Edit
IABSD.fr/xenocara/lib/libdrm/util_math.h
jsg
- lib/libdrm/util_math.h
-
/* * Copyright 2014 Advanced Micro Devices, Inc. * * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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 _UTIL_MATH_H_ #define _UTIL_MATH_H_ #include <stdint.h> #define MIN2( A, B ) ( (A)<(B) ? (A) : (B) ) #define MAX2( A, B ) ( (A)>(B) ? (A) : (B) ) #define MAX3( A, B, C ) ((A) > (B) ? MAX2(A, C) : MAX2(B, C)) #define __align_mask(value, mask) (((value) + (mask)) & ~(mask)) #define ALIGN(value, alignment) __align_mask(value, (__typeof__(value))((alignment) - 1)) static inline unsigned util_last_bit64(uint64_t u) { #if defined(HAVE___BUILTIN_CLZLL) return u == 0 ? 0 : 64 - __builtin_clzll(u); #elif defined(_MSC_VER) && (_M_AMD64 || _M_ARM64 || _M_IA64) unsigned long index; if (_BitScanReverse64(&index, u)) return index + 1; else return 0; #else unsigned r = 0; while (u) { r++; u >>= 1; } return r; #endif } #endif /*_UTIL_MATH_H_*/