1 | /* GNU C varargs support for the Intel 80960. */ |
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2 | |
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3 | /* Define __gnuc_va_list. */ |
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4 | |
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5 | #ifndef __GNUC_VA_LIST |
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6 | #define __GNUC_VA_LIST |
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7 | /* The first element is the address of the first argument. |
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8 | The second element is the number of bytes skipped past so far. */ |
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9 | typedef unsigned __gnuc_va_list[2]; |
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10 | #endif /* not __GNUC_VA_LIST */ |
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11 | |
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12 | /* If this is for internal libc use, don't define anything but |
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13 | __gnuc_va_list. */ |
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14 | #if defined (_STDARG_H) || defined (_VARARGS_H) |
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15 | |
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16 | /* In GCC version 2, we want an ellipsis at the end of the declaration |
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17 | of the argument list. GCC version 1 can't parse it. */ |
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18 | |
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19 | #if __GNUC__ > 1 |
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20 | #define __va_ellipsis ... |
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21 | #else |
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22 | #define __va_ellipsis |
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23 | #endif |
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24 | |
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25 | /* The stack size of the type t. */ |
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26 | #define __vsiz(T) (((sizeof (T) + 3) / 4) * 4) |
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27 | /* The stack alignment of the type t. */ |
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28 | #define __vali(T) (__alignof__ (T) >= 4 ? __alignof__ (T) : 4) |
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29 | /* The offset of the next stack argument after one of type t at offset i. */ |
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30 | #define __vpad(I, T) ((((I) + __vali (T) - 1) / __vali (T)) \ |
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31 | * __vali (T) + __vsiz (T)) |
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32 | |
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33 | /* Avoid errors if compiling GCC v2 with GCC v1. */ |
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34 | #if __GNUC__ == 1 |
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35 | #define __extension__ |
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36 | #endif |
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37 | |
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38 | #ifdef _STDARG_H |
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39 | /* Call __builtin_next_arg even though we aren't using its value, so that |
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40 | we can verify that firstarg is correct. */ |
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41 | #define va_start(AP, LASTARG) \ |
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42 | __extension__ \ |
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43 | ({ __builtin_next_arg (LASTARG); \ |
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44 | __asm__ ("st g14,%0" : "=m" (*(AP))); \ |
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45 | (AP)[1] = (__builtin_args_info (0) + __builtin_args_info (1)) * 4; }) |
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46 | |
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47 | #else |
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48 | |
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49 | #define va_alist __builtin_va_alist |
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50 | #define va_dcl char *__builtin_va_alist; __va_ellipsis |
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51 | #define va_start(AP) \ |
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52 | __extension__ \ |
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53 | ({ __asm__ ("st g14,%0" : "=m" (*(AP))); \ |
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54 | (AP)[1] = (__builtin_args_info (0) + __builtin_args_info (1)) * 4; }) |
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55 | #endif |
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56 | |
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57 | /* We cast to void * and then to TYPE * because this avoids |
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58 | a warning about increasing the alignment requirement. */ |
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59 | #define va_arg(AP, T) \ |
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60 | ( \ |
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61 | ( \ |
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62 | ((AP)[1] <= 48 && (__vpad ((AP)[1], T) > 48 || __vsiz (T) > 16)) \ |
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63 | ? ((AP)[1] = 48 + __vsiz (T)) \ |
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64 | : ((AP)[1] = __vpad ((AP)[1], T)) \ |
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65 | ), \ |
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66 | \ |
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67 | *((T *) (void *) ((char *) *(AP) + (AP)[1] - __vsiz (T))) \ |
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68 | ) |
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69 | |
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70 | #ifndef va_end |
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71 | void va_end (__gnuc_va_list); /* Defined in libgcc.a */ |
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72 | #endif |
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73 | #define va_end(AP) ((void *)0) |
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74 | |
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75 | #endif /* defined (_STDARG_H) || defined (_VARARGS_H) */ |
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76 | |
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