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Operating System | How to handle floating point errors | |||
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Linux | Use the C99 floating point exception functions. | |||
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="31f3bbd9c9e0420c-609cf07b-48484ad5-aa67bfcc-e8748b1cce025d40594f66a4"><ac:plain-text-body><![CDATA[ | Windows | Either use the C99 floating point exception function or structured exception handling through | AA. C References#MSDN]] | ]]></ac:plain-text-body></ac:structured-macro> |
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#include <fenv.h>
#pragma STDC FENV_ACCESS ON
fpOper_fenv(void) {
double a = 1e-40, b, c = 0.1;
float x = 0, y;
int fpeRaised;
/* ... */
feclearexcept(FE_ALL_EXCEPT);
/* Store a into y is inexact and underflows: */
y = a;
fpeRaised = fetestexcept(FE_ALL_EXCEPT);
/* fpeRaised has FE_INEXACT and FE_UNDERFLOW */
feclearexcept(FE_ALL_EXCEPT);
/* divide by zero operation */
b = y / x;
fpeRaised = fetestexcept(FE_ALL_EXCEPT);
/* fpeRaised has FE_DIVBYZERO */
feclearexcept(FE_ALL_EXCEPT);
c = sin(30) * a;
fpeRaised = fetestexcept(FE_ALL_EXCEPT);
/* fpeRaised has FE_INEXACT */
feclearexcept(FE_ALL_EXCEPT);
/* ... */
}
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