cpu/data_xfer8.cc

   1 /////////////////////////////////////////////////////////////////////////
   2 // $Id: data_xfer8.cc,v 1.26 2007/01/12 22:47:20 sshwarts Exp $
   3 /////////////////////////////////////////////////////////////////////////
   4 //
   5 //  Copyright (C) 2001  MandrakeSoft S.A.
   6 //
   7 //    MandrakeSoft S.A.
   8 //    43, rue d'Aboukir
   9 //    75002 Paris - France
  10 //    http://www.linux-mandrake.com/
  11 //    http://www.mandrakesoft.com/
  12 //
  13 //  This library is free software; you can redistribute it and/or
  14 //  modify it under the terms of the GNU Lesser General Public
  15 //  License as published by the Free Software Foundation; either
  16 //  version 2 of the License, or (at your option) any later version.
  17 //
  18 //  This library is distributed in the hope that it will be useful,
  19 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21 //  Lesser General Public License for more details.
  22 //
  23 //  You should have received a copy of the GNU Lesser General Public
  24 //  License along with this library; if not, write to the Free Software
  25 //  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  26
  27
  28 #define NEED_CPU_REG_SHORTCUTS 1
  29 #include "bochs.h"
  30 #include "cpu.h"
  31 #define LOG_THIS BX_CPU_THIS_PTR
  32
  33
  34 void BX_CPU_C::MOV_RLIb(bxInstruction_c *i)
  35 {
  36   BX_READ_8BIT_REGx(i->opcodeReg(),i->extend8bitL()) = i->Ib();
  37 }
  38
  39 void BX_CPU_C::MOV_RHIb(bxInstruction_c *i)
  40 {
  41   BX_CPU_THIS_PTR gen_reg[i->b1() & 0x03].word.byte.rh = i->Ib();
  42 }
  43
  44 void BX_CPU_C::MOV_EEbGb(bxInstruction_c *i)
  45 {
  46   write_virtual_byte(i->seg(), RMAddr(i), &BX_READ_8BIT_REGx(i->nnn(),i->extend8bitL()));
  47 }
  48
  49 void BX_CPU_C::MOV_EGbGb(bxInstruction_c *i)
  50 {
  51   Bit8u op2 = BX_READ_8BIT_REGx(i->nnn(),i->extend8bitL());
  52   BX_WRITE_8BIT_REGx(i->rm(), i->extend8bitL(), op2);
  53 }
  54
  55 void BX_CPU_C::MOV_GbEEb(bxInstruction_c *i)
  56 {
  57   read_virtual_byte(i->seg(), RMAddr(i), &BX_READ_8BIT_REGx(i->nnn(),i->extend8bitL()));
  58 }
  59
  60 void BX_CPU_C::MOV_GbEGb(bxInstruction_c *i)
  61 {
  62   Bit8u op2 = BX_READ_8BIT_REGx(i->rm(),i->extend8bitL());
  63   BX_WRITE_8BIT_REGx(i->nnn(), i->extend8bitL(), op2);
  64 }
  65
  66 void BX_CPU_C::MOV_ALOd(bxInstruction_c *i)
  67 {
  68   read_virtual_byte(i->seg(), i->Id(), &AL);
  69 }
  70
  71 void BX_CPU_C::MOV_OdAL(bxInstruction_c *i)
  72 {
  73   write_virtual_byte(i->seg(), i->Id(), &AL);
  74 }
  75
  76 void BX_CPU_C::MOV_EbIb(bxInstruction_c *i)
  77 {
  78   Bit8u op2 = i->Ib();
  79
  80   if (i->modC0()) {
  81     BX_WRITE_8BIT_REGx(i->rm(), i->extend8bitL(), op2);
  82   }
  83   else {
  84     write_virtual_byte(i->seg(), RMAddr(i), &op2);
  85   }
  86 }
  87
  88 void BX_CPU_C::XLAT(bxInstruction_c *i)
  89 {
  90   bx_address offset;
  91
  92 #if BX_SUPPORT_X86_64
  93   if (i->as64L()) {
  94     offset = RBX + AL;
  95   }
  96   else
  97 #endif
  98   if (i->as32L()) {
  99     offset = EBX + AL;
 100   }
 101   else {
 102     offset =  BX + AL;
 103   }
 104
 105   read_virtual_byte(i->seg(), offset, &AL);
 106 }
 107
 108 void BX_CPU_C::XCHG_EbGb(bxInstruction_c *i)
 109 {
 110   Bit8u op2, op1;
 111
 112   op2 = BX_READ_8BIT_REGx(i->nnn(), i->extend8bitL());
 113
 114   /* op1 is a register or memory reference */
 115   if (i->modC0()) {
 116     op1 = BX_READ_8BIT_REGx(i->rm(), i->extend8bitL());
 117     BX_WRITE_8BIT_REGx(i->rm(), i->extend8bitL(), op2);
 118   }
 119   else {
 120     /* pointer, segment address pair */
 121     read_RMW_virtual_byte(i->seg(), RMAddr(i), &op1);
 122     write_RMW_virtual_byte(op2);
 123   }
 124
 125   BX_WRITE_8BIT_REGx(i->nnn(), i->extend8bitL(), op1);
 126 }