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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Automatically Tuned Linear Algebra Software ： ウィキペディア英語版 Automatically Tuned Linear Algebra Software Automatically Tuned Linear Algebra Software (ATLAS) is a software library for linear algebra. It provides a mature open source implementation of BLAS APIs for C and Fortran77. ATLAS is often recommended as a way to automatically generate an optimized BLAS library. While its performance often trails that of specialized libraries written for one specific hardware platform, it is often the first or even only optimized BLAS implementation available on new systems and is a large improvement over the generic BLAS available at Netlib. For this reason, ATLAS is sometimes used as a performance baseline for comparison with other products. ATLAS runs on most Unix-like operating systems and on Microsoft Windows (using Cygwin). It is released under a BSD-style license without advertising clause, and many well-known mathematics applications including MATLAB, Mathematica, Scilab, Sage, and some builds of GNU Octave may use it. ==Functionality== ATLAS provides a full implementation of the BLAS APIs as well as some additional functions from LAPACK, a higher-level library built on top of BLAS. In BLAS, functionality is divided into three groups called levels 1, 2 and 3. * Level 1 contains ''vector operations'' of the form ::$\backslash mathbf\; \backslash leftarrow\; \backslash alpha\; \backslash mathbf\; +\; \backslash mathbf\; \backslash !$ :as well as scalar dot products and vector norms, among other things. * Level 2 contains ''matrix-vector operations'' of the form ::$\backslash mathbf\; \backslash leftarrow\; \backslash alpha\; A\; \backslash mathbf\; +\; \backslash beta\; \backslash mathbf\; \backslash !$ :as well as solving $T\; \backslash mathbf\; =\; \backslash mathbf$ for $\backslash mathbf$ with $T$ being triangular, among other things. * Level 3 contains ''matrix-matrix operations'' such as the widely used General Matrix Multiply (GEMM) operation ::$C\; \backslash leftarrow\; \backslash alpha\; A\; B\; +\; \backslash beta\; C\; \backslash !$ :as well as solving $B\; \backslash leftarrow\; \backslash alpha\; T^\; B$ for triangular matrices $T$, among other things. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Automatically Tuned Linear Algebra Software」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.