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#ifndef _STDARG_H
#define _STDARG_H
#ifdef __x86_64__
#ifdef __TINYC__
#include <stdlib.h>
/* GCC compatible definition of va_list. */
struct __va_list_struct {
unsigned int gp_offset;
unsigned int fp_offset;
union {
unsigned int overflow_offset;
char *overflow_arg_area;
};
char *reg_save_area;
};
typedef struct __va_list_struct *va_list;
/* we use __builtin_(malloc|free) to avoid #define malloc tcc_malloc */
/* XXX: this lacks the support of aggregated types. */
#define va_start(ap, last) \
(ap = (va_list)__builtin_malloc(sizeof(struct __va_list_struct)), \
*ap = *(struct __va_list_struct*)( \
(char*)__builtin_frame_address(0) - 16), \
ap->overflow_arg_area = ((char *)__builtin_frame_address(0) + \
ap->overflow_offset), \
ap->reg_save_area = (char *)__builtin_frame_address(0) - 176 - 16 \
)
#define va_arg(ap, type) \
(*(type*)(__builtin_types_compatible_p(type, long double) \
? (ap->overflow_arg_area += 16, \
ap->overflow_arg_area - 16) \
: __builtin_types_compatible_p(type, double) \
? (ap->fp_offset < 128 + 48 \
? (ap->fp_offset += 16, \
ap->reg_save_area + ap->fp_offset - 16) \
: (ap->overflow_arg_area += 8, \
ap->overflow_arg_area - 8)) \
: (ap->gp_offset < 48 \
? (ap->gp_offset += 8, \
ap->reg_save_area + ap->gp_offset - 8) \
: (ap->overflow_arg_area += 8, \
ap->overflow_arg_area - 8)) \
))
#define va_copy(dest, src) \
((dest) = (va_list)malloc(sizeof(struct __va_list_struct)), \
*(dest) = *(src))
#define va_end(ap) __builtin_free(ap)
#else
/* for GNU C */
typedef __builtin_va_list va_list;
#define va_start(ap, last) __builtin_va_start(ap, last)
#define va_arg(ap, type) __builtin_va_arg(ap, type)
#define va_copy(dest, src) __builtin_va_copy(dest, src)
#define va_end(ap) __builtin_va_end(ap)
#endif
#else
typedef char *va_list;
/* only correct for i386 */
#define va_start(ap,last) ap = ((char *)&(last)) + ((sizeof(last)+3)&~3)
#define va_arg(ap,type) (ap += (sizeof(type)+3)&~3, *(type *)(ap - ((sizeof(type)+3)&~3)))
#define va_copy(dest, src) (dest) = (src)
#define va_end(ap)
#endif
/* fix a buggy dependency on GCC in libio.h */
typedef va_list __gnuc_va_list;
#define _VA_LIST_DEFINED
#endif /* _STDARG_H */
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