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2024-05-23 02:34:23 UTC Now

2020-07-28 20:08:48 UTC MAIN commitmail json YAML

src/sys/crypto/chacha/arch/arm/chacha_neon.c@1.7 / diff / nxr@1.7
src/sys/crypto/chacha/arch/arm/chacha_neon.h@1.3 / diff / nxr@1.3
src/sys/crypto/chacha/arch/arm/chacha_neon_32.S@1.1 / diff / nxr@1.1
src/sys/crypto/chacha/arch/arm/files.chacha_arm@1.3 / diff / nxr@1.3
src/tests/sys/crypto/chacha/Makefile@1.3 / diff / nxr@1.3

Implement 4-way vectorization of ChaCha for armv7 NEON.

cgd performance is not as good as I was hoping (~4% improvement over
chacha_ref.c) but it should improve substantially more if we let the
cgd worker thread keep fpu state so we don't have to pay the cost of
isb and zero-the-fpu on every 512-byte cgd block.

(riastradh)

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