arm64/xor: use EOR3 instructions when available

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Use the EOR3 instruction to implement xor_blocks() if the instruction is
available, which is the case if the CPU implements the SHA-3 extension.
This is about 20% faster on Apple M1 when using the 5-way version.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20211213140252.2856053-1-ardb@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Ard Biesheuvel 2021-12-13 15:02:52 +01:00 • committed by Catalin Marinas

parent d58071a8a7

commit 2c54b423cf

3 changed files with 157 additions and 1 deletions

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6

arch/arm64/Kconfig

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5

arch/arm64/Makefile

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147

arch/arm64/lib/xor-neon.c

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