www.pudn.com > vxworks0108.rar > va-ppc.h
/* $OpenBSD: va-ppc.h,v 1.6 2001/03/29 18:52:19 drahn Exp $ */
/* GNU C varargs support for the PowerPC with either the V.4 or Windows NT calling sequences */
#ifndef _WIN32
/* System V.4 support */
/* Define __gnuc_va_list. */
#ifndef __GNUC_VA_LIST
#define __GNUC_VA_LIST
#ifndef _SYS_VA_LIST_H
#define _SYS_VA_LIST_H /* Solaris sys/va_list.h */
/* Solaris decided to rename overflow_arg_area to input_arg_area,
so handle it via a macro. */
#define __va_overflow(AP) (AP)->overflow_arg_area
/* Note that the names in this structure are in the user's namespace, but
that the V.4 abi explicitly states that these names should be used. */
typedef struct __va_list_tag {
char gpr; /* index into the array of 8 GPRs stored in the
register save area gpr=0 corresponds to r3,
gpr=1 to r4, etc. */
char fpr; /* index into the array of 8 FPRs stored in the
register save area fpr=0 corresponds to f1,
fpr=1 to f2, etc. */
char *overflow_arg_area; /* location on stack that holds the next
overflow argument */
char *reg_save_area; /* where r3:r10 and f1:f8, if saved are stored */
} __va_list[1], __gnuc_va_list[1];
#else /* _SYS_VA_LIST */
typedef __va_list __gnuc_va_list;
#define __va_overflow(AP) (AP)->input_arg_area
#endif /* not _SYS_VA_LIST */
#endif /* not __GNUC_VA_LIST */
/* If this is for internal libc use, don't define anything but
__gnuc_va_list. */
#if defined (_STDARG_H) || defined (_VARARGS_H)
/* Register save area located below the frame pointer */
#ifndef __VA_PPC_H__
#define __VA_PPC_H__
typedef struct {
long __gp_save[8]; /* save area for GP registers */
double __fp_save[8]; /* save area for FP registers */
} __va_regsave_t;
/* Macros to access the register save area */
/* We cast to void * and then to TYPE * because this avoids
a warning about increasing the alignment requirement. */
#define __VA_FP_REGSAVE(AP,TYPE) \
((TYPE *) (void *) (&(((__va_regsave_t *) \
(AP)->reg_save_area)->__fp_save[(int)(AP)->fpr])))
#define __VA_GP_REGSAVE(AP,TYPE) \
((TYPE *) (void *) (&(((__va_regsave_t *) \
(AP)->reg_save_area)->__gp_save[(int)(AP)->gpr])))
#if __GNUC_MINOR__ > 8
#define GCC29
#endif
#ifndef GCC29
/* Common code for va_start for both varargs and stdarg. This depends
on the format of rs6000_args in rs6000.h. The fields used are:
#0 WORDS # words used for GP regs/stack values
#1 FREGNO next available FP register
#2 NARGS_PROTOTYPE # args left in the current prototype
#3 ORIG_NARGS original value of NARGS_PROTOTYPE
#4 VARARGS_OFFSET offset from frame pointer of varargs area */
#else /* GCC29 */
/* Common code for va_start for both varargs and stdarg. We allow all
the work to be done by __builtin_saveregs. It returns a pointer to
a va_list that was constructed on the stack; we must simply copy it
to the user's variable. */
#endif /* GCC29 */
#ifndef GCC29
#define __va_words __builtin_args_info (0)
#define __va_fregno __builtin_args_info (1)
#define __va_nargs __builtin_args_info (2)
#define __va_orig_nargs __builtin_args_info (3)
#define __va_varargs_offset __builtin_args_info (4)
#define __va_start_common(AP, FAKE) \
__extension__ ({ \
register int __words = __va_words - FAKE; \
\
(AP) = (struct __va_list_tag *)__builtin_alloca(sizeof(struct __va_list_tag)); \
(AP)->gpr = (__words < 8) ? __words : 8; \
(AP)->fpr = __va_fregno - 33; \
(AP)->reg_save_area = (((char *) __builtin_frame_address (0)) \
+ __va_varargs_offset); \
__va_overflow(AP) = ((char *)__builtin_saveregs () \
+ (((__words >= 8) ? __words - 8 : 0) \
* sizeof (long))); \
(void)0; \
})
#else /* GCC29 */
#define __va_start_common(AP, FAKE) \
__extension__ ({ \
(AP) = (struct __va_list_tag *)__builtin_alloca(sizeof(__gnuc_va_list)); \
__builtin_memcpy ((AP), __builtin_saveregs (), sizeof(__gnuc_va_list)); \
})
#endif /* GCC29 */
#ifdef _STDARG_H /* stdarg.h support */
/* Calling __builtin_next_arg gives the proper error message if LASTARG is
not indeed the last argument. */
#define va_start(AP,LASTARG) \
(__builtin_next_arg (LASTARG), __va_start_common (AP, 0))
#else /* varargs.h support */
#define va_start(AP) __va_start_common (AP, 1)
#define va_alist __va_1st_arg
#define va_dcl register int va_alist; ...
