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1d2276997e
These are needed for the xlrbr CRC32 instructions which pre-XOR the data into the CRC state before the instruction is executed, making the zlib crc32 and QEMU crc32c implementations inappropriate. https://github.com/riscv/riscv-bitmanip/releases/download/v0.93/bitmanip-0.93.pdf Signed-off-by: James Wainwright <james.wainwright@lowrisc.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-ID: <20260320134254.217123-2-james.wainwright@lowrisc.org> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
/*
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* Castagnoli CRC32C Checksum Algorithm
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*
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* Polynomial: 0x11EDC6F41
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*
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* Castagnoli93: Guy Castagnoli and Stefan Braeuer and Martin Herrman
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* "Optimization of Cyclic Redundancy-Check Codes with 24
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* and 32 Parity Bits",IEEE Transactions on Communication,
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* Volume 41, Number 6, June 1993
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*
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* Copyright (c) 2013 Red Hat, Inc.,
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*
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* Authors:
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* Jeff Cody <jcody@redhat.com>
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*
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* Based on the Linux kernel cryptographic crc32c module,
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*
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* Copyright (c) 2004 Cisco Systems, Inc.
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* Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#ifndef QEMU_CRC32C_H
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#define QEMU_CRC32C_H
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extern const uint32_t crc32c_table[256];
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uint32_t crc32c(uint32_t crc, const uint8_t *data, unsigned int length);
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uint32_t iov_crc32c(uint32_t crc, const struct iovec *iov, size_t iov_cnt);
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#endif
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