147 lines
4.9 KiB
C
147 lines
4.9 KiB
C
/* $NetBSD: va-ppc.h,v 1.2 1998/01/05 07:02:55 perry Exp $ */
|
|
|
|
/* GNU C varargs support for the PowerPC with V.4 calling sequence */
|
|
|
|
/* Define __gnuc_va_list. */
|
|
|
|
#ifndef __GNUC_VA_LIST
|
|
#define __GNUC_VA_LIST
|
|
|
|
/* 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 __gnuc_va_list__ {
|
|
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 */
|
|
} __gnuc_va_list[1];
|
|
#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 */
|
|
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])))
|
|
|
|
/* 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 */
|
|
|
|
#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)->gpr = (__words < 8) ? __words : 8; \
|
|
(AP)->fpr = __va_fregno - 33; \
|
|
(AP)->reg_save_area = (((char *) __builtin_frame_address (0)) \
|
|
+ __va_varargs_offset); \
|
|
(AP)->overflow_arg_area = ((char *)__builtin_saveregs () \
|
|
+ (((__words >= 8) ? __words - 8 : 0) \
|
|
* sizeof (long))); \
|
|
(void)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_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_aggregate_p(TYPE) (__builtin_classify_type(*(TYPE *)0) >= 12)
|
|
#define __va_size(TYPE) ((sizeof(TYPE) + sizeof (long) - 1) / sizeof (long))
|
|
|
|
#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) \
|
|
{ \
|
|
__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 *) ((AP)->overflow_arg_area); \
|
|
(AP)->overflow_arg_area += __va_size (TYPE) * sizeof (long); \
|
|
} \
|
|
\
|
|
else if (__va_aggregate_p (TYPE)) \
|
|
{ \
|
|
__ptr = * (TYPE **) (void *) ((AP)->overflow_arg_area); \
|
|
(AP)->overflow_arg_area += sizeof (TYPE *); \
|
|
} \
|
|
else \
|
|
{ \
|
|
__ptr = (TYPE *) (void *) ((AP)->overflow_arg_area); \
|
|
(AP)->overflow_arg_area += __va_size (TYPE) * sizeof (long); \
|
|
} \
|
|
\
|
|
__ptr; \
|
|
}))
|
|
|
|
#define va_end(AP) ((void)0)
|
|
|
|
#endif /* defined (_STDARG_H) || defined (_VARARGS_H) */
|