1 files changed, 78 insertions, 0 deletions
diff --git a/newlib/libm/common/sf_round.c b/newlib/libm/common/sf_round.c
new file mode 100644
index 000000000..75a72fe75
--- /dev/null
+++ b/newlib/libm/common/sf_round.c
@@ -0,0 +1,78 @@
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice 
+ * is preserved.
+ * ====================================================
+ */
+
+#include "fdlibm.h"
+
+#ifdef __STDC__
+	float roundf(float x)
+#else
+	float roundf(x)
+	float x;
+#endif
+{
+  int signbit;
+  int w;
+  /* Most significant word, least significant word. */
+  int exponent_less_127;
+
+  GET_FLOAT_WORD(w, x);
+
+  /* Extract sign bit. */
+  signbit = w & 0x80000000;
+
+  /* Extract exponent field. */
+  exponent_less_127 = ((w & 0x7f800000) >> 23) - 127;
+
+  if (exponent_less_127 < 23)
+    {
+      if (exponent_less_127 < 0)
+        {
+          w &= 0x80000000;
+          if (exponent_less_127 == -1)
+            /* Result is +1.0 or -1.0. */
+            w |= (127 << 23);
+        }
+      else
+        {
+          unsigned int exponent_mask = 0x007fffff >> exponent_less_127;
+          if ((w & exponent_mask) == 0)
+            /* x has an integral value. */
+            return x;
+
+          w += 0x00400000 >> exponent_less_127;
+          w &= ~exponent_mask;
+        }
+    }
+  else
+    {
+      if (exponent_less_127 == 128)
+        /* x is NaN or infinite. */
+        return x + x;
+      else
+        return x;
+    }
+  SET_FLOAT_WORD(x, w);
+  return x;
+}
+
+#ifdef _DOUBLE_IS_32BITS
+
+#ifdef __STDC__
+	double round(double x)
+#else
+	double round(x)
+	double x;
+#endif
+{
+	return (double) roundf((float) x);
+}
+
+#endif /* defined(_DOUBLE_IS_32BITS) */