Re: [squirrelfish] sin is slow on 64 bit

Would be interesting to see a performance comparison across a range of values. Geoff On Jun 7, 2012, at 11:34 AM, Zoltan Herczeg <zherczeg@inf.u-szeged.hu> wrote:

...

What kind of optimization did you have in mind?

A 3 line assembly code which mimic the old libc: fld [src] (must be a double) fsin fst [dst]

Not sure the best way of adding it to JSC.

And we should also check which is correct:

32 bit fsin: sin(6.2831853071795862) = -2.4492127076447545e-16

64 bit software based fsin: sin(6.2831853071795862) = -2.4492935982947064e-16

The difference is quite big.

Regards, Zoltan