The pitfalls of verifying floating-point computations

International audienceCurrent critical systems commonly use a lot of floating-point computations, and thus the testing or static analysis of programs containing floating-point operators has become a priority. However, correctly defining the semantics of common implementations of floating-point is tricky, because semantics may change with many factors beyond source-code level, such as choices made by compilers. We here give concrete examples of problems that can appear and solutions to implement in analysis software