// Copyright (c) 2014-2020, The Monero Project // // All rights reserved. // // 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. // // 3. Neither the name of the copyright holder nor the names of its contributors may be // used to endorse or promote products derived from this software without specific // prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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. // // Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers #pragma once #include #include #include #include #ifndef _MSC_VER #include #endif #if defined(__ANDROID__) #include #endif #if defined(__sun) && defined(__SVR4) #include #endif #if defined(_MSC_VER) #include static inline uint32_t rol32(uint32_t x, int r) { static_assert(sizeof(uint32_t) == sizeof(unsigned int), "this code assumes 32-bit integers"); return _rotl(x, r); } static inline uint64_t rol64(uint64_t x, int r) { return _rotl64(x, r); } #else static inline uint32_t rol32(uint32_t x, int r) { return (x << (r & 31)) | (x >> (-r & 31)); } static inline uint64_t rol64(uint64_t x, int r) { return (x << (r & 63)) | (x >> (-r & 63)); } #endif static inline uint64_t hi_dword(uint64_t val) { return val >> 32; } static inline uint64_t lo_dword(uint64_t val) { return val & 0xFFFFFFFF; } static inline uint64_t mul128(uint64_t multiplier, uint64_t multiplicand, uint64_t *product_hi) { // multiplier = ab = a * 2^32 + b // multiplicand = cd = c * 2^32 + d // ab * cd = a * c * 2^64 + (a * d + b * c) * 2^32 + b * d uint64_t a = hi_dword(multiplier); uint64_t b = lo_dword(multiplier); uint64_t c = hi_dword(multiplicand); uint64_t d = lo_dword(multiplicand); uint64_t ac = a * c; uint64_t ad = a * d; uint64_t bc = b * c; uint64_t bd = b * d; uint64_t adbc = ad + bc; uint64_t adbc_carry = adbc < ad ? 1 : 0; // multiplier * multiplicand = product_hi * 2^64 + product_lo uint64_t product_lo = bd + (adbc << 32); uint64_t product_lo_carry = product_lo < bd ? 1 : 0; *product_hi = ac + (adbc >> 32) + (adbc_carry << 32) + product_lo_carry; assert(ac <= *product_hi); return product_lo; } static inline uint64_t div_with_reminder(uint64_t dividend, uint32_t divisor, uint32_t *remainder) { dividend |= ((uint64_t) *remainder) << 32; *remainder = dividend % divisor; return dividend / divisor; } // Long division with 2^32 base static inline uint32_t div128_32(uint64_t dividend_hi, uint64_t dividend_lo, uint32_t divisor, uint64_t *quotient_hi, uint64_t *quotient_lo) { uint64_t dividend_dwords[4]; uint32_t remainder = 0; dividend_dwords[3] = hi_dword(dividend_hi); dividend_dwords[2] = lo_dword(dividend_hi); dividend_dwords[1] = hi_dword(dividend_lo); dividend_dwords[0] = lo_dword(dividend_lo); *quotient_hi = div_with_reminder(dividend_dwords[3], divisor, &remainder) << 32; *quotient_hi |= div_with_reminder(dividend_dwords[2], divisor, &remainder); *quotient_lo = div_with_reminder(dividend_dwords[1], divisor, &remainder) << 32; *quotient_lo |= div_with_reminder(dividend_dwords[0], divisor, &remainder); return remainder; } // Long divisor with 2^64 base void div128_64(uint64_t dividend_hi, uint64_t dividend_lo, uint64_t divisor, uint64_t *quotient_hi, uint64_t *quotient_lo, uint64_t *remainder_hi, uint64_t *remainder_lo); static inline void add64clamp(uint64_t *value, uint64_t add) { static const uint64_t maxval = (uint64_t) -1; if (*value > maxval - add) *value = maxval; else *value += add; } static inline void sub64clamp(uint64_t *value, uint64_t sub) { if (*value < sub) *value = 0; else *value -= sub; } #define IDENT16(x) ((uint16_t) (x)) #define IDENT32(x) ((uint32_t) (x)) #define IDENT64(x) ((uint64_t) (x)) #define SWAP16(x) ((((uint16_t) (x) & 0x00ff) << 8) | \ (((uint16_t) (x) & 0xff00) >> 8)) #define SWAP32(x) ((((uint32_t) (x) & 0x000000ff) << 24) | \ (((uint32_t) (x) & 0x0000ff00) << 8) | \ (((uint32_t) (x) & 0x00ff0000) >> 8) | \ (((uint32_t) (x) & 0xff000000) >> 24)) #define SWAP64(x) ((((uint64_t) (x) & 0x00000000000000ff) << 56) | \ (((uint64_t) (x) & 0x000000000000ff00) << 40) | \ (((uint64_t) (x) & 0x0000000000ff0000) << 24) | \ (((uint64_t) (x) & 0x00000000ff000000) << 8) | \ (((uint64_t) (x) & 0x000000ff00000000) >> 8) | \ (((uint64_t) (x) & 0x0000ff0000000000) >> 24) | \ (((uint64_t) (x) & 0x00ff000000000000) >> 40) | \ (((uint64_t) (x) & 0xff00000000000000) >> 56)) static inline uint16_t ident16(uint16_t x) { return x; } static inline uint32_t ident32(uint32_t