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

// -*- mode:c++ -*-
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// 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))
    '''
    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))
    '''

    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', 0,
             maybePCRead, maybePCWrite),
    'IWDest': ('IntReg', 'uw', 'dest', 'IsInteger', 0,
               maybePCRead, maybeIWPCWrite),
    'AIWDest': ('IntReg', 'uw', 'dest', 'IsInteger', 0,
                maybePCRead, maybeIWPCWrite),
    'Base': ('IntReg', 'uw', 'base', 'IsInteger', 1,
             maybePCRead, maybePCWrite),
    'Index': ('IntReg', 'uw', 'index', 'IsInteger', 2,
              maybePCRead, maybePCWrite),
    'Op1': ('IntReg', 'uw', 'op1', 'IsInteger', 3,
              maybePCRead, maybePCWrite),
    'Op2': ('IntReg', 'uw', 'op2', 'IsInteger', 4,
              maybePCRead, maybePCWrite),
    'Shift': ('IntReg', 'uw', 'shift', 'IsInteger', 5,
              maybePCRead, maybePCWrite),
    #General Purpose Integer Reg Operands
    'Rd': ('IntReg', 'uw', 'RD', 'IsInteger', 1, maybePCRead, maybePCWrite),
    'Rm': ('IntReg', 'uw', 'RM', 'IsInteger', 2, maybePCRead, maybePCWrite),
    'Rs': ('IntReg', 'uw', 'RS', 'IsInteger', 3, maybePCRead, maybePCWrite),
    'Rn': ('IntReg', 'uw', 'RN', 'IsInteger', 4, maybePCRead, maybePCWrite),
    'R7': ('IntReg', 'uw', '7', 'IsInteger', 5),
    'R0': ('IntReg', 'uw', '0', 'IsInteger', 0),

    #Destination register for load/store double instructions
    'Rdo': ('IntReg', 'uw', '(RD & ~1)', 'IsInteger', 4, maybePCRead, maybePCWrite),
    'Rde': ('IntReg', 'uw', '(RD | 1)', 'IsInteger', 5, maybePCRead, maybePCWrite),

    'Rhi': ('IntReg', 'uw', 'INTREG_RHI', 'IsInteger', 7),
    'Rlo': ('IntReg', 'uw', 'INTREG_RLO', 'IsInteger', 8),
    'LR': ('IntReg', 'uw', 'INTREG_LR', 'IsInteger', 9),
    'CondCodes': ('IntReg', 'uw', 'INTREG_CONDCODES', None, 10),

    #Register fields for microops
    'Ra' : ('IntReg', 'uw', 'ura', 'IsInteger', 11, maybePCRead, maybePCWrite),
    'Rb' : ('IntReg', 'uw', 'urb', 'IsInteger', 12, maybePCRead, maybePCWrite),

    #General Purpose Floating Point Reg Operands
    'Fd': ('FloatReg', 'df', 'FD', 'IsFloating', 20),
    'Fn': ('FloatReg', 'df', 'FN', 'IsFloating', 21),
    'Fm': ('FloatReg', 'df', 'FM', 'IsFloating', 22),

    #Memory Operand
    'Mem': ('Mem', 'uw', None, ('IsMemRef', 'IsLoad', 'IsStore'), 30),

    'Cpsr': ('ControlReg', 'uw', 'MISCREG_CPSR', (None, None, 'IsControl'), 40),
    'Spsr': ('ControlReg', 'uw', 'MISCREG_SPSR', None, 41),
    'Fpsr': ('ControlReg', 'uw', 'MISCREG_FPSR', None, 42),
    'Fpsid': ('ControlReg', 'uw', 'MISCREG_FPSID', None, 43),
    'Fpscr': ('ControlReg', 'uw', 'MISCREG_FPSCR', None, 44),
    'Fpexc': ('ControlReg', 'uw', 'MISCREG_FPEXC', None, 45),
    'NPC': ('NPC', 'ud', None, (None, None, 'IsControl'), 51,
            readNPC, writeNPC),
    'FNPC': ('NPC', 'ud', None, (None, None, 'IsControl'), 51,
             readNPC, forceNPC),
    'IWNPC': ('NPC', 'ud', None, (None, None, 'IsControl'), 51,
              readNPC, writeIWNPC),
}};