xref: /gem5/src/arch/arm/isa/operands.isa

// -*- mode:c++ -*-
// Copyright (c) 2010 ARM Limited
// All rights reserved
//
// The license below extends only to copyright in the software and shall
// not be construed as granting a license to any other intellectual
// property including but not limited to intellectual property relating
// to a hardware implementation of the functionality of the software
// licensed hereunder.  You may use the software subject to the license
// terms below provided that you ensure that this notice is replicated
// unmodified and in its entirety in all distributions of the software,
// modified or unmodified, in source code or in binary form.
//
// 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

def operand_types {{
    'sb' : ('signed int', 8),
    'ub' : ('unsigned int', 8),
    'sh' : ('signed int', 16),
    'uh' : ('unsigned int', 16),
    'sw' : ('signed int', 32),
    'uw' : ('unsigned int', 32),
    'ud' : ('unsigned int', 64),
    'sf' : ('float', 32),
    'df' : ('float', 64)
}};

let {{
    maybePCRead = '''
        ((%(reg_idx)s == PCReg) ? (readPC(xc) & ~PcModeMask) :
         xc->%(func)s(this, %(op_idx)s))
    '''
    maybeAlignedPCRead = '''
        ((%(reg_idx)s == PCReg) ? (roundDown(readPC(xc) & ~PcModeMask, 4)) :
         xc->%(func)s(this, %(op_idx)s))
    '''
    maybePCWrite = '''
        ((%(reg_idx)s == PCReg) ? setNextPC(xc, %(final_val)s) :
         xc->%(func)s(this, %(op_idx)s, %(final_val)s))
    '''
    maybeIWPCWrite = '''
        ((%(reg_idx)s == PCReg) ? setIWNextPC(xc, %(final_val)s) :
         xc->%(func)s(this, %(op_idx)s, %(final_val)s))
    '''
    maybeAIWPCWrite = '''
        if (%(reg_idx)s == PCReg) {
            bool thumb = THUMB;
            if (thumb) {
                setNextPC(xc, %(final_val)s);
            } else {
                setIWNextPC(xc, %(final_val)s);
            }
        } else {
            xc->%(func)s(this, %(op_idx)s, %(final_val)s);
        }
    '''

    readNPC = 'xc->readNextPC() & ~PcModeMask'
    writeNPC = 'setNextPC(xc, %(final_val)s)'
    writeIWNPC = 'setIWNextPC(xc, %(final_val)s)'
    forceNPC = 'xc->setNextPC(%(final_val)s)'
}};

def operands {{
    #Abstracted integer reg operands
    'Dest': ('IntReg', 'uw', 'dest', 'IsInteger', 2,
             maybePCRead, maybePCWrite),
    'Dest2': ('IntReg', 'uw', 'dest2', 'IsInteger', 2,
              maybePCRead, maybePCWrite),
    'IWDest': ('IntReg', 'uw', 'dest', 'IsInteger', 2,
               maybePCRead, maybeIWPCWrite),
    'AIWDest': ('IntReg', 'uw', 'dest', 'IsInteger', 2,
                maybePCRead, maybeAIWPCWrite),
    'MiscDest': ('ControlReg', 'uw', 'dest', (None, None, 'IsControl'), 2),
    'Base': ('IntReg', 'uw', 'base', 'IsInteger', 0,
             maybeAlignedPCRead, maybePCWrite),
    'Index': ('IntReg', 'uw', 'index', 'IsInteger', 2,
              maybePCRead, maybePCWrite),
    'Op1': ('IntReg', 'uw', 'op1', 'IsInteger', 2,
              maybePCRead, maybePCWrite),
    'MiscOp1': ('ControlReg', 'uw', 'op1', (None, None, 'IsControl'), 2),
    'Op2': ('IntReg', 'uw', 'op2', 'IsInteger', 2,
              maybePCRead, maybePCWrite),
    'Op3': ('IntReg', 'uw', 'op3', 'IsInteger', 2,
              maybePCRead, maybePCWrite),
    'Shift': ('IntReg', 'uw', 'shift', 'IsInteger', 2,
              maybePCRead, maybePCWrite),
    'Reg0': ('IntReg', 'uw', 'reg0', 'IsInteger', 2,
              maybePCRead, maybePCWrite),
    'Reg1': ('IntReg', 'uw', 'reg1', 'IsInteger', 2,
              maybePCRead, maybePCWrite),
    'Reg2': ('IntReg', 'uw', 'reg2', 'IsInteger', 2,
              maybePCRead, maybePCWrite),
    'Reg3': ('IntReg', 'uw', 'reg3', 'IsInteger', 2,
              maybePCRead, maybePCWrite),
    #General Purpose Integer Reg Operands
    'Rd': ('IntReg', 'uw', 'RD', 'IsInteger', 2, maybePCRead, maybePCWrite),
    'Rm': ('IntReg', 'uw', 'RM', 'IsInteger', 2, maybePCRead, maybePCWrite),
    'Rs': ('IntReg', 'uw', 'RS', 'IsInteger', 2, maybePCRead, maybePCWrite),
    'Rn': ('IntReg', 'uw', 'RN', 'IsInteger', 2, maybePCRead, maybePCWrite),
    'R7': ('IntReg', 'uw', '7', 'IsInteger', 2),
    'R0': ('IntReg', 'uw', '0', 'IsInteger', 2),

    'LR': ('IntReg', 'uw', 'INTREG_LR', 'IsInteger', 2),
    'CondCodes': ('IntReg', 'uw', 'INTREG_CONDCODES', None, 2),

    #Register fields for microops
    'Ra' : ('IntReg', 'uw', 'ura', 'IsInteger', 2, maybePCRead, maybePCWrite),
    'IWRa' : ('IntReg', 'uw', 'ura', 'IsInteger', 2,
            maybePCRead, maybeIWPCWrite),
    'Fa' : ('FloatReg', 'sf', 'ura', 'IsFloating', 2),
    'Rb' : ('IntReg', 'uw', 'urb', 'IsInteger', 2, maybePCRead, maybePCWrite),

    #General Purpose Floating Point Reg Operands
    'Fd': ('FloatReg', 'df', 'FD', 'IsFloating', 2),
    'Fn': ('FloatReg', 'df', 'FN', 'IsFloating', 2),
    'Fm': ('FloatReg', 'df', 'FM', 'IsFloating', 2),

    #Memory Operand
    'Mem': ('Mem', 'uw', None, ('IsMemRef', 'IsLoad', 'IsStore'), 2),

    'Cpsr': ('ControlReg', 'uw', 'MISCREG_CPSR', (None, None, 'IsControl'), 1),
    'Spsr': ('ControlReg', 'uw', 'MISCREG_SPSR', None, 2),
    'Fpsr': ('ControlReg', 'uw', 'MISCREG_FPSR', None, 2),
    'Fpsid': ('ControlReg', 'uw', 'MISCREG_FPSID', None, 2),
    'Fpscr': ('ControlReg', 'uw', 'MISCREG_FPSCR', None, 2),
    'Fpexc': ('ControlReg', 'uw', 'MISCREG_FPEXC', None, 2),
    'NPC': ('NPC', 'ud', None, (None, None, 'IsControl'), 2,
            readNPC, writeNPC),
    'FNPC': ('NPC', 'ud', None, (None, None, 'IsControl'), 2,
             readNPC, forceNPC),
    'IWNPC': ('NPC', 'ud', None, (None, None, 'IsControl'), 2,
              readNPC, writeIWNPC),
}};