconst
1.28 kleink 141: #endif
142:
143: /*
1.83 matt 144: * Compile Time Assertion.
145: */
1.84 matt 146: #ifdef __COUNTER__
147: #define __CTASSERT(x) __CTASSERT0(x, __ctassert, __COUNTER__)
148: #else
1.83 matt 149: #define __CTASSERT(x) __CTASSERT0(x, __ctassert, __LINE__)
1.84 matt 150: #endif
1.83 matt 151: #define __CTASSERT0(x, y, z) __CTASSERT1(x, y, z)
152: #define __CTASSERT1(x, y, z) typedef char y ## z[(x) ? 1 : -1];
153:
154: /*
1.54 christos 155: * The following macro is used to remove const cast-away warnings
156: * from gcc -Wcast-qual; it should be used with caution because it
157: * can hide valid errors; in particular most valid uses are in
158: * situations where the API requires it, not to cast away string
1.55 christos 159: * constants. We don't use *intptr_t on purpose here and we are
1.54 christos 160: * explicit about unsigned long so that we don't have additional
161: * dependencies.
162: */
1.55 christos 163: #define __UNCONST(a) ((void *)(unsigned long)(const void *)(a))
1.54 christos 164:
165: /*
1.59 he 166: * The following macro is used to remove the volatile cast-away warnings
167: * from gcc -Wcast-qual; as above it should be used with caution
168: * because it can hide valid errors or warnings. Valid uses include
169: * making it possible to pass a volatile pointer to memset().
170: * For the same reasons as above, we use unsigned long and not intptr_t.
171: */
172: #define __UNVOLATILE(a) ((void *)(unsigned long)(volatile void *)(a))
173:
174: /*
1.28 kleink 175: * GCC2 provides __extension__ to suppress warnings for various GNU C
176: * language extensions under "-ansi -pedantic".
177: */
1.32 thorpej 178: #if !__GNUC_PREREQ__(2, 0)
1.28 kleink 179: #define __extension__ /* delete __extension__ if non-gcc or gcc1 */
1.27 mycroft 180: #endif
1.6 jtc 181:
182: /*
1.8 cgd 183: * GCC1 and some versions of GCC2 declare dead (non-returning) and
184: * pure (no side effects) functions using "volatile" and "const";
185: * unfortunately, these then cause warnings under "-ansi -pedantic".
186: * GCC2 uses a new, peculiar __attribute__((attrs)) style. All of
187: * these work for GNU C++ (modulo a slight glitch in the C++ grammar
188: * in the distribution version of 2.5.5).
1.76 joerg 189: *
190: * GCC defines a pure function as depending only on its arguments and
191: * global variables. Typical examples are strlen and sqrt.
192: *
193: * GCC defines a const function as depending only on its arguments.
194: * Therefore calling a const function again with identical arguments
195: * will always produce the same result.
196: *
197: * Rounding modes for floating point operations are considered global
198: * variables and prevent sqrt from being a const function.
199: *
200: * Calls to const functions can be optimised away and moved around
201: * without limitations.
