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Merged patch from #SF site tracker

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This commit is contained in:
Stanislav Shwartsman 2006-09-08 11:26:04 +00:00
parent 5dd0d64b11
commit c7e732fc8c
1 changed files with 14 additions and 13 deletions
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27
bochs/fpu/fpu.cc
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: fpu.cc,v 1.20 2006-03-06 22:03:04 sshwarts Exp $
// $Id: fpu.cc,v 1.21 2006-09-08 11:26:04 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2003 Stanislav Shwartsman
@ -63,20 +63,21 @@ void BX_CPU_C::FPU_check_pending_exceptions(void)
{
if(BX_CPU_THIS_PTR the_i387.get_partial_status() & FPU_SW_Summary)
{
// NE=1 selects the native or internal mode, which generates #MF,
// which is the same as the native version of exception handling
// for the 80286 and 80287 and the i386 processors and i387 math
// coprocessor.
// NE=1 selects the native or internal mode, which generates #MF,
// which is an extension introduced with 80486.
// NE=0 selects the original (backward compatible) FPU error
// handling, which generates an IRQ 13 via the PIC chip.
#if BX_CPU_LEVEL >= 4
if (BX_CPU_THIS_PTR cr0.ne == 0)
{
// MSDOS compatibility external interrupt (IRQ13)
BX_INFO (("math_abort: MSDOS compatibility FPU exception"));
DEV_pic_raise_irq(13);
}
else
if (BX_CPU_THIS_PTR cr0.ne != 0) {
exception(BX_MF_EXCEPTION, 0, 0);
}
else
#endif
exception(BX_MF_EXCEPTION, 0, 0);
{
// MSDOS compatibility external interrupt (IRQ13)
BX_INFO (("math_abort: MSDOS compatibility FPU exception"));
DEV_pic_raise_irq(13);
}
}
}