cpu/fpu_emu.cc

   1 /////////////////////////////////////////////////////////////////////////
   2 // $Id: fpu_emu.cc,v 1.8 2008/04/03 18:13:26 sshwarts Exp $
   3 /////////////////////////////////////////////////////////////////////////
   4 //
   5 //   Copyright (c) 2004 Stanislav Shwartsman
   6 //          Written by Stanislav Shwartsman [sshwarts at sourceforge net]
   7 //
   8 //  This library is free software; you can redistribute it and/or
   9 //  modify it under the terms of the GNU Lesser General Public
  10 //  License as published by the Free Software Foundation; either
  11 //  version 2 of the License, or (at your option) any later version.
  12 //
  13 //  This library is distributed in the hope that it will be useful,
  14 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 //  Lesser General Public License for more details.
  17 //
  18 //  You should have received a copy of the GNU Lesser General Public
  19 //  License along with this library; if not, write to the Free Software
  20 //  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21 /////////////////////////////////////////////////////////////////////////
  22
  23 #define NEED_CPU_REG_SHORTCUTS 1
  24 #include "bochs.h"
  25 #include "cpu.h"
  26 #define LOG_THIS BX_CPU_THIS_PTR
  27
  28 /* 9B */
  29 void BX_CPP_AttrRegparmN(1) BX_CPU_C::FWAIT(bxInstruction_c *i)
  30 {
  31 #if BX_SUPPORT_FPU
  32   if (BX_CPU_THIS_PTR cr0.get_TS() && BX_CPU_THIS_PTR cr0.get_MP())
  33     exception(BX_NM_EXCEPTION, 0, 0);
  34
  35   BX_CPU_THIS_PTR FPU_check_pending_exceptions();
  36 #else
  37   BX_INFO(("FWAIT: requred FPU, use --enable-fpu"));
  38 #endif
  39 }
  40
  41 /* relevant only when FPU support is disabled */
  42 #if BX_SUPPORT_FPU == 0
  43 void BX_CPP_AttrRegparmN(1) BX_CPU_C::FPU_ESC(bxInstruction_c *i)
  44 {
  45   if (BX_CPU_THIS_PTR cr0.get_EM() || BX_CPU_THIS_PTR cr0.get_TS())
  46     exception(BX_NM_EXCEPTION, 0, 0);
  47 }
  48 #endif