auto import from //depot/cupcake/@135843

1 files changed, 53 insertions, 0 deletions

diff --git a/libm/src/s_ceilf.c b/libm/src/s_ceilf.c
new file mode 100644
index 0000000..5c465b3
--- /dev/null
+++ b/libm/src/s_ceilf.c
@@ -0,0 +1,53 @@
+/* s_ceilf.c -- float version of s_ceil.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.
+ * ====================================================
+ */
+
+#ifndef lint
+static char rcsid[] = "$FreeBSD: src/lib/msun/src/s_ceilf.c,v 1.7 2002/05/28 18:15:04 alfred Exp $";
+#endif
+
+#include "math.h"
+#include "math_private.h"
+
+static const float huge = 1.0e30;
+
+float
+ceilf(float x)
+{
+	int32_t i0,j0;
+	u_int32_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 */
+		if(huge+x>(float)0.0) {	/* raise inexact flag */
+		    if(i0>0) i0 += (0x00800000)>>j0;
+		    i0 &= (~i);
+		}
+	    }
+	} else {
+	    if(j0==0x80) return x+x;	/* inf or NaN */
+	    else return x;		/* x is integral */
+	}
+	SET_FLOAT_WORD(x,i0);
+	return x;
+}