Gabriele Cosmo
95 lines
3.0 KiB
C++
95 lines
3.0 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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#ifndef G4IEEE754_hh
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#define G4IEEE754_hh 1
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#include "G4Types.hh"
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#include <cstdint>
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namespace G4IEEE754
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{
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//----------------------------------------------------------------------------
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// Used to switch between different type of interpretations of the data
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// (64 bits)
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//
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union ieee754
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{
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ieee754() = default;
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ieee754(G4double thed) { d = thed; };
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ieee754(uint64_t thell) { ll = thell; };
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ieee754(G4float thef) { f[0] = thef; };
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ieee754(uint32_t thei) { i[0] = thei; };
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G4double d;
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G4float f[2];
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uint32_t i[2];
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uint64_t ll;
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uint16_t s[4];
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};
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//----------------------------------------------------------------------------
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// Converts a double to an unsigned long long
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//
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inline uint64_t dp2uint64(G4double x)
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{
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ieee754 tmp;
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tmp.d = x;
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return tmp.ll;
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}
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//----------------------------------------------------------------------------
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// Converts an unsigned long long to a double
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//
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inline G4double uint642dp(uint64_t ll)
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{
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ieee754 tmp;
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tmp.ll = ll;
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return tmp.d;
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}
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//----------------------------------------------------------------------------
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// Converts an int to a float
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//
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inline G4float uint322sp(G4int x)
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{
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ieee754 tmp;
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tmp.i[0] = x;
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return tmp.f[0];
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}
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//----------------------------------------------------------------------------
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// Converts a float to an int
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//
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inline uint32_t sp2uint32(G4float x)
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{
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ieee754 tmp;
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tmp.f[0] = x;
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return tmp.i[0];
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}
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} // namespace G4IEEE754
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#endif
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