G.2 Numeric Performance Requirements

1. Implementations 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. Implementations shall also provide the opposing mode, which is known as the relaxed mode.
   Implementation Permissions
   
2. Either mode may be the default mode.
3. The two modes need not actually be different.

• G.2.1: Model of Floating Point Arithmetic
• G.2.2: Model-Oriented Attributes of Floating Point Types
• G.2.3: Model of Fixed Point Arithmetic
• G.2.4: Accuracy Requirements for the Elementary Functions
• G.2.5: Performance Requirements for Random Number Generation
• G.2.6: Accuracy Requirements for Complex Arithmetic

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