in reply to 32bit float from two halves

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my $var3 = unpack 'f', pack 'V', $var1 << 16 | $var2;

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and you get your float in $var3.

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Re^2: 32bit float from two halves
by thatmguy (Initiate) on Aug 10, 2016 at 22:42 UTC
    Makes sense - reverse and pack two shorts, then unpack as float vs build a long, reverse/pack it as a long, then unpack as float. Thanks for both solutions, it's pretty cool to see the proverbial cat skinned multiple ways...
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      Just to make sure the right idea gets across — the reverse as seen here merely changes argument order and is otherwise irrelevant. (It's quicker to type in "reverse" than to swap those numbers in a command line.)

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        Aha, ok. Is there then an endianness change implied in the arguments to pack? The two parts of the value are coming from some sort of industrial control unit; we don't have any info on what the internal architecture of the unit is so we're trying to document exactly what needed to be done to the data to get it readable via perl on linux/Intel. Thanks again for the insight, this is really helping...
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[d/l]

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