1.6 jtc 202: */
1.66 joerg 203: #if !__GNUC_PREREQ__(2, 0)
204: #define __attribute__(x)
205: #endif
206:
207: #if __GNUC_PREREQ__(2, 5)
208: #define __dead __attribute__((__noreturn__))
209: #elif defined(__GNUC__)
1.8 cgd 210: #define __dead __volatile
1.66 joerg 211: #else
212: #define __dead
1.6 jtc 213: #endif
214:
1.66 joerg 215: #if __GNUC_PREREQ__(2, 96)
216: #define __pure __attribute__((__pure__))
217: #elif defined(__GNUC__)
218: #define __pure __const
219: #else
1.8 cgd 220: #define __pure
1.43 thorpej 221: #endif
222:
1.76 joerg 223: #if __GNUC_PREREQ__(2, 5)
224: #define __constfunc __attribute__((__const__))
225: #else
226: #define __constfunc
227: #endif
228:
1.67 ad 229: #if __GNUC_PREREQ__(3, 0)
1.69 gmcgarry 230: #define __noinline __attribute__((__noinline__))
1.67 ad 231: #else
232: #define __noinline /* nothing */
233: #endif
234:
1.89 joerg 235: #if __GNUC_PREREQ__(4, 1)
236: #define __returns_twice __attribute__((__returns_twice__))
237: #else
238: #define __returns_twice /* nothing */
239: #endif
240:
1.88 chs 241: #if __GNUC_PREREQ__(4, 5)
242: #define __noclone __attribute__((__noclone__))
243: #else
244: #define __noclone /* nothing */
245: #endif
246:
1.43 thorpej 247: #if __GNUC_PREREQ__(2, 7)
248: #define __unused __attribute__((__unused__))
1.53 he 249: #else
250: #define __unused /* delete */
251: #endif
252:
253: #if __GNUC_PREREQ__(3, 1)
1.52 drochner 254: #define __used __attribute__((__used__))
1.43 thorpej 255: #else
1.62 uwe 256: #define __used __unused
1.43 thorpej 257: #endif
258:
1.82 matt 259: #if __GNUC_PREREQ__(3, 1)
260: #define __noprofile __attribute__((__no_instrument_function__))
261: #else
262: #define __noprofile /* nothing */
263: #endif
264:
1.81 joerg 265: #if defined(__cplusplus)
266: #define __BEGIN_EXTERN_C extern "C" {
267: #define __END_EXTERN_C }
268: #define __static_cast(x,y) static_cast<x>(y)
269: #else
270: #define __BEGIN_EXTERN_C
271: #define __END_EXTERN_C
272: #define __static_cast(x,y) (x)y
273: #endif
274:
1.80 joerg 275: #if __GNUC_PREREQ__(4, 0)
276: # define __dso_public __attribute__((__visibility__("default")))
277: # define __dso_hidden __attribute__((__visibility__("hidden")))
1.81 joerg 278: # define __BEGIN_PUBLIC_DECLS \
279: _Pragma("GCC visibility push(default)") __BEGIN_EXTERN_C
280: # define __END_PUBLIC_DECLS __END_EXTERN_C _Pragma("GCC visibility pop")
281: # define __BEGIN_HIDDEN_DECLS \
282: _Pragma("GCC visibility push(hidden)") __BEGIN_EXTERN_C
283: # define __END_HIDDEN_DECLS __END_EXTERN_C _Pragma("GCC visibility pop")
1.80 joerg 284: #else
285: # define __dso_public
286: # define __dso_hidden
1.81 joerg 287: # define __BEGIN_PUBLIC_DECLS __BEGIN_EXTERN_C
288: # define __END_PUBLIC_DECLS __END_EXTERN_C
289: # define __BEGIN_HIDDEN_DECLS __BEGIN_EXTERN_C
290: # define __END_HIDDEN_DECLS __END_EXTERN_C
1.80 joerg 291: #endif
292:
1.81 joerg 293: #define __BEGIN_DECLS __BEGIN_PUBLIC_DECLS
294: #define __END_DECLS __END_PUBLIC_DECLS
1.80 joerg 295:
1.79 joerg 296: /*
297: * Non-static C99 inline functions are optional bodies. They don't
298: * create global symbols if not used, but can be replaced if desirable.
299: * This differs from the behavior of GCC before version 4.3. The nearest
300: * equivalent for older GCC is `extern inline'. For newer GCC, use the
301: * gnu_inline attribute additionally to get the old behavior.
302: *
303: * For C99 compilers other than GCC, the C99 behavior is expected.
