fly/flightgear
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Enable floating-point exceptions for Linux/x86 systems. See the

Browse source 
beginning of main() for the exceptions that can be enabled (only
divide-by-zero is enabled by default, but you can uncomment any ones
you want); eventually, FlightGear should run cleanly with all FPEs
enabled.
This commit is contained in:
david 2001-12-22 19:10:37 +00:00
parent f5c9008823
commit c24f4a0539
1 changed files with 19 additions and 42 deletions

61
src/Main/main.cxx
View file

@ -25,6 +25,10 @@
# include <config.h>
#endif
#if defined(__linux__) && defined(__386__)
# include <fpu_control.h>
#endif
#include <simgear/compiler.h>
#include <simgear/misc/exception.hxx>
@ -974,48 +978,8 @@ void fgUpdateTimeDepCalcs() {
}
// update the view angle
FGViewer *v = globals->get_current_view();
for ( i = 0; i < multi_loop; i++ ) {
if ( fabs(v->get_goal_view_offset() - v->get_view_offset()) < 0.05 ) {
v->set_view_offset( v->get_goal_view_offset() );
break;
} else {
// move current_view.view_offset towards
// current_view.goal_view_offset
if ( v->get_goal_view_offset() > v->get_view_offset() )
{
if ( v->get_goal_view_offset() - v->get_view_offset() < SGD_PI ){
v->inc_view_offset( 0.01 );
} else {
v->inc_view_offset( -0.01 );
}
} else {
if ( v->get_view_offset() - v->get_goal_view_offset() < SGD_PI ){
v->inc_view_offset( -0.01 );
} else {
v->inc_view_offset( 0.01 );
}
}
if ( v->get_view_offset() > SGD_2PI ) {
v->inc_view_offset( -SGD_2PI );
} else if ( v->get_view_offset() < 0 ) {
v->inc_view_offset( SGD_2PI );
}
}
}
globals->get_current_view()->update(multi_loop);
double tmp = -(l->sun_rotation + SGD_PI)
- (cur_fdm_state->get_Psi() -
globals->get_current_view()->get_view_offset() );
while ( tmp < 0.0 ) {
tmp += SGD_2PI;
}
while ( tmp > SGD_2PI ) {
tmp -= SGD_2PI;
}
/* printf("Psi = %.2f, viewoffset = %.2f sunrot = %.2f rottosun = %.2f\n",
FG_Psi * SGD_RADIANS_TO_DEGREES, current_view.view_offset * SGD_RADIANS_TO_DEGREES,
-(l->sun_rotation+SGD_PI) * SGD_RADIANS_TO_DEGREES, tmp * SGD_RADIANS_TO_DEGREES); */
l->UpdateAdjFog();
// Update solar system
@ -1024,7 +988,7 @@ void fgUpdateTimeDepCalcs() {
cur_fdm_state->get_Latitude() );
// Update radio stack model
current_radiostack->update(1); // FIXME: use dt
current_radiostack->update(multi_loop);
}
@ -1809,6 +1773,19 @@ int mainLoop( int argc, char **argv ) {
// Main entry point; catch any exceptions that have made it this far.
int main ( int argc, char **argv ) {
// Enable floating-point exceptions for Linux/x86
#if defined(__linux__) && defined(__386__)
int fpe_flags = 0;
// fpe_flags |= _FPU_MASK_IM; // invalid operation
// fpe_flags |= _FPU_MASK_DM; // denormalized operand
fpe_flags |= _FPU_MASK_ZM; // zero-divide
// fpe_flags |= _FPU_MASK_OM; // overflow
// fpe_flags |= _FPU_MASK_UM; // underflow
// fpe_flags |= _FPU_MASK_PM; // precision (inexact result)
_FPU_SETCW(fpe_flags);
#endif
// Enable floating-point exceptions for Windows
#if defined( _MSC_VER ) && defined( DEBUG )
// Christian, we should document what this does
_control87( _EM_INEXACT, _MCW_EM );