BSD 4_3_Net_2 release

[unix-history] / usr / src / lib / libm / common_source / acosh.c

diff --git a/usr/src/lib/libm/common_source/acosh.c b/usr/src/lib/libm/common_source/acosh.c
index e4b008e..75dfe96 100644 (file)
--- a/usr/src/lib/libm/common_source/acosh.c
+++ b/usr/src/lib/libm/common_source/acosh.c
@@ -1,19 +1,39 @@
-/* 
+/*

  * Copyright (c) 1985 Regents of the University of California.
  * Copyright (c) 1985 Regents of the University of California.

- * 
- * Use and reproduction of this software are granted  in  accordance  with
- * the terms and conditions specified in  the  Berkeley  Software  License
- * Agreement (in particular, this entails acknowledgement of the programs'
- * source, and inclusion of this notice) with the additional understanding
- * that  all  recipients  should regard themselves as participants  in  an
- * ongoing  research  project and hence should  feel  obligated  to report
- * their  experiences (good or bad) with these elementary function  codes,
- * using "sendbug 4bsd-bugs@BERKELEY", to the authors.
+ * 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.

  */
 
 #ifndef lint
  */
 
 #ifndef lint

-static char sccsid[] = "@(#)acosh.c    1.1 (ELEFUNT) %G%";
-#endif not lint
+static char sccsid[] = "@(#)acosh.c    5.6 (Berkeley) 10/9/90";
+#endif /* not lint */

 
 /* ACOSH(X)
  * RETURN THE INVERSE HYPERBOLIC COSINE OF X
 
 /* ACOSH(X)
  * RETURN THE INVERSE HYPERBOLIC COSINE OF X


@@ -52,28 +72,27 @@ static char sccsid[] = "@(#)acosh.c 1.1 (ELEFUNT) %G%";
  * shown.
  */
 
  * shown.
  */
 

-#ifdef VAX     /* VAX D format */
-/* static double */
-/* ln2hi  =  6.9314718055829871446E-1    , Hex  2^  0   *  .B17217F7D00000 */
-/* ln2lo  =  1.6465949582897081279E-12   ; Hex  2^-39   *  .E7BCD5E4F1D9CC */
-static long     ln2hix[] = { 0x72174031, 0x0000f7d0};
-static long     ln2lox[] = { 0xbcd52ce7, 0xd9cce4f1};
-#define    ln2hi    (*(double*)ln2hix)
-#define    ln2lo    (*(double*)ln2lox)
-#else  /* IEEE double */
-static double
-ln2hi  =  6.9314718036912381649E-1    , /*Hex  2^ -1   *  1.62E42FEE00000 */
-ln2lo  =  1.9082149292705877000E-10   ; /*Hex  2^-33   *  1.A39EF35793C76 */
+#include "mathimpl.h"
+
+vc(ln2hi, 6.9314718055829871446E-1  ,7217,4031,0000,f7d0,   0, .B17217F7D00000)
+vc(ln2lo, 1.6465949582897081279E-12 ,bcd5,2ce7,d9cc,e4f1, -39, .E7BCD5E4F1D9CC)
+
+ic(ln2hi, 6.9314718036912381649E-1,  -1, 1.62E42FEE00000)
+ic(ln2lo, 1.9082149292705877000E-10,-33, 1.A39EF35793C76)
+
+#ifdef vccast
+#define    ln2hi    vccast(ln2hi)
+#define    ln2lo    vccast(ln2lo)

 #endif
 
 double acosh(x)
 double x;
 {      
 #endif
 
 double acosh(x)
 double x;
 {      

-       double log1p(),sqrt(),t,big=1.E20; /* big+1==big */
+       double t,big=1.E20; /* big+1==big */

 
 

-#ifndef VAX
+#if !defined(vax)&&!defined(tahoe)

        if(x!=x) return(x);     /* x is NaN */
        if(x!=x) return(x);     /* x is NaN */

-#endif
+#endif /* !defined(vax)&&!defined(tahoe) */

 
     /* return log1p(x) + log(2) if x is large */
        if(x>big) {t=log1p(x)+ln2lo; return(t+ln2hi);} 
 
     /* return log1p(x) + log(2) if x is large */
        if(x>big) {t=log1p(x)+ln2lo; return(t+ln2hi);}