The supplied functions SMACHR and DMACHR return values for various machine dependent constants, for single and double precision arithmetic, respectively. These machine constants are denoted R in single precision and D in double precision. We recapitulate them in the following table
Parameter | Brief description |
R1, D1 | the smallest positive number such that |
R2, D2 | the smallest positive number such that |
R3, D3 | the smallest nonzero positive number |
R4, D4 | the smallest full precision positive number; |
R5, D5 | the largest finite positive number |
Each of these numbers should be modified, either in the configuration files all.cf and/or <your_system>.cf, found under $MYCUTER/config.