// -*- mode:c++ -*-
// Copyright (c) 2007-2008 The Florida State University
// 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: Stephen Hines
////////////////////////////////////////////////////////////////////
//
// Predicated Instruction Execution
//
let {{
predicateTest = 'testPredicate(Cpsr, condCode)'
}};
def template PredOpExecute {{
Fault %(class_name)s::execute(%(CPU_exec_context)s *xc, Trace::InstRecord *traceData) const
{
Fault fault = NoFault;
uint64_t resTemp = 0;
resTemp = resTemp;
%(op_decl)s;
%(op_rd)s;
if (%(predicate_test)s)
{
%(code)s;
if (fault == NoFault)
{
%(op_wb)s;
}
}
return fault;
}
}};
def template DataDecode {{
if (machInst.opcode4 == 0) {
if (machInst.sField == 0)
return new %(class_name)sImm(machInst);
else
return new %(class_name)sImmCc(machInst);
} else {
if (machInst.sField == 0)
return new %(class_name)s(machInst);
else
return new %(class_name)sCc(machInst);
}
}};
def template DataImmDecode {{
if (machInst.sField == 0)
return new %(class_name)s(machInst);
else
return new %(class_name)sCc(machInst);
}};
let {{
calcCcCode = '''
uint16_t _ic, _iv, _iz, _in;
_in = (resTemp >> 31) & 1;
_iz = (resTemp == 0);
_iv = %(ivValue)s & 1;
_ic = %(icValue)s & 1;
Cpsr = _in << 31 | _iz << 30 | _ic << 29 | _iv << 28 |
(Cpsr & 0x0FFFFFFF);
DPRINTF(Arm, "in = %%d\\n", _in);
DPRINTF(Arm, "iz = %%d\\n", _iz);
DPRINTF(Arm, "ic = %%d\\n", _ic);
DPRINTF(Arm, "iv = %%d\\n", _iv);
'''
}};
let {{
def getCcCode(flagtype):
icReg = icImm = iv = ''
if flagtype == "none":
icReg = icImm = 'Cpsr<29:>'
iv = 'Cpsr<28:>'
elif flagtype == "add":
icReg = icImm = 'findCarry(32, resTemp, Rn, op2)'
iv = 'findOverflow(32, resTemp, Rn, op2)'
elif flagtype == "sub":
icReg = icImm ='findCarry(32, resTemp, Rn, ~op2)'
iv = 'findOverflow(32, resTemp, Rn, ~op2)'
elif flagtype == "rsb":
icReg = icImm = 'findCarry(32, resTemp, op2, ~Rn)'
iv = 'findOverflow(32, resTemp, op2, ~Rn)'
else:
icReg = 'shift_carry_rs(Rm, Rs, shift, Cpsr<29:>)'
icImm = 'shift_carry_imm(Rm, shift_size, shift, Cpsr<29:>)'
iv = 'Cpsr<28:>'
return (calcCcCode % {"icValue" : icReg, "ivValue" : iv},
calcCcCode % {"icValue" : icImm, "ivValue" : iv})
def getImmCcCode(flagtype):
ivValue = icValue = ''
if flagtype == "none":
icValue = 'Cpsr<29:>'
ivValue = 'Cpsr<28:>'
elif flagtype == "add":
icValue = 'findCarry(32, resTemp, Rn, rotated_imm)'
ivValue = 'findOverflow(32, resTemp, Rn, rotated_imm)'
elif flagtype == "sub":
icValue = 'findCarry(32, resTemp, Rn, ~rotated_imm)'
ivValue = 'findOverflow(32, resTemp, Rn, ~rotated_imm)'
elif flagtype == "rsb":
icValue = 'findCarry(32, resTemp, rotated_imm, ~Rn)'
ivValue = 'findOverflow(32, resTemp, rotated_imm, ~Rn)'
else:
icValue = '(rotate ? rotated_carry:Cpsr<29:>)'
ivValue = 'Cpsr<28:>'
return calcCcCode % vars()
}};
def format DataOp(code, flagtype = logic) {{
(regCcCode, immCcCode) = getCcCode(flagtype)
regCode = '''uint32_t op2 = shift_rm_rs(Rm, Rs,
shift, Cpsr<29:0>);
op2 = op2;''' + code
immCode = '''uint32_t op2 = shift_rm_imm(Rm, shift_size,
shift, Cpsr<29:0>);
op2 = op2;''' + code
regIop = InstObjParams(name, Name, 'PredIntOp',
{"code": regCode,
"predicate_test": predicateTest})
immIop = InstObjParams(name, Name + "Imm", 'PredIntOp',
