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-rw-r--r--math/bug-nexttoward.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/math/bug-nexttoward.c b/math/bug-nexttoward.c
new file mode 100644
index 0000000000..e306a129c2
--- /dev/null
+++ b/math/bug-nexttoward.c
@@ -0,0 +1,65 @@
+#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;
+}