Re^3: Unpacking extended-double precision floats

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Re^4: Unpacking extended-double precision floats by Anonymous Monk on Nov 29, 2006 at 20:31 UTC
If loss of precision is of no concern, and the number of bits of exponent and sign is the same between d and D formats, you may be able to use unpack d plus two skip bytes, and pack it as a double d followed by two appropriate fill bytes (00 or 88 ?). Bill N1VUX	[reply]
Re^5: Unpacking extended-double precision floats by herveus (Prior) on Nov 30, 2006 at 12:35 UTC
Howdy! If I recall correctly (and I'll be checking the references before I do anything), "double precision" and "extended double precision" have different numbers of bits in the exponent. It's not quite that simple to smush the precision down. I think I go from 64 bits of mantissa to 53 bits of mantissa (but don't hold me to precise numbers here). In the end, I should be able to pick the three components apart and Just Do The Math. yours, Michael	[reply]
Re^6: Unpacking extended-double precision floats by Fengor (Pilgrim) on Nov 30, 2006 at 13:08 UTC
According to the wikipedia article on double precision floats it has 1 sign bit 11 exponent bits and 52 mantissa bits -- "WHAT CAN THE HARVEST HOPE FOR IF NOT THE CARE OF THE REAPER MAN" -- Terry Pratchett, "Reaper Man"	[reply]
Re^7: Unpacking extended-double precision floats by BrowserUk (Patriarch) on Nov 30, 2006 at 13:28 UTC
Re^7: Unpacking extended-double precision floats by herveus (Prior) on Nov 30, 2006 at 13:29 UTC
Re^4: Unpacking extended-double precision floats by herveus (Prior) on Nov 29, 2006 at 18:48 UTC
Howdy! Yep. I tried that. The Perl on my mac (where I'm actually doing this) told me to pound sand. I'll try Convert::Binary::C when I get home. ...so, yes, I want an NV on the Perl side of things. yours, Michael	[reply]