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Diffstat (limited to '')
-rw-r--r-- | src/crypto/isa-l/isa-l_crypto/rolling_hash/rolling_hashx_base.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/src/crypto/isa-l/isa-l_crypto/rolling_hash/rolling_hashx_base.c b/src/crypto/isa-l/isa-l_crypto/rolling_hash/rolling_hashx_base.c new file mode 100644 index 000000000..4197def0e --- /dev/null +++ b/src/crypto/isa-l/isa-l_crypto/rolling_hash/rolling_hashx_base.c @@ -0,0 +1,65 @@ +/********************************************************************** + Copyright(c) 2011-2017 Intel Corporation All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions + are met: + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * 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. + * Neither the name of Intel Corporation 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 + OWNER 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. +**********************************************************************/ + +#include <stdint.h> +#ifdef _MSC_VER +# define inline __inline +#endif + +inline int floor_pow2(uint32_t in) +{ + uint32_t x = in; + + while (in) { + x = in; + in &= (in - 1); + } + return x; +} + +inline uint32_t rol(uint32_t x, int i) +{ + return x << i | x >> (8 * sizeof(x) - i); +} + +uint32_t rolling_hashx_mask_gen(long mean, int shift) +{ + if (mean <= 2) + mean = 2; + + return rol(floor_pow2(mean) - 1, shift); +} + +struct slver { + uint16_t snum; + uint8_t ver; + uint8_t core; +}; +struct slver rolling_hashx_mask_gen_slver_00000260; +struct slver rolling_hashx_mask_gen_slver = { 0x0260, 0x00, 0x00 }; |