stdarg.h revision 104583 
1/*-
2 * Copyright (c) 2002 David E. O'Brien.  All rights reserved.
3 * Copyright (c) 2000 Tsubai Masanari.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 *    derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 *	$NetBSD: stdarg.h,v 1.5 2000/02/27 17:50:21 tsubai Exp $
28 * $FreeBSD: head/sys/powerpc/include/stdarg.h 104583 2002-10-06 22:01:07Z mike $
29 */
30
31#ifndef _MACHINE_STDARG_H_
32#define	_MACHINE_STDARG_H_
33
34#include <sys/cdefs.h>
35#include <sys/_types.h>
36
37#ifndef _VA_LIST_DECLARED
38#define	_VA_LIST_DECLARED
39typedef	__va_list	va_list;
40#endif
41
42#if defined(__GNUC__) && (__GNUC__ == 2 && __GNUC_MINOR__ > 95 || __GNUC__ >= 3)
43
44#define	va_start(ap, last) \
45	__builtin_stdarg_start((ap), (last))
46
47#define	va_arg(ap, type) \
48	__builtin_va_arg((ap), type)
49
50#if __ISO_C_VISIBLE >= 1999
51#define	va_copy(dest, src) \
52	__builtin_va_copy((dest), (src))
53#endif
54
55#define	va_end(ap) \
56	__builtin_va_end(ap)
57
58#else	/* ! __GNUC__ post GCC 2.95 */
59
60#ifdef __lint__
61
62#define	va_start(ap, last)	((ap) = *(va_list *)0)
63#define	va_arg(ap, type)	(*(type *)(void *)&(ap))
64
65#else
66
67#if defined(__GNUC__) && (__GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ >= 95)
68#define	va_start(ap, last)						\
69	(__builtin_next_arg(last),					\
70	 __builtin_memcpy((void *)&(ap), __builtin_saveregs (),		\
71	 sizeof(__gnuc_va_list)))
72#else
73#define	va_start(ap, last)						\
74	(__builtin_next_arg(last),					\
75	 (ap).__stack = __va_stack_args,				\
76	 (ap).__base = __va_reg_args,					\
77	 (ap).__gpr = __va_first_gpr,					\
78	 (ap).__fpr = __va_first_fpr)
79#endif
80
81#define	__va_first_gpr	(__builtin_args_info(0))
82#define	__va_first_fpr	(__builtin_args_info(1) - 32 - 1)
83#define	__va_stack_args							\
84	((char *)__builtin_saveregs() +					\
85	 (__va_first_gpr >= 8 ? __va_first_gpr - 8 : 0) * sizeof(int))
86#define	__va_reg_args							\
87	((char *)__builtin_frame_address(0) + __builtin_args_info(4))
88
89#define	__INTEGER_TYPE_CLASS	1
90#define	__REAL_TYPE_CLASS	8
91#define	__RECORD_TYPE_CLASS	12
92
93#define	__va_longlong(type)						\
94	(__builtin_classify_type(*(type *)0) == __INTEGER_TYPE_CLASS &&	\
95	 sizeof(type) == 8)
96
97#define	__va_double(type)						\
98	(__builtin_classify_type(*(type *)0) == __REAL_TYPE_CLASS)
99
100#define	__va_struct(type)						\
101	(__builtin_classify_type(*(type *)0) >= __RECORD_TYPE_CLASS)
102
103#define	__va_size(type)							\
104	((sizeof(type) + sizeof(int) - 1) / sizeof(int) * sizeof(int))
105
106#define	__va_savedgpr(ap, type)						\
107	((ap).__base + (ap).__gpr * sizeof(int) - sizeof(type))
108
109#define	__va_savedfpr(ap, type)						\
110	((ap).__base + 8 * sizeof(int) + (ap).__fpr * sizeof(double) -	\
111	 sizeof(type))
112
113#define	__va_stack(ap, type)						\
114	((ap).__stack += __va_size(type) +				\
115			(__va_longlong(type) ? (int)(ap).__stack & 4 : 0), \
116	 (ap).__stack - sizeof(type))
117
118#define	__va_gpr(ap, type)						\
119	((ap).__gpr += __va_size(type) / sizeof(int) +			\
120		      (__va_longlong(type) ? (ap).__gpr & 1 : 0),	\
121	 (ap).__gpr <= 8 ? __va_savedgpr(ap, type) : __va_stack(ap, type))
122
123#define	__va_fpr(ap, type)						\
124	((ap).__fpr++,							\
125	 (ap).__fpr <= 8 ? __va_savedfpr(ap, type) : __va_stack(ap, type))
126
127#define	va_arg(ap, type)						\
128	(*(type *)(__va_struct(type) ? (*(void **)__va_gpr(ap, void *)) : \
129		   __va_double(type) ? __va_fpr(ap, type) :		\
130		   __va_gpr(ap, type)))
131
132#endif /* __lint__ */
133
134#define	va_end(ap)
135
136#if __ISO_C_VISIBLE >= 1999
137#if !defined(_ANSI_SOURCE) &&						\
138    (!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) ||		\
139     defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L)
140#define	va_copy(dest, src)						\
141	((dest) = (src))
142#endif
143#endif
144
145#endif /* __GNUC__ post GCC 2.95 */
146
147#endif /* _MACHINE_STDARG_H_ */
148