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javascriptoverflowxor

Javascript xor 32bit integer issue

I've got issue trying to xor 32bits of 1 (0xffff ffff). Ex: 0xffffffff^0xfff should be 0xfffff000 but in js I can't declare unsigned int thus I get -4096 or -1000 in hex.

Here is js console output:

>0xffffffff^0xfff
<-4096

>(0xffffffff^0xfff).toString(16)
<"-1000"

>0xffffffff.toString(2)
<"11111111111111111111111111111111"

>0xfff.toString(2)
<"111111111111"

It formats correctly til I do something with it. Is there way to process such case correctly?

UPD: I realized that problem is in leading bit, but still don't how to deal with it

Solution

  • unsigned right shift is helpful for this case

    >((0xf0000000^0xf)>>>0).toString(16)
<"f000000f"