static_inst.hh

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/*
 * Copyright (c) 2006-2007 The Regents of The University of Michigan
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 * Copyright 2017 Google Inc.
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 * notice, this list of conditions and the following disclaimer;
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 * neither the name of the copyright holders nor the names of its
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#ifndef __ARCH_SPARC_INSTS_STATIC_INST_HH__
#define __ARCH_SPARC_INSTS_STATIC_INST_HH__
 
#include <cstdint>
 
#include "arch/sparc/pcstate.hh"
#include "arch/sparc/types.hh"
#include "base/trace.hh"
#include "cpu/exec_context.hh"
#include "cpu/static_inst.hh"
#include "cpu/thread_context.hh"
 
namespace gem5
{
 
namespace SparcISA
{
 
enum CondTest
{
    Always=0x8,
    Never=0x0,
    NotEqual=0x9,
    Equal=0x1,
    Greater=0xA,
    LessOrEqual=0x2,
    GreaterOrEqual=0xB,
    Less=0x3,
    GreaterUnsigned=0xC,
    LessOrEqualUnsigned=0x4,
    CarryClear=0xD,
    CarrySet=0x5,
    Positive=0xE,
    Negative=0x6,
    OverflowClear=0xF,
    OverflowSet=0x7
};
 
extern const char *CondTestAbbrev[];
 
enum FpCondTest
{
    FAlways=0x8,
    FNever=0x0,
    FUnordered=0x7,
    FGreater=0x6,
    FUnorderedOrGreater=0x5,
    FLess=0x4,
    FUnorderedOrLess=0x3,
    FLessOrGreater=0x2,
    FNotEqual=0x1,
    FEqual=0x9,
    FUnorderedOrEqual=0xA,
    FGreaterOrEqual=0xB,
    FUnorderedOrGreaterOrEqual=0xC,
    FLessOrEqual=0xD,
    FUnorderedOrLessOrEqual=0xE,
    FOrdered=0xF
};
 
class SparcStaticInst : public StaticInst
{
  protected:
    ExtMachInst machInst;
 
    SparcStaticInst(const char *_mnemonic, ExtMachInst _machInst,
            OpClass __opClass) :
        StaticInst(_mnemonic, __opClass), machInst(_machInst)
    {}
 
    std::string generateDisassembly(
            Addr pc, const loader::SymbolTable *symtab) const override;
 
    static void printMnemonic(std::ostream &os, const char *mnemonic);
    static void printReg(std::ostream &os, RegId reg);
 
    void printSrcReg(std::ostream &os, int reg) const;
    void printDestReg(std::ostream &os, int reg) const;
 
    void printRegArray(std::ostream &os,
        const RegId *indexArray, int num) const;
 
    void advancePC(PCStateBase &pcState) const override;
    void advancePC(ThreadContext *tc) const override;
 
    static bool passesFpCondition(uint32_t fcc, uint32_t condition);
    static bool passesCondition(uint32_t codes, uint32_t condition);
 
    size_t
    asBytes(void *buf, size_t size) override
    {
        return simpleAsBytes(buf, size, machInst);
    }
 
    std::unique_ptr<PCStateBase>
    buildRetPC(const PCStateBase &cur_pc,
            const PCStateBase &call_pc) const override
    {
        PCStateBase *ret_ptr = call_pc.clone();
        auto &ret = ret_ptr->as<PCState>();
        ret.uEnd();
        ret.pc(cur_pc.as<PCState>().npc());
        return std::unique_ptr<PCStateBase>{ret_ptr};
    }
};
 
} // namespace SparcISA
} // namespace gem5
 
#endif //__ARCH_SPARC_INSTS_STATIC_INST_HH__