On Thu, Mar 12, 2026 at 11:43 PM James Wainwright <[email protected]> wrote: > > From: Emmanuel Blot <[email protected]> > > 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 <[email protected]>
Please keep previous tags in new versions Reviewed-by: Alistair Francis <[email protected]> Alistair > --- > include/qemu/crc32.h | 18 +++++++++ > include/qemu/crc32c.h | 1 + > util/crc32.c | 85 +++++++++++++++++++++++++++++++++++++++++++ > util/crc32c.c | 4 +- > util/meson.build | 1 + > 5 files changed, 107 insertions(+), 2 deletions(-) > create mode 100644 include/qemu/crc32.h > create mode 100644 util/crc32.c > > diff --git a/include/qemu/crc32.h b/include/qemu/crc32.h > new file mode 100644 > index 0000000000..a320151acc > --- /dev/null > +++ b/include/qemu/crc32.h > @@ -0,0 +1,18 @@ > +/* > + * CRC32 Checksum > + * > + * Copyright (c) 2026 QEMU contributors > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms of the GNU General Public License as published by the Free > + * Software Foundation; either version 2 of the License, or (at your option) > + * any later version. > + * > + */ > + > +#ifndef QEMU_CRC32_H > +#define QEMU_CRC32_H > + > +extern const uint32_t crc32_table[256]; > + > +#endif > diff --git a/include/qemu/crc32c.h b/include/qemu/crc32c.h > index 88b4d2b3b3..3d5ba189ef 100644 > --- a/include/qemu/crc32c.h > +++ b/include/qemu/crc32c.h > @@ -28,6 +28,7 @@ > #ifndef QEMU_CRC32C_H > #define QEMU_CRC32C_H > > +extern const uint32_t crc32c_table[256]; > > uint32_t crc32c(uint32_t crc, const uint8_t *data, unsigned int length); > uint32_t iov_crc32c(uint32_t crc, const struct iovec *iov, size_t iov_cnt); > diff --git a/util/crc32.c b/util/crc32.c > new file mode 100644 > index 0000000000..590dd6e3a2 > --- /dev/null > +++ b/util/crc32.c > @@ -0,0 +1,85 @@ > +/* > + * Constants for computing CRC32 checksums > + * > + * Copyright (c) 2026 QEMU contributors > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms of the GNU General Public License as published by the Free > + * Software Foundation; either version 2 of the License, or (at your option) > + * any later version. > + * > + */ > + > +#include "qemu/osdep.h" > +#include "qemu/crc32.h" > + > +/* > + * CRC-32 table (reversed; polynomial 0xEDB88320). > + */ > + > +const uint32_t crc32_table[256] = { > + 0x00000000u, 0x77073096u, 0xee0e612cu, 0x990951bau, > + 0x076dc419u, 0x706af48fu, 0xe963a535u, 0x9e6495a3u, > + 0x0edb8832u, 0x79dcb8a4u, 0xe0d5e91eu, 0x97d2d988u, > + 0x09b64c2bu, 0x7eb17cbdu, 0xe7b82d07u, 0x90bf1d91u, > + 0x1db71064u, 0x6ab020f2u, 0xf3b97148u, 0x84be41deu, > + 0x1adad47du, 0x6ddde4ebu, 0xf4d4b551u, 0x83d385c7u, > + 0x136c9856u, 0x646ba8c0u, 0xfd62f97au, 0x8a65c9ecu, > + 0x14015c4fu, 0x63066cd9u, 0xfa0f3d63u, 0x8d080df5u, > + 0x3b6e20c8u, 0x4c69105eu, 0xd56041e4u, 0xa2677172u, > + 0x3c03e4d1u, 0x4b04d447u, 0xd20d85fdu, 0xa50ab56bu, > + 0x35b5a8fau, 0x42b2986cu, 0xdbbbc9d6u, 0xacbcf940u, > + 0x32d86ce3u, 0x45df5c75u, 0xdcd60dcfu, 0xabd13d59u, > + 0x26d930acu, 0x51de003au, 0xc8d75180u, 0xbfd06116u, > + 0x21b4f4b5u, 0x56b3c423u, 0xcfba9599u, 0xb8bda50fu, > + 0x2802b89eu, 0x5f058808u, 0xc60cd9b2u, 0xb10be924u, > + 0x2f6f7c87u, 0x58684c11u, 0xc1611dabu, 0xb6662d3du, > + 0x76dc4190u, 0x01db7106u, 0x98d220bcu, 0xefd5102au, > + 0x71b18589u, 0x06b6b51fu, 0x9fbfe4a5u, 0xe8b8d433u, > + 0x7807c9a2u, 0x0f00f934u, 0x9609a88eu, 0xe10e9818u, > + 0x7f6a0dbbu, 0x086d3d2du, 0x91646c97u, 0xe6635c01u, > + 0x6b6b51f4u, 0x1c6c6162u, 0x856530d8u, 0xf262004eu, > + 0x6c0695edu, 0x1b01a57bu, 0x8208f4c1u, 0xf50fc457u, > + 