{"code": immCode,
"predicate_test": predicateTest})
regCcIop = InstObjParams(name, Name + "Cc", 'PredIntOp',
{"code": regCode + regCcCode,
"predicate_test": predicateTest})
immCcIop = InstObjParams(name, Name + "ImmCc", 'PredIntOp',
{"code": immCode + immCcCode,
"predicate_test": predicateTest})
header_output = BasicDeclare.subst(regIop) + \
BasicDeclare.subst(immIop) + \
BasicDeclare.subst(regCcIop) + \
BasicDeclare.subst(immCcIop)
decoder_output = BasicConstructor.subst(regIop) + \
BasicConstructor.subst(immIop) + \
BasicConstructor.subst(regCcIop) + \
BasicConstructor.subst(immCcIop)
exec_output = PredOpExecute.subst(regIop) + \
PredOpExecute.subst(immIop) + \
PredOpExecute.subst(regCcIop) + \
PredOpExecute.subst(immCcIop)
decode_block = DataDecode.subst(regIop)
}};
def format DataImmOp(code, flagtype = logic) {{
code += "resTemp = resTemp;"
iop = InstObjParams(name, Name, 'PredImmOp',
{"code": code,
"predicate_test": predicateTest})
ccIop = InstObjParams(name, Name + "Cc", 'PredImmOp',
{"code": code + getImmCcCode(flagtype),
"predicate_test": predicateTest})
header_output = BasicDeclare.subst(iop) + \
BasicDeclare.subst(ccIop)
decoder_output = BasicConstructor.subst(iop) + \
BasicConstructor.subst(ccIop)
exec_output = PredOpExecute.subst(iop) + \
PredOpExecute.subst(ccIop)
decode_block = DataImmDecode.subst(iop)
}};
def format PredOp(code, *opt_flags) {{
iop = InstObjParams(name, Name, 'PredOp',
{"code": code,
"predicate_test": predicateTest},
opt_flags)
header_output = BasicDeclare.subst(iop)
decoder_output = BasicConstructor.subst(iop)
decode_block = BasicDecode.subst(iop)
exec_output = PredOpExecute.subst(iop)
}};
def format PredImmOp(code, *opt_flags) {{
iop = InstObjParams(name, Name, 'PredImmOp',
{"code": code,
"predicate_test": predicateTest},
opt_flags)
header_output = BasicDeclare.subst(iop)
decoder_output = BasicConstructor.subst(iop)
decode_block = BasicDecode.subst(iop)
exec_output = PredOpExecute.subst(iop)
}};
def format PredImmOpCc(code, icValue, ivValue, *opt_flags) {{
ccCode = calcCcCode % vars()
code += ccCode;
iop = InstObjParams(name, Name, 'PredImmOp',
{"code": code,
"cc_code": ccCode,
"predicate_test": predicateTest},
opt_flags)
header_output = BasicDeclare.subst(iop)
decoder_output = BasicConstructor.subst(iop)
decode_block = BasicDecode.subst(iop)
exec_output = PredOpExecute.subst(iop)
}};
def format PredIntOp(code, *opt_flags) {{
new_code = ArmGenericCodeSubs(code)
iop = InstObjParams(name, Name, 'PredIntOp',
{"code": new_code,
"predicate_test": predicateTest},
opt_flags)
header_output = BasicDeclare.subst(iop)
decoder_output = BasicConstructor.subst(iop)
decode_block = BasicDecode.subst(iop)
exec_output = PredOpExecute.subst(iop)
}};
def format PredIntOpCc(code, icValue, ivValue, *opt_flags) {{
ccCode = calcCcCode % vars()
code += ccCode;
new_code = ArmGenericCodeSubs(code)
iop = InstObjParams(name, Name, 'PredIntOp',
{"code": new_code,
"cc_code": ccCode,
"predicate_test": predicateTest},
opt_flags)
header_output = BasicDeclare.subst(iop)
decoder_output = BasicConstructor.subst(iop)
decode_block = BasicDecode.subst(iop)
exec_output = PredOpExecute.subst(iop)
}};