1 files changed, 43 insertions, 0 deletions
diff --git a/winsup/cygwin/math/nexttowardf.c b/winsup/cygwin/math/nexttowardf.c
new file mode 100644
index 000000000..0a2f3bfb7
--- /dev/null
+++ b/winsup/cygwin/math/nexttowardf.c
@@ -0,0 +1,43 @@
+/**
+ * This file has no copyright assigned and is placed in the Public Domain.
+ * This file is part of the mingw-w64 runtime package.
+ * No warranty is given; refer to the file DISCLAIMER.PD within this package.
+ */
+/*
+   nexttowardf.c
+   Contributed by Danny Smith <dannysmith@users.sourceforge.net>
+   No copyright claimed, absolutely no warranties.
+
+   2005-05-10
+*/
+
+#include <math.h>
+
+float
+nexttowardf (float x, long double y)
+{
+  union
+  {
+    float f;
+    unsigned int i;
+  } u;
+
+  long double xx = x;
+
+  if (isnan (y) || isnan (x))
+    return x + y;
+  if (xx == y )
+     /* nextafter (0.0, -O.0) should return -0.0.  */
+     return y;
+  u.f = x; 
+  if (x == 0.0F)
+    {
+      u.i = 1;
+      return y > 0.0L ? u.f : -u.f;
+    }
+  if (((x > 0.0F) ^ (y > xx)) == 0)
+    u.i++;
+  else
+    u.i--;
+  return u.f;
+}