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Annotation of GNUtools/cc/va-i960.h, revision 1.1

1.1     ! root        1: /* GNU C varargs support for the Intel 80960.  */
        !             2: 
        !             3: /* Define __gnuc_va_list.  */
        !             4: 
        !             5: #ifndef __GNUC_VA_LIST
        !             6: #define __GNUC_VA_LIST
        !             7: /* The first element is the address of the first argument.
        !             8:    The second element is the number of bytes skipped past so far.  */
        !             9: typedef unsigned __gnuc_va_list[2];    
        !            10: #endif /* not __GNUC_VA_LIST */
        !            11: 
        !            12: /* If this is for internal libc use, don't define anything but
        !            13:    __gnuc_va_list.  */
        !            14: #if defined (_STDARG_H) || defined (_VARARGS_H)
        !            15: 
        !            16: /* In GCC version 2, we want an ellipsis at the end of the declaration
        !            17:    of the argument list.  GCC version 1 can't parse it.  */
        !            18: 
        !            19: #if __GNUC__ > 1
        !            20: #define __va_ellipsis ...
        !            21: #else
        !            22: #define __va_ellipsis
        !            23: #endif
        !            24: 
        !            25: /* The stack size of the type t.  */
        !            26: #define __vsiz(T)   (((sizeof (T) + 3) / 4) * 4)
        !            27: /* The stack alignment of the type t.  */
        !            28: #define __vali(T)   (__alignof__ (T) >= 4 ? __alignof__ (T) : 4)
        !            29: /* The offset of the next stack argument after one of type t at offset i.  */
        !            30: #define __vpad(I, T) ((((I) + __vali (T) - 1) / __vali (T)) \
        !            31:                       * __vali (T) + __vsiz (T))
        !            32: 
        !            33: /* Avoid errors if compiling GCC v2 with GCC v1.  */
        !            34: #if __GNUC__ == 1
        !            35: #define __extension__
        !            36: #endif
        !            37: 
        !            38: #ifdef _STDARG_H
        !            39: #define va_start(AP, LASTARG)                          \
        !            40: __extension__                                          \
        !            41: ({ __asm__ ("st        g14,%0" : "=m" (*(AP)));                \
        !            42:    (AP)[1] = (unsigned) __builtin_next_arg () - *AP; })
        !            43: #else
        !            44: 
        !            45: #define        va_alist __builtin_va_alist
        !            46: #define        va_dcl   char *__builtin_va_alist; __va_ellipsis
        !            47: #define        va_start(AP) ((AP)[1] = 0, *(AP) = (unsigned) &va_alist)
        !            48: #endif
        !            49: 
        !            50: /* We cast to void * and then to TYPE * because this avoids
        !            51:    a warning about increasing the alignment requirement.  */
        !            52: #define        va_arg(AP, T)                                                   \
        !            53: (                                                                      \
        !            54:   (                                                                    \
        !            55:     ((AP)[1] <= 48 && (__vpad ((AP)[1], T) > 48 || __vsiz (T) > 16))   \
        !            56:       ? ((AP)[1] = 48 + __vsiz (T))                                    \
        !            57:       : ((AP)[1] = __vpad ((AP)[1], T))                                        \
        !            58:   ),                                                                   \
        !            59:                                                                        \
        !            60:   *((T *) (void *) ((char *) *(AP) + (AP)[1] - __vsiz (T)))            \
        !            61: )
        !            62: 
        !            63: #ifndef va_end
        !            64: void va_end (__gnuc_va_list);          /* Defined in libgcc.a */
        !            65: #endif
        !            66: #define        va_end(AP)
        !            67: 
        !            68: #endif /* defined (_STDARG_H) || defined (_VARARGS_H) */
        !            69: 

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