304: */
305: #if defined(__GNUC__) && defined(__GNUC_STDC_INLINE__)
306: #define __c99inline extern __attribute__((__gnu_inline__)) __inline
307: #elif defined(__GNUC__)
308: #define __c99inline extern __inline
309: #elif defined(__STDC_VERSION__)
310: #define __c99inline __inline
311: #endif
312:
1.78 christos 313: #if defined(__lint__)
314: #define __packed __packed
315: #define __aligned(x) /* delete */
316: #define __section(x) /* delete */
317: #elif __GNUC_PREREQ__(2, 7)
1.43 thorpej 318: #define __packed __attribute__((__packed__))
319: #define __aligned(x) __attribute__((__aligned__(x)))
320: #define __section(x) __attribute__((__section__(x)))
1.65 ragge 321: #elif defined(__PCC__)
1.75 reinoud 322: #define __packed _Pragma("packed 1")
1.73 gmcgarry 323: #define __aligned(x) _Pragma("aligned " __STRING(x))
1.68 gmcgarry 324: #define __section(x) _Pragma("section " ## x)
1.86 nonaka 325: #elif defined(_MSC_VER)
326: #define __packed /* ignore */
1.43 thorpej 327: #else
1.44 thorpej 328: #define __packed error: no __packed for this compiler
329: #define __aligned(x) error: no __aligned for this compiler
330: #define __section(x) error: no __section for this compiler
1.39 kleink 331: #endif
332:
333: /*
334: * C99 defines the restrict type qualifier keyword, which was made available
335: * in GCC 2.92.
336: */
1.69 gmcgarry 337: #if defined(__lint__)
338: #define __restrict /* delete __restrict when not supported */
339: #elif __STDC_VERSION__ >= 199901L
1.39 kleink 340: #define __restrict restrict
1.90 joerg 341: #elif __GNUC_PREREQ__(2, 92)
342: #define __restrict __restrict__
343: #else
1.39 kleink 344: #define __restrict /* delete __restrict when not supported */
1.40 kleink 345: #endif
1.42 enami 346:
347: /*
348: * C99 defines __func__ predefined identifier, which was made available
349: * in GCC 2.95.
350: */
351: #if !(__STDC_VERSION__ >= 199901L)
352: #if __GNUC_PREREQ__(2, 6)
353: #define __func__ __PRETTY_FUNCTION__
354: #elif __GNUC_PREREQ__(2, 4)
355: #define __func__ __FUNCTION__
356: #else
357: #define __func__ ""
358: #endif
359: #endif /* !(__STDC_VERSION__ >= 199901L) */
1.18 christos 360:
1.29 thorpej 361: #if defined(_KERNEL)
362: #if defined(NO_KERNEL_RCSIDS)
363: #undef __KERNEL_RCSID
364: #define __KERNEL_RCSID(_n, _s) /* nothing */
365: #endif /* NO_KERNEL_RCSIDS */
366: #endif /* _KERNEL */
1.18 christos 367:
1.72 pooka 368: #if !defined(_STANDALONE) && !defined(_KERNEL)
1.65 ragge 369: #if defined(__GNUC__) || defined(__PCC__)
1.30 itohy 370: #define __RENAME(x) ___RENAME(x)
1.29 thorpej 371: #else
1.23 thorpej 372: #ifdef __lint__
1.29 thorpej 373: #define __RENAME(x) __symbolrename(x)
1.21 christos 374: #else
1.50 grant 375: #error "No function renaming possible"
1.29 thorpej 376: #endif /* __lint__ */
377: #endif /* __GNUC__ */
1.31 cgd 378: #else /* _STANDALONE || _KERNEL */
379: #define __RENAME(x) no renaming in kernel or standalone environment
1.33 thorpej 380: #endif
381:
382: /*
1.51 martin 383: * A barrier to stop the optimizer from moving code or assume live
384: * register values. This is gcc specific, the version is more or less
385: * arbitrary, might work with older compilers.
386: */
387: #if __GNUC_PREREQ__(2, 95)
388: #define __insn_barrier() __asm __volatile("":::"memory")
389: #else
390: #define __insn_barrier() /* */
391: #endif
392:
393: /*
1.33 thorpej 394: * GNU C version 2.96 adds explicit branch prediction so that
395: * the CPU back-end can hint the processor and also so that
396: * code blocks can be reordered such that the predicted path
397: * sees a more linear flow, thus improving cache behavior, etc.
398: *
1.48 perry 399: * The following two macros provide us with a way to use this
1.33 thorpej 400: * compiler feature. Use __predict_true() if you expect the expression
401: * to evaluate to true, and __predict_false() if you expect the
402: * expression to evaluate to false.
