Module Name: src
Committed By: christos
Date: Mon Feb 11 01:38:10 UTC 2013
Added Files:
src/lib/libm/src: s_frexpl.c s_scalbln.c
Log Message:
more stuff from FreeBSD
To generate a diff of this commit:
cvs rdiff -u -r0 -r1.1 src/lib/libm/src/s_frexpl.c \
src/lib/libm/src/s_scalbln.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Added files:
Index: src/lib/libm/src/s_frexpl.c
diff -u /dev/null src/lib/libm/src/s_frexpl.c:1.1
--- /dev/null Sun Feb 10 20:38:10 2013
+++ src/lib/libm/src/s_frexpl.c Sun Feb 10 20:38:10 2013
@@ -0,0 +1,62 @@
+/*-
+ * Copyright (c) 2004-2005 David Schultz <d...@freebsd.org>
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ *
+ * $FreeBSD: src/lib/msun/src/s_frexpl.c,v 1.1 2005/03/07 04:54:51 das Exp $
+ */
+
+#include <float.h>
+#include <math.h>
+
+#include "fpmath.h"
+
+#if LDBL_MAX_EXP != 0x4000
+#error "Unsupported long double format"
+#endif
+
+long double
+frexpl(long double x, int *ex)
+{
+ union IEEEl2bits u;
+
+ u.e = x;
+ switch (u.bits.exp) {
+ case 0: /* 0 or subnormal */
+ if ((u.bits.manl | u.bits.manh) == 0) {
+ *ex = 0;
+ } else {
+ u.e *= 0x1.0p514;
+ *ex = u.bits.exp - 0x4200;
+ u.bits.exp = 0x3ffe;
+ }
+ break;
+ case 0x7fff: /* infinity or NaN; value of *ex is unspecified */
+ break;
+ default: /* normal */
+ *ex = u.bits.exp - 0x3ffe;
+ u.bits.exp = 0x3ffe;
+ break;
+ }
+ return (u.e);
+}
Index: src/lib/libm/src/s_scalbln.c
diff -u /dev/null src/lib/libm/src/s_scalbln.c:1.1
--- /dev/null Sun Feb 10 20:38:10 2013
+++ src/lib/libm/src/s_scalbln.c Sun Feb 10 20:38:10 2013
@@ -0,0 +1,76 @@
+/*-
+ * Copyright (c) 2004 David Schultz <d...@freebsd.org>
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/lib/msun/src/s_scalbln.c,v 1.2 2005/03/07 04:57:50 das Exp $");
+
+#include <limits.h>
+#include <math.h>
+
+double
+scalbln (double x, long n)
+{
+ int in;
+
+ in = (int)n;
+ if (in != n) {
+ if (n > 0)
+ in = INT_MAX;
+ else
+ in = INT_MIN;
+ }
+ return (scalbn(x, in));
+}
+
+float
+scalblnf (float x, long n)
+{
+ int in;
+
+ in = (int)n;
+ if (in != n) {
+ if (n > 0)
+ in = INT_MAX;
+ else
+ in = INT_MIN;
+ }
+ return (scalbnf(x, in));
+}
+
+long double
+scalblnl (long double x, long n)
+{
+ int in;
+
+ in = (int)n;
+ if (in != n) {
+ if (n > 0)
+ in = INT_MAX;
+ else
+ in = INT_MIN;
+ }
+ return (scalbnl(x, (int)n));
+}
