Marek Safar wrote:
> Thanks to Paulo's recommendations here is the
> updated version of my original patch.
...
> + while (ptr != end_ptr) {
> + if (*ptr == value_32)
> + return (int)(ptr - start);
> + if (ptr[1] == value_32)
> + return (int)(ptr - start + 1);
> + if (ptr[2] == value_32)
> + return (int)(ptr - start + 2);
> + if (ptr[3] == value_32)
> + return (int)(ptr - start + 3);
> + if (ptr[4] == value_32)
> + return (int)(ptr - start + 4);
> + if (ptr[5] == value_32)
> + return (int)(ptr - start + 5);
> + if (ptr[6] == value_32)
> + return (int)(ptr - start + 6);
> + if (ptr[7] == value_32)
> + return (int)(ptr - start + 7);
> +
> + ptr += 8;
> + }
Can't we get mcs to optimize loops like this rather than putting it in
code? (Am I right in understanding this as eliminating 7/8ths of the
addition operations?)
--
- Josh Tauberer
http://razor.occams.info
"Yields falsehood when preceded by its quotation! Yields
falsehood when preceded by its quotation!" Achilles to
Tortoise (in "Gödel, Escher, Bach" by Douglas Hofstadter)
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