403: *
404: * A few notes about usage:
405: *
406: * * Generally, __predict_false() error condition checks (unless
407: * you have some _strong_ reason to do otherwise, in which case
408: * document it), and/or __predict_true() `no-error' condition
409: * checks, assuming you want to optimize for the no-error case.
410: *
1.36 kleink 411: * * Other than that, if you don't know the likelihood of a test
1.33 thorpej 412: * succeeding from empirical or other `hard' evidence, don't
413: * make predictions.
1.34 thorpej 414: *
415: * * These are meant to be used in places that are run `a lot'.
416: * It is wasteful to make predictions in code that is run
417: * seldomly (e.g. at subsystem initialization time) as the
418: * basic block reordering that this affects can often generate
419: * larger code.
1.33 thorpej 420: */
421: #if __GNUC_PREREQ__(2, 96)
1.47 christos 422: #define __predict_true(exp) __builtin_expect((exp) != 0, 1)
423: #define __predict_false(exp) __builtin_expect((exp) != 0, 0)
1.33 thorpej 424: #else
1.47 christos 425: #define __predict_true(exp) (exp)
426: #define __predict_false(exp) (exp)
1.31 cgd 427: #endif
1.45 thorpej 428:
429: /*
1.70 alc 430: * Compiler-dependent macros to declare that functions take printf-like
431: * or scanf-like arguments. They are null except for versions of gcc
432: * that are known to support the features properly (old versions of gcc-2
433: * didn't permit keeping the keywords out of the application namespace).
434: */
435: #if __GNUC_PREREQ__(2, 7)
436: #define __printflike(fmtarg, firstvararg) \
437: __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
438: #define __scanflike(fmtarg, firstvararg) \
439: __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
440: #define __format_arg(fmtarg) __attribute__((__format_arg__ (fmtarg)))
441: #else
442: #define __printflike(fmtarg, firstvararg) /* nothing */
443: #define __scanflike(fmtarg, firstvararg) /* nothing */
444: #define __format_arg(fmtarg) /* nothing */
445: #endif
446:
447: /*
1.45 thorpej 448: * Macros for manipulating "link sets". Link sets are arrays of pointers
449: * to objects, which are gathered up by the linker.
450: *
451: * Object format-specific code has provided us with the following macros:
452: *
453: * __link_set_add_text(set, sym)
454: * Add a reference to the .text symbol `sym' to `set'.
455: *
456: * __link_set_add_rodata(set, sym)
457: * Add a reference to the .rodata symbol `sym' to `set'.
458: *
459: * __link_set_add_data(set, sym)
460: * Add a reference to the .data symbol `sym' to `set'.
461: *
462: * __link_set_add_bss(set, sym)
463: * Add a reference to the .bss symbol `sym' to `set'.
464: *
465: * __link_set_decl(set, ptype)
466: * Provide an extern declaration of the set `set', which
467: * contains an array of the pointer type `ptype'. This
468: * macro must be used by any code which wishes to reference
469: * the elements of a link set.
470: *
471: * __link_set_start(set)
472: * This points to the first slot in the link set.
473: *
474: * __link_set_end(set)
475: * This points to the (non-existent) slot after the last
476: * entry in the link set.
477: *
478: * __link_set_count(set)
479: * Count the number of entries in link set `set'.
480: *
481: * In addition, we provide the following macros for accessing link sets:
482: *
483: * __link_set_foreach(pvar, set)
484: * Iterate over the link set `set'. Because a link set is
485: * an array of pointers, pvar must be declared as "type **pvar",
486: * and the actual entry accessed as "*pvar".
487: *
488: * __link_set_entry(set, idx)
489: * Access the link set entry at index `idx' from set `set'.
490: */
491: #define __link_set_foreach(pvar, set) \
492: for (pvar = __link_set_start(set); pvar < __link_set_end(set); pvar++)
493:
494: #define __link_set_entry(set, idx) (__link_set_begin(set)[idx])
1.1 cgd 495:
1.61 dyoung 496: /*
497: * Return the number of elements in a statically-allocated array,
498: * __x.
