reactos/include/crt/mingw32/intrin_arm.h

   1 /*
   2         Compatibility <intrin.h> header for GCC -- GCC equivalents of intrinsic
   3         Microsoft Visual C++ functions. Originally developed for the ReactOS
   4         (<http://www.reactos.org/>) and TinyKrnl (<http://www.tinykrnl.org/>)
   5         projects.
   6
   7         Copyright (c) 2006 KJK::Hyperion <hackbunny@reactos.com>
   8
   9         Permission is hereby granted, free of charge, to any person obtaining a
  10         copy of this software and associated documentation files (the "Software"),
  11         to deal in the Software without restriction, including without limitation
  12         the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13         and/or sell copies of the Software, and to permit persons to whom the
  14         Software is furnished to do so, subject to the following conditions:
  15
  16         The above copyright notice and this permission notice shall be included in
  17         all copies or substantial portions of the Software.
  18
  19         THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20         IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21         FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22         AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23         LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  24         FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  25         DEALINGS IN THE SOFTWARE.
  26 */
  27
  28 #ifndef KJK_INTRIN_ARM_H_
  29 #define KJK_INTRIN_ARM_H_
  30
  31 #ifndef __GNUC__
  32 #error Unsupported compiler
  33 #endif
  34
  35 #define _ReturnAddress() (__builtin_return_address(0))
  36 #define _ReadWriteBarrier() __sync_synchronize()
  37
  38 __INTRIN_INLINE unsigned short _byteswap_ushort(unsigned short value)
  39 {
  40         return (value >> 8) || (value & 0xff);
  41 }
  42
  43 __INTRIN_INLINE unsigned _CountLeadingZeros(long Mask)
  44 {
  45     return Mask ? __builtin_clz(Mask) : 32;
  46 }
  47
  48 __INTRIN_INLINE unsigned _CountTrailingZeros(long Mask)
  49 {
  50     return Mask ? __builtin_ctz(Mask) : 32;
  51 }
  52
  53 __INTRIN_INLINE unsigned char _BitScanForward(unsigned long * const Index, const unsigned long Mask)
  54 {
  55         *Index = __builtin_ctz(Mask);
  56         return Mask ? 1 : 0;
  57 }
  58
  59 __INTRIN_INLINE char _InterlockedCompareExchange8(volatile char * const Destination, const char Exchange, const char Comperand)
  60 {
  61         return __sync_val_compare_and_swap(Destination, Comperand, Exchange);
  62 }
  63
  64 __INTRIN_INLINE short _InterlockedCompareExchange16(volatile short * const Destination, const short Exchange, const short Comperand)
  65 {
  66         return __sync_val_compare_and_swap(Destination, Comperand, Exchange);
  67 }
  68
  69 __INTRIN_INLINE long _InterlockedExchangeAdd16(volatile short * const Addend, const short Value)
  70 {
  71         return __sync_fetch_and_add(Addend, Value);
  72 }
  73
  74 __INTRIN_INLINE long _InterlockedCompareExchange(volatile long * const dest, const long exch, const long comp)
  75 {
  76         long a, b;
  77
  78         __asm__ __volatile__ (    "0:\n\t"
  79                           "ldr %1, [%2]\n\t"
  80                           "cmp %1, %4\n\t"
  81                           "bne 1f\n\t"
  82                           "swp %0, %3, [%2]\n\t"
  83                           "cmp %0, %1\n\t"
  84                           "swpne %3, %0, [%2]\n\t"
  85                           "bne 0b\n\t"
  86                           "1:"
  87                           : "=&r" (a), "=&r" (b)
  88                           : "r" (dest), "r" (exch), "r" (comp)
  89                           : "cc", "memory");
