text: /* Copyright  (C) 2010-2016 The RetroArch team
   *
   * ---------------------------------------------------------------------------------------
   * The following license statement only applies to this file (intrinsics.h).
   * ---------------------------------------------------------------------------------------
   *
   * Permission is hereby granted, free of charge,
   * to any person obtaining a copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation the rights to
   * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
   * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
   * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
   * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
   * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  
  #ifndef __LIBRETRO_SDK_COMPAT_INTRINSICS_H
  #define __LIBRETRO_SDK_COMPAT_INTRINSICS_H
  
  #include <stdint.h>
  #include <stddef.h>
  #include <string.h>
  
  #include <retro_common_api.h>
  #include <retro_inline.h>
  
  #ifdef _MSC_VER
  #if (_MSC_VER > 1310)
  #include <intrin.h>
  #endif
  #endif
  
  RETRO_BEGIN_DECLS
  
  /* Count Leading Zero, unsigned 16bit input value */
  static INLINE unsigned compat_clz_u16(uint16_t val)
  {
  #ifdef __GNUC__
     return __builtin_clz(val << 16 | 0x8000);
  #else
     unsigned ret = 0;
  
     while(!(val & 0x8000) && ret < 16)
     {
        val <<= 1;
        ret++;
     }
  
     return ret;
  #endif
  }
  
  /* Count Trailing Zero */
  static INLINE int compat_ctz(unsigned x)
  {
  #if defined(__GNUC__) && !defined(RARCH_CONSOLE)
     return __builtin_ctz(x);
  #elif _MSC_VER >= 1400
     unsigned long r = 0;
     _BitScanReverse((unsigned long*)&r, x);
     return (int)r;
  #else
  /* Only checks at nibble granularity, 
   * because that's what we need. */
     if (x & 0x000f)
        return 0;
     if (x & 0x00f0)
        return 4;
     if (x & 0x0f00)
        return 8;
     if (x & 0xf000)
        return 12;
     return 16;
  #endif
  }
  
  RETRO_END_DECLS
  
  #endif
  