919 research outputs found
GRAAL - A graph algorithmic language
FORTRAN-based version, FGRAAL, of graph algorithmic language GRAA
Fifty years of Hoare's Logic
We present a history of Hoare's logic.Comment: 79 pages. To appear in Formal Aspects of Computin
AD in Fortran, Part 2: Implementation via Prepreprocessor
We describe an implementation of the Farfel Fortran AD extensions. These
extensions integrate forward and reverse AD directly into the programming
model, with attendant benefits to flexibility, modularity, and ease of use. The
implementation we describe is a "prepreprocessor" that generates input to
existing Fortran-based AD tools. In essence, blocks of code which are targeted
for AD by Farfel constructs are put into subprograms which capture their
lexical variable context, and these are closure-converted into top-level
subprograms and specialized to eliminate EXTERNAL arguments, rendering them
amenable to existing AD preprocessors, which are then invoked, possibly
repeatedly if the AD is nested
- …