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Fixed 64-bit NOP problem

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Patch by mvysin in patch tyracker
This commit is contained in:
Stanislav Shwartsman 2006-11-26 12:53:01 +00:00
parent 4314b6a911
commit 6e8dcbce8b
1 changed files with 6 additions and 1 deletions
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7
bochs/cpu/data_xfer32.cc
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: data_xfer32.cc,v 1.39 2006-06-26 20:28:00 sshwarts Exp $
// $Id: data_xfer32.cc,v 1.40 2006-11-26 12:53:01 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2001 MandrakeSoft S.A.
@ -37,6 +37,11 @@
void BX_CPU_C::XCHG_ERXEAX(bxInstruction_c *i)
{
#if BX_SUPPORT_X86_64
if (i->opcodeReg() == 0) // 'xchg eax, eax' is NOP even in 64-bit mode
return;
#endif
Bit32u temp32 = EAX;
RAX = BX_READ_32BIT_REG(i->opcodeReg());
BX_WRITE_32BIT_REGZ(i->opcodeReg(), temp32);