clean up a few other things while we're here. base/bitfield.hh: base/compression/null_compression.hh: dont #include <inttypes.hh> use "sim/host.hh" fix #include guard base/stats/types.hh: dont #include <inttypes.hh> use "sim/host.hh" kern/linux/aligned.hh: dont #include <stdint.hh> use "sim/host.hh" fix #include guard kern/linux/hwrpb.hh: fix #include guard --HG-- extra : convert_revision : 288c687a59a1e770bbb834879173e1a2ea371bce
69 lines
2.3 KiB
C++
69 lines
2.3 KiB
C++
/*
|
|
* Copyright (c) 2003 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__
|