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// -*- mode:c++ -*-
// Copyright (c) 2007 MIPS Technologies, Inc.
// 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: Korey Sewell
// Brett Miller
////////////////////////////////////////////////////////////////////
//
// DSP integer operate instructions
//
output header {{
#include <iostream>
using namespace std;
/**
* Base class for integer operations.
*/
class DspIntOp : public MipsStaticInst
{
protected:
/// Constructor
DspIntOp(const char *mnem, MachInst _machInst, OpClass __opClass) :
MipsStaticInst(mnem, _machInst, __opClass)
{
}
};
class DspHiLoOp : public MipsStaticInst
{
protected:
/// Constructor
DspHiLoOp(const char *mnem, MachInst _machInst, OpClass __opClass) :
MipsStaticInst(mnem, _machInst, __opClass)
{
}
};
}};
// Dsp instruction class execute method template.
def template DspExecute {{
Fault %(class_name)s::execute(%(CPU_exec_context)s *xc, Trace::InstRecord *traceData) const
{
Fault fault = NoFault;
%(op_decl)s;
if (isDspPresent(xc))
{
if (isDspEnabled(xc))
{
%(op_rd)s;
%(code)s;
}
else
{
fault = new DspStateDisabledFault();
}
}
else
{
fault = new ReservedInstructionFault();
}
if(fault == NoFault)
{
%(op_wb)s;
}
return fault;
}
}};
// DspHiLo instruction class execute method template.
def template DspHiLoExecute {{
Fault %(class_name)s::execute(%(CPU_exec_context)s *xc, Trace::InstRecord *traceData) const
{
Fault fault = NoFault;
%(op_decl)s;
if (isDspPresent(xc))
{
if (isDspEnabled(xc))
{
%(op_rd)s;
%(code)s;
}
else
{
fault = new DspStateDisabledFault();
}
}
else
{
fault = new ReservedInstructionFault();
}
if(fault == NoFault)
{
%(op_wb)s;
//If there are 2 Destination Registers then
//concatenate the values for the traceData
if(traceData && _numDestRegs == 2) {
// FIXME - set the trace value correctly here
//uint64_t hilo_final_val = (uint64_t)HI_RD_SEL << 32 | LO_RD_SEL;
//traceData->setData(hilo_final_val);
}
}
return fault;
}
}};
//Outputs to decoder.cc
output decoder {{
}};
output exec {{
bool isDspEnabled(%(CPU_exec_context)s *xc)
{
#if FULL_SYSTEM
if( bits( xc->readMiscReg(MISCREG_STATUS), 24, 24 ) == 0 )
return false;
#else
//printf("Syscall Emulation Mode: isDspEnabled() check defaults to TRUE\n");
#endif
return true;
}
}};
output exec {{
bool isDspPresent(%(CPU_exec_context)s *xc)
{
#if FULL_SYSTEM
if( bits( xc->readMiscReg(MISCREG_CONFIG3), 10, 10 ) == 0 )
return false;
#else
//printf("Syscall Emulation Mode: isDspPresent() check defaults to TRUE\n");
#endif
return true;
}
}};
// add code to fetch the DSPControl register
// and write it back after execution, giving
// the instruction the opportunity to modify
// it if necessary
def format DspIntOp(code, *opt_flags) {{
decl_code = 'uint32_t dspctl;\n'
decl_code += 'dspctl = DSPControl;\n'
write_code = 'DSPControl = dspctl;\n'
code = decl_code + code + write_code
opt_flags += ('IsDspOp',)
iop = InstObjParams(name, Name, 'DspIntOp', code, opt_flags)
header_output = BasicDeclare.subst(iop)
decoder_output = BasicConstructor.subst(iop)
decode_block = BasicDecode.subst(iop)
exec_output = DspExecute.subst(iop)
}};
// add code to fetch the DSPControl register
// and write it back after execution, giving
// the instruction the opportunity to modify
// it if necessary; also, fetch the appropriate
// HI/LO register pair, based on the AC
// instruction field.
def format DspHiLoOp(code, *opt_flags) {{
decl_code = 'int64_t dspac;\n'
decl_code += 'uint32_t dspctl;\n'
fetch_code = 'dspctl = DSPControl;\n'
fetch_code += 'dspac = HI_RD_SEL;\n'
fetch_code += 'dspac = dspac << 32 | LO_RD_SEL;\n'
write_code = 'DSPControl = dspctl;\n'
write_code += 'HI_RD_SEL = dspac<63:32>;\n'
write_code += 'LO_RD_SEL = dspac<31:0>;\n'
code = decl_code + fetch_code + code + write_code
opt_flags += ('IsDspOp',)
iop = InstObjParams(name, Name, 'DspHiLoOp', code, opt_flags)
header_output = BasicDeclare.subst(iop)
decoder_output = BasicConstructor.subst(iop)
decode_block = BasicDecode.subst(iop)
exec_output = DspHiLoExecute.subst(iop)
}};
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