OpenEuphoria

Re: bitwise operations limited to 32 bits

• Posted by petelomax May 03, 2010
• 1404 views

Because code such as

function setBit(atom mask, integer bit) 
    return or_bits(mask,power(2,bit-1)) 
end function 
 
atom mask 
    mask = setBit(0,35) 

will now fail silently, leaving mask 0.

Of course the literal 35 makes this a bit blatent, but what if it is an enum, so your code works fine until you insert a few more flags?

As I said, there is a strong case for and_bits(<anything>,#FFFFFFFF) to return the perfectly valid answer, but are there any real-world or_bits etc examples that I am missing whereby it should quietly and incorrectly set the top bits of the input to 0s?

Regards, Pete