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x87 fix in 64 bit mode

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This commit is contained in:
Stanislav Shwartsman 2010-11-11 15:48:56 +00:00
parent 4aef7661aa
commit 9e6bf42527
2 changed files with 10 additions and 4 deletions
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10
bochs/fpu/fpu.cc
View File

@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: fpu.cc,v 1.64 2010-10-18 22:19:45 sshwarts Exp $
// $Id: fpu.cc,v 1.65 2010-11-11 15:48:56 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2003-2009 Stanislav Shwartsman
@ -51,6 +51,12 @@ void BX_CPU_C::FPU_update_last_instruction(bxInstruction_c *i)
BX_CPU_THIS_PTR the_i387.fds = BX_CPU_THIS_PTR sregs[i->seg()].selector.value;
BX_CPU_THIS_PTR the_i387.fdp = RMAddr(i);
}
#if BX_SUPPORT_X86_64
else {
// it is possible that rm() register was extended by REX prefix
i->setRm(i->rm() & 7);
}
#endif
}
void BX_CPU_C::FPU_check_pending_exceptions(void)
@ -69,7 +75,7 @@ void BX_CPU_C::FPU_check_pending_exceptions(void)
#endif
{
// MSDOS compatibility external interrupt (IRQ13)
BX_INFO (("math_abort: MSDOS compatibility FPU exception"));
BX_INFO(("math_abort: MSDOS compatibility FPU exception"));
DEV_pic_raise_irq(13);
}
}

4
bochs/fpu/fpu_compare.cc
View File

@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: fpu_compare.cc,v 1.29 2010-02-25 22:04:31 sshwarts Exp $
// $Id: fpu_compare.cc,v 1.30 2010-11-11 15:48:56 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2003-2009 Stanislav Shwartsman
@ -459,7 +459,7 @@ void BX_CPP_AttrRegparmN(1) BX_CPU_C::FCMOV_ST0_STj(bxInstruction_c *i)
floatx80 sti_reg = BX_READ_FPU_REG(i->rm());
bx_bool condition = 0;
switch(i->nnn())
switch(i->nnn() & 3)
{
case 0: condition = get_CF(); break;
case 1: condition = get_ZF(); break;