1 files changed, 27 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/torture/float128-truncsf-underflow.c b/gcc-4.9/gcc/testsuite/gcc.dg/torture/float128-truncsf-underflow.c
new file mode 100644
index 000000000..3f1a71366
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.dg/torture/float128-truncsf-underflow.c
@@ -0,0 +1,27 @@
+/* Test truncation from __float128 to float uses after-rounding
+   tininess detection.  */
+
+/* { dg-do run { target i?86-*-* x86_64-*-* ia64-*-* } } */
+/* { dg-options "" } */
+/* { dg-require-effective-target fenv_exceptions } */
+
+#include <fenv.h>
+#include <stdlib.h>
+
+int
+main (void)
+{
+  volatile __float128 a = 0x0.ffffffffffp-126q, b = 0x0.ffffffp-126q;
+  volatile float r;
+  r = (float) a;
+  if (fetestexcept (FE_UNDERFLOW))
+    abort ();
+  if (r != 0x1p-126f)
+    abort ();
+  r = (float) b;
+  if (!fetestexcept (FE_UNDERFLOW))
+    abort ();
+  if (r != 0x1p-126f)
+    abort ();
+  exit (0);
+}