Annex G
(normative)
Numerics
The Numerics Annex specifies
features for complex arithmetic, including complex
I/O;
a mode (“strict mode”), in which the
predefined arithmetic operations of floating point and fixed point types
and the functions and operations of various predefined packages have
to provide guaranteed accuracy or conform to other numeric performance
requirements, which the Numerics Annex also specifies;
a mode (“relaxed mode”), in which no
accuracy or other numeric performance requirements need be satisfied,
as for implementations not conforming to the Numerics Annex;
models of floating point and fixed point arithmetic
on which the accuracy requirements of strict mode are based;
the definitions of the model-oriented attributes
of floating point types that apply in the strict mode; and
features for the manipulation of real and complex
vectors and matrices.
Implementation Advice
If Fortran (respectively, C) is widely supported
in the target environment, implementations supporting the Numerics Annex
should provide the child package Interfaces.Fortran (respectively, Interfaces.C)
specified in
Annex B and should support a
convention_identifier
of Fortran (respectively, C) in the interfacing pragmas (see
Annex
B), thus allowing Ada programs to interface with programs written
in that language.
Sponsored by Ada-Europe