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Annotation of gcc/va-sparc.h, revision 1.1.1.5

1.1       root        1: /* This is just like the default gvarargs.h
1.1.1.3   root        2:    except for differences described below.  */
1.1       root        3: 
1.1.1.4   root        4: /* Define __gnuc_va_list.  */
                      5: 
                      6: #ifndef __GNUC_VA_LIST
                      7: #define __GNUC_VA_LIST
                      8: 
1.1.1.3   root        9: #ifndef __svr4__
1.1       root       10: /* This has to be a char * to be compatible with Sun.
                     11:    i.e., we have to pass a `va_list' to vsprintf.  */
1.1.1.4   root       12: typedef char * __gnuc_va_list;
1.1.1.3   root       13: #else
                     14: /* This has to be a void * to be compatible with Sun svr4.
                     15:    i.e., we have to pass a `va_list' to vsprintf.  */
1.1.1.4   root       16: typedef void * __gnuc_va_list;
1.1.1.3   root       17: #endif
1.1.1.4   root       18: #endif /* not __GNUC_VA_LIST */
                     19: 
                     20: /* If this is for internal libc use, don't define anything but
                     21:    __gnuc_va_list.  */
                     22: #if defined (_STDARG_H) || defined (_VARARGS_H)
1.1       root       23: 
1.1.1.5 ! root       24: #ifdef _STDARG_H
1.1       root       25: 
1.1.1.5 ! root       26: #ifdef __GCC_NEW_VARARGS__
        !            27: #define va_start(AP, LASTARG)  (AP = (char *) __builtin_saveregs ())
1.1       root       28: #else
1.1.1.2   root       29: #define va_start(AP, LASTARG)                                  \
                     30:   (__builtin_saveregs (), AP = ((char *) __builtin_next_arg ()))
1.1.1.5 ! root       31: #endif
        !            32: 
1.1.1.2   root       33: #else
1.1.1.5 ! root       34: 
1.1.1.3   root       35: #define va_alist  __builtin_va_alist
1.1.1.5 ! root       36: #define va_dcl    int __builtin_va_alist;
1.1.1.3   root       37: 
1.1.1.5 ! root       38: #ifdef __GCC_NEW_VARARGS__
        !            39: #define va_start(AP)           ((AP) = (char *) __builtin_saveregs ())
        !            40: #else
1.1       root       41: #define va_start(AP)                                           \
                     42:  (__builtin_saveregs (), (AP) = ((char *) &__builtin_va_alist))
1.1.1.2   root       43: #endif
                     44: 
1.1.1.5 ! root       45: #endif
        !            46: 
1.1.1.4   root       47: #ifndef va_end
                     48: void va_end (__gnuc_va_list);          /* Defined in libgcc.a */
                     49: #endif
1.1       root       50: #define va_end(pvar)
                     51: 
                     52: #define __va_rounded_size(TYPE)  \
                     53:   (((sizeof (TYPE) + sizeof (int) - 1) / sizeof (int)) * sizeof (int))
                     54: 
                     55: /* Avoid errors if compiling GCC v2 with GCC v1.  */
                     56: #if __GNUC__ == 1
                     57: #define __extension__
                     58: #endif
                     59: 
                     60: /* RECORD_TYPE args passed using the C calling convention are
                     61:    passed by invisible reference.  ??? RECORD_TYPE args passed
                     62:    in the stack are made to be word-aligned; for an aggregate that is
                     63:    not word-aligned, we advance the pointer to the first non-reg slot.  */
1.1.1.4   root       64: /* We don't declare the union member `d' to have type TYPE
                     65:    because that would lose in C++ if TYPE has a constructor.  */
                     66: /* We cast to void * and then to TYPE * because this avoids
1.1.1.5 ! root       67:    a warning about increasing the alignment requirement.
        !            68:    The casts to char * avoid warnings about invalid pointer arithmetic.  */
1.1       root       69: #define va_arg(pvar,TYPE)                                      \
                     70: __extension__                                                  \
                     71: ({ TYPE __va_temp;                                             \
                     72:    ((__builtin_classify_type (__va_temp) >= 12)                        \
1.1.1.5 ! root       73:     ? ((pvar) = (char *)(pvar) + __va_rounded_size (TYPE *),   \
        !            74:        **(TYPE **) (void *) ((char *)(pvar) - __va_rounded_size (TYPE *))) \
1.1.1.3   root       75:     : __va_rounded_size (TYPE) == 8                            \
1.1.1.4   root       76:     ? ({ union {char __d[sizeof (TYPE)]; int __i[2];} __u;     \
                     77:         __u.__i[0] = ((int *) (void *) (pvar))[0];             \
                     78:         __u.__i[1] = ((int *) (void *) (pvar))[1];             \
1.1.1.5 ! root       79:         (pvar) = (char *)(pvar) + 8;                           \
1.1.1.4   root       80:         *(TYPE *) (void *) __u.__d; })                         \
1.1.1.5 ! root       81:     : ((pvar) = (char *)(pvar) + __va_rounded_size (TYPE),     \
        !            82:        *((TYPE *) (void *) ((char *)(pvar) - __va_rounded_size (TYPE)))));})
1.1.1.4   root       83: 
                     84: #endif /* defined (_STDARG_H) || defined (_VARARGS_H) */
                     85: 

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