Support for returning unimplemented instruction in the decoder, lifted from Alpha
--HG-- extra : convert_revision : 7e26053696b23fbc0b8cd5827a5072dcf2526e2b
This commit is contained in:
parent
866cfaf9dc
commit
dd217a9d3f
1 changed files with 147 additions and 0 deletions
147
src/arch/sparc/isa/formats/unimp.isa
Normal file
147
src/arch/sparc/isa/formats/unimp.isa
Normal file
|
@ -0,0 +1,147 @@
|
||||||
|
// -*- mode:c++ -*-
|
||||||
|
|
||||||
|
// 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.
|
||||||
|
//
|
||||||
|
// Authors: Steve Reinhardt
|
||||||
|
|
||||||
|
////////////////////////////////////////////////////////////////////
|
||||||
|
//
|
||||||
|
// Unimplemented instructions
|
||||||
|
//
|
||||||
|
|
||||||
|
output header {{
|
||||||
|
/**
|
||||||
|
* Static instruction class for unimplemented instructions that
|
||||||
|
* cause simulator termination. Note that these are recognized
|
||||||
|
* (legal) instructions that the simulator does not support; the
|
||||||
|
* 'Unknown' class is used for unrecognized/illegal instructions.
|
||||||
|
* This is a leaf class.
|
||||||
|
*/
|
||||||
|
class FailUnimplemented : public SparcStaticInst
|
||||||
|
{
|
||||||
|
public:
|
||||||
|
/// Constructor
|
||||||
|
FailUnimplemented(const char *_mnemonic, ExtMachInst _machInst)
|
||||||
|
: SparcStaticInst(_mnemonic, _machInst, No_OpClass)
|
||||||
|
{
|
||||||
|
// don't call execute() (which panics) if we're on a
|
||||||
|
// speculative path
|
||||||
|
flags[IsNonSpeculative] = true;
|
||||||
|
}
|
||||||
|
|
||||||
|
%(BasicExecDeclare)s
|
||||||
|
|
||||||
|
std::string
|
||||||
|
generateDisassembly(Addr pc, const SymbolTable *symtab) const;
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Base class for unimplemented instructions that cause a warning
|
||||||
|
* to be printed (but do not terminate simulation). This
|
||||||
|
* implementation is a little screwy in that it will print a
|
||||||
|
* warning for each instance of a particular unimplemented machine
|
||||||
|
* instruction, not just for each unimplemented opcode. Should
|
||||||
|
* probably make the 'warned' flag a static member of the derived
|
||||||
|
* class.
|
||||||
|
*/
|
||||||
|
class WarnUnimplemented : public SparcStaticInst
|
||||||
|
{
|
||||||
|
private:
|
||||||
|
/// Have we warned on this instruction yet?
|
||||||
|
mutable bool warned;
|
||||||
|
|
||||||
|
public:
|
||||||
|
/// Constructor
|
||||||
|
WarnUnimplemented(const char *_mnemonic, ExtMachInst _machInst)
|
||||||
|
: SparcStaticInst(_mnemonic, _machInst, No_OpClass), warned(false)
|
||||||
|
{
|
||||||
|
// don't call execute() (which panics) if we're on a
|
||||||
|
// speculative path
|
||||||
|
flags[IsNonSpeculative] = true;
|
||||||
|
}
|
||||||
|
|
||||||
|
%(BasicExecDeclare)s
|
||||||
|
|
||||||
|
std::string
|
||||||
|
generateDisassembly(Addr pc, const SymbolTable *symtab) const;
|
||||||
|
};
|
||||||
|
}};
|
||||||
|
|
||||||
|
output decoder {{
|
||||||
|
std::string
|
||||||
|
FailUnimplemented::generateDisassembly(Addr pc,
|
||||||
|
const SymbolTable *symtab) const
|
||||||
|
{
|
||||||
|
return csprintf("%-10s (unimplemented)", mnemonic);
|
||||||
|
}
|
||||||
|
|
||||||
|
std::string
|
||||||
|
WarnUnimplemented::generateDisassembly(Addr pc,
|
||||||
|
const SymbolTable *symtab) const
|
||||||
|
{
|
||||||
|
#ifdef SS_COMPATIBLE_DISASSEMBLY
|
||||||
|
return csprintf("%-10s", mnemonic);
|
||||||
|
#else
|
||||||
|
return csprintf("%-10s (unimplemented)", mnemonic);
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
}};
|
||||||
|
|
||||||
|
output exec {{
|
||||||
|
Fault
|
||||||
|
FailUnimplemented::execute(%(CPU_exec_context)s *xc,
|
||||||
|
Trace::InstRecord *traceData) const
|
||||||
|
{
|
||||||
|
panic("attempt to execute unimplemented instruction '%s' "
|
||||||
|
"(inst 0x%08x)", mnemonic, machInst);
|
||||||
|
return NoFault;
|
||||||
|
}
|
||||||
|
|
||||||
|
Fault
|
||||||
|
WarnUnimplemented::execute(%(CPU_exec_context)s *xc,
|
||||||
|
Trace::InstRecord *traceData) const
|
||||||
|
{
|
||||||
|
if (!warned) {
|
||||||
|
warn("instruction '%s' unimplemented\n", mnemonic);
|
||||||
|
warned = true;
|
||||||
|
}
|
||||||
|
|
||||||
|
return NoFault;
|
||||||
|
}
|
||||||
|
}};
|
||||||
|
|
||||||
|
|
||||||
|
def format FailUnimpl() {{
|
||||||
|
iop = InstObjParams(name, 'FailUnimplemented')
|
||||||
|
decode_block = BasicDecodeWithMnemonic.subst(iop)
|
||||||
|
}};
|
||||||
|
|
||||||
|
def format WarnUnimpl() {{
|
||||||
|
iop = InstObjParams(name, 'WarnUnimplemented')
|
||||||
|
decode_block = BasicDecodeWithMnemonic.subst(iop)
|
||||||
|
}};
|
||||||
|
|
Loading…
Reference in a new issue