stdarg.h revision 85169 
1/*-
2 * Copyright (c) 2000 Tsubai Masanari.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 * 3. The name of the author may not be used to endorse or promote products
13 *    derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 *	$NetBSD: stdarg.h,v 1.5 2000/02/27 17:50:21 tsubai Exp $
27 * $FreeBSD: head/sys/powerpc/include/stdarg.h 85169 2001-10-19 16:15:46Z mp $
28 */
29
30#ifndef _POWERPC_STDARG_H_
31#define	_POWERPC_STDARG_H_
32
33#include <machine/ansi.h>
34
35typedef _BSD_VA_LIST_	va_list;
36
37#ifdef __lint__
38
39#define	va_start(ap, last)	((ap) = *(va_list *)0)
40#define	va_arg(ap, type)	(*(type *)(void *)&(ap))
41
42#else
43
44#if defined(__GNUC__) && (__GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ >= 95)
45#define	va_start(ap, last)						\
46	(__builtin_next_arg(last),					\
47	 __builtin_memcpy((void *)&(ap), __builtin_saveregs (),		\
48	 sizeof(__gnuc_va_list)))
49#else
50#define	va_start(ap, last)						\
51	(__builtin_next_arg(last),					\
52	 (ap).__stack = __va_stack_args,				\
53	 (ap).__base = __va_reg_args,					\
54	 (ap).__gpr = __va_first_gpr,					\
55	 (ap).__fpr = __va_first_fpr)
56#endif
57
58#define	__va_first_gpr	(__builtin_args_info(0))
59#define	__va_first_fpr	(__builtin_args_info(1) - 32 - 1)
60#define	__va_stack_args							\
61	((char *)__builtin_saveregs() +					\
62	 (__va_first_gpr >= 8 ? __va_first_gpr - 8 : 0) * sizeof(int))
63#define	__va_reg_args							\
64	((char *)__builtin_frame_address(0) + __builtin_args_info(4))
65
66#define	__INTEGER_TYPE_CLASS	1
67#define	__REAL_TYPE_CLASS	8
68#define	__RECORD_TYPE_CLASS	12
69
70#define	__va_longlong(type)						\
71	(__builtin_classify_type(*(type *)0) == __INTEGER_TYPE_CLASS &&	\
72	 sizeof(type) == 8)
73
74#define	__va_double(type)						\
75	(__builtin_classify_type(*(type *)0) == __REAL_TYPE_CLASS)
76
77#define	__va_struct(type)						\
78	(__builtin_classify_type(*(type *)0) >= __RECORD_TYPE_CLASS)
79
80#define	__va_size(type)							\
81	((sizeof(type) + sizeof(int) - 1) / sizeof(int) * sizeof(int))
82
83#define	__va_savedgpr(ap, type)						\
84	((ap).__base + (ap).__gpr * sizeof(int) - sizeof(type))
85
86#define	__va_savedfpr(ap, type)						\
87	((ap).__base + 8 * sizeof(int) + (ap).__fpr * sizeof(double) -	\
88	 sizeof(type))
89
90#define	__va_stack(ap, type)						\
91	((ap).__stack += __va_size(type) +				\
92			(__va_longlong(type) ? (int)(ap).__stack & 4 : 0), \
93	 (ap).__stack - sizeof(type))
94
95#define	__va_gpr(ap, type)						\
96	((ap).__gpr += __va_size(type) / sizeof(int) +			\
97		      (__va_longlong(type) ? (ap).__gpr & 1 : 0),	\
98	 (ap).__gpr <= 8 ? __va_savedgpr(ap, type) : __va_stack(ap, type))
99
100#define	__va_fpr(ap, type)						\
101	((ap).__fpr++,							\
102	 (ap).__fpr <= 8 ? __va_savedfpr(ap, type) : __va_stack(ap, type))
103
104#define	va_arg(ap, type)						\
105	(*(type *)(__va_struct(type) ? (*(void **)__va_gpr(ap, void *)) : \
106		   __va_double(type) ? __va_fpr(ap, type) :		\
107		   __va_gpr(ap, type)))
108
109#endif /* __lint__ */
110
111#define	va_end(ap)
112
113#if !defined(_ANSI_SOURCE) &&						\
114    (!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) ||		\
115     defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L)
116#define	va_copy(dest, src)						\
117	((dest) = (src))
118#endif
119
120#endif /* _POWERPC_STDARG_H_ */
121