CVS commit: src/sys/crypto/aes/arch/arm

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

Module Name:    src
Committed By:   riastradh
Date:           Mon Jun 29 23:57:56 UTC 2020

Modified Files:
        src/sys/crypto/aes/arch/arm: aes_neon.c files.aesneon
Added Files:
        src/sys/crypto/aes/arch/arm: aes_neon_32.S

Log Message:
Provide hand-written AES NEON assembly for arm32.

gcc does a lousy job at compiling 128-bit NEON intrinsics on arm32;
hand-writing it made it about 12x faster, by avoiding a zillion loads
and stores to spill everything and the kitchen sink onto the stack.
(But gcc does fine on aarch64, presumably because it has twice as
many registers and doesn't have to deal with q2=d4/d5 overlapping.)


To generate a diff of this commit:
cvs rdiff -u -r1.1 -r1.2 src/sys/crypto/aes/arch/arm/aes_neon.c \
    src/sys/crypto/aes/arch/arm/files.aesneon
cvs rdiff -u -r0 -r1.1 src/sys/crypto/aes/arch/arm/aes_neon_32.S

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