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comparison touchTest/Iphone Test/touchTestIPhone2/touchTestIPhone/include/SDL_endian.h @ 4677:31607094315c

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Added Iphone project. Iphone multi-touch is now functional.
author jimtla
date Sat, 31 Jul 2010 01:24:50 +0400
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4676:99b4560b7aa1 4677:31607094315c
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2010 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22
23 /**
24 * \file SDL_endian.h
25 *
26 * Functions for reading and writing endian-specific values
27 */
28
29 #ifndef _SDL_endian_h
30 #define _SDL_endian_h
31
32 #include "SDL_stdinc.h"
33
34 /**
35 * \name The two types of endianness
36 */
37 /*@{*/
38 #define SDL_LIL_ENDIAN 1234
39 #define SDL_BIG_ENDIAN 4321
40 /*@}*/
41
42 #ifndef SDL_BYTEORDER /* Not defined in SDL_config.h? */
43 #if defined(__hppa__) || \
44 defined(__m68k__) || defined(mc68000) || defined(_M_M68K) || \
45 (defined(__MIPS__) && defined(__MISPEB__)) || \
46 defined(__ppc__) || defined(__POWERPC__) || defined(_M_PPC) || \
47 defined(__sparc__)
48 #define SDL_BYTEORDER SDL_BIG_ENDIAN
49 #else
50 #define SDL_BYTEORDER SDL_LIL_ENDIAN
51 #endif
52 #endif /* !SDL_BYTEORDER */
53
54
55 #include "begin_code.h"
56 /* Set up for C function definitions, even when using C++ */
57 #ifdef __cplusplus
58 /* *INDENT-OFF* */
59 extern "C" {
60 /* *INDENT-ON* */
61 #endif
62
63 /**
64 * \file SDL_endian.h
65 *
66 * Uses inline functions for compilers that support them, and static
67 * functions for those that do not. Because these functions become
68 * static for compilers that do not support inline functions, this
69 * header should only be included in files that actually use them.
70 */
71 #if defined(__GNUC__) && defined(__i386__) && \
72 !(__GNUC__ == 2 && __GNUC_MINOR__ == 95 /* broken gcc version */)
73 static __inline__ Uint16
74 SDL_Swap16(Uint16 x)
75 {
76 __asm__("xchgb %b0,%h0": "=q"(x):"0"(x));
77 return x;
78 }
79 #elif defined(__GNUC__) && defined(__x86_64__)
80 static __inline__ Uint16
81 SDL_Swap16(Uint16 x)
82 {
83 __asm__("xchgb %b0,%h0": "=Q"(x):"0"(x));
84 return x;
85 }
86 #elif defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
87 static __inline__ Uint16
88 SDL_Swap16(Uint16 x)
89 {
90 Uint16 result;
91
92 __asm__("rlwimi %0,%2,8,16,23": "=&r"(result):"0"(x >> 8), "r"(x));
93 return result;
94 }
95 #elif defined(__GNUC__) && (defined(__M68000__) || defined(__M68020__)) && !defined(__mcoldfire__)
96 static __inline__ Uint16
97 SDL_Swap16(Uint16 x)
98 {
99 __asm__("rorw #8,%0": "=d"(x): "0"(x):"cc");
100 return x;
101 }
102 #else
103 static __inline__ Uint16
104 SDL_Swap16(Uint16 x)
105 {
106 return SDL_static_cast(Uint16, ((x << 8) | (x >> 8)));
107 }
108 #endif
109
110 #if defined(__GNUC__) && defined(__i386__)
111 static __inline__ Uint32
112 SDL_Swap32(Uint32 x)
113 {
114 __asm__("bswap %0": "=r"(x):"0"(x));
115 return x;
116 }
117 #elif defined(__GNUC__) && defined(__x86_64__)
118 static __inline__ Uint32
119 SDL_Swap32(Uint32 x)
120 {
121 __asm__("bswapl %0": "=r"(x):"0"(x));
122 return x;
123 }
124 #elif defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
125 static __inline__ Uint32
126 SDL_Swap32(Uint32 x)
127 {
128 Uint32 result;
129
130 __asm__("rlwimi %0,%2,24,16,23": "=&r"(result):"0"(x >> 24), "r"(x));
131 __asm__("rlwimi %0,%2,8,8,15": "=&r"(result):"0"(result), "r"(x));
132 __asm__("rlwimi %0,%2,24,0,7": "=&r"(result):"0"(result), "r"(x));
133 return result;
134 }
135 #elif defined(__GNUC__) && (defined(__M68000__) || defined(__M68020__)) && !defined(__mcoldfire__)
136 static __inline__ Uint32
137 SDL_Swap32(Uint32 x)
138 {
139 __asm__("rorw #8,%0\n\tswap %0\n\trorw #8,%0": "=d"(x): "0"(x):"cc");
140 return x;
141 }
142 #else
143 static __inline__ Uint32
144 SDL_Swap32(Uint32 x)
145 {
146 return SDL_static_cast(Uint32, ((x << 24) | ((x << 8) & 0x00FF0000) |
147 ((x >> 8) & 0x0000FF00) | (x >> 24)));
148 }
149 #endif
150
151 #ifdef SDL_HAS_64BIT_TYPE
152 #if defined(__GNUC__) && defined(__i386__)
153 static __inline__ Uint64
154 SDL_Swap64(Uint64 x)
155 {
156 union
157 {
158 struct
159 {
160 Uint32 a, b;
161 } s;
162 Uint64 u;
163 } v;
164 v.u = x;
165 __asm__("bswapl %0 ; bswapl %1 ; xchgl %0,%1": "=r"(v.s.a), "=r"(v.s.b):"0"(v.s.a),
166 "1"(v.s.
