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Annotation of GNUtools/cc/va-i960.h, revision 1.1.1.1

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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