Does anyone know the precision of Real_Matrix in ada, using the below package?
with Ada.Numerics.Real_Arrays
And is there anyway of increasing it?
Does anyone know the precision of Real_Matrix in ada, using the below package? with
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Does anyone know the precision of Real_Matrix in ada, using the below package?
with Ada.Numerics.Real_Arrays
And is there anyway of increasing it?
According to the LRM, “The library package Numerics.Real_Arrays is declared pure and defines the same types and subprograms as Numerics.Generic_Real_Arrays, except that the predefined type Float is systematically substituted for Real’Base throughout.”
This means that the precision of Real_Matrix values will be that of the predefined Float type, which can be ascertained for your platform as the value of Float’Digits.
(Interestingly, the wording suggests a textual substitution of ‘Float’ for all ‘Real’ and Real’Base subprogram arguments, however, GNAT GPL 2012’s version of Real_Arrays simply instantiates the Generic_Real_Arrays package with Float.)
Increasing the precision can be done by either utilizing one of the higher precision instantiations: Long_Real_Arrays or Long_Long_Real_Arrays, or by defining your own floating point type with the desired precision and instantiating Generic_Real_Arrays with it.