- move isinf, isnan dups to gen, since most is ieee 754

- is{inf,nan} should be macros for real-floating, so rename to
__is{inf,nan}, per C99
- implement C99 __fpclassify(), __fpclassifyf(), __isfinite(),
__isfinitef(), __isnormal(), __isnormalf(), __signbit(), __signbitf()
- long functions added, but not yet enabled, till ieee.h is fixed
- implement vax equivalents of the functions
- reimplement isinff, isnanf in a better way, and move to libc
- add qnan bytes for all archs
- bump major
man pages will follow
ok millert@.  arm bits looked over by drahn@
discussed w/ theo, who showed the right direction, to put these
functions in libc

1 files changed, 49 insertions, 0 deletions

diff --git a/lib/libc/gen/isinf.c b/lib/libc/gen/isinf.c
new file mode 100644
index 00000000000..f8dae2a5402
--- /dev/null
+++ b/lib/libc/gen/isinf.c
@@ -0,0 +1,49 @@
+/*	$OpenBSD: isinf.c,v 1.1 2008/07/24 09:31:07 martynas Exp $	*/
+/*
+ * Copyright (c) 2008 Martynas Venckus <martynas@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+#include <machine/ieee.h>
+
+int
+__isinf(double d)
+{
+	struct ieee_double *p = (struct ieee_double *)&d;
+
+	return (p->dbl_exp == DBL_EXP_INFNAN &&
+	    p->dbl_frach == 0 && p->dbl_fracl == 0);
+}
+
+int
+isinff(float f)
+{
+	struct ieee_single *p = (struct ieee_single *)&f;
+ 
+	return (p->sng_exp == SNG_EXP_INFNAN && p->sng_frac == 0);
+}
+
+#if 0	/* XXX */
+int
+__isinfl(long double e)
+{
+	struct ieee_ext *p = (struct ieee_ext *)&e;
+
+	p->ext_frach &= ~0x80000000;	/* clear sign bit */
+
+	return (p->ext_exp == EXT_EXP_INFNAN &&
+	    p->ext_frach == 0 && p->ext_fracl == 0);
+}
+#endif	/* XXX */