projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 9b58980d C |
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 | #ifdef _STDARG_H | |
| 34 | #define va_start(AP, LASTARG) \ | |
| 35 | __extension__ \ | |
| 36 | ({ __asm__ ("st g14,%0" : "=m" (*(AP))); \ | |
| 37 | (AP)[1] = (unsigned) __builtin_next_arg () - *AP; }) | |
| 38 | #else | |
| 39 | ||
| 40 | #define va_alist __builtin_va_alist | |
| 41 | #define va_dcl char *__builtin_va_alist; __va_ellipsis | |
| 42 | #define va_start(AP) ((AP)[1] = 0, *(AP) = (unsigned) &va_alist) | |
| 43 | #endif | |
| 44 | ||
| 45 | /* We cast to void * and then to TYPE * because this avoids | |
| 46 | a warning about increasing the alignment requirement. */ | |
| 47 | #define va_arg(AP, T) \ | |
| 48 | ( \ | |
| 49 | ( \ | |
| 50 | ((AP)[1] <= 48 && (__vpad ((AP)[1], T) > 48 || __vsiz (T) > 16)) \ | |
| 51 | ? ((AP)[1] = 48 + __vsiz (T)) \ | |
| 52 | : ((AP)[1] = __vpad ((AP)[1], T)) \ | |
| 53 | ), \ | |
| 54 | \ | |
| 55 | *((T *) (void *) ((char *) *(AP) + (AP)[1] - __vsiz (T))) \ | |
| 56 | ) | |
| 57 | ||
| 58 | #ifndef va_end | |
| 59 | void va_end (__gnuc_va_list); /* Defined in libgcc.a */ | |
| 60 | #endif | |
| 61 | #define va_end(AP) | |
| 62 | ||
| 63 | #endif /* defined (_STDARG_H) || defined (_VARARGS_H) */ | |
| 64 |