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Diffstat (limited to 'base/bitfield.hh')
-rw-r--r-- | base/bitfield.hh | 69 |
1 files changed, 0 insertions, 69 deletions
diff --git a/base/bitfield.hh b/base/bitfield.hh deleted file mode 100644 index c59354c7d..000000000 --- a/base/bitfield.hh +++ /dev/null @@ -1,69 +0,0 @@ -/* - * Copyright (c) 2003-2005 The Regents of The University of Michigan - * 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 copyright holders 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. - */ - -#ifndef __BASE_BITFIELD_HH__ -#define __BASE_BITFIELD_HH__ - -#include "sim/host.hh" - -/** - * Generate a 64-bit mask of 'nbits' 1s, right justified. - */ -inline uint64_t -mask(int nbits) -{ - return (nbits == 64) ? (uint64_t)-1LL : (1ULL << nbits) - 1; -} - - -/** - * Extract the bitfield from position 'first' to 'last' (inclusive) - * from 'val' and right justify it. MSB is numbered 63, LSB is 0. - */ -template <class T> -inline -T -bits(T val, int first, int last) -{ - int nbits = first - last + 1; - return (val >> last) & mask(nbits); -} - -/** - * Sign-extend an N-bit value to 64 bits. - */ -template <int N> -inline -int64_t -sext(uint64_t val) -{ - int sign_bit = bits(val, N-1, N-1); - return sign_bit ? (val | ~mask(N)) : val; -} - -#endif // __BASE_BITFIELD_HH__ |