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Annotation of gcc/va-sparc.h, revision 1.1.1.1

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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