.

1 files changed, 255 insertions, 0 deletions

diff --git a/math/bug-nextafter.c b/math/bug-nextafter.c
index 2a967c75bf..1d21841ea6 100644
--- a/math/bug-nextafter.c
+++ b/math/bug-nextafter.c
@@ -4,6 +4,9 @@
 #include <stdlib.h>
 #include <stdio.h>
 
+float zero = 0.0;
+float inf = INFINITY;
+
 int
 main (void)
 {
@@ -34,6 +37,81 @@ main (void)
       ++result;
     }
 
+  i = 0;
+  m = FLT_MIN;
+  feclearexcept (FE_ALL_EXCEPT);
+  i = nextafterf (m, i);
+  if (i < 0 || i >= FLT_MIN)
+    {
+      puts ("nextafterf+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterf+ did not underflow");
+      ++result;
+    }
+  i = 0;
+  feclearexcept (FE_ALL_EXCEPT);
+  i = nextafterf (-m, -i);
+  if (i > 0 || i <= -FLT_MIN)
+    {
+      puts ("nextafterf- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterf- did not underflow");
+      ++result;
+    }
+  i = -INFINITY;
+  feclearexcept (FE_ALL_EXCEPT);
+  m = nextafterf (zero, inf);
+  if (m < 0.0 || m >= FLT_MIN)
+    {
+      puts ("nextafterf+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterf+ did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nextafterf (m, i) != 0.0)
+    {
+      puts ("nextafterf+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterf+ did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  m = nextafterf (copysignf (zero, -1.0), -inf);
+  if (m > 0.0 || m <= -FLT_MIN)
+    {
+      puts ("nextafterf- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterf- did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nextafterf (m, -i) != 0.0)
+    {
+      puts ("nextafterf- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterf- did not underflow");
+      ++result;
+    }
+
   double di = INFINITY;
   double dm = DBL_MAX;
   feclearexcept (FE_ALL_EXCEPT);
@@ -59,5 +137,182 @@ main (void)
       ++result;
     }
 
+  di = 0;
+  dm = DBL_MIN;
+  feclearexcept (FE_ALL_EXCEPT);
+  di = nextafter (dm, di);
+  if (di < 0 || di >= DBL_MIN)
+    {
+      puts ("nextafter+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafter+ did not underflow");
+      ++result;
+    }
+  di = 0;
+  feclearexcept (FE_ALL_EXCEPT);
+  di = nextafter (-dm, -di);
+  if (di > 0 || di <= -DBL_MIN)
+    {
+      puts ("nextafter- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafter- did not underflow");
+      ++result;
+    }
+  di = -INFINITY;
+  feclearexcept (FE_ALL_EXCEPT);
+  dm = nextafter (zero, inf);
+  if (dm < 0.0 || dm >= DBL_MIN)
+    {
+      puts ("nextafter+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafter+ did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nextafter (dm, di) != 0.0)
+    {
+      puts ("nextafter+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafter+ did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  dm = nextafter (copysign (zero, -1.0), -inf);
+  if (dm > 0.0 || dm <= -DBL_MIN)
+    {
+      puts ("nextafter- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafter- did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nextafter (dm, -di) != 0.0)
+    {
+      puts ("nextafter- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafter- did not underflow");
+      ++result;
+    }
+
+#ifndef NO_LONG_DOUBLE
+  long double li = INFINITY;
+  long double lm = LDBL_MAX;
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nextafterl (lm, li) != li)
+    {
+      puts ("nextafterl+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_OVERFLOW) == 0)
+    {
+      puts ("nextafterl+ did not overflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nextafterl (-lm, -li) != -li)
+    {
+      puts ("nextafterl failed");
+      ++result;
+    }
+  if (fetestexcept (FE_OVERFLOW) == 0)
+    {
+      puts ("nextafterl- did not overflow");
+      ++result;
+    }
+
+  li = 0;
+  lm = LDBL_MIN;
+  feclearexcept (FE_ALL_EXCEPT);
+  li = nextafterl (lm, li);
+  if (li < 0 || li >= LDBL_MIN)
+    {
+      puts ("nextafterl+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterl+ did not underflow");
+      ++result;
+    }
+  li = 0;
+  feclearexcept (FE_ALL_EXCEPT);
+  li = nextafterl (-lm, -li);
+  if (li > 0 || li <= -LDBL_MIN)
+    {
+      puts ("nextafterl- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterl- did not underflow");
+      ++result;
+    }
+  li = -INFINITY;
+  feclearexcept (FE_ALL_EXCEPT);
+  lm = nextafterl (zero, inf);
+  if (lm < 0.0 || lm >= LDBL_MIN)
+    {
+      puts ("nextafterl+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterl+ did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nextafterl (lm, li) != 0.0)
+    {
+      puts ("nextafterl+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterl+ did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  lm = nextafterl (copysign (zero, -1.0), -inf);
+  if (lm > 0.0 || lm <= -LDBL_MIN)
+    {
+      puts ("nextafterl- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterl- did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nextafterl (lm, -li) != 0.0)
+    {
+      puts ("nextafterl- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterl- did not underflow");
+      ++result;
+    }
+#endif
+
   return result;
 }