Data Types and Precision

Omega supports all standard data types and uses some specific defined types to guarantee a specific level of precision. There is only one user-configurable option for precision. When a specific floating point precision is not required, we use a Real data type that is, by default, double precision (8 bytes/64-bit) but if the code is built with a -DOMEGA_SINGLE_PRECISION (see insert link to build system) preprocessor flag, the default Real becomes single precision (4-byte/32-bit). Users are encouraged to use the default double precision unless exploring the performance or accuracy characteristics of single precision.