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# cea2e2f860c5 oxygen / vendor / crc-fast / src / crc32 / fusion / mod.rs
1011 B · Rust · last changed Strata: the cloud stores send through ureq, so every release target links 1 month ago source blame history raw
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// Copyright 2025 Don MacAskill. Licensed under MIT or Apache-2.0.
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//! This module provides support for calculating CRC-32/ISO-HDLC and CRC-32/ISCSI using
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//! fusion techniques.
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//!
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//! https://www.corsix.org/content/fast-crc32c-4k
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//! https://www.corsix.org/content/alternative-exposition-crc32_4k_pclmulqdq
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//! https://dougallj.wordpress.com/2022/05/22/faster-crc32-on-the-apple-m1/
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//! https://github.com/corsix/fast-crc32/
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mod aarch64;
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mod x86;
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/// Only AArch64 has native CRC-32/ISO-HDLC instructions
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#[inline(always)]
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#[cfg(target_arch = "aarch64")]
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pub(crate) fn crc32_iso_hdlc(state: u32, data: &[u8]) -> u32 {
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    aarch64::crc32_iso_hdlc(state, data)
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}
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/// Both AArch64 and x86 have native CRC-32/ISCSI instructions
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#[inline(always)]
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pub(crate) fn crc32_iscsi(state: u32, data: &[u8]) -> u32 {
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    #[cfg(target_arch = "aarch64")]
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    {
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        aarch64::crc32_iscsi(state, data)
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    }
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    #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
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    {
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        x86::crc32_iscsi(state, data)
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    }
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}