summaryrefslogtreecommitdiff
path: root/libm/s_ceilf.c
diff options
context:
space:
mode:
authorEric Andersen <andersen@codepoet.org>2003-06-27 05:50:09 +0000
committerEric Andersen <andersen@codepoet.org>2003-06-27 05:50:09 +0000
commitf63dad74e85e5b00db30c8466da2c474f3f51b2e (patch)
tree82a87db1917c31b9c3c50857cab9b5fb84028812 /libm/s_ceilf.c
parent5499a848e90609e4d5962c43db0d2d08c6f71809 (diff)
Add in ceilf() and floorf() since XFree86 wants them...
Diffstat (limited to 'libm/s_ceilf.c')
-rw-r--r--libm/s_ceilf.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/libm/s_ceilf.c b/libm/s_ceilf.c
new file mode 100644
index 000000000..29ccadb04
--- /dev/null
+++ b/libm/s_ceilf.c
@@ -0,0 +1,62 @@
+/* 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.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: s_ceilf.c,v 1.4 1995/05/10 20:46:55 jtc Exp $";
+#endif
+
+#include "math.h"
+#include "math_private.h"
+
+#ifdef __STDC__
+static const float huge = 1.0e30;
+#else
+static float huge = 1.0e30;
+#endif
+
+#ifdef __STDC__
+ float __ceilf(float x)
+#else
+ float __ceilf(x)
+ float x;
+#endif
+{
+ 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;
+}
+weak_alias (__ceilf, ceilf)