77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
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/* GNU C varargs support for the Intel 80960. */
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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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/* The first element is the address of the first argument.
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The second element is the number of bytes skipped past so far. */
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typedef unsigned __gnuc_va_list[2];
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#endif /* not __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 (_STDARG_H) || defined (_VARARGS_H)
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/* In GCC version 2, we want an ellipsis at the end of the declaration
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of the argument list. GCC version 1 can't parse it. */
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#if __GNUC__ > 1
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#define __va_ellipsis ...
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#else
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#define __va_ellipsis
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#endif
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/* The stack size of the type t. */
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#define __vsiz(T) (((sizeof (T) + 3) / 4) * 4)
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/* The stack alignment of the type t. */
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#define __vali(T) (__alignof__ (T) >= 4 ? __alignof__ (T) : 4)
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/* The offset of the next stack argument after one of type t at offset i. */
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#define __vpad(I, T) ((((I) + __vali (T) - 1) / __vali (T)) \
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* __vali (T) + __vsiz (T))
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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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#ifdef _STDARG_H
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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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#define va_start(AP, LASTARG) \
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__extension__ \
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({ __builtin_next_arg (LASTARG); \
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__asm__ ("st g14,%0" : "=m" (*(AP))); \
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(AP)[1] = (__builtin_args_info (0) + __builtin_args_info (1)) * 4; })
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#else
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#define va_alist __builtin_va_alist
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#define va_dcl char *__builtin_va_alist; __va_ellipsis
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#define va_start(AP) \
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__extension__ \
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({ __asm__ ("st g14,%0" : "=m" (*(AP))); \
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(AP)[1] = (__builtin_args_info (0) + __builtin_args_info (1)) * 4; })
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#endif
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/* We cast to void * and then to TYPE * because this avoids
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a warning about increasing the alignment requirement. */
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#define va_arg(AP, T) \
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( \
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( \
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((AP)[1] <= 48 && (__vpad ((AP)[1], T) > 48 || __vsiz (T) > 16)) \
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? ((AP)[1] = 48 + __vsiz (T)) \
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: ((AP)[1] = __vpad ((AP)[1], T)) \
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), \
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\
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*((T *) (void *) ((char *) *(AP) + (AP)[1] - __vsiz (T))) \
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)
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#ifndef va_end
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void va_end (__gnuc_va_list); /* Defined in libgcc.a */
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#endif
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#define va_end(AP) ((void *)0)
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#endif /* defined (_STDARG_H) || defined (_VARARGS_H) */
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