summaryrefslogtreecommitdiffstats
path: root/src/common/swap.h
blob: 72c50d7892ce45baf7274d78a6e0e38f9b7d06de (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
// Copyright (c) 2012- PPSSPP Project / Dolphin Project.

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0 or later versions.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License 2.0 for more details.

// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/

// Official git repository and contact information can be found at
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.

#pragma once

#if defined(_MSC_VER)
#include <cstdlib>
#elif defined(__linux__)
#include <byteswap.h>
#elif defined(__FreeBSD__)
#include <sys/endian.h>
#endif

#include <cstring>

#include "common/common_types.h"

// GCC 4.6+
#if __GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)

#if __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) && !defined(COMMON_LITTLE_ENDIAN)
#define COMMON_LITTLE_ENDIAN 1
#elif __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) && !defined(COMMON_BIG_ENDIAN)
#define COMMON_BIG_ENDIAN 1
#endif

// LLVM/clang
#elif __clang__

#if __LITTLE_ENDIAN__ && !defined(COMMON_LITTLE_ENDIAN)
#define COMMON_LITTLE_ENDIAN 1
#elif __BIG_ENDIAN__ && !defined(COMMON_BIG_ENDIAN)
#define COMMON_BIG_ENDIAN 1
#endif

// MSVC
#elif defined(_MSC_VER) && !defined(COMMON_BIG_ENDIAN) && !defined(COMMON_LITTLE_ENDIAN)

#define COMMON_LITTLE_ENDIAN 1
#endif

// Worst case, default to little endian.
#if !COMMON_BIG_ENDIAN && !COMMON_LITTLE_ENDIAN
#define COMMON_LITTLE_ENDIAN 1
#endif

namespace Common {

#ifdef _MSC_VER
inline u16 swap16(u16 _data) {
    return _byteswap_ushort(_data);
}
inline u32 swap32(u32 _data) {
    return _byteswap_ulong(_data);
}
inline u64 swap64(u64 _data) {
    return _byteswap_uint64(_data);
}
#elif _M_ARM
inline u16 swap16(u16 _data) {
    u32 data = _data;
    __asm__("rev16 %0, %1\n" : "=l"(data) : "l"(data));
    return (u16)data;
}
inline u32 swap32(u32 _data) {
    __asm__("rev %0, %1\n" : "=l"(_data) : "l"(_data));
    return _data;
}
inline u64 swap64(u64 _data) {
    return ((u64)swap32(_data) << 32) | swap32(_data >> 32);
}
#elif __linux__
inline u16 swap16(u16 _data) {
    return bswap_16(_data);
}
inline u32 swap32(u32 _data) {
    return bswap_32(_data);
}
inline u64 swap64(u64 _data) {
    return bswap_64(_data);
}
#elif __APPLE__
inline __attribute__((always_inline)) u16 swap16(u16 _data) {
    return (_data >> 8) | (_data << 8);
}
inline __attribute__((always_inline)) u32 swap32(u32 _data) {
    return __builtin_bswap32(_data);
}
inline __attribute__((always_inline)) u64 swap64(u64 _data) {
    return __builtin_bswap64(_data);
}
#elif __FreeBSD__
inline u16 swap16(u16 _data) {
    return bswap16(_data);
}
inline u32 swap32(u32 _data) {
    return bswap32(_data);
}
inline u64 swap64(u64 _data) {
    return bswap64(_data);
}
#else
// Slow generic implementation.
inline u16 swap16(u16 data) {
    return (data >> 8) | (data << 8);
}
inline u32 swap32(u32 data) {
    return (swap16(data) << 16) | swap16(data >> 16);
}
inline u64 swap64(u64 data) {
    return ((u64)swap32(data) << 32) | swap32(data >> 32);
}
#endif

inline float swapf(float f) {
    static_assert(sizeof(u32) == sizeof(float), "float must be the same size as uint32_t.");

    u32 value;
    std::memcpy(&value, &f, sizeof(u32));

    value = swap32(value);
    std::memcpy(&f, &value, sizeof(u32));

    return f;
}

inline double swapd(double f) {
    static_assert(sizeof(u64) == sizeof(double), "double must be the same size as uint64_t.");

