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author | dos-reis <gdr@axiomatics.org> | 2007-08-14 05:14:52 +0000 |
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committer | dos-reis <gdr@axiomatics.org> | 2007-08-14 05:14:52 +0000 |
commit | ab8cc85adde879fb963c94d15675783f2cf4b183 (patch) | |
tree | c202482327f474583b750b2c45dedfc4e4312b1d /src/interp/bits.lisp.pamphlet | |
download | open-axiom-ab8cc85adde879fb963c94d15675783f2cf4b183.tar.gz |
Initial population.
Diffstat (limited to 'src/interp/bits.lisp.pamphlet')
-rw-r--r-- | src/interp/bits.lisp.pamphlet | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/interp/bits.lisp.pamphlet b/src/interp/bits.lisp.pamphlet new file mode 100644 index 00000000..1b38eadf --- /dev/null +++ b/src/interp/bits.lisp.pamphlet @@ -0,0 +1,99 @@ +%% Oh Emacs, this is a -*- Lisp -*- file despite apperance. +\documentclass{article} +\usepackage{axiom} + +\title{\File{src/interp/bits.lisp} Pamphlet} +\author{Timothy Daly} + +\begin{document} + +\maketitle +\begin{abstract} +\end{abstract} + +\tableofcontents +\eject + +\section{License} + +<<license>>= +;; Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd. +;; All rights reserved. +;; +;; Redistribution and use in source and binary forms, with or without +;; modification, are permitted provided that the following conditions are +;; met: +;; +;; - Redistributions of source code must retain the above copyright +;; notice, this list of conditions and the following disclaimer. +;; +;; - Redistributions in binary form must reproduce the above copyright +;; notice, this list of conditions and the following disclaimer in +;; the documentation and/or other materials provided with the +;; distribution. +;; +;; - Neither the name of The Numerical ALgorithms Group Ltd. nor the +;; names of its contributors may be used to endorse or promote products +;; derived from this software without specific prior written permission. +;; +;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS +;; IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED +;; TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A +;; PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER +;; OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, +;; EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, +;; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR +;; PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +;; LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +@ +<<*>>= +<<license>> + +;;; The types "bit" and "bit vector" are implemented differently +;;; in different variants of lisp. +;;; These lisp macros/functions will have different implementations +;;; on different lisp systems. + +;;; The operations which traverse entire vectors are given as functions +;;; since the function calling overhead will be relatively small. +;;; The operations which extract or set a single part of the vector are +;;; provided as macros. + +(in-package "BOOT") + +;;; SMW Nov 88: Created + +(defmacro truth-to-bit (x) `(cond (,x 1) ('else 0))) +(defmacro bit-to-truth (b) `(eq ,b 1)) + +(defun bvec-make-full (n x) + (make-array (list n) :element-type 'bit :initial-element x)) + +(defmacro bvec-elt (bv i) `(sbit ,bv ,i)) +(defmacro bvec-setelt (bv i x) `(setf (sbit ,bv ,i) ,x)) +(defmacro bvec-size (bv) `(size ,bv)) + +(defun bvec-copy (bv) (copy-seq bv)) +(defun bvec-concat (bv1 bv2) (concatenate '(vector bit) bv1 bv2)) +(defun bvec-equal (bv1 bv2) (equal bv1 bv2)) +(defun bvec-greater (bv1 bv2) + (let ((pos (mismatch bv1 bv2))) + (cond ((or (null pos) (>= pos (length bv1))) nil) + ((< pos (length bv2)) (> (bit bv1 pos) (bit bv2 pos))) + ((find 1 bv1 :start pos) t) + (t nil)))) +(defun bvec-and (bv1 bv2) (bit-and bv1 bv2)) +(defun bvec-or (bv1 bv2) (bit-ior bv1 bv2)) +(defun bvec-xor (bv1 bv2) (bit-xor bv1 bv2)) +(defun bvec-nand (bv1 bv2) (bit-nand bv1 bv2)) +(defun bvec-nor (bv1 bv2) (bit-nor bv1 bv2)) +(defun bvec-not (bv) (bit-not bv)) +@ +\eject +\begin{thebibliography}{99} +\bibitem{1} nothing +\end{thebibliography} +\end{document} |