gcc/ginclude/va-i960.h

   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 /* Call __builtin_next_arg even though we aren't using its value, so that
  40    we can verify that firstarg is correct.  */
  41 #define va_start(AP, LASTARG)                           \
  42 __extension__                                           \
  43 ({ __builtin_next_arg (LASTARG);                        \
  44    __asm__ ("st g14,%0" : "=m" (*(AP)));                \
  45    (AP)[1] = (__builtin_args_info (0) + __builtin_args_info (1)) * 4; })
  46
  47 #else
  48
  49 #define va_alist __builtin_va_alist
  50 #define va_dcl   char *__builtin_va_alist; __va_ellipsis
  51 #define va_start(AP) \
  52 __extension__                                           \
  53 ({ __asm__ ("st g14,%0" : "=m" (*(AP)));                \
  54    (AP)[1] = (__builtin_args_info (0) + __builtin_args_info (1)) * 4; })
  55 #endif
  56
  57 /* We cast to void * and then to TYPE * because this avoids
  58    a warning about increasing the alignment requirement.  */
  59 #define va_arg(AP, T)                                                   \
  60 (                                                                       \
  61   (                                                                     \
  62     ((AP)[1] <= 48 && (__vpad ((AP)[1], T) > 48 || __vsiz (T) > 16))    \
  63       ? ((AP)[1] = 48 + __vsiz (T))                                     \
  64       : ((AP)[1] = __vpad ((AP)[1], T))                                 \
  65   ),                                                                    \
  66                                                                         \
  67   *((T *) (void *) ((char *) *(AP) + (AP)[1] - __vsiz (T)))             \
  68 )
  69
  70 #ifndef va_end
  71 void va_end (__gnuc_va_list);           /* Defined in libgcc.a */
  72 #endif
  73 #define va_end(AP)      ((void *)0)
  74
  75 /* Copy __gnuc_va_list into another variable of this type.  */
  76 #define __va_copy(dest, src) (dest) = (src)
  77
  78 #endif /* defined (_STDARG_H) || defined (_VARARGS_H) */
  79