    u64 value;
    std::memcpy(&value, &f, sizeof(u64));

    value = swap64(value);
    std::memcpy(&f, &value, sizeof(u64));

    return f;
}

} // Namespace Common

template <typename T, typename F>
struct swap_struct_t {
    typedef swap_struct_t<T, F> swapped_t;

protected:
    T value = T();

    static T swap(T v) {
        return F::swap(v);
    }

public:
    T const swap() const {
        return swap(value);
    }
    swap_struct_t() = default;
    swap_struct_t(const T& v) : value(swap(v)) {}

    template <typename S>
    swapped_t& operator=(const S& source) {
        value = swap((T)source);
        return *this;
    }

    operator s8() const {
        return (s8)swap();
    }
    operator u8() const {
        return (u8)swap();
    }
    operator s16() const {
        return (s16)swap();
    }
    operator u16() const {
        return (u16)swap();
    }
    operator s32() const {
        return (s32)swap();
    }
    operator u32() const {
        return (u32)swap();
    }
    operator s64() const {
        return (s64)swap();
    }
    operator u64() const {
        return (u64)swap();
    }
    operator float() const {
        return (float)swap();
    }
    operator double() const {
        return (double)swap();
    }

    // +v
    swapped_t operator+() const {
        return +swap();
    }
    // -v
    swapped_t operator-() const {
        return -swap();
    }

    // v / 5
    swapped_t operator/(const swapped_t& i) const {
        return swap() / i.swap();
    }
    template <typename S>
    swapped_t operator/(const S& i) const {
        return swap() / i;
    }

    // v * 5
    swapped_t operator*(const swapped_t& i) const {
        return swap() * i.swap();
    }
    template <typename S>
    swapped_t operator*(const S& i) const {
        return swap() * i;
    }

    // v + 5
    swapped_t operator+(const swapped_t& i) const {
        return swap() + i.swap();
    }
    template <typename S>
    swapped_t operator+(const S& i) const {
        return swap() + (T)i;
    }
    // v - 5
    swapped_t operator-(const swapped_t& i) const {
        return swap() - i.swap();
    }
    template <typename S>
    swapped_t operator-(const S& i) const {
        return swap() - (T)i;
    }

    // v += 5
    swapped_t& operator+=(const swapped_t& i) {
        value = swap(swap() + i.swap());
        return *this;
    }
    template <typename S>
    swapped_t& operator+=(const S& i) {
        value = swap(swap() + (T)i);
        return *this;
    }
    // v -= 5
    swapped_t& operator-=(const swapped_t& i) {
        value = swap(swap() - i.swap());
        return *this;
    }
    template <typename S>
    swapped_t& operator-=(const S& i) {
        value = swap(swap() - (T)i);
        return *this;
    }

    // ++v
    swapped_t& operator++() {
        value = swap(swap() + 1);
        return *this;
    }
    // --v
    swapped_t& operator--() {
        value = swap(swap() - 1);
        return *this;
    }

    // v++
    swapped_t operator++(int) {
        swapped_t old = *this;
        value = swap(swap() + 1);
        return old;
    }
    // v--
    swapped_t operator--(int) {
        swapped_t old = *this;
        value = swap(swap() - 1);
        return old;
    }
    // Comparaison
    // v == i
    bool operator==(const swapped_t& i) const {
        return swap() == i.swap();
    }
    template <typename S>
    bool operator==(const S& i) const {
        return swap() == i;
    }

    // v != i
    bool operator!=(const swapped_t& i) const {
        return swap() != i.swap();
    }
    template <typename S>
    bool operator!=(const S& i) const {
        return swap() != i;
    }

    // v > i
    bool operator>(const swapped_t& i) const {
        return swap() > i.swap();
    }
    template <typename S>
    bool operator>(const S& i) const {
        return swap() > i;
    }

    // v < i
    bool operator<(const swapped_t& i) const {
        return swap() < i.swap();
    }
    template <typename S>
    bool operator<(const S& i) const {
        return swap() < i;
    }

    // v >= i
    bool operator>=(const swapped_t& i) const {
        return swap() >= i.swap();
    }
    template <typename S>
    bool operator>=(const S& i) const {
        return swap() >= i;
    }

