Re: x86 SHA1: Faster than OpenSSL

[Jonathan del Strother <maillist@steelskies.com>]

On Mon, Aug 3, 2009 at 4:47 AM, George Spelvin<linux@horizon.com> wrote:
> (Work in progress, state dump to mailing list archives.)
>
> This started when discussing git startup overhead due to the dynamic
> linker.  One big contributor is the openssl library, which is used only
> for its optimized x86 SHA-1 implementation.  So I took a look at it,
> with an eye to importing the code directly into the git source tree,
> and decided that I felt like trying to do better.
>

FWIW, this doesn't work on OS X / Darwin.  'as' doesn't take a --32
flag, it takes an -arch i386 flag.  After changing that, I get:

as -arch i386  -o sha1-586.o sha1-586.s
sha1-586.s:4:Unknown pseudo-op: .type
sha1-586.s:4:Rest of line ignored. 1st junk character valued 115 (s).
sha1-586.s:5:Alignment too large: 15. assumed.
sha1-586.s:19:Alignment too large: 15. assumed.
sha1-586.s:1438:Unknown pseudo-op: .size
sha1-586.s:1438:Rest of line ignored. 1st junk character valued 115 (s).
make: *** [sha1-586.o] Error 1

- at which point I have no idea how to fix it.