static_inst.hh

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/*
 * Copyright (c) 2007 The Hewlett-Packard Development Company
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 *
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 * met: redistributions of source code must retain the above copyright
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#ifndef __ARCH_X86_INSTS_STATICINST_HH__
#define __ARCH_X86_INSTS_STATICINST_HH__
 
#include "base/trace.hh"
#include "cpu/static_inst.hh"
#include "debug/X86.hh"
 
namespace X86ISA
{
    struct InstRegIndex : public RegId
    {
        explicit InstRegIndex(RegIndex _idx) :
           RegId(computeRegClass(_idx), _idx) {}
 
      private:
        // TODO: As X86 register index definition is highly built on the
        //       unified space concept, it is easier for the moment to rely on
        //       an helper function to compute the RegClass. It would be nice
        //       to fix those definition and get rid of this.
        RegClass computeRegClass(RegIndex _idx) {
            if (_idx < FP_Reg_Base) {
                return IntRegClass;
            } else if (_idx < CC_Reg_Base) {
                return FloatRegClass;
            } else if (_idx < Misc_Reg_Base) {
                return CCRegClass;
            } else {
                return MiscRegClass;
            }
        }
    };
 
    class X86StaticInst : public StaticInst
    {
      protected:
        // Constructor.
        X86StaticInst(const char *mnem,
             ExtMachInst _machInst, OpClass __opClass)
                : StaticInst(mnem, _machInst, __opClass)
            {
            }
 
        std::string generateDisassembly(
                Addr pc, const Loader::SymbolTable *symtab) const override;
 
        void printMnemonic(std::ostream &os, const char * mnemonic) const;
        void printMnemonic(std::ostream &os, const char * instMnemonic,
                const char * mnemonic) const;
 
        void printSegment(std::ostream &os, int segment) const;
 
        void printReg(std::ostream &os, RegId reg, int size) const;
        void printSrcReg(std::ostream &os, int reg, int size) const;
        void printDestReg(std::ostream &os, int reg, int size) const;
        void printMem(std::ostream &os, uint8_t segment,
                uint8_t scale, RegIndex index, RegIndex base,
                uint64_t disp, uint8_t addressSize, bool rip) const;
 
        inline uint64_t merge(uint64_t into, uint64_t val, int size) const
        {
            X86IntReg reg = into;
            if (_destRegIdx[0].index() & IntFoldBit)
            {
                reg.H = val;
                return reg;
            }
            switch(size)
            {
              case 1:
                reg.L = val;
                break;
              case 2:
                reg.X = val;
                break;
              case 4:
                //XXX Check if this should be zeroed or sign extended
                reg = 0;
                reg.E = val;
                break;
              case 8:
                reg.R = val;
                break;
              default:
                panic("Tried to merge with unrecognized size %d.\n", size);
            }
            return reg;
        }
 
        inline uint64_t pick(uint64_t from, int idx, int size) const
        {
            X86IntReg reg = from;
            DPRINTF(X86, "Picking with size %d\n", size);
            if (_srcRegIdx[idx].index() & IntFoldBit)
                return reg.H;
            switch(size)
            {
              case 1:
                return reg.L;
              case 2:
                return reg.X;
              case 4:
                return reg.E;
              case 8:
                return reg.R;
              default:
                panic("Tried to pick with unrecognized size %d.\n", size);
            }
        }
 
        inline int64_t signedPick(uint64_t from, int idx, int size) const
        {
            X86IntReg reg = from;
            DPRINTF(X86, "Picking with size %d\n", size);
            if (_srcRegIdx[idx].index() & IntFoldBit)
                return reg.SH;
            switch(size)
            {
              case 1:
                return reg.SL;
              case 2:
                return reg.SX;
              case 4:
                return reg.SE;
              case 8:
                return reg.SR;
              default:
                panic("Tried to pick with unrecognized size %d.\n", size);
            }
        }
 
        void
        advancePC(PCState &pcState) const override
        {
            pcState.advance();
        }
    };
}
 
#endif //__ARCH_X86_INSTS_STATICINST_HH__