Welcome to the CADNA Website


The tools, examples, documentations and references you will find in this site deal with the round-off error propagation which appears at each time one performes numerical computations using the finite precision floating point arithmetic on computers.

The main tool is the CADNA library which allows to estimate the round-off error propagation on every scientific code written in FORTRAN language. To discover CADNA, click here.

The IEEE 754 norm defines four different rounding modes for the floating point arithmetic. Generally, they are avalaible on computers but there is no simple way to use it. Very short assembler codes are presented which allows to change dynamically the rounding mode in every scientific codes under Unix systems. To get more information, click here.

For a better understanding of the CADNA use, some concret examples are presented. To see them, click here.

To go directly to the CADNA product, click here.

To contact a member of the CADNA team, click here .

More information can be requested to the CADNA team