mds at hypercatalog.com
Sat Feb 12 12:58:30 EST 2000
On 2/12/2000 9:07 AM, Stefan Stenzel (Stefan at Stenzel.com) shared his
> l-=0x3F800000l; /* un-bias */
> l<<=2; /* **4 */
> l+=0x3F800000l; /* bias */
Well this loses the sign after multiplying the exponent by 4 and moving
the 2nd and 3rd
bits of the mantissa into the exponent... so 256 (2^8) turns into ~4
I'm sure Stefan meant l += 0x01000000; (which is quite inaccurate but not
inaccurate :-) It's also considerably slower than just the 2 fp
on any platform with a FPU.
Now if you wanted a wild guess for x^1/4, that's another matter...
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