/************************************************************************************* Grid physics library, www.github.com/paboyle/Grid Source file: ./lib/Bitwise.h Copyright (C) 2016 Author: Guido Cossu This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. See the full license in the file "LICENSE" in the top level distribution directory *************************************************************************************/ /* END LEGAL */ #ifndef GRID_BITWISE_H #define GRID_BITWISE_H #include #include #include #include #include #ifdef GRID_DEFAULT_PRECISION_SINGLE #define GRID_REAL_BYTES 4 #endif #ifdef GRID_DEFAULT_PRECISION_DOUBLE #define GRID_REAL_BYTES 8 #endif namespace Grid { void show_binaryrep(const unsigned char* a, size_t size); template void show_binaryrep(const T& a) { const char* beg = reinterpret_cast(&a); const char* end = beg + sizeof(a); unsigned int ctr = 0; while (beg != end) { std::cout << std::bitset(*beg++) << ' '; ctr++; if (ctr % GRID_REAL_BYTES == 0) std::cout << '\n'; } std::cout << '\n'; } template void bitwise_xor(T& l, T& r, unsigned char* xors) { assert(sizeof(l) == sizeof(r)); unsigned char* org = reinterpret_cast(&l); unsigned char* cur = reinterpret_cast(&r); int words = sizeof(l) / sizeof(*org); unsigned char result = 0; for (int w = 0; w < words; w++) xors[w] = (org[w] ^ cur[w]); } }; // namespace #endif