mirror of
https://github.com/HarbourMasters/Shipwright.git
synced 2024-11-01 08:05:07 -04:00
44 lines
1.9 KiB
C
44 lines
1.9 KiB
C
|
#ifndef STDARG_H
|
||
|
|
#define STDARG_H
|
||
|
|
|
||
|
|
// When building with GCC, use the official vaarg macros to avoid warnings
|
||
|
|
// and possibly bad codegen.
|
||
|
|
#ifdef __GNUC__
|
||
|
|
#define va_list __builtin_va_list
|
||
|
|
#define va_start __builtin_va_start
|
||
|
|
#define va_arg __builtin_va_arg
|
||
|
|
#define va_end __builtin_va_end
|
||
|
|
#else
|
||
|
|
|
||
|
|
typedef char* va_list;
|
||
|
|
#define _FP 1
|
||
|
|
#define _INT 0
|
||
|
|
#define _STRUCT 2
|
||
|
|
|
||
|
|
#define _VA_FP_SAVE_AREA 0x10
|
||
|
|
#define _VA_ALIGN(p, a) (((uintptr_t)(((char*)p) + ((a) > 4 ? (a) : 4) - 1)) & -((a) > 4 ? (a) : 4))
|
||
|
|
#define va_start(vp, parmN) (vp = ((va_list)&parmN + sizeof(parmN)))
|
||
|
|
|
||
|
|
#define __va_stack_arg(list, mode) \
|
||
|
|
( \
|
||
|
|
((list) = (char*)_VA_ALIGN(list, __builtin_alignof(mode)) + \
|
||
|
|
_VA_ALIGN(sizeof(mode), 4)), \
|
||
|
|
(((char*)list) - (_VA_ALIGN(sizeof(mode), 4) - sizeof(mode))))
|
||
|
|
|
||
|
|
#define __va_double_arg(list, mode) \
|
||
|
|
( \
|
||
|
|
(((s32)list & 0x1) /* 1 byte aligned? */ \
|
||
|
|
? (list = (char*)((s32)list + 7), (char*)((s32)list - 6 - _VA_FP_SAVE_AREA)) \
|
||
|
|
: (((s32)list & 0x2) /* 2 byte aligned? */ \
|
||
|
|
? (list = (char*)((s32)list + 10), (char*)((s32)list - 24 - _VA_FP_SAVE_AREA)) \
|
||
|
|
: __va_stack_arg(list, mode))))
|
||
|
|
|
||
|
|
#define va_arg(list, mode) ((mode*)(((__builtin_classof(mode) == _FP && \
|
||
|
|
__builtin_alignof(mode) == sizeof(f64)) \
|
||
|
|
? __va_double_arg(list, mode) \
|
||
|
|
: __va_stack_arg(list, mode))))[-1]
|
||
|
|
#define va_end(__list)
|
||
|
|
|
||
|
|
#endif
|
||
|
|
#endif
|