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x87 fix

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This commit is contained in:
Stanislav Shwartsman 2009-06-01 10:39:34 +00:00
parent e60cb68d87
commit 1af50411b6
1 changed files with 10 additions and 8 deletions
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18
bochs/fpu/ferr.cc
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: ferr.cc,v 1.17 2009-05-24 15:29:43 sshwarts Exp $
// $Id: ferr.cc,v 1.18 2009-06-01 10:39:34 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2003 Stanislav Shwartsman
@ -62,6 +62,9 @@ unsigned BX_CPU_C::FPU_exception(unsigned exception, bx_bool is_store)
Bit32u status = FPU_PARTIAL_STATUS;
unsigned unmasked = exception & ~FPU_CONTROL_WORD & FPU_CW_Exceptions_Mask;
// if IE or DZ exception happen nothing else will be reported
if (exception & (FPU_EX_Invalid | FPU_EX_Zero_Div))
unmasked &= (FPU_EX_Invalid | FPU_EX_Zero_Div);
/* Set summary bits iff exception isn't masked */
if (unmasked)
@ -80,16 +83,15 @@ unsigned BX_CPU_C::FPU_exception(unsigned exception, bx_bool is_store)
return unmasked;
}
if (exception & FPU_EX_Zero_Div) {
FPU_PARTIAL_STATUS |= FPU_EX_Zero_Div;
return unmasked;
}
if (exception & FPU_EX_Denormal) {
FPU_PARTIAL_STATUS |= FPU_EX_Denormal;
if (unmasked & FPU_EX_Denormal)
return unmasked;
}
if (exception & FPU_EX_Zero_Div) {
FPU_PARTIAL_STATUS |= FPU_EX_Zero_Div;
if (unmasked & FPU_EX_Zero_Div)
return unmasked;
return unmasked & FPU_EX_Denormal;
}
/* Set the corresponding exception bits */