    // v <= i
    bool operator<=(const swapped_t& i) const {
        return swap() <= i.swap();
    }
    template <typename S>
    bool operator<=(const S& i) const {
        return swap() <= i;
    }

    // logical
    swapped_t operator!() const {
        return !swap();
    }

    // bitmath
    swapped_t operator~() const {
        return ~swap();
    }

    swapped_t operator&(const swapped_t& b) const {
        return swap() & b.swap();
    }
    template <typename S>
    swapped_t operator&(const S& b) const {
        return swap() & b;
    }
    swapped_t& operator&=(const swapped_t& b) {
        value = swap(swap() & b.swap());
        return *this;
    }
    template <typename S>
    swapped_t& operator&=(const S b) {
        value = swap(swap() & b);
        return *this;
    }

    swapped_t operator|(const swapped_t& b) const {
        return swap() | b.swap();
    }
    template <typename S>
    swapped_t operator|(const S& b) const {
        return swap() | b;
    }
    swapped_t& operator|=(const swapped_t& b) {
        value = swap(swap() | b.swap());
        return *this;
    }
    template <typename S>
    swapped_t& operator|=(const S& b) {
        value = swap(swap() | b);
        return *this;
    }

    swapped_t operator^(const swapped_t& b) const {
        return swap() ^ b.swap();
    }
    template <typename S>
    swapped_t operator^(const S& b) const {
        return swap() ^ b;
    }
    swapped_t& operator^=(const swapped_t& b) {
        value = swap(swap() ^ b.swap());
        return *this;
    }
    template <typename S>
    swapped_t& operator^=(const S& b) {
        value = swap(swap() ^ b);
        return *this;
    }

    template <typename S>
    swapped_t operator<<(const S& b) const {
        return swap() << b;
    }
    template <typename S>
    swapped_t& operator<<=(const S& b) const {
        value = swap(swap() << b);
        return *this;
    }

    template <typename S>
    swapped_t operator>>(const S& b) const {
        return swap() >> b;
    }
    template <typename S>
    swapped_t& operator>>=(const S& b) const {
        value = swap(swap() >> b);
        return *this;
    }

    // Member
    /** todo **/

    // Arithmetics
    template <typename S, typename T2, typename F2>
    friend S operator+(const S& p, const swapped_t v);

    template <typename S, typename T2, typename F2>
    friend S operator-(const S& p, const swapped_t v);

    template <typename S, typename T2, typename F2>
    friend S operator/(const S& p, const swapped_t v);

    template <typename S, typename T2, typename F2>
    friend S operator*(const S& p, const swapped_t v);

    template <typename S, typename T2, typename F2>
    friend S operator%(const S& p, const swapped_t v);

    // Arithmetics + assignements
    template <typename S, typename T2, typename F2>
    friend S operator+=(const S& p, const swapped_t v);

    template <typename S, typename T2, typename F2>
    friend S operator-=(const S& p, const swapped_t v);

    // Bitmath
    template <typename S, typename T2, typename F2>
    friend S operator&(const S& p, const swapped_t v);

    // Comparison
    template <typename S, typename T2, typename F2>
    friend bool operator<(const S& p, const swapped_t v);

    template <typename S, typename T2, typename F2>
    friend bool operator>(const S& p, const swapped_t v);

    template <typename S, typename T2, typename F2>
    friend bool operator<=(const S& p, const swapped_t v);

    template <typename S, typename T2, typename F2>
    friend bool operator>=(const S& p, const swapped_t v);

    template <typename S, typename T2, typename F2>
    friend bool operator!=(const S& p, const swapped_t v);

    template <typename S, typename T2, typename F2>
    friend bool operator==(const S& p, const swapped_t v);
};

// Arithmetics
template <typename S, typename T, typename F>
S operator+(const S& i, const swap_struct_t<T, F> v) {
    return i + v.swap();
}

template <typename S, typename T, typename F>
S operator-(const S& i, const swap_struct_t<T, F> v) {
    return i - v.swap();
}

template <typename S, typename T, typename F>
S operator/(const S& i, const swap_struct_t<T, F> v) {
    return i / v.swap();
}

template <typename S, typename T, typename F>
S operator*(const S& i, const swap_struct_t<T, F> v) {
    return i * v.swap();
}

template <typename S, typename T, typename F>
S operator%(const S& i, const swap_struct_t<T, F> v) {
    return i % v.swap();
}

