(fpadd_parts): Adding infinities with opposite signs yields a NaN.

From-SVN: r8667

(fpadd_parts): Adding infinities with opposite signs yields a NaN.
From-SVN: r8667
c211b991 · Jim Wilson · 667a4593 · c211b991
Commit c211b991 authored Dec 19, 1994 by Jim Wilson
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gcc/config/fp-bit.c
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--- a/gcc/config/fp-bit.c
+++ b/gcc/config/fp-bit.c
@@ -485,6 +485,9 @@ _fpadd_parts (fp_number_type * a,
    }
  if (isinf (a))
    {
+      /* Adding infinities with opposite signs yields a NaN.  */
+      if (isinf (b) && a->sign != b->sign)
+	return nan ();
      return a;
    }
  if (isinf (b))