From: rahnds <rahnds@openbsd.org>
Date: Fri, 17 Jan 1997 21:39:20 +0000 (+0000)
Subject: frexp version from m68k, both are IEEE so should be fine.
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=e22709cac6bb9ffaae25a49da4270a39a03d7bd1;p=openbsd

frexp version from m68k, both are IEEE so should be fine.

Ok what other routines are missing at this point I wonder,
Do we have a standards compilance test? If so, it really needs to
be run on this port.
---

diff --git a/lib/libc/arch/powerpc/gen/Makefile.inc b/lib/libc/arch/powerpc/gen/Makefile.inc
index 677172e4494..42c368e74ca 100644
--- a/lib/libc/arch/powerpc/gen/Makefile.inc
+++ b/lib/libc/arch/powerpc/gen/Makefile.inc
@@ -1,3 +1,3 @@
 SRCS+= isinf.c infinity.c setjmp.S sigsetjmp.S flt_rounds.c modf.c
-SRCS+= ldexp.c fabs.c
+SRCS+= ldexp.c fabs.c frexp.c
 SRCS+= fp.c
diff --git a/lib/libc/arch/powerpc/gen/frexp.c b/lib/libc/arch/powerpc/gen/frexp.c
new file mode 100644
index 00000000000..213524cdd68
--- /dev/null
+++ b/lib/libc/arch/powerpc/gen/frexp.c
@@ -0,0 +1,65 @@
+/*-
+ * Copyright (c) 1991 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char rcsid[] = "$OpenBSD: frexp.c,v 1.1 1997/01/17 21:39:20 rahnds Exp $";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <math.h>
+
+double
+frexp(value, eptr)
+	double value;
+	int *eptr;
+{
+	union {
+                double v;
+                struct {
+                        u_int  u_sign :  1;
+			u_int   u_exp : 11;
+			u_int u_mant1 : 20;
+			u_int u_mant2 : 32;
+                } s;
+        } u;
+
+	if (value) {
+		u.v = value;
+		*eptr = u.s.u_exp - 1022;
+		u.s.u_exp = 1022;
+		return(u.v);
+	} else {
+		*eptr = 0;
+		return((double)0);
+	}
+}