130 lines
3.3 KiB
C
130 lines
3.3 KiB
C
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/* GNU C varargs and stdargs support for the DEC Alpha. */
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/* Note: We must use the name __builtin_savregs. GCC attaches special
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significance to that name. In particular, regardless of where in a
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function __builtin_saveregs is called, GCC moves the call up to the
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very start of the function. */
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/* Define __gnuc_va_list. */
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#ifndef __GNUC_VA_LIST
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#define __GNUC_VA_LIST
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/* In VMS, __gnuc_va_list is simply char *; on OSF, it's a structure. */
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#ifdef __VMS__
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typedef char *__gnuc_va_list;
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#else
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typedef struct {
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char *__base; /* Pointer to first integer register. */
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int __offset; /* Byte offset of args so far. */
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} __gnuc_va_list;
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#endif
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#endif /* __GNUC_VA_LIST */
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/* If this is for internal libc use, don't define anything but
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__gnuc_va_list. */
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#if !defined(__GNUC_VA_LIST_1) && (defined (_STDARG_H) || defined (_VARARGS_H))
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#define __GNUC_VA_LIST_1
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#define _VA_LIST
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#define _VA_LIST_
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typedef __gnuc_va_list va_list;
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#if !defined(_STDARG_H)
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/* varargs support */
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#define va_alist __builtin_va_alist
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#define va_dcl int __builtin_va_alist;...
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#ifdef __VMS__
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#define va_start(pvar) ((pvar) = __builtin_saveregs ())
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#else
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#define va_start(pvar) ((pvar) = * (__gnuc_va_list *) __builtin_saveregs ())
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#endif
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#else /* STDARG.H */
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/* ANSI alternative. */
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/* Call __builtin_next_arg even though we aren't using its value, so that
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we can verify that firstarg is correct. */
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#ifdef __VMS__
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#define va_start(pvar, firstarg) \
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(__builtin_next_arg (firstarg), \
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(pvar) = __builtin_saveregs ())
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#else
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#define va_start(pvar, firstarg) \
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(__builtin_next_arg (firstarg), \
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(pvar) = *(__gnuc_va_list *) __builtin_saveregs ())
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#endif
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#endif /* _STDARG_H */
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#define va_end(__va) ((void) 0)
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/* Values returned by __builtin_classify_type. */
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enum {
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__no_type_class = -1,
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__void_type_class,
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__integer_type_class,
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__char_type_class,
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__enumeral_type_class,
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__boolean_type_class,
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__pointer_type_class,
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__reference_type_class,
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__offset_type_class,
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__real_type_class,
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__complex_type_class,
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__function_type_class,
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__method_type_class,
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__record_type_class,
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__union_type_class,
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__array_type_class,
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__string_type_class,
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__set_type_class,
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__file_type_class,
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__lang_type_class
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};
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/* Note that parameters are always aligned at least to a word boundary
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(when passed) regardless of what GCC's __alignof__ operator says. */
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/* Avoid errors if compiling GCC v2 with GCC v1. */
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#if __GNUC__ == 1
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#define __extension__
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#endif
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/* Get the size of a type in bytes, rounded up to an integral number
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of words. */
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#define __va_tsize(__type) \
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(((sizeof (__type) + __extension__ sizeof (long long) - 1) \
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/ __extension__ sizeof (long long)) * __extension__ sizeof (long long))
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#ifdef __VMS__
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#define va_arg(__va, __type) \
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(*(((__va) += __va_tsize (__type)), \
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(__type *)(void *)((__va) - __va_tsize (__type))))
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#else
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#define va_arg(__va, __type) \
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(*(((__va).__offset += __va_tsize (__type)), \
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(__type *)(void *)((__va).__base + (__va).__offset \
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- (((__builtin_classify_type (* (__type *) 0) \
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== __real_type_class) && (__va).__offset <= (6 * 8)) \
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? (6 * 8) + 8 : __va_tsize (__type)))))
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#endif
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/* Copy __gnuc_va_list into another variable of this type. */
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#define __va_copy(dest, src) (dest) = (src)
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#endif /* __GNUC_VA_LIST_1 */
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