1 files changed, 55 insertions, 0 deletions
diff --git a/src/math/ceilf.c b/src/math/ceilf.c
new file mode 100644
index 00000000..d83066a5
--- /dev/null
+++ b/src/math/ceilf.c
@@ -0,0 +1,55 @@
+/* origin: FreeBSD /usr/src/lib/msun/src/s_ceilf.c */
+/*
+ * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
+ */
+/*
+ * ====================================================
+ * 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 "libm.h"
+
+static const float huge = 1.0e30;
+
+float ceilf(float x)
+{
+	int32_t i0,j0;
+	uint32_t i;
+
+	GET_FLOAT_WORD(i0, x);
+	j0 = ((i0>>23)&0xff) - 0x7f;
+	if (j0 < 23) {
+		if (j0 < 0) {
+			/* raise inexact if x != 0 */
+			if (huge+x > (float)0.0) {
+				/* return 0*sign(x) if |x|<1 */
+				if (i0 < 0)
+					i0 = 0x80000000;
+				else if(i0 != 0)
+					i0 = 0x3f800000;
+			}
+		} else {
+			i = 0x007fffff>>j0;
+			if ((i0&i) == 0)
+				return x; /* x is integral */
+			/* raise inexact flag */
+			if (huge+x > (float)0.0) {
+				if (i0 > 0)
+					i0 += 0x00800000>>j0;
+				i0 &= ~i;
+			}
+		}
+	} else {
+		if (j0 == 0x80)  /* inf or NaN */
+			return x+x;
+		return x; /* x is integral */
+	}
+	SET_FLOAT_WORD(x, i0);
+	return x;
+}