Fix ldbl-128 j0l, j1l, y0l, y1l for sNaN argument (bug 20151).

The ldbl-128 implementations of j0l, j1l, y0l, y1l (also used for
ldbl-128ibm) return an sNaN argument unchanged.  This patch fixes them
to add a NaN argument to itself to quiet it before return.

Tested for mips64.

	[BZ #20151]
	* sysdeps/ieee754/ldbl-128/e_j0l.c (__ieee754_j0l): Add NaN
	argument to itself before returning result.
	(__ieee754_y0l): Likewise.
	* sysdeps/ieee754/ldbl-128/e_j1l.c (__ieee754_j1l): Likewise.
	(__ieee754_y1l).

2 files changed, 4 insertions, 4 deletions

diff --git a/sysdeps/ieee754/ldbl-128/e_j0l.c b/sysdeps/ieee754/ldbl-128/e_j0l.c
index c208916a79..ddc82143dc 100644
--- a/sysdeps/ieee754/ldbl-128/e_j0l.c
+++ b/sysdeps/ieee754/ldbl-128/e_j0l.c
@@ -683,7 +683,7 @@ __ieee754_j0l (long double x)
   if (! isfinite (x))
     {
       if (x != x)
-	return x;
+	return x + x;
       else
 	return 0.0L;
     }
@@ -831,7 +831,7 @@ long double
   if (! isfinite (x))
     {
       if (x != x)
-	return x;
+	return x + x;
       else
 	return 0.0L;
     }
diff --git a/sysdeps/ieee754/ldbl-128/e_j1l.c b/sysdeps/ieee754/ldbl-128/e_j1l.c
index f5b04c073d..32652049ab 100644
--- a/sysdeps/ieee754/ldbl-128/e_j1l.c
+++ b/sysdeps/ieee754/ldbl-128/e_j1l.c
@@ -690,7 +690,7 @@ __ieee754_j1l (long double x)
   if (! isfinite (x))
     {
       if (x != x)
-	return x;
+	return x + x;
       else
 	return 0.0L;
     }
@@ -849,7 +849,7 @@ __ieee754_y1l (long double x)
   if (! isfinite (x))
     {
       if (x != x)
-	return x;
+	return x + x;
       else
 	return 0.0L;
     }