499: */
500: #define __arraycount(__x) (sizeof(__x) / sizeof(__x[0]))
501:
502: /* __BIT(n): nth bit, where __BIT(0) == 0x1. */
503: #define __BIT(__n) \
1.74 christos 504: (((uintmax_t)(__n) >= NBBY * sizeof(uintmax_t)) ? 0 : ((uintmax_t)1 << (uintmax_t)(__n)))
1.61 dyoung 505:
506: /* __BITS(m, n): bits m through n, m < n. */
507: #define __BITS(__m, __n) \
508: ((__BIT(MAX((__m), (__n)) + 1) - 1) ^ (__BIT(MIN((__m), (__n))) - 1))
509:
510: /* find least significant bit that is set */
511: #define __LOWEST_SET_BIT(__mask) ((((__mask) - 1) & (__mask)) ^ (__mask))
512:
1.63 dyoung 513: #define __PRIuBIT PRIuMAX
514: #define __PRIuBITS __PRIuBIT
515:
1.61 dyoung 516: #define __PRIxBIT PRIxMAX
517: #define __PRIxBITS __PRIxBIT
518:
1.64 dyoung 519: #define __SHIFTOUT(__x, __mask) (((__x) & (__mask)) / __LOWEST_SET_BIT(__mask))
1.63 dyoung 520: #define __SHIFTIN(__x, __mask) ((__x) * __LOWEST_SET_BIT(__mask))
1.61 dyoung 521: #define __SHIFTOUT_MASK(__mask) __SHIFTOUT((__mask), (__mask))
522:
1.77 christos 523: /*
524: * Only to be used in other headers that are included from both c or c++
525: * NOT to be used in code.
526: */
527: #ifdef __cplusplus
528: #define __CAST(__dt, __st) static_cast<__dt>(__st)
529: #else
530: #define __CAST(__dt, __st) ((__dt)(__st))
531: #endif
532:
1.93 christos 533: #define __type_mask(t) (/*LINTED*/sizeof(t) < sizeof(intmax_t) ? \
534: (~((1ULL << (sizeof(t) * NBBY)) - 1)) : 0ULL)
535:
1.94 christos 536: #ifndef __ASSEMBLER__
1.95 ! christos 537: static __inline long long __zeroll(void) { return 0; }
! 538: static __inline int __negative_p(double x) { return x < 0; }
1.94 christos 539: #else
540: #define __zeroll() (0LL)
541: #define __negative_p(x) ((x) < 0)
542: #endif
1.93 christos 543:
544: #define __type_min_s(t) ((t)((1ULL << (sizeof(t) * NBBY - 1))))
545: #define __type_max_s(t) ((t)~((1ULL << (sizeof(t) * NBBY - 1))))
546: #define __type_min_u(t) ((t)0ULL)
547: #define __type_max_u(t) ((t)~0ULL)
548: #define __type_is_signed(t) (/*LINTED*/__type_min_s(t) + (t)1 < (t)1)
549: #define __type_min(t) (__type_is_signed(t) ? __type_min_s(t) : __type_min_u(t))
550: #define __type_max(t) (__type_is_signed(t) ? __type_max_s(t) : __type_max_u(t))
551:
552:
553: #define __type_fit_u(t, a) (/*LINTED*/sizeof(t) < sizeof(intmax_t) ? \
1.94 christos 554: (((a) & __type_mask(t)) == 0) : !__negative_p(a))
1.93 christos 555:
1.94 christos 556: #define __type_fit_s(t, a) (/*LINTED*/__negative_p(a) ? \
557: ((intmax_t)((a) + __zeroll()) >= (intmax_t)__type_min_s(t)) : \
558: ((intmax_t)((a) + __zeroll()) <= (intmax_t)__type_max_s(t)))
1.93 christos 559:
560: /*
561: * return true if value 'a' fits in type 't'
562: */
563: #define __type_fit(t, a) (__type_is_signed(t) ? \
564: __type_fit_s(t, a) : __type_fit_u(t, a))
565:
1.17 mikel 566: #endif /* !_SYS_CDEFS_H_ */
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