  90
  91         return a;
  92 }
  93
  94 __INTRIN_INLINE long long _InterlockedCompareExchange64(volatile long long * const dest, const long long exch, const long long comp)
  95 {
  96     //
  97     // FIXME
  98     //
  99     long long result;
 100     result = *dest;
 101     if (*dest == comp) *dest = exch;
 102     return result;
 103 }
 104
 105 __INTRIN_INLINE void * _InterlockedCompareExchangePointer(void * volatile * const Destination, void * const Exchange, void * const Comperand)
 106 {
 107     return (void*)_InterlockedCompareExchange((volatile long* const)Destination, (const long)Exchange, (const long)Comperand);
 108 }
 109
 110
 111 __INTRIN_INLINE long _InterlockedExchangeAdd(volatile long * const dest, const long add)
 112 {
 113         long a, b, c;
 114
 115         __asm__ __volatile__ (  "0:\n\t"
 116                           "ldr %0, [%3]\n\t"
 117                           "add %1, %0, %4\n\t"
 118                           "swp %2, %1, [%3]\n\t"
 119                           "cmp %0, %2\n\t"
 120                           "swpne %1, %2, [%3]\n\t"
 121                           "bne 0b"
 122                           : "=&r" (a), "=&r" (b), "=&r" (c)
 123                           : "r" (dest), "r" (add)
 124                           : "cc", "memory");
 125
 126         return a;
 127 }
 128
 129 __INTRIN_INLINE long _InterlockedExchange(volatile long * const dest, const long exch)
 130 {
 131         long a;
 132
 133         __asm__ __volatile__ (  "swp %0, %2, [%1]"
 134                           : "=&r" (a)
 135                           : "r" (dest), "r" (exch));
 136
 137         return a;
 138 }
 139
 140
 141 __INTRIN_INLINE void * _InterlockedExchangePointer(void * volatile * const Target, void * const Value)
 142 {
 143     return (void *)_InterlockedExchange((volatile long * const)Target, (const long)Value);
 144 }
 145
 146
 147
 148 __INTRIN_INLINE unsigned char _BitScanReverse(unsigned long * const Index, const unsigned long Mask)
 149 {
 150     *Index = 31 - __builtin_clz(Mask);
 151         return Mask ? 1 : 0;
 152 }
 153
 154 __INTRIN_INLINE char _InterlockedAnd8(volatile char * const value, const char mask)
 155 {
 156         char x;
 157         char y;
 158
 159         y = *value;
 160
 161         do
 162         {
 163                 x = y;
 164                 y = _InterlockedCompareExchange8(value, x & mask, x);
 165         }
 166         while(y != x);
 167
 168         return y;
 169 }
 170
 171 __INTRIN_INLINE short _InterlockedAnd16(volatile short * const value, const short mask)
 172 {
 173         short x;
 174         short y;
 175
 176         y = *value;
 177
 178         do
 179         {
 180                 x = y;
 181                 y = _InterlockedCompareExchange16(value, x & mask, x);
 182         }
 183         while(y != x);
 184
 185         return y;
 186 }
 187
 188 __INTRIN_INLINE long _InterlockedAnd(volatile long * const value, const long mask)
 189 {
 190         long x;
 191         long y;
 192
 193         y = *value;
 194
 195         do
 196         {
 197                 x = y;
 198                 y = _InterlockedCompareExchange(value, x & mask, x);
 199         }
 200         while(y != x);
 201
 202         return y;
 203 }
 204
 205 __INTRIN_INLINE char _InterlockedOr8(volatile char * const value, const char mask)
 206 {
 207         char x;
 208         char y;
 209
 210         y = *value;
 211
 212         do
 213         {
 214                 x = y;
 215                 y = _InterlockedCompareExchange8(value, x | mask, x);
 216         }
 217         while(y != x);
 218
 219         return y;
 220 }
 221
 222 __INTRIN_INLINE short _InterlockedOr16(volatile short * const value, const short mask)
