1 /* crc32c -- calculate and POSIX.2 checksum 2 Copyright (C) 92, 1995-1999 Free Software Foundation, Inc. 3 4 This program is free software; you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 2, or (at your option) 7 any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program; if not, write to the Free Software Foundation, 16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 17 18 #ifndef CRC32C_H 19 #define CRC32C_H 20 21 #include "../arch/arch.h" 22 23 extern uint32_t crc32c_sw(unsigned char const *, unsigned long); 24 extern int crc32c_intel_available; 25 26 #ifdef ARCH_HAVE_SSE4_2 27 extern uint32_t crc32c_intel(unsigned char const *, unsigned long); 28 extern void crc32c_intel_probe(void); 29 #else 30 #define crc32c_intel crc32c_sw 31 static inline void crc32c_intel_probe(void) 32 { 33 } 34 #endif 35 36 static inline uint32_t fio_crc32c(unsigned char const *buf, unsigned long len) 37 { 38 if (crc32c_intel_available) 39 return crc32c_intel(buf, len); 40 41 return crc32c_sw(buf, len); 42 } 43 44 #endif 45
