G.2 Numeric Performance Requirements
shall provide a user-selectable mode in which the accuracy and other
numeric performance requirements detailed in the following subclauses
are observed. This mode, referred to as the strict mode
, may or
may not be the default mode; it directly affects the results of the predefined
arithmetic operations of real types and the results of the subprograms
in children of the Numerics package, and indirectly affects the operations
in other language defined packages.
shall also provide the opposing mode, which is known as the relaxed
Either mode may be the default mode.
The two modes need not actually be different.