 223 {
 224         short x;
 225         short y;
 226
 227         y = *value;
 228
 229         do
 230         {
 231                 x = y;
 232                 y = _InterlockedCompareExchange16(value, x | mask, x);
 233         }
 234         while(y != x);
 235
 236         return y;
 237 }
 238
 239 __INTRIN_INLINE long _InterlockedOr(volatile long * const value, const long mask)
 240 {
 241         long x;
 242         long y;
 243
 244         y = *value;
 245
 246         do
 247         {
 248                 x = y;
 249                 y = _InterlockedCompareExchange(value, x | mask, x);
 250         }
 251         while(y != x);
 252
 253         return y;
 254 }
 255
 256 __INTRIN_INLINE char _InterlockedXor8(volatile char * const value, const char mask)
 257 {
 258         char x;
 259         char y;
 260
 261         y = *value;
 262
 263         do
 264         {
 265                 x = y;
 266                 y = _InterlockedCompareExchange8(value, x ^ mask, x);
 267         }
 268         while(y != x);
 269
 270         return y;
 271 }
 272
 273 __INTRIN_INLINE short _InterlockedXor16(volatile short * const value, const short mask)
 274 {
 275         short x;
 276         short y;
 277
 278         y = *value;
 279
 280         do
 281         {
 282                 x = y;
 283                 y = _InterlockedCompareExchange16(value, x ^ mask, x);
 284         }
 285         while(y != x);
 286
 287         return y;
 288 }
 289
 290 __INTRIN_INLINE long _InterlockedXor(volatile long * const value, const long mask)
 291 {
 292         long x;
 293         long y;
 294
 295         y = *value;
 296
 297         do
 298         {
 299                 x = y;
 300                 y = _InterlockedCompareExchange(value, x ^ mask, x);
 301         }
 302         while(y != x);
 303
 304         return y;
 305 }
 306
 307 __INTRIN_INLINE long _InterlockedDecrement(volatile long * const lpAddend)
 308 {
 309         return _InterlockedExchangeAdd(lpAddend, -1) - 1;
 310 }
 311
 312 __INTRIN_INLINE long _InterlockedIncrement(volatile long * const lpAddend)
 313 {
 314         return _InterlockedExchangeAdd(lpAddend, 1) + 1;
 315 }
 316
 317 __INTRIN_INLINE long _InterlockedDecrement16(volatile short * const lpAddend)
 318 {
 319         return _InterlockedExchangeAdd16(lpAddend, -1) - 1;
 320 }
 321
 322 __INTRIN_INLINE long _InterlockedIncrement16(volatile short * const lpAddend)
 323 {
 324         return _InterlockedExchangeAdd16(lpAddend, 1) + 1;
 325 }
 326
 327 __INTRIN_INLINE long _InterlockedAddLargeStatistic(volatile long long * const Addend, const long Value)
 328 {
 329     *Addend += Value;
 330     return Value;
 331 }
 332
 333 __INTRIN_INLINE void _disable(void)
 334 {
 335     __asm__ __volatile__
 336     (
 337      "cpsid i    @ __cli" : : : "memory", "cc"
 338     );
 339 }
 340
 341 __INTRIN_INLINE void _enable(void)
 342 {
 343     __asm__ __volatile__
 344     (
 345      "cpsie i    @ __sti" : : : "memory", "cc"
 346     );
 347 }
 348
 349 __INTRIN_INLINE unsigned char _interlockedbittestandset(volatile long * a, const long b)
 350 {
 351         return (_InterlockedOr(a, 1 << b) >> b) & 1;
 352 }
 353
 354 __INTRIN_INLINE unsigned char _interlockedbittestandreset(volatile long * a, const long b)
 355 {
 356         return (_InterlockedAnd(a, ~(1 << b)) >> b) & 1;
 357 }
 358
 359 #ifndef __MSVCRT__
 360 __INTRIN_INLINE unsigned int _rotl(const unsigned int value, int shift)
 361 {
 362         return (((value) << ((int)(shift))) | ((value) >> (32 - (int)(shift))));
 363 }
 364 #endif
 365
 366 #define _clz(a) \
 367 ({ ULONG __value, __arg = (a); \
 368 asm ("clz\t%0, %1": "=r" (__value): "r" (__arg)); \
 369 __value; })
 370
 371 #endif
 372 /* EOF */