/* * Copyright (C) 2006-2009 Vincent Hanquez * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef BITFN_H #define BITFN_H #include #ifndef NO_INLINE_ASM /**********************************************************/ # if (defined(__i386__)) # define ARCH_HAS_SWAP32 static inline uint32_t bitfn_swap32(uint32_t a) { asm ("bswap %0" : "=r" (a) : "0" (a)); return a; } /**********************************************************/ # elif (defined(__arm__)) # define ARCH_HAS_SWAP32 static inline uint32_t bitfn_swap32(uint32_t a) { uint32_t tmp = a; asm volatile ("eor %1, %0, %0, ror #16\n" "bic %1, %1, #0xff0000\n" "mov %0, %0, ror #8\n" "eor %0, %0, %1, lsr #8\n" : "=r" (a), "=r" (tmp) : "0" (a), "1" (tmp)); return a; } /**********************************************************/ # elif defined(__x86_64__) # define ARCH_HAS_SWAP32 # define ARCH_HAS_SWAP64 static inline uint32_t bitfn_swap32(uint32_t a) { asm ("bswap %0" : "=r" (a) : "0" (a)); return a; } static inline uint64_t bitfn_swap64(uint64_t a) { asm ("bswap %0" : "=r" (a) : "0" (a)); return a; } # endif #endif /* NO_INLINE_ASM */ /**********************************************************/ #ifndef ARCH_HAS_ROL32 static inline uint32_t rol32(uint32_t word, uint32_t shift) { return (word << shift) | (word >> (32 - shift)); } #endif #ifndef ARCH_HAS_ROR32 static inline uint32_t ror32(uint32_t word, uint32_t shift) { return (word >> shift) | (word << (32 - shift)); } #endif #ifndef ARCH_HAS_ROL64 static inline uint64_t rol64(uint64_t word, uint32_t shift) { return (word << shift) | (word >> (64 - shift)); } #endif #ifndef ARCH_HAS_ROR64 static inline uint64_t ror64(uint64_t word, uint32_t shift) { return (word >> shift) | (word << (64 - shift)); } #endif #ifndef ARCH_HAS_SWAP32 static inline uint32_t bitfn_swap32(uint32_t a) { return (a << 24) | ((a & 0xff00) << 8) | ((a >> 8) & 0xff00) | (a >> 24); } #endif #ifndef ARCH_HAS_ARRAY_SWAP32 static inline void array_swap32(uint32_t *d, uint32_t *s, uint32_t nb) { while (nb--) *d++ = bitfn_swap32(*s++); } #endif #ifndef ARCH_HAS_SWAP64 static inline uint64_t bitfn_swap64(uint64_t a) { return ((uint64_t) bitfn_swap32((uint32_t) (a >> 32))) | (((uint64_t) bitfn_swap32((uint32_t) a)) << 32); } #endif #ifndef ARCH_HAS_ARRAY_SWAP64 static inline void array_swap64(uint64_t *d, uint64_t *s, uint32_t nb) { while (nb--) *d++ = bitfn_swap64(*s++); } #endif #ifndef ARCH_HAS_MEMORY_ZERO static inline void memory_zero(void *ptr, uint32_t len) { uint32_t *ptr32 = ptr; uint8_t *ptr8; int i; for (i = 0; i < len / 4; i++) *ptr32++ = 0; if (len % 4) { ptr8 = (uint8_t *) ptr32; for (i = len % 4; i >= 0; i--) ptr8[i] = 0; } } #endif #ifndef ARCH_HAS_ARRAY_COPY32 static inline void array_copy32(uint32_t *d, uint32_t *s, uint32_t nb) { while (nb--) *d++ = *s++; } #endif #ifndef ARCH_HAS_ARRAY_COPY64 static inline void array_copy64(uint64_t *d, uint64_t *s, uint32_t nb) { while (nb--) *d++ = *s++; } #endif #ifdef __MINGW32__ # define LITTLE_ENDIAN 1234 # define BYTE_ORDER LITTLE_ENDIAN #elif defined(__FreeBSD__) || defined(__DragonFly__) || defined(__NetBSD__) # include #elif defined(__OpenBSD__) || defined(__SVR4) # include #elif defined(__APPLE__) # include #elif defined( BSD ) && ( BSD >= 199103 ) # include #elif defined( __QNXNTO__ ) && defined( __LITTLEENDIAN__ ) # define LITTLE_ENDIAN 1234 # define BYTE_ORDER LITTLE_ENDIAN #elif defined( __QNXNTO__ ) && defined( __BIGENDIAN__ ) # define BIG_ENDIAN 1234 # define BYTE_ORDER BIG_ENDIAN #else # include #endif /* big endian to cpu */ #if LITTLE_ENDIAN == BYTE_ORDER # define be32_to_cpu(a) bitfn_swap32(a) # define cpu_to_be32(a) bitfn_swap32(a) # define le32_to_cpu(a) (a) # define cpu_to_le32(a) (a) # define be64_to_cpu(a) bitfn_swap64(a) # define cpu_to_be64(a) bitfn_swap64(a) # define le64_to_cpu(a) (a) # define cpu_to_le64(a) (a) # define cpu_to_le32_array(d, s, l) array_copy32(d, s, l) # define le32_to_cpu_array(d, s, l) array_copy32(d, s, l) # define cpu_to_be32_array(d, s, l) array_swap32(d, s, l) # define be32_to_cpu_array(d, s, l) array_swap32(d, s, l) # define cpu_to_le64_array(d, s, l) array_copy64(d, s, l) # define le64_to_cpu_array(d, s, l) array_copy64(d, s, l) # define cpu_to_be64_array(d, s, l) array_swap64(d, s, l) # define be64_to_cpu_array(d, s, l) array_swap64(d, s, l) # define ror32_be(a, s) rol32(a, s) # define rol32_be(a, s) ror32(a, s) # define ARCH_IS_LITTLE_ENDIAN #elif BIG_ENDIAN == BYTE_ORDER # define be32_to_cpu(a) (a) # define cpu_to_be32(a) (a) # define be64_to_cpu(a) (a) # define cpu_to_be64(a) (a) # define le64_to_cpu(a) bitfn_swap64(a) # define cpu_to_le64(a) bitfn_swap64(a) # define le32_to_cpu(a) bitfn_swap32(a) # define cpu_to_le32(a) bitfn_swap32(a) # define cpu_to_le32_array(d, s, l) array_swap32(d, s, l) # define le32_to_cpu_array(d, s, l) array_swap32(d, s, l) # define cpu_to_be32_array(d, s, l) array_copy32(d, s, l) # define be32_to_cpu_array(d, s, l) array_copy32(d, s, l) # define cpu_to_le64_array(d, s, l) array_swap64(d, s, l) # define le64_to_cpu_array(d, s, l) array_swap64(d, s, l) # define cpu_to_be64_array(d, s, l) array_copy64(d, s, l) # define be64_to_cpu_array(d, s, l) array_copy64(d, s, l) # define ror32_be(a, s) ror32(a, s) # define rol32_be(a, s) rol32(a, s) # define ARCH_IS_BIG_ENDIAN #else # error "endian not supported" #endif #endif /* !BITFN_H */