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3d66317189
1. Add normal and reflected bits order functions for ISO format and Jones coefficients format. 2. Add a multi-binary macro for crc64 functions. 3. In order to decrease number of repeated test.c and perf.c files, using crc64_funcs_test.c and cr crc64_funcs_perf.c. 4. Add crc64_example.c to take the demonstration role. Change-Id: Icb8c14f1a84cd98f58eb12206ca605dea8a2cefb Signed-off-by: Xiaodong Liu <xiaodong.liu@intel.com>
160 lines
5.0 KiB
C
160 lines
5.0 KiB
C
/**********************************************************************
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Copyright(c) 2011-2016 Intel Corporation All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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* Neither the name of Intel Corporation nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**********************************************************************/
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#include <stdlib.h>
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#include "crc64.h"
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#define MAX_ITER 8
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// crc64_ecma baseline function
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// Slow crc64 from the definition. Can be sped up with a lookup table.
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uint64_t crc64_ecma_refl_base(uint64_t seed, const uint8_t * buf, uint64_t len)
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{
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uint64_t rem = ~seed;
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unsigned int i, j;
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uint64_t poly = 0xC96C5795D7870F42ULL; // ECMA-182 standard reflected
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for (i = 0; i < len; i++) {
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rem = rem ^ (uint64_t) buf[i];
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for (j = 0; j < MAX_ITER; j++) {
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rem = (rem & 0x1ULL ? poly : 0) ^ (rem >> 1);
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}
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}
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return ~rem;
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}
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uint64_t crc64_ecma_norm_base(uint64_t seed, const uint8_t * buf, uint64_t len)
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{
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uint64_t rem = ~seed;
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unsigned int i, j;
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uint64_t poly = 0x42F0E1EBA9EA3693ULL; // ECMA-182 standard
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for (i = 0; i < len; i++) {
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rem = rem ^ ((uint64_t) buf[i] << 56);
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for (j = 0; j < MAX_ITER; j++) {
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rem = (rem & 0x8000000000000000ULL ? poly : 0) ^ (rem << 1);
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}
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}
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return ~rem;
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}
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// crc64_iso baseline function
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// Slow crc64 from the definition. Can be sped up with a lookup table.
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uint64_t crc64_iso_refl_base(uint64_t seed, const uint8_t * buf, uint64_t len)
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{
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uint64_t rem = ~seed;
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unsigned int i, j;
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uint64_t poly = 0xD800000000000000ULL; // ISO standard reflected
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for (i = 0; i < len; i++) {
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rem = rem ^ (uint64_t) buf[i];
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for (j = 0; j < MAX_ITER; j++) {
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rem = (rem & 0x1ULL ? poly : 0) ^ (rem >> 1);
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}
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}
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return ~rem;
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}
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uint64_t crc64_iso_norm_base(uint64_t seed, const uint8_t * buf, uint64_t len)
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{
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uint64_t rem = ~seed;
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unsigned int i, j;
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uint64_t poly = 0x000000000000001BULL; // ISO standard
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for (i = 0; i < len; i++) {
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rem = rem ^ ((uint64_t) buf[i] << 56);
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for (j = 0; j < MAX_ITER; j++) {
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rem = (rem & 0x8000000000000000ULL ? poly : 0) ^ (rem << 1);
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}
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}
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return ~rem;
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}
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// crc64_jones baseline function
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// Slow crc64 from the definition. Can be sped up with a lookup table.
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uint64_t crc64_jones_refl_base(uint64_t seed, const uint8_t * buf, uint64_t len)
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{
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uint64_t rem = ~seed;
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unsigned int i, j;
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uint64_t poly = 0x95ac9329ac4bc9b5ULL; // Jones coefficients reflected
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for (i = 0; i < len; i++) {
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rem = rem ^ (uint64_t) buf[i];
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for (j = 0; j < MAX_ITER; j++) {
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rem = (rem & 0x1ULL ? poly : 0) ^ (rem >> 1);
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}
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}
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return ~rem;
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}
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uint64_t crc64_jones_norm_base(uint64_t seed, const uint8_t * buf, uint64_t len)
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{
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uint64_t rem = ~seed;
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unsigned int i, j;
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uint64_t poly = 0xad93d23594c935a9ULL; // Jones coefficients
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for (i = 0; i < len; i++) {
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rem = rem ^ ((uint64_t) buf[i] << 56);
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for (j = 0; j < MAX_ITER; j++) {
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rem = (rem & 0x8000000000000000ULL ? poly : 0) ^ (rem << 1);
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}
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}
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return ~rem;
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}
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struct slver {
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unsigned short snum;
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unsigned char ver;
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unsigned char core;
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};
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struct slver crc64_ecma_refl_base_slver_0000001c;
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struct slver crc64_ecma_refl_base_slver = { 0x001c, 0x00, 0x00 };
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struct slver crc64_ecma_norm_base_slver_00000019;
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struct slver crc64_ecma_norm_base_slver = { 0x0019, 0x00, 0x00 };
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struct slver crc64_iso_refl_base_slver_00000022;
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struct slver crc64_iso_refl_base_slver = { 0x0022, 0x00, 0x00 };
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struct slver crc64_iso_norm_base_slver_0000001f;
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struct slver crc64_iso_norm_base_slver = { 0x001f, 0x00, 0x00 };
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struct slver crc64_jones_refl_base_slver_00000028;
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struct slver crc64_jones_refl_base_slver = { 0x0028, 0x00, 0x00 };
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struct slver crc64_jones_norm_base_slver_00000025;
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struct slver crc64_jones_norm_base_slver = { 0x0025, 0x00, 0x00 };
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