Displaying 1 result from an estimated 1 matches for "dosomethingprecise".
2020 Jan 18
2
Combining fast math flags with constrained intrinsics
...front ends and how constructs like pragmas should affect the various states. For example, I might have source code like this:
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double doSomethingVague(double X, double Y, double Z) {
// Some operation that doesn't need to be precise.
if (X/Y > SomeThreshold)
return doSomethingPrecise(X, Y);
else
return Z;
}
#pragma STDC FENV_ACCESS ON
double doSomethingPrecise(double X, double Y) {
int SaveRM = fegetround();
fesetround(FE_DOWNWARD);
feclearexcept(FE_ALL_EXCEPT);
double Temp = X * Y + Z;
if (fetestexcept(FE_ALL_EXCEPT))
std::cerr << "Something hap...