VAX-float

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VAX Floating Point
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   Conversion of flonums to floating point is correct, and compatible
with previous assemblers.  Rounding is towards zero if the remainder is
exactly half the least significant bit.

   `D', `F', `G' and `H' floating point formats are understood.

   Immediate floating literals (*e.g.* `S`$6.9') are rendered
correctly.  Again, rounding is towards zero in the boundary case.

   The `.float' directive produces `f' format numbers.  The `.double'
directive produces `d' format numbers.