This is what I have so far for my input/output routines:

<Reveal this spoiler or all in this thread>

The names don't make much sense at the moment but

  1. dd2Dec() is intended to convert a doubledouble to decimal.

    Not Working yet.

    I produced the set of constant in __DATA__ using M::BF with div_scale set 100.

  2. FP2bin() just dumps the contents of a double as binary fields.
  3. i2dd() takes string and uses M::BF to split it to a pair of doubles.

    Seems to work (for pi); but I'm conscious of your statements above.

  4. d2Hex() double to hex notation.

And this is the output from the above and the decimal calculation that appears to show it works:

C:\test>ddt
0 10000000000 1001001000011111101101010100010001000010110100011000    
+        3.14159265358979310e+000
0 01111001010 0011111101000101111010110001010001101011101000110001    
+        1.38462643383279500e-016
0x1.921fb54442d18p1
0x1.3f45eb146ba31p-53 

3.1415926535897931000000000000000
0.0000000000000001384626433832795
3.1415926535897932384626433832795 Calculated
3.1415926535897932384626433832795 Input

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In reply to Re^11: Math::BigFloat to native double? by BrowserUk
in thread Math::BigFloat to native double? by BrowserUk

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