[src/trunk]: src/lib/libm deal with namespace issues and missing atanhf for vax.

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/833cc51f4709
branches:  trunk
changeset: 347890:833cc51f4709
user:      christos <christos%NetBSD.org@localhost>
date:      Wed Sep 21 14:11:40 2016 +0000

description:
deal with namespace issues and missing atanhf for vax.

diffstat:

 lib/libm/Makefile               |   5 +-
 lib/libm/noieee_src/n_asincos.c |  12 +++++-
 lib/libm/noieee_src/n_atanhf.c  |  84 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 98 insertions(+), 3 deletions(-)

diffs (142 lines):

diff -r 43f7442094ec -r 833cc51f4709 lib/libm/Makefile
--- a/lib/libm/Makefile Wed Sep 21 14:00:29 2016 +0000
+++ b/lib/libm/Makefile Wed Sep 21 14:11:40 2016 +0000
@@ -1,4 +1,4 @@
-#  $NetBSD: Makefile,v 1.185 2016/09/07 14:41:33 jakllsch Exp $
+#  $NetBSD: Makefile,v 1.186 2016/09/21 14:11:40 christos Exp $
 #
 #  @(#)Makefile 5.1beta 93/09/24
 #
@@ -243,7 +243,8 @@
 COPTS.compat_cabsf.c=  ${${ACTIVE_CC} == "gcc":? -fno-builtin-cabsf :}
 
 # math routines for non-IEEE architectures.
-NOIEEE_SRCS = n_asincos.c n_acosh.c n_asinh.c n_atan.c n_atanh.c n_cosh.c \
+NOIEEE_SRCS = n_asincos.c n_acosh.c n_asinh.c n_atan.c n_atanh.c n_atanhf.c \
+       n_cosh.c \
        n_erf.c n_exp.c n_exp2.c n_exp2f.c n_exp__E.c n_expm1.c n_floor.c \
        n_fmod.c n_gamma.c n_ilogb.c \
        n_lgamma.c n_j0.c n_j1.c n_jn.c n_log.c n_log10.c n_log1p.c \
diff -r 43f7442094ec -r 833cc51f4709 lib/libm/noieee_src/n_asincos.c
--- a/lib/libm/noieee_src/n_asincos.c   Wed Sep 21 14:00:29 2016 +0000
+++ b/lib/libm/noieee_src/n_asincos.c   Wed Sep 21 14:11:40 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: n_asincos.c,v 1.8 2013/11/24 14:41:53 martin Exp $     */
+/*     $NetBSD: n_asincos.c,v 1.9 2016/09/21 14:11:40 christos Exp $   */
 /*
  * Copyright (c) 1985, 1993
  *     The Regents of the University of California.  All rights reserved.
@@ -27,6 +27,8 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: n_asincos.c,v 1.9 2016/09/21 14:11:40 christos Exp $");
 
 #ifndef lint
 #if 0
@@ -86,8 +88,16 @@
  *      1.99 ulps.
  */
 
+#include "namespace.h"
 #include "mathimpl.h"
 
+#ifdef __weak_alias
+__weak_alias(asinf, _asinf)
+#endif
+#ifdef __weak_alias
+__weak_alias(asin, _asin)
+#endif
+
 double
 asin(double x)
 {
diff -r 43f7442094ec -r 833cc51f4709 lib/libm/noieee_src/n_atanhf.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libm/noieee_src/n_atanhf.c    Wed Sep 21 14:11:40 2016 +0000
@@ -0,0 +1,84 @@
+/*      $NetBSD: n_atanhf.c,v 1.1 2016/09/21 14:11:40 christos Exp $ */
+/*
+ * Copyright (c) 1985, 1993
+ *     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. 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.
+ */
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: n_atanhf.c,v 1.1 2016/09/21 14:11:40 christos Exp $");
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)atanh.c    8.1 (Berkeley) 6/4/93";
+#endif
+#endif /* not lint */
+
+/* ATANH(X)
+ * RETURN THE HYPERBOLIC ARC TANGENT OF X
+ * DOUBLE PRECISION (VAX D format 56 bits, IEEE DOUBLE 53 BITS)
+ * CODED IN C BY K.C. NG, 1/8/85;
+ * REVISED BY K.C. NG on 2/7/85, 3/7/85, 8/18/85.
+ *
+ * Required kernel function:
+ *     log1p(x)        ...return log(1+x)
+ *
+ * Method :
+ *     Return
+ *                          1              2x                          x
+ *             atanh(x) = --- * log(1 + -------) = 0.5 * log1p(2 * --------)
+ *                          2             1 - x                      1 - x
+ *
+ * Special cases:
+ *     atanh(x) is NaN if |x| > 1 with signal;
+ *     atanh(NaN) is that NaN with no signal;
+ *     atanh(+-1) is +-INF with signal.
+ *
+ * Accuracy:
+ *     atanh(x) returns the exact hyperbolic arc tangent of x nearly rounded.
+ *     In a test run with 512,000 random arguments on a VAX, the maximum
+ *     observed error was 1.87 ulps (units in the last place) at
+ *     x= -3.8962076028810414000e-03.
+ */
+#include "mathimpl.h"
+
+#if defined(__vax__)||defined(tahoe)
+#include <errno.h>
+#endif /* defined(__vax__)||defined(tahoe) */
+
+float
+atanhf(float x)
+{
+       float z;
+       z = copysignf(0.5,x);
+       x = copysignf(x,1.0);
+#if defined(__vax__)||defined(tahoe)
+       if (x == 1.0) {
+           return(copysignf(1.0,z)*infnan(ERANGE));    /* sign(x)*INF */
+       }
+#endif /* defined(__vax__)||defined(tahoe) */
+       x = x/(1.0-x);
+       return( z*log1pf(x+x) );
+}