On top of 2.6.9-rc3 + "reduce sha512_transform() stack usage" +
+ "add rotate left/right ops to bitops.h" patches.
Switches sha512 to asm-optimized 64bit rotation.
Reduces sha512 code size by ~300 insns, ~1K:
# size sha512.o.old sha512.o
text data bss dec hex filename
6642 364 0 7006 1b5e sha512.o.old
5587 364 0 5951 173f sha512.o
Run-tested with tcrypt module.
I also looked into optimizing cast[56] and sha256 by replacing
their 32bit rotation functions/macros, but it had no measurable effect
on i386. gcc seems to be on par with asm there.
--
vda