The Racket repository
f42cc6f14a
The fix consists of three parts: 1. Rewriting `inline-matrix*'. The material change here is that the expansion now contains only direct applications of `+' and `*'. TR's optimizer replaces them with `unsafe-fx+' and `unsafe-fx*', which keeps intermediate flonum values from being boxed. 2. Making the types of all functions that operate on (Matrix Number) values more precise. Now TR can prove that matrix operations preserve inexactness. For example, matrix-conjugate : (Matrix Flonum) -> (Matrix Flonum) and three other cases for Real, Float-Complex, and Number. 3. Changing the return types of some functions that used to return things like (Matrix (U A 0)). Now that we worry about preserving inexactness, we can't have `matrix-upper-triangle' always return a matrix that contains exact zeros. It now accepts an optional `zero' argument of type A. |
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The Racket Programming Language =============================== Instructions for building Racket from source are in src/README. The main executables in this package: * DrRacket: Racket's integrated development environment (start here!). * racket: command-line tool for running Racket programs. * raco: command-line tool for compilation, documentation, and more. More Information ---------------- For Racket documentation, use DrRacket's `Help' menu, run the `Racket Documentation' application (Windows or Mac OS X), or run `raco docs' from a command line. Visit us at http://racket-lang.org/ for more Racket resources. License ------- Racket Copyright (c) 2010-2013 PLT Scheme Inc. Racket is distributed under the GNU Lesser General Public License (LGPL). This means that you can link Racket into proprietary applications, provided you follow the rules stated in the LGPL. You can also modify Racket; if you distribute a modified version, you must distribute it under the terms of the LGPL, which in particular means that you must release the source code for the modified software. See doc/release-notes/COPYING.txt for more information.