xref: /gem5/src/arch/x86/insts/static_inst.hh

/*
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 *
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.  Redistributions
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 * Non-Commercial Uses.  Derivatives of the software may be shared with
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 * and (ii) such Derivatives of the software include the above copyright
 * notice to acknowledge the contribution from this software where
 * applicable, this list of conditions and the disclaimer below.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 * 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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 * Authors: Gabe Black
 */

#ifndef __ARCH_X86_INSTS_STATICINST_HH__
#define __ARCH_X86_INSTS_STATICINST_HH__

#include "cpu/static_inst.hh"

namespace X86ISA
{
    /**
     * Base class for all X86 static instructions.
     */

    class X86StaticInst : public StaticInst
    {
      protected:
        // Constructor.
        X86StaticInst(const char *mnem,
             ExtMachInst _machInst, OpClass __opClass)
                : StaticInst(mnem, _machInst, __opClass)
            {
            }

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

        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, int reg, int size) const;
        void printSrcReg(std::ostream &os, int reg, int size) const;
        void printDestReg(std::ostream &os, int reg, int size) const;

        inline uint64_t merge(uint64_t into, uint64_t val, int size) const
        {
            X86IntReg reg;
            reg = into;
            //FIXME This needs to be handle high bytes as well
            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 val;
        }

        inline uint64_t pick(uint64_t from, int size)
        {
            X86IntReg reg;
            reg = from;
            switch(size)
            {
              case 1:
                return reg.L;
              case 2:
                return reg.E;
              case 4:
                return reg.X;
              case 8:
                return reg.R;
              default:
                panic("Tried to pick with unrecognized size %d.\n", size);
            }
        }
    };
}

#endif //__ARCH_X86_INSTS_STATICINST_HH__