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Annotation of gcc/va-sparc.h, revision 1.1

1.1     ! root        1: /* This is just like the default gvarargs.h
        !             2:    except for differences decribed below.  */
        !             3: 
        !             4: /* Make this a macro rather than a typedef, so we can undef any other defn.  */
        !             5: #define va_list __va___list
        !             6: /* This has to be a char * to be compatible with Sun.
        !             7:    i.e., we have to pass a `va_list' to vsprintf.  */
        !             8: typedef char * __va___list;
        !             9: 
        !            10: /* In GCC version 2, we want an ellipsis at the end of the declaration
        !            11:    of the argument list.  GCC version 1 can't parse it.  */
        !            12: 
        !            13: #if __GNUC__ > 1
        !            14: #define __va_ellipsis ...
        !            15: #else
        !            16: #define __va_ellipsis
        !            17: #endif
        !            18: 
        !            19: #define va_alist  __builtin_va_alist
        !            20: /* The ... causes current_function_varargs to be set in cc1.  */
        !            21: #define va_dcl    int __builtin_va_alist; __va_ellipsis
        !            22: 
        !            23: /* The difference is to store the stack address in both components
        !            24:    instead of in AP itself.  */
        !            25: #define va_start(AP)                                           \
        !            26:  (__builtin_saveregs (), (AP) = ((char *) &__builtin_va_alist))
        !            27: #define va_end(pvar)
        !            28: 
        !            29: #define __va_rounded_size(TYPE)  \
        !            30:   (((sizeof (TYPE) + sizeof (int) - 1) / sizeof (int)) * sizeof (int))
        !            31: 
        !            32: /* Avoid errors if compiling GCC v2 with GCC v1.  */
        !            33: #if __GNUC__ == 1
        !            34: #define __extension__
        !            35: #endif
        !            36: 
        !            37: /* RECORD_TYPE args passed using the C calling convention are
        !            38:    passed by invisible reference.  ??? RECORD_TYPE args passed
        !            39:    in the stack are made to be word-aligned; for an aggregate that is
        !            40:    not word-aligned, we advance the pointer to the first non-reg slot.  */
        !            41: #define va_arg(pvar,TYPE)                                      \
        !            42: __extension__                                                  \
        !            43: ({ TYPE __va_temp;                                             \
        !            44:    ((__builtin_classify_type (__va_temp) >= 12)                        \
        !            45:     ? ((pvar) += __va_rounded_size (TYPE *),                   \
        !            46:        **(TYPE **) (pvar) - __va_rounded_size (TYPE *))                \
        !            47:     : ((pvar) += __va_rounded_size (TYPE),             \
        !            48:        *((TYPE *) ((pvar) - __va_rounded_size (TYPE)))));})

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