x) { return x; } static inline uint64_t ident64(uint64_t x) { return x; } #ifndef __OpenBSD__ # if defined(__ANDROID__) && defined(__swap16) && !defined(swap16) # define swap16 __swap16 # elif !defined(swap16) static inline uint16_t swap16(uint16_t x) { return ((x & 0x00ff) << 8) | ((x & 0xff00) >> 8); } # endif # if defined(__ANDROID__) && defined(__swap32) && !defined(swap32) # define swap32 __swap32 # elif !defined(swap32) static inline uint32_t swap32(uint32_t x) { x = ((x & 0x00ff00ff) << 8) | ((x & 0xff00ff00) >> 8); return (x << 16) | (x >> 16); } # endif # if defined(__ANDROID__) && defined(__swap64) && !defined(swap64) # define swap64 __swap64 # elif !defined(swap64) static inline uint64_t swap64(uint64_t x) { x = ((x & 0x00ff00ff00ff00ff) << 8) | ((x & 0xff00ff00ff00ff00) >> 8); x = ((x & 0x0000ffff0000ffff) << 16) | ((x & 0xffff0000ffff0000) >> 16); return (x << 32) | (x >> 32); } # endif #endif /* __OpenBSD__ */ #if defined(__GNUC__) #define UNUSED __attribute__((unused)) #else #define UNUSED #endif static inline void mem_inplace_ident(void *mem UNUSED, size_t n UNUSED) {} #undef UNUSED static inline void mem_inplace_swap16(void *mem, size_t n) { size_t i; for (i = 0; i < n; i++) { ((uint16_t *) mem)[i] = swap16(((const uint16_t *) mem)[i]); } } static inline void mem_inplace_swap32(void *mem, size_t n) { size_t i; for (i = 0; i < n; i++) { ((uint32_t *) mem)[i] = swap32(((const uint32_t *) mem)[i]); } } static inline void mem_inplace_swap64(void *mem, size_t n) { size_t i; for (i = 0; i < n; i++) { ((uint64_t *) mem)[i] = swap64(((const uint64_t *) mem)[i]); } } static inline void memcpy_ident16(void *dst, const void *src, size_t n) { memcpy(dst, src, 2 * n); } static inline void memcpy_ident32(void *dst, const void *src, size_t n) { memcpy(dst, src, 4 * n); } static inline void memcpy_ident64(void *dst, const void *src, size_t n) { memcpy(dst, src, 8 * n); } static inline void memcpy_swap16(void *dst, const void *src, size_t n) { size_t i; for (i = 0; i < n; i++) { ((uint16_t *) dst)[i] = swap16(((const uint16_t *) src)[i]); } } static inline void memcpy_swap32(void *dst, const void *src, size_t n) { size_t i; for (i = 0; i < n; i++) { ((uint32_t *) dst)[i] = swap32(((const uint32_t *) src)[i]); } } static inline void memcpy_swap64(void *dst, const void *src, size_t n) { size_t i; for (i = 0; i < n; i++) { ((uint64_t *) dst)[i] = swap64(((const uint64_t *) src)[i]); } } #ifdef _MSC_VER # define LITTLE_ENDIAN 1234 # define BIG_ENDIAN 4321 # define BYTE_ORDER LITTLE_ENDIAN #endif #if !defined(BYTE_ORDER) || !defined(LITTLE_ENDIAN) || !defined(BIG_ENDIAN) static_assert(false, "BYTE_ORDER is undefined. Perhaps, GNU extensions are not enabled"); #endif #if BYTE_ORDER == LITTLE_ENDIAN #define SWAP16LE IDENT16 #define SWAP16BE SWAP16 #define swap16le ident16 #define swap16be swap16 #define mem_inplace_swap16le mem_inplace_ident #define mem_inplace_swap16be mem_inplace_swap16 #define memcpy_swap16le memcpy_ident16 #define memcpy_swap16be memcpy_swap16 #define SWAP32LE IDENT32 #define SWAP32BE SWAP32 #define swap32le ident32 #define swap32be swap32 #define mem_inplace_swap32le mem_inplace_ident #define mem_inplace_swap32be mem_inplace_swap32 #define memcpy_swap32le memcpy_ident32 #define memcpy_swap32be memcpy_swap32 #define SWAP64LE IDENT64 #define SWAP64BE SWAP64 #define swap64le ident64 #define swap64be swap64 #define mem_inplace_swap64le mem_inplace_ident #define mem_inplace_swap64be mem_inplace_swap64 #define memcpy_swap64le memcpy_ident64 #define memcpy_swap64be memcpy_swap64 #endif #if BYTE_ORDER == BIG_ENDIAN #define SWAP16BE IDENT16 #define SWAP16LE SWAP16 #define swap16be ident16 #define swap16le swap16 #define mem_inplace_swap16be mem_inplace_ident #define mem_inplace_swap16le mem_inplace_swap16 #define memcpy_swap16be memcpy_ident16 #define memcpy_swap16le memcpy_swap16 #define SWAP32BE IDENT32 #define SWAP32LE SWAP32 #define swap32be ident32 #define swap32le swap32 #define mem_inplace_swap32be mem_inplace_ident #define mem_inplace_swap32le mem_inplace_swap32 #define memcpy_swap32be memcpy_ident32 #define memcpy_swap32le memcpy_swap32 #define SWAP64BE IDENT64 #define SWAP64LE SWAP64 #define swap64be ident64 #define swap64le swap64 #define mem_inplace_swap64be mem_inplace_ident #define mem_inplace_swap64le mem_inplace_swap64 #define memcpy_swap64be memcpy_ident64 #define memcpy_swap64le memcpy_swap64 #endif