// Arithmetics + assignements
template <typename S, typename T, typename F>
S& operator+=(S& i, const swap_struct_t<T, F> v) {
    i += v.swap();
    return i;
}

template <typename S, typename T, typename F>
S& operator-=(S& i, const swap_struct_t<T, F> v) {
    i -= v.swap();
    return i;
}

// Logical
template <typename S, typename T, typename F>
S operator&(const S& i, const swap_struct_t<T, F> v) {
    return i & v.swap();
}

template <typename S, typename T, typename F>
S operator&(const swap_struct_t<T, F> v, const S& i) {
    return (S)(v.swap() & i);
}

// Comparaison
template <typename S, typename T, typename F>
bool operator<(const S& p, const swap_struct_t<T, F> v) {
    return p < v.swap();
}
template <typename S, typename T, typename F>
bool operator>(const S& p, const swap_struct_t<T, F> v) {
    return p > v.swap();
}
template <typename S, typename T, typename F>
bool operator<=(const S& p, const swap_struct_t<T, F> v) {
    return p <= v.swap();
}
template <typename S, typename T, typename F>
bool operator>=(const S& p, const swap_struct_t<T, F> v) {
    return p >= v.swap();
}
template <typename S, typename T, typename F>
bool operator!=(const S& p, const swap_struct_t<T, F> v) {
    return p != v.swap();
}
template <typename S, typename T, typename F>
bool operator==(const S& p, const swap_struct_t<T, F> v) {
    return p == v.swap();
}

template <typename T>
struct swap_64_t {
    static T swap(T x) {
        return static_cast<T>(Common::swap64(x));
    }
};

template <typename T>
struct swap_32_t {
    static T swap(T x) {
        return static_cast<T>(Common::swap32(x));
    }
};

template <typename T>
struct swap_16_t {
    static T swap(T x) {
        return static_cast<T>(Common::swap16(x));
    }
};

template <typename T>
struct swap_float_t {
    static T swap(T x) {
        return static_cast<T>(Common::swapf(x));
    }
};

template <typename T>
struct swap_double_t {
    static T swap(T x) {
        return static_cast<T>(Common::swapd(x));
    }
};

#if COMMON_LITTLE_ENDIAN
typedef u32 u32_le;
typedef u16 u16_le;
typedef u64 u64_le;

typedef s32 s32_le;
typedef s16 s16_le;
typedef s64 s64_le;

typedef float float_le;
typedef double double_le;

typedef swap_struct_t<u64, swap_64_t<u64>> u64_be;
typedef swap_struct_t<s64, swap_64_t<s64>> s64_be;

typedef swap_struct_t<u32, swap_32_t<u32>> u32_be;
typedef swap_struct_t<s32, swap_32_t<s32>> s32_be;

typedef swap_struct_t<u16, swap_16_t<u16>> u16_be;
typedef swap_struct_t<s16, swap_16_t<s16>> s16_be;

typedef swap_struct_t<float, swap_float_t<float>> float_be;
typedef swap_struct_t<double, swap_double_t<double>> double_be;
#else

typedef swap_struct_t<u64, swap_64_t<u64>> u64_le;
typedef swap_struct_t<s64, swap_64_t<s64>> s64_le;

typedef swap_struct_t<u32, swap_32_t<u32>> u32_le;
typedef swap_struct_t<s32, swap_32_t<s32>> s32_le;

typedef swap_struct_t<u16, swap_16_t<u16>> u16_le;
typedef swap_struct_t<s16, swap_16_t<s16>> s16_le;

typedef swap_struct_t<float, swap_float_t<float>> float_le;
typedef swap_struct_t<double, swap_double_t<double>> double_le;

typedef u32 u32_be;
typedef u16 u16_be;
typedef u64 u64_be;

typedef s32 s32_be;
typedef s16 s16_be;
typedef s64 s64_be;

typedef float float_be;
typedef double double_be;

#endif