167 b));
168 return v.u;
169 }
170 #elif defined(__GNUC__) && defined(__x86_64__)
171 static __inline__ Uint64
172 SDL_Swap64(Uint64 x)
173 {
174 __asm__("bswapq %0": "=r"(x):"0"(x));
175 return x;
176 }
177 #else
178 static __inline__ Uint64
179 SDL_Swap64(Uint64 x)
180 {
181 Uint32 hi, lo;
182
183 /* Separate into high and low 32-bit values and swap them */
184 lo = SDL_static_cast(Uint32, x & 0xFFFFFFFF);
185 x >>= 32;
186 hi = SDL_static_cast(Uint32, x & 0xFFFFFFFF);
187 x = SDL_Swap32(lo);
188 x <<= 32;
189 x |= SDL_Swap32(hi);
190 return (x);
191 }
192 #endif
193 #else
194 /**
195 * This is mainly to keep compilers from complaining in SDL code.
196 * If there is no real 64-bit datatype, then compilers will complain about
197 * the fake 64-bit datatype that SDL provides when it compiles user code.
198 */
199 #define SDL_Swap64(X) (X)
200 #endif /* SDL_HAS_64BIT_TYPE */
201
202
203 static __inline__ float
204 SDL_SwapFloat(float x)
205 {
206 union
207 {
208 float f;
209 Uint32 ui32;
210 } swapper;
211 swapper.f = x;
212 swapper.ui32 = SDL_Swap32(swapper.ui32);
213 return swapper.f;
214 }
215
216
217 /**
218 * \name Swap to native
219 * Byteswap item from the specified endianness to the native endianness.
220 */
221 /*@{*/
222 #if SDL_BYTEORDER == SDL_LIL_ENDIAN
223 #define SDL_SwapLE16(X) (X)
224 #define SDL_SwapLE32(X) (X)
225 #define SDL_SwapLE64(X) (X)
226 #define SDL_SwapFloatLE(X) (X)
227 #define SDL_SwapBE16(X) SDL_Swap16(X)
228 #define SDL_SwapBE32(X) SDL_Swap32(X)
229 #define SDL_SwapBE64(X) SDL_Swap64(X)
230 #define SDL_SwapFloatBE(X) SDL_SwapFloat(X)
231 #else
232 #define SDL_SwapLE16(X) SDL_Swap16(X)
233 #define SDL_SwapLE32(X) SDL_Swap32(X)
234 #define SDL_SwapLE64(X) SDL_Swap64(X)
235 #define SDL_SwapFloatLE(X) SDL_SwapFloat(X)
236 #define SDL_SwapBE16(X) (X)
237 #define SDL_SwapBE32(X) (X)
238 #define SDL_SwapBE64(X) (X)
239 #define SDL_SwapFloatBE(X) (X)
240 #endif
241 /*@}*//*Swap to native*/
242
243 /* Ends C function definitions when using C++ */
244 #ifdef __cplusplus
245 /* *INDENT-OFF* */
246 }
247 /* *INDENT-ON* */
248 #endif
249 #include "close_code.h"
250
251 #endif /* _SDL_endian_h */
252
253 /* vi: set ts=4 sw=4 expandtab: */