#endif /* _STDARG_H */
#ifdef _SOFT_FLOAT
#define __va_float_p(TYPE) 0
#else
#define __va_float_p(TYPE) (__builtin_classify_type(*(TYPE *)0) == 8)
#endif
#define __va_longlong_p(TYPE) \
((__builtin_classify_type(*(TYPE *)0) == 1) && (sizeof(TYPE) == 8))
#define __va_aggregate_p(TYPE) (__builtin_classify_type(*(TYPE *)0) >= 12)
#define __va_size(TYPE) ((sizeof(TYPE) + sizeof (long) - 1) / sizeof (long))
#ifndef GCC29
#define va_arg(AP,TYPE) \
__extension__ (*({ \
register TYPE *__ptr; \
\
if (__va_float_p (TYPE) && (AP)->fpr < 8) \
{ \
__ptr = __VA_FP_REGSAVE (AP, TYPE); \
(AP)->fpr++; \
} \
\
else if (__va_aggregate_p (TYPE) && (AP)->gpr < 8) \
{ \
__ptr = * __VA_GP_REGSAVE (AP, TYPE *); \
(AP)->gpr++; \
} \
\
else if (!__va_float_p (TYPE) && !__va_aggregate_p (TYPE) \
&& (AP)->gpr + __va_size(TYPE) <= 8 \
&& (!__va_longlong_p(TYPE) \
|| (AP)->gpr + __va_size(TYPE) <= 7)) \
{ \
if (__va_longlong_p(TYPE) && ((AP)->gpr & 1) != 0) \
(AP)->gpr++; \
\
__ptr = __VA_GP_REGSAVE (AP, TYPE); \
(AP)->gpr += __va_size (TYPE); \
} \
\
else if (!__va_float_p (TYPE) && !__va_aggregate_p (TYPE) \
&& (AP)->gpr < 8) \
{ \
(AP)->gpr = 8; \
__ptr = (TYPE *) (void *) (__va_overflow(AP)); \
__va_overflow(AP) += __va_size (TYPE) * sizeof (long); \
} \
\
else if (__va_aggregate_p (TYPE)) \
{ \
__ptr = * (TYPE **) (void *) (__va_overflow(AP)); \
__va_overflow(AP) += sizeof (TYPE *); \
} \
else \
{ \
if (__va_longlong_p(TYPE) && ((long)__va_overflow(AP) & 4) != 0) \
__va_overflow(AP) += 4; \
\
__ptr = (TYPE *) (void *) (__va_overflow(AP)); \
__va_overflow(AP) += __va_size (TYPE) * sizeof (long); \
} \
\
__ptr; \
}))
#else /* GCC29 */
#define va_arg(AP,TYPE) \
__extension__ (*({ \
register TYPE *__ptr; \
\
if (__va_float_p (TYPE) && (AP)->fpr < 8) \
{ \
__ptr = __VA_FP_REGSAVE (AP, TYPE); \
(AP)->fpr++; \
} \
\
else if (__va_aggregate_p (TYPE) && (AP)->gpr < 8) \
{ \
__ptr = * __VA_GP_REGSAVE (AP, TYPE *); \
(AP)->gpr++; \
} \
\
else if (!__va_float_p (TYPE) && !__va_aggregate_p (TYPE) \
&& (AP)->gpr + __va_size(TYPE) <= 8 \
&& (!__va_longlong_p(TYPE) \
|| (AP)->gpr + __va_size(TYPE) <= 8)) \
{ \
if (__va_longlong_p(TYPE) && ((AP)->gpr & 1) != 0) \
(AP)->gpr++; \
\
__ptr = __VA_GP_REGSAVE (AP, TYPE); \
(AP)->gpr += __va_size (TYPE); \
} \
\
