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

/*
 * Copyright (c) 2007 The Hewlett-Packard Development Company
 * All rights reserved.
 *
 * Redistribution and use of this software in source and binary forms,
 * with or without modification, are permitted provided that the
 * following conditions are met:
 *
 * The software must be used only for Non-Commercial Use which means any
 * use which is NOT directed to receiving any direct monetary
 * compensation for, or commercial advantage from such use.  Illustrative
 * examples of non-commercial use are academic research, personal study,
 * teaching, education and corporate research & development.
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 * commercial advantage.
 *
 * If you wish to use this software or functionality therein that may be
 * covered by patents for commercial use, please contact:
 *     Director of Intellectual Property Licensing
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 *     Hewlett-Packard Company
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 *
 * 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
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 * other materials provided with the distribution.  Neither the name of
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 * this software without specific prior written permission.  No right of
 * sublicense is granted herewith.  Derivatives of the software and
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 * Non-Commercial Uses.  Derivatives of the software may be shared with
 * others provided: (i) the others agree to abide by the list of
 * conditions herein which includes the Non-Commercial Use restrictions;
 * 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
 * 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,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * Authors: Gabe Black
 */

#include "arch/x86/insts/static_inst.hh"
#include "arch/x86/segmentregs.hh"

namespace X86ISA
{
    void X86StaticInst::printMnemonic(std::ostream &os,
            const char * mnemonic) const
    {
        ccprintf(os, "\t%s   ", mnemonic);
    }

    void X86StaticInst::printMnemonic(std::ostream &os,
            const char * instMnemonic, const char * mnemonic) const
    {
        ccprintf(os, "\t%s : %s   ", instMnemonic, mnemonic);
    }

    void X86StaticInst::printSegment(std::ostream &os, int segment) const
    {
        switch (segment)
        {
          case SEGMENT_REG_ES:
            ccprintf(os, "ES");
            break;
          case SEGMENT_REG_CS:
            ccprintf(os, "CS");
            break;
          case SEGMENT_REG_SS:
            ccprintf(os, "SS");
            break;
          case SEGMENT_REG_DS:
            ccprintf(os, "DS");
            break;
          case SEGMENT_REG_FS:
            ccprintf(os, "FS");
            break;
          case SEGMENT_REG_GS:
            ccprintf(os, "GS");
            break;
          case SEGMENT_REG_INT:
            ccprintf(os, "INT");
            break;
          default:
            panic("Unrecognized segment %d\n", segment);
        }
    }

    void
    X86StaticInst::printSrcReg(std::ostream &os, int reg, int size) const
    {
        if(_numSrcRegs > reg)
            printReg(os, _srcRegIdx[reg], size);
    }

    void
    X86StaticInst::printDestReg(std::ostream &os, int reg, int size) const
    {
        if(_numDestRegs > reg)
            printReg(os, _destRegIdx[reg], size);
    }

    void
    X86StaticInst::printReg(std::ostream &os, int reg, int size) const
    {
        assert(size == 1 || size == 2 || size == 4 || size == 8);
        static const char * abcdFormats[9] =
            {"", "%s",  "%sx",  "", "e%sx", "", "", "", "r%sx"};
        static const char * piFormats[9] =
            {"", "%s",  "%s",   "", "e%s",  "", "", "", "r%s"};
        static const char * longFormats[9] =
            {"", "r%sb", "r%sw", "", "r%sd", "", "", "", "r%s"};
        static const char * microFormats[9] =
            {"", "t%db", "t%dw", "", "t%dd", "", "", "", "t%d"};

        if (reg < FP_Base_DepTag) {
            const char * suffix = "";
            bool fold = reg & (1 << 6);
            reg &= ~(1 << 6);

            if(fold)
            {
                suffix = "h";
                reg -= 4;
            }
            else if(reg < 8 && size == 1)
                suffix = "l";

            switch (reg) {
              case INTREG_RAX:
                ccprintf(os, abcdFormats[size], "a");
                break;
              case INTREG_RBX:
                ccprintf(os, abcdFormats[size], "b");
                break;
              case INTREG_RCX:
                ccprintf(os, abcdFormats[size], "c");
                break;
              case INTREG_RDX:
                ccprintf(os, abcdFormats[size], "d");
                break;
              case INTREG_RSP:
                ccprintf(os, piFormats[size], "sp");
                break;
              case INTREG_RBP:
                ccprintf(os, piFormats[size], "bp");
                break;
              case INTREG_RSI:
                ccprintf(os, piFormats[size], "si");
                break;
              case INTREG_RDI:
                ccprintf(os, piFormats[size], "di");
                break;
              case INTREG_R8W:
                ccprintf(os, longFormats[size], "8");
                break;
              case INTREG_R9W:
                ccprintf(os, longFormats[size], "9");
                break;
              case INTREG_R10W:
                ccprintf(os, longFormats[size], "10");
                break;
              case INTREG_R11W:
                ccprintf(os, longFormats[size], "11");
                break;
              case INTREG_R12W:
                ccprintf(os, longFormats[size], "12");
                break;
              case INTREG_R13W:
                ccprintf(os, longFormats[size], "13");
                break;
              case INTREG_R14W:
                ccprintf(os, longFormats[size], "14");
                break;
              case INTREG_R15W:
                ccprintf(os, longFormats[size], "15");
                break;
              default:
                ccprintf(os, microFormats[size], reg - NUM_INTREGS);
            }
            ccprintf(os, suffix);
        } else if (reg < Ctrl_Base_DepTag) {
            int fpindex = reg - FP_Base_DepTag;
            if(fpindex < NumMMXRegs) {
                ccprintf(os, "%%mmx%d", reg - FP_Base_DepTag);
                return;
            }
            fpindex -= NumMMXRegs;
            if(fpindex < NumXMMRegs * 2) {
                ccprintf(os, "%%xmm%d_%s", fpindex / 2,
                        (fpindex % 2) ? "high": "low");
                return;
            }
            fpindex -= NumXMMRegs * 2;
            if(fpindex < NumMicroFpRegs) {
                ccprintf(os, "%%ufp%d", fpindex);
                return;
            }
            fpindex -= NumMicroFpRegs;
            ccprintf(os, "%%st(%d)", fpindex);
        } else {
            switch (reg - Ctrl_Base_DepTag) {
              default:
                ccprintf(os, "%%ctrl%d", reg - Ctrl_Base_DepTag);
            }
        }
    }

    std::string X86StaticInst::generateDisassembly(Addr pc,
        const SymbolTable *symtab) const
    {
        std::stringstream ss;

        printMnemonic(ss, mnemonic);

        return ss.str();
    }
}