glibc/math/bug-nextafter.c

64 lines
1.2 KiB
C

#include <fenv.h>
#include <math.h>
#include <float.h>
#include <stdlib.h>
#include <stdio.h>
int
main (void)
{
int result = 0;
float i = INFINITY;
float m = FLT_MAX;
feclearexcept (FE_ALL_EXCEPT);
if (nextafterf (m, i) != i)
{
puts ("nextafterf+ failed");
++result;
}
if (fetestexcept (FE_OVERFLOW) == 0)
{
puts ("nextafterf+ did not overflow");
++result;
}
feclearexcept (FE_ALL_EXCEPT);
if (nextafterf (-m, -i) != -i)
{
puts ("nextafterf- failed");
++result;
}
if (fetestexcept (FE_OVERFLOW) == 0)
{
puts ("nextafterf- did not overflow");
++result;
}
double di = INFINITY;
double dm = DBL_MAX;
feclearexcept (FE_ALL_EXCEPT);
if (nextafter (dm, di) != di)
{
puts ("nextafter+ failed");
++result;
}
if (fetestexcept (FE_OVERFLOW) == 0)
{
puts ("nextafter+ did not overflow");
++result;
}
feclearexcept (FE_ALL_EXCEPT);
if (nextafter (-dm, -di) != -di)
{
puts ("nextafter failed");
++result;
}
if (fetestexcept (FE_OVERFLOW) == 0)
{
puts ("nextafter- did not overflow");
++result;
}
return result;
}