1 files changed, 89 insertions, 0 deletions
diff --git a/sysdeps/libm-ieee754/s_ceill.c b/sysdeps/libm-ieee754/s_ceill.c
new file mode 100644
index 0000000..c5c8648
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_ceill.c
@@ -0,0 +1,89 @@
+/* s_ceill.c -- long double version of s_ceil.c.
+ * Conversion to long double by Ulrich Drepper,
+ * Cygnus Support, drepper@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.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: $";
+#endif
+
+/*
+ * ceill(x)
+ * Return x rounded toward -inf to integral value
+ * Method:
+ *	Bit twiddling.
+ * Exception:
+ *	Inexact flag raised if x not equal to ceil(x).
+ */
+
+#include "math.h"
+#include "math_private.h"
+
+#ifdef __STDC__
+static const long double huge = 1.0e4930;
+#else
+static long double huge = 1.0e4930;
+#endif
+
+#ifdef __STDC__
+	long double __ceill(long double x)
+#else
+	long double __ceill(x)
+	long double x;
+#endif
+{
+	int32_t i1,j0;
+	u_int32_t i,j,se,i0,sx;
+	GET_LDOUBLE_WORDS(se,i0,i1,x);
+	sx = (se>>15)&1;
+	j0 = (se&0x7fff)-0x3fff;
+	if(j0<32) {
+	    if(j0<0) { 	/* raise inexact if x != 0 */
+		if(huge+x>0.0) {/* return 0*sign(x) if |x|<1 */
+		    if(sx) {es=0x8000;i0=0;i1=0;}
+		    else if((i0|i1)!=0) { es=0x3fff;i0=0;i1=0;}
+		}
+	    } else {
+		i = (0xffffffff)>>j0;
+		if(((i0&i)|i1)==0) return x; /* x is integral */
+		if(huge+x>0.0) {	/* raise inexact flag */
+		    if(sx==0) {
+			if (j0>0) i0 += (0x80000000)>>(j0-1);
+			else ++se;
+		    }
+		    i0 &= (~i); i1=0;
+		}
+	    }
+	} else if (j0>63) {
+	    if(j0==0x4000) return x+x;	/* inf or NaN */
+	    else return x;		/* x is integral */
+	} else {
+	    i = ((u_int32_t)(0xffffffff))>>(j0-32);
+	    if((i1&i)==0) return x;	/* x is integral */
+	    if(huge+x>0.0) { 		/* raise inexact flag */
+		if(sx==0) {
+		    if(j0==32) i0+=1;
+		    else {
+			j = i1 + (1<<(64-j0));
+			if(j<i1) i0+=1;	/* got a carry */
+			i1 = j;
+		    }
+		}
+		i1 &= (~i);
+	    }
+	}
+	SET_LDOUBLE_WORDS(x,se,i0,i1);
+	return x;
+}
+weak_alias (__ceill, ceill)