gcc/ginclude/va-spur.h

   1 /*  varargs.h for SPUR */
   2
   3 /* NB.  This is NOT the definition needed for the new ANSI proposed
   4    standard */
   5
   6
   7 struct __va_struct { char __regs[20]; };
   8
   9 #define va_alist __va_regs, __va_stack
  10
  11 /* In GCC version 2, we want an ellipsis at the end of the declaration
  12    of the argument list.  GCC version 1 can't parse it.  */
  13
  14 #if __GNUC__ > 1
  15 #define __va_ellipsis ...
  16 #else
  17 #define __va_ellipsis
  18 #endif
  19
  20 /* The ... causes current_function_varargs to be set in cc1.  */
  21 #define va_dcl struct __va_struct __va_regs; int __va_stack;
  22
  23 typedef struct {
  24     int __pnt;
  25     char *__regs;
  26     char *__stack;
  27 } va_list;
  28
  29 #define va_start(pvar) \
  30      ((pvar).__pnt = 0, (pvar).__regs = __va_regs.__regs, \
  31       (pvar).__stack = (char *) &__va_stack)
  32 #define va_end(pvar)
  33
  34 #define va_arg(pvar,type)  \
  35     ({  type __va_result; \
  36         if ((pvar).__pnt >= 20) { \
  37            __va_result = *( (type *) ((pvar).__stack + (pvar).__pnt - 20)); \
  38            (pvar).__pnt += (sizeof(type) + 7) & ~7; \
  39         } \
  40         else if ((pvar).__pnt + sizeof(type) > 20) { \
  41            __va_result = * (type *) (pvar).__stack; \
  42            (pvar).__pnt = 20 + ( (sizeof(type) + 7) & ~7); \
  43         } \
  44         else if (sizeof(type) == 8) { \
  45            union {double d; int i[2];} __u; \
  46            __u.i[0] = *(int *) ((pvar).__regs + (pvar).__pnt); \
  47            __u.i[1] = *(int *) ((pvar).__regs + (pvar).__pnt + 4); \
  48            __va_result = * (type *) &__u; \
  49            (pvar).__pnt += 8; \
  50         } \
  51         else { \
  52            __va_result = * (type *) ((pvar).__regs + (pvar).__pnt); \
  53            (pvar).__pnt += (sizeof(type) + 3) & ~3; \
  54         } \
  55         __va_result; })