/* Copyright (C) 2010-2018 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 #include #include #include #include #if defined(_MSC_VER) && !defined(_XBOX) #if (_MSC_VER > 1310) #include #endif #endif RETRO_BEGIN_DECLS /* Count Leading Zero, unsigned 16bit input value */ static INLINE unsigned compat_clz_u16(uint16_t val) { #if defined(__GNUC__) && !defined(PS2) 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 && !defined(_XBOX) && !defined(__WINRT__) 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