eiji7:
for people not in topic could you also please describe (or link to some article) why <<-0.0/float>> is represented as <<128,0,0,0,0,0,0,0>>?
Here is a link to Wikipedia’s description:
Double-precision floating-point format (sometimes called FP64 or float64) is a floating-point number format, usually occupying 64 bits in computer memory; it represents a wide range of numeric values by using a floating radix point.
Double precision may be chosen when the range or precision of single precision would be insufficient.
In the IEEE 754 standard, the 64-bit base-2 format is officially referred to as binary64; it was called double in IEEE 754-1985. IEEE 754 specifies additional floa...
Yes, the most significant bit is the sign bit. Your example have the wrong sizes for the segments, but it does seem that you have correctly understood both the current behavior and the new behavior. Here is a corrected Erlang version of your same?/2 function:
is_same(<<_:1, 0:63>>, <<_:1, 0:63>>) -> true;
is_same(Same, Same) -> true;
is_same(_, _) -> false.
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