Improve name: "count-one-bits" is better than "popcount".

[gnulib.git] / lib / tanl.c

diff --git a/lib/tanl.c b/lib/tanl.c
index 26bf112..64a84b8 100644 (file)
--- a/lib/tanl.c
+++ b/lib/tanl.c
@@ -55,6 +55,7 @@
 #include "trigl.c"
 #endif
 #endif
+#include "isnanl.h"
 
 /*
  * ====================================================
@@ -126,13 +127,13 @@ kernel_tanl (long double x, long double y, int iy)
   long double z, r, v, w, s, u, u1;
   int flag, sign;
 
-       sign = 1;
-      if (x < 0)
-       {
-         x = -x;
-         y = -y;
-         sign = -1;
-       }
+  sign = 1;
+  if (x < 0)
+    {
+      x = -x;
+      y = -y;
+      sign = -1;
+    }
 
   if (x < 0.000000000000000006938893903907228377647697925567626953125L) /* x < 2**-57 */
     {
@@ -191,13 +192,17 @@ tanl (long double x)
   long double y[2], z = 0.0L;
   int n;
 
+  /* tanl(NaN) is NaN */
+  if (isnanl (x))
+    return x;
+
   /* |x| ~< pi/4 */
   if (x >= -0.7853981633974483096156608458198757210492 &&
       x <= 0.7853981633974483096156608458198757210492)
     return kernel_tanl (x, z, 1);
 
-  /* tanl(Inf or NaN) is NaN, tanl(0) is 0 */
-  else if (x + x == x || x != x)
+  /* tanl(Inf) is NaN, tanl(0) is 0 */
+  else if (x + x == x)
     return x - x;              /* NaN */
 
   /* argument reduction needed */