0x65b0d9c6u, 0x12b7e950u, 0x8bbeb8eau, 0xfcb9887cu, > + 0x62dd1ddfu, 0x15da2d49u, 0x8cd37cf3u, 0xfbd44c65u, > + 0x4db26158u, 0x3ab551ceu, 0xa3bc0074u, 0xd4bb30e2u, > + 0x4adfa541u, 0x3dd895d7u, 0xa4d1c46du, 0xd3d6f4fbu, > + 0x4369e96au, 0x346ed9fcu, 0xad678846u, 0xda60b8d0u, > + 0x44042d73u, 0x33031de5u, 0xaa0a4c5fu, 0xdd0d7cc9u, > + 0x5005713cu, 0x270241aau, 0xbe0b1010u, 0xc90c2086u, > + 0x5768b525u, 0x206f85b3u, 0xb966d409u, 0xce61e49fu, > + 0x5edef90eu, 0x29d9c998u, 0xb0d09822u, 0xc7d7a8b4u, > + 0x59b33d17u, 0x2eb40d81u, 0xb7bd5c3bu, 0xc0ba6cadu, > + 0xedb88320u, 0x9abfb3b6u, 0x03b6e20cu, 0x74b1d29au, > + 0xead54739u, 0x9dd277afu, 0x04db2615u, 0x73dc1683u, > + 0xe3630b12u, 0x94643b84u, 0x0d6d6a3eu, 0x7a6a5aa8u, > + 0xe40ecf0bu, 0x9309ff9du, 0x0a00ae27u, 0x7d079eb1u, > + 0xf00f9344u, 0x8708a3d2u, 0x1e01f268u, 0x6906c2feu, > + 0xf762575du, 0x806567cbu, 0x196c3671u, 0x6e6b06e7u, > + 0xfed41b76u, 0x89d32be0u, 0x10da7a5au, 0x67dd4accu, > + 0xf9b9df6fu, 0x8ebeeff9u, 0x17b7be43u, 0x60b08ed5u, > + 0xd6d6a3e8u, 0xa1d1937eu, 0x38d8c2c4u, 0x4fdff252u, > + 0xd1bb67f1u, 0xa6bc5767u, 0x3fb506ddu, 0x48b2364bu, > + 0xd80d2bdau, 0xaf0a1b4cu, 0x36034af6u, 0x41047a60u, > + 0xdf60efc3u, 0xa867df55u, 0x316e8eefu, 0x4669be79u, > + 0xcb61b38cu, 0xbc66831au, 0x256fd2a0u, 0x5268e236u, > + 0xcc0c7795u, 0xbb0b4703u, 0x220216b9u, 0x5505262fu, > + 0xc5ba3bbeu, 0xb2bd0b28u, 0x2bb45a92u, 0x5cb36a04u, > + 0xc2d7ffa7u, 0xb5d0cf31u, 0x2cd99e8bu, 0x5bdeae1du, > + 0x9b64c2b0u, 0xec63f226u, 0x756aa39cu, 0x026d930au, > + 0x9c0906a9u, 0xeb0e363fu, 0x72076785u, 0x05005713u, > + 0x95bf4a82u, 0xe2b87a14u, 0x7bb12baeu, 0x0cb61b38u, > + 0x92d28e9bu, 0xe5d5be0du, 0x7cdcefb7u, 0x0bdbdf21u, > + 0x86d3d2d4u, 0xf1d4e242u, 0x68ddb3f8u, 0x1fda836eu, > + 0x81be16cdu, 0xf6b9265bu, 0x6fb077e1u, 0x18b74777u, > + 0x88085ae6u, 0xff0f6a70u, 0x66063bcau, 0x11010b5cu, > + 0x8f659effu, 0xf862ae69u, 0x616bffd3u, 0x166ccf45u, > + 0xa00ae278u, 0xd70dd2eeu, 0x4e048354u, 0x3903b3c2u, > + 0xa7672661u, 0xd06016f7u, 0x4969474du, 0x3e6e77dbu, > + 0xaed16a4au, 0xd9d65adcu, 0x40df0b66u, 0x37d83bf0u, > + 0xa9bcae53u, 0xdebb9ec5u, 0x47b2cf7fu, 0x30b5ffe9u, > + 0xbdbdf21cu, 0xcabac28au, 0x53b39330u, 0x24b4a3a6u, > + 0xbad03605u, 0xcdd70693u, 0x54de5729u, 0x23d967bfu, > + 0xb3667a2eu, 0xc4614ab8u, 0x5d681b02u, 0x2a6f2b94u, > + 0xb40bbe37u, 0xc30c8ea1u, 0x5a05df1bu, 0x2d02ef8du > +}; > diff --git a/util/crc32c.c b/util/crc32c.c > index ea7f345de8..f40597f80d 100644 > --- a/util/crc32c.c > +++ b/util/crc32c.c > @@ -1,7 +1,7 @@ > /* > * Castagnoli CRC32C Checksum Algorithm > * > - * Polynomial: 0x11EDC6F41 > + * Polynomial: 0x1EDC6F41 > * > * Castagnoli93: Guy Castagnoli and Stefan Braeuer and Martin Herrman > * "Optimization of Cyclic Redundancy-Check Codes with 24 > @@ -37,7 +37,7 @@ > * reflect output bytes = true > */ > > -static const uint32_t crc32c_table[256] = { > +const uint32_t crc32c_table[256] = { > 0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L, > 0xC79A971FL, 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL, > 0x8AD958CFL, 0x78B2DBCCL, 0x6BE22838L, 0x9989AB3BL, > diff --git a/util/meson.build b/util/meson.build > index e7a2a2a64c..d5789b1316 100644 > --- a/util/meson.build > +++ b/util/meson.build > @@ -44,6 +44,7 @@ util_ss.add(files('id.c')) > util_ss.add(files('qemu-config.c', 'notify.c')) > util_ss.add(files('qemu-option.c', 'qemu-progress.c')) > util_ss.add(files('keyval.c')) > +util_ss.add(files('crc32.c')) > util_ss.add(files('crc32c.c')) > util_ss.add(files('uuid.c')) > util_ss.add(files('getauxval.c')) > -- > 2.48.1 > >