else if (!__va_float_p (TYPE) && !__va_aggregate_p (TYPE) \
&& (AP)->gpr < 8) \
{ \
(AP)->gpr = 8; \
__ptr = (TYPE *) (void *) (__va_overflow(AP)); \
__va_overflow(AP) += __va_size (TYPE) * sizeof (long); \
} \
\
else if (__va_aggregate_p (TYPE)) \
{ \
__ptr = * (TYPE **) (void *) (__va_overflow(AP)); \
__va_overflow(AP) += sizeof (TYPE *); \
} \
else \
{ \
__ptr = (TYPE *) (void *) (__va_overflow(AP)); \
__va_overflow(AP) += __va_size (TYPE) * sizeof (long); \
} \
\
__ptr; \
}))
#endif /* not GCC29 */
#define va_end(AP) ((void)0)
/* Copy __gnuc_va_list into another variable of this type. */
#define __va_copy(dest, src) \
__extension__ ({ \
(dest) = \
(struct __va_list_tag *)__builtin_alloca(sizeof(__gnuc_va_list)); \
*(dest) = *(src);\
})
#endif /* __VA_PPC_H__ */
#endif /* defined (_STDARG_H) || defined (_VARARGS_H) */
#else
/* Windows NT */
/* Define __gnuc_va_list. */
#ifndef __GNUC_VA_LIST
#define __GNUC_VA_LIST
typedef char *__gnuc_va_list;
#endif /* not __GNUC_VA_LIST */
/* If this is for internal libc use, don't define anything but
__gnuc_va_list. */
#if defined (_STDARG_H) || defined (_VARARGS_H)
#define __va_start_common(AP, LASTARG, FAKE) \
((__builtin_saveregs ()), ((AP) = ((char *) &LASTARG) + __va_rounded_size (AP)), 0)
#ifdef _STDARG_H /* stdarg.h support */
/* Calling __builtin_next_arg gives the proper error message if LASTARG is
not indeed the last argument. */
#define va_start(AP,LASTARG) \
(__builtin_saveregs (), \
(AP) = __builtin_next_arg (LASTARG), \
0)
#else /* varargs.h support */
#define va_start(AP) \
(__builtin_saveregs (), \
(AP) = __builtin_next_arg (__va_1st_arg) - sizeof (int), \
0)
#define va_alist __va_1st_arg
#define va_dcl register int __va_1st_arg; ...
#endif /* _STDARG_H */
#define __va_rounded_size(TYPE) ((sizeof (TYPE) + 3) & ~3)
#define __va_align(AP, TYPE) \
((((unsigned long)(AP)) + ((sizeof (TYPE) >= 8) ? 7 : 3)) \
& ~((sizeof (TYPE) >= 8) ? 7 : 3))
#define va_arg(AP,TYPE) \
( *(TYPE *)((AP = (char *) (__va_align(AP, TYPE) \
+ __va_rounded_size(TYPE))) \
- __va_rounded_size(TYPE)))
#define va_end(AP) ((void)0)
/* Copy __gnuc_va_list into another variable of this type. */
#define __va_copy(dest, src) (dest) = (src)
#endif /* defined (_STDARG_H) || defined (_VARARGS_H) */
#endif /* Windows NT */