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authorGabe Black <gblack@eecs.umich.edu>2012-05-26 13:44:46 -0700
committerGabe Black <gblack@eecs.umich.edu>2012-05-26 13:44:46 -0700
commit0cba96ba6a5d7a4dab2a63b14149c49dfbfbb3bc (patch)
tree1e4e1372b76ed021060d560c2ee1a474f4b22ef0 /src/arch/sparc/predecoder.hh
parenteae1e97fb002b44a9d8c46df2da1ddc1d0156ce4 (diff)
downloadgem5-0cba96ba6a5d7a4dab2a63b14149c49dfbfbb3bc.tar.xz
CPU: Merge the predecoder and decoder.
These classes are always used together, and merging them will give the ISAs more flexibility in how they cache things and manage the process. --HG-- rename : src/arch/x86/predecoder_tables.cc => src/arch/x86/decoder_tables.cc
Diffstat (limited to 'src/arch/sparc/predecoder.hh')
-rw-r--r--src/arch/sparc/predecoder.hh121
1 files changed, 0 insertions, 121 deletions
diff --git a/src/arch/sparc/predecoder.hh b/src/arch/sparc/predecoder.hh
deleted file mode 100644
index a7a543621..000000000
--- a/src/arch/sparc/predecoder.hh
+++ /dev/null
@@ -1,121 +0,0 @@
-/*
- * Copyright (c) 2006 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.
- *
- * Authors: Gabe Black
- */
-
-#ifndef __ARCH_SPARC_PREDECODER_HH__
-#define __ARCH_SPARC_PREDECODER_HH__
-
-#include "arch/sparc/registers.hh"
-#include "arch/sparc/types.hh"
-#include "base/bitfield.hh"
-#include "base/misc.hh"
-#include "base/types.hh"
-#include "cpu/thread_context.hh"
-
-class ThreadContext;
-
-namespace SparcISA
-{
-
-class Predecoder
-{
- protected:
- ThreadContext * tc;
- // The extended machine instruction being generated
- ExtMachInst emi;
- bool emiIsReady;
-
- public:
- Predecoder(ThreadContext * _tc) : tc(_tc), emiIsReady(false)
- {}
-
- ThreadContext *
- getTC()
- {
- return tc;
- }
-
- void
- setTC(ThreadContext * _tc)
- {
- tc = _tc;
- }
-
- void process() {}
-
- void
- reset()
- {
- emiIsReady = false;
- }
-
- // Use this to give data to the predecoder. This should be used
- // when there is control flow.
- void
- moreBytes(const PCState &pc, Addr fetchPC, MachInst inst)
- {
- emi = inst;
- // The I bit, bit 13, is used to figure out where the ASI
- // should come from. Use that in the ExtMachInst. This is
- // slightly redundant, but it removes the need to put a condition
- // into all the execute functions
- if (inst & (1 << 13)) {
- emi |= (static_cast<ExtMachInst>(
- tc->readMiscRegNoEffect(MISCREG_ASI))
- << (sizeof(MachInst) * 8));
- } else {
- emi |= (static_cast<ExtMachInst>(bits(inst, 12, 5))
- << (sizeof(MachInst) * 8));
- }
- emiIsReady = true;
- }
-
- bool
- needMoreBytes()
- {
- return true;
- }
-
- bool
- extMachInstReady()
- {
- return emiIsReady;
- }
-
- // This returns a constant reference to the ExtMachInst to avoid a copy
- const ExtMachInst &
- getExtMachInst(PCState &pcState)
- {
- emiIsReady = false;
- return emi;
- }
-};
-};
-
-#endif // __ARCH_SPARC_PREDECODER_HH__