glibc/math/bug-nexttoward.c

66 lines
1.3 KiB
C

#include <fenv.h>
#include <math.h>
#include <float.h>
#include <stdlib.h>
#include <stdio.h>
int
main (void)
{
int result = 0;
long double tl = (long double) FLT_MAX + 0x1.0p128L;
float fi = INFINITY;
float m = FLT_MAX;
feclearexcept (FE_ALL_EXCEPT);
if (nexttowardf (m, tl) != fi)
{
puts ("nexttowardf+ failed");
++result;
}
if (fetestexcept (FE_OVERFLOW) == 0)
{
puts ("nexttowardf+ did not overflow");
++result;
}
feclearexcept (FE_ALL_EXCEPT);
if (nexttowardf (-m, -tl) != -fi)
{
puts ("nexttowardf- failed");
++result;
}
if (fetestexcept (FE_OVERFLOW) == 0)
{
puts ("nexttowardf- did not overflow");
++result;
}
tl = (long double) DBL_MAX + 1.0e305L;
double di = INFINITY;
double dm = DBL_MAX;
feclearexcept (FE_ALL_EXCEPT);
if (nexttoward (dm, tl) != di)
{
puts ("nexttoward+ failed");
++result;
}
if (fetestexcept (FE_OVERFLOW) == 0)
{
puts ("nexttoward+ did not overflow");
++result;
}
feclearexcept (FE_ALL_EXCEPT);
if (nexttoward (-dm, -tl) != -di)
{
puts ("nexttoward- failed");
++result;
}
if (fetestexcept (FE_OVERFLOW) == 0)
{
puts ("nexttoward- did not overflow");
++result;
}
return result;
}