src/arch/power/insts/static_inst.hh

/*
 * Copyright (c) 2009 The University of Edinburgh
 * 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,
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 */

#ifndef __ARCH_POWER_INSTS_STATICINST_HH__
#define __ARCH_POWER_INSTS_STATICINST_HH__

#include "arch/power/pcstate.hh"
#include "arch/power/types.hh"
#include "base/trace.hh"
#include "cpu/static_inst.hh"
#include "cpu/thread_context.hh"

namespace gem5
{

namespace PowerISA
{

class PowerStaticInst : public StaticInst
{
  protected:
    ExtMachInst machInst;

    // Constructor
    PowerStaticInst(const char *mnem, ExtMachInst _machInst, OpClass __opClass)
        : StaticInst(mnem, __opClass), machInst(_machInst)
    {
    }

    // Insert a condition value into a CR (condition register) field
    inline uint32_t
    insertCRField(uint32_t cr, uint32_t bf, uint32_t value) const
    {
        uint32_t bits = value << ((7 - bf) * 4);
        uint32_t mask = ~(0xf << ((7 - bf) * 4));
        return (cr & mask) | bits;
    }

    /// Print a register name for disassembly given the unique
    /// dependence tag number (FP or int).
    void
    printReg(std::ostream &os, RegId reg) const;

    std::string generateDisassembly(
            Addr pc, const loader::SymbolTable *symtab) const override;

    void
    advancePC(PCStateBase &pc_state) const override
    {
        pc_state.as<PCState>().advance();
    }

    void
    advancePC(ThreadContext *tc) const override
    {
        PCState pc = tc->pcState().as<PCState>();
        pc.advance();
        tc->pcState(pc);
    }

    std::unique_ptr<PCStateBase>
    buildRetPC(const PCStateBase &cur_pc,
            const PCStateBase &call_pc) const override
    {
        PCStateBase *ret_pc = call_pc.clone();
        ret_pc->as<PCState>().advance();
        return std::unique_ptr<PCStateBase>{ret_pc};
    }

    size_t
    asBytes(void *buf, size_t max_size) override
    {
        return simpleAsBytes(buf, max_size, machInst);
    }
};

} // namespace PowerISA
} // namespace gem5

#endif //__ARCH_POWER_INSTS_STATICINST_HH__