CVS commit: src

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Tue Jul 28 20:08:48 UTC 2020

Modified Files:
        src/sys/crypto/chacha/arch/arm: chacha_neon.c chacha_neon.h
            files.chacha_arm
        src/tests/sys/crypto/chacha: Makefile
Added Files:
        src/sys/crypto/chacha/arch/arm: chacha_neon_32.S

Log Message:
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.


To generate a diff of this commit:
cvs rdiff -u -r1.6 -r1.7 src/sys/crypto/chacha/arch/arm/chacha_neon.c
cvs rdiff -u -r1.2 -r1.3 src/sys/crypto/chacha/arch/arm/chacha_neon.h \
    src/sys/crypto/chacha/arch/arm/files.chacha_arm
cvs rdiff -u -r0 -r1.1 src/sys/crypto/chacha/arch/arm/chacha_neon_32.S
cvs rdiff -u -r1.2 -r1.3 src/tests/sys/crypto/chacha/Makefile

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.