[Zlib-devel] [8/6][RFC V2.1 Patch] ia64 implementation

[Jan Seiffert]

Thanks to Mike Frysinger i could torture some real IA64 HW (and myself too...).

Throw away the first post of this patch, it's broken, in several ways.
(Note to self: Don't try to be a cool kid and save on parenthesis)
And even if fixed, it's half as slow as the generic code.
Counting instructions is a bad move on IA64.

So here it is, new and improved, with 400% more unrolling:

an IA64 (McKinley)
         -------- orig ------
                a: 0x0CB4B676, 10000 * 160000 bytes     t: 1912 ms
                a: 0x25BEB273, 10000 * 159999 bytes     t: 1916 ms
                a: 0x733CB174, 10000 * 159998 bytes     t: 1912 ms
                a: 0x1144AF76, 10000 * 159996 bytes     t: 1916 ms
                a: 0x3F4ECB8A, 10000 * 159992 bytes     t: 1916 ms
                a: 0x1902A382, 10000 * 159984 bytes     t: 1912 ms
         -------- vec ------
                a: 0x0CB4B676, 10000 * 160000 bytes     t: 760 ms
                a: 0x25BEB273, 10000 * 159999 bytes     t: 764 ms
                a: 0x733CB174, 10000 * 159998 bytes     t: 760 ms
                a: 0x1144AF76, 10000 * 159996 bytes     t: 760 ms
                a: 0x3F4ECB8A, 10000 * 159992 bytes     t: 808 ms
                a: 0x1902A382, 10000 * 159984 bytes     t: 760 ms
         speedup: 2.515789

next stop, blackfin, then working on the ARM iWMMXt version for XScale
(N.B.: does someone have a link handy to the instruction reference?),
and when some time has passed a complete repost, there are little
changes here and there.
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