00001 /*!@file Util/fpu.H manipulate floating-point unit (FPU) settings */ 00002 00003 // //////////////////////////////////////////////////////////////////// // 00004 // The iLab Neuromorphic Vision C++ Toolkit - Copyright (C) 2000-2005 // 00005 // by the University of Southern California (USC) and the iLab at USC. // 00006 // See http://iLab.usc.edu for information about this project. // 00007 // //////////////////////////////////////////////////////////////////// // 00008 // Major portions of the iLab Neuromorphic Vision Toolkit are protected // 00009 // under the U.S. patent ``Computation of Intrinsic Perceptual Saliency // 00010 // in Visual Environments, and Applications'' by Christof Koch and // 00011 // Laurent Itti, California Institute of Technology, 2001 (patent // 00012 // pending; application number 09/912,225 filed July 23, 2001; see // 00013 // http://pair.uspto.gov/cgi-bin/final/home.pl for current status). // 00014 // //////////////////////////////////////////////////////////////////// // 00015 // This file is part of the iLab Neuromorphic Vision C++ Toolkit. // 00016 // // 00017 // The iLab Neuromorphic Vision C++ Toolkit is free software; you can // 00018 // redistribute it and/or modify it under the terms of the GNU General // 00019 // Public License as published by the Free Software Foundation; either // 00020 // version 2 of the License, or (at your option) any later version. // 00021 // // 00022 // The iLab Neuromorphic Vision C++ Toolkit is distributed in the hope // 00023 // that it will be useful, but WITHOUT ANY WARRANTY; without even the // 00024 // implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR // 00025 // PURPOSE. See the GNU General Public License for more details. // 00026 // // 00027 // You should have received a copy of the GNU General Public License // 00028 // along with the iLab Neuromorphic Vision C++ Toolkit; if not, write // 00029 // to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, // 00030 // Boston, MA 02111-1307 USA. // 00031 // //////////////////////////////////////////////////////////////////// // 00032 // 00033 // Primary maintainer for this file: Rob Peters <rjpeters at usc dot edu> 00034 // $HeadURL: svn://isvn.usc.edu/software/invt/trunk/saliency/src/Util/fpu.H $ 00035 // $Id: fpu.H 5755 2005-10-19 20:57:27Z rjpeters $ 00036 // 00037 00038 #ifndef UTIL_FPU_H_DEFINED 00039 #define UTIL_FPU_H_DEFINED 00040 00041 #include <string> 00042 00043 00044 00045 00046 // ###################################################################### 00047 // fpu precision 00048 00049 //! Represents different floating-point precision modes 00050 enum FpuPrecision 00051 { 00052 FPU_PREC_SINGLE, //!< fpu operates in single precision (32-bit, 24-bit significand) 00053 FPU_PREC_DOUBLE, //!< fpu operates in double precision (64-bit, 53-bit significand) 00054 FPU_PREC_EXTENDED //!< default: fpu operates in extended precision (80-bit, 64-bit significand) 00055 }; 00056 00057 //! Query the fpu's current precision 00058 FpuPrecision getFpuPrecision(); 00059 00060 //! Set the fpu's precision 00061 void setFpuPrecision(FpuPrecision prec); 00062 00063 //! FpuPrecision -> string 00064 std::string convertToString(const FpuPrecision& val); 00065 00066 //! string -> FpuPrecision 00067 void convertFromString(const std::string& str, FpuPrecision& val); 00068 00069 00070 00071 00072 // ###################################################################### 00073 // fpu rounding 00074 00075 //! Represents different floating-point rounding modes 00076 enum FpuRoundingMode 00077 { 00078 FPU_ROUND_NEAR, //!< fpu rounds to nearest value 00079 FPU_ROUND_DOWN, //!< fpu rounds toward -inf 00080 FPU_ROUND_UP, //!< fpu rounds toward +inf 00081 FPU_ROUND_ZERO //!< fpu rounds toward zero 00082 }; 00083 00084 //! Query the fpu's current rounding mode 00085 FpuRoundingMode getFpuRoundingMode(); 00086 00087 //! Set the fpu's rounding mode 00088 void setFpuRoundingMode(FpuRoundingMode mode); 00089 00090 //! FpuRoundingMode -> string 00091 std::string convertToString(const FpuRoundingMode& val); 00092 00093 //! string -> FpuRoundingMode 00094 void convertFromString(const std::string& str, FpuRoundingMode& val); 00095 00096 // ###################################################################### 00097 /* So things look consistent in everyone's emacs... */ 00098 /* Local Variables: */ 00099 /* indent-tabs-mode: nil */ 00100 /* End: */ 00101 00102 #endif // UTIL_FPU_H_DEFINED
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