diff options
Diffstat (limited to 'library/include/mipi_syst/crc32.h')
| -rw-r--r-- | library/include/mipi_syst/crc32.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/library/include/mipi_syst/crc32.h b/library/include/mipi_syst/crc32.h new file mode 100644 index 0000000..108de54 --- /dev/null +++ b/library/include/mipi_syst/crc32.h @@ -0,0 +1,138 @@ +/* +Copyright (c) 2018, MIPI Alliance, Inc. +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 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 +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. +*/ + +/* + * Contributors: + * Norbert Schulz (Intel Corporation) - Initial API and implementation + */ + +/* Defines for CRC32C computation */ + +#ifndef MIPI_SYST_CRC32_INCLUDED +#define MIPI_SYST_CRC32_INCLUDED + +#ifdef __cplusplus +extern "C" { +#endif + + +#if !defined(MIPI_SYST_PCFG_ENABLE_CHECKSUM) + +#define MIPI_SYST_CRC32_INIT(v) +#define MIPI_SYST_CRC32_GET(v) + +#define MIPI_SYST_CRC32_U8(crc, v) +#define MIPI_SYST_CRC32_U16(crc, v) +#define MIPI_SYST_CRC32_U32(crc, v) +#define MIPI_SYST_CRC32_U64(crc, v) + +#else + +extern const mipi_syst_u32 mipi_syst_crc_table[256]; + +#define MIPI_SYST_CRC32_INIT(v) ((v) ^ 0xFFFFFFFF) +#define MIPI_SYST_CRC32_GET(v) ((v) ^ 0xFFFFFFFF) + +#define MIPI_SYST_CRC32_U8(crc, v) { crc = mipi_syst_crc32_8((crc), (v)); } +#define MIPI_SYST_CRC32_U16(crc, v) { crc = mipi_syst_crc32_16((crc), (v)); } +#define MIPI_SYST_CRC32_U32(crc, v) { crc = mipi_syst_crc32_32((crc), (v)); } +#define MIPI_SYST_CRC32_U64(crc, v) { crc = mipi_syst_crc32_64((crc), (v)); } + +#if !defined(MIPI_SYST_PCFG_ENABLE_INLINE) + +MIPI_SYST_INLINE mipi_syst_u32 mipi_syst_crc32_8(mipi_syst_u32 crc, mipi_syst_u8 b); +MIPI_SYST_INLINE mipi_syst_u32 mipi_syst_crc32_16(mipi_syst_u32 crc, mipi_syst_u16 hw); +MIPI_SYST_INLINE mipi_syst_u32 mipi_syst_crc32_32(mipi_syst_u32 crc, mipi_syst_u32 hw); +MIPI_SYST_INLINE mipi_syst_u32 mipi_syst_crc32_64(mipi_syst_u32 crc, mipi_syst_u64 hw); + +#else + +MIPI_SYST_INLINE mipi_syst_u32 mipi_syst_crc32_8(mipi_syst_u32 crc, mipi_syst_u8 b) +{ +#if (defined(MIPI_SYST_CRC_INTRINSIC)) + return _MIPI_SYST_CPU_CRC8(crc, b); +#else + return mipi_syst_crc_table[((int) crc ^ b) & 0xff] ^ (crc >> 8); +#endif +} + +MIPI_SYST_INLINE mipi_syst_u32 mipi_syst_crc32_16(mipi_syst_u32 crc, mipi_syst_u16 s) +{ +#if (defined(MIPI_SYST_CRC_INTRINSIC)) + return _MIPI_SYST_CPU_CRC16(crc, s); +#else + crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) s); + crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (s >> 8)); + return crc; +#endif +} + + +MIPI_SYST_INLINE mipi_syst_u32 mipi_syst_crc32_32(mipi_syst_u32 crc, mipi_syst_u32 w) +{ +#if (defined(MIPI_SYST_CRC_INTRINSIC)) + return _MIPI_SYST_CPU_CRC32(crc, w); +#else + + crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) w); + crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (w >> 8)); + crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (w >> 16)); + crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (w >> 24)); + return crc; +#endif +} + +MIPI_SYST_INLINE mipi_syst_u32 mipi_syst_crc32_64(mipi_syst_u32 crc, mipi_syst_u64 l) +{ +#if (defined(MIPI_SYST_CRC_INTRINSIC)) + return _MIPI_SYST_CPU_CRC64(crc, l); +#else + crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) l); + crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (l >> 8)); + crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (l >> 16)); + crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (l >> 24)); + crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (l >> 32)); + crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (l >> 40)); + crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (l >> 48)); + crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (l >> 56)); + return crc; +#endif +} +#endif +#endif /* defined(MIPI_SYST_PCFG_ENABLE_CHECKSUM) */ + +#ifdef __cplusplus +} /* extern C */ +#endif + +#endif |