0cdcb08d90
arch/alpha/alpha_tru64_process.cc:
base/intmath.hh:
base/statistics.cc:
base/str.cc:
cpu/o3/btb.cc:
sim/process.cc:
sim/syscall_emul.hh:
Rename intmath.hh functions to follow m5 style
(RoundUp -> roundUp, etc.).
base/intmath.cc:
Rename intmath.hh functions to follow m5 style
(RoundUp -> roundUp, etc.).
Also reindent code in m5 style.
--HG--
extra : convert_revision : 57b853002bc3c9911e122599d9062b41a06d8e6a
118 lines
3.5 KiB
C++
118 lines
3.5 KiB
C++
/*
|
|
* Copyright (c) 2004-2005 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.
|
|
*/
|
|
|
|
#include "base/intmath.hh"
|
|
#include "base/trace.hh"
|
|
#include "cpu/o3/btb.hh"
|
|
|
|
DefaultBTB::DefaultBTB(unsigned _numEntries,
|
|
unsigned _tagBits,
|
|
unsigned _instShiftAmt)
|
|
: numEntries(_numEntries),
|
|
tagBits(_tagBits),
|
|
instShiftAmt(_instShiftAmt)
|
|
{
|
|
// @todo Check to make sure num_entries is valid (a power of 2)
|
|
|
|
DPRINTF(Fetch, "BTB: Creating BTB object.\n");
|
|
|
|
btb = new BTBEntry[numEntries];
|
|
|
|
for (int i = 0; i < numEntries; ++i)
|
|
{
|
|
btb[i].valid = false;
|
|
}
|
|
|
|
idxMask = numEntries - 1;
|
|
|
|
tagMask = (1 << tagBits) - 1;
|
|
|
|
tagShiftAmt = instShiftAmt + floorLog2(numEntries);
|
|
}
|
|
|
|
inline
|
|
unsigned
|
|
DefaultBTB::getIndex(const Addr &inst_PC)
|
|
{
|
|
// Need to shift PC over by the word offset.
|
|
return (inst_PC >> instShiftAmt) & idxMask;
|
|
}
|
|
|
|
inline
|
|
Addr
|
|
DefaultBTB::getTag(const Addr &inst_PC)
|
|
{
|
|
return (inst_PC >> tagShiftAmt) & tagMask;
|
|
}
|
|
|
|
bool
|
|
DefaultBTB::valid(const Addr &inst_PC)
|
|
{
|
|
unsigned btb_idx = getIndex(inst_PC);
|
|
|
|
Addr inst_tag = getTag(inst_PC);
|
|
|
|
assert(btb_idx < numEntries);
|
|
|
|
if (btb[btb_idx].valid && inst_tag == btb[btb_idx].tag) {
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// @todo Create some sort of return struct that has both whether or not the
|
|
// address is valid, and also the address. For now will just use addr = 0 to
|
|
// represent invalid entry.
|
|
Addr
|
|
DefaultBTB::lookup(const Addr &inst_PC)
|
|
{
|
|
unsigned btb_idx = getIndex(inst_PC);
|
|
|
|
Addr inst_tag = getTag(inst_PC);
|
|
|
|
assert(btb_idx < numEntries);
|
|
|
|
if (btb[btb_idx].valid && inst_tag == btb[btb_idx].tag) {
|
|
return btb[btb_idx].target;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
void
|
|
DefaultBTB::update(const Addr &inst_PC, const Addr &target)
|
|
{
|
|
unsigned btb_idx = getIndex(inst_PC);
|
|
|
|
assert(btb_idx < numEntries);
|
|
|
|
btb[btb_idx].valid = true;
|
|
btb[btb_idx].target = target;
|
|
btb[btb_idx].tag = getTag(inst_PC);
|
|
}
|