X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/95f51977ddc18faa2e212f30c00a39540b39f325..ca67e7b465996afb3821d6a075c4dc6a7f0f5d52:/usr/src/usr.lib/libm/expm1.c

diff --git a/usr/src/usr.lib/libm/expm1.c b/usr/src/usr.lib/libm/expm1.c
index 86eacbe7ce..347a41edff 100644
--- a/usr/src/usr.lib/libm/expm1.c
+++ b/usr/src/usr.lib/libm/expm1.c
@@ -1,19 +1,28 @@
-/* 
+/*
  * 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 are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * 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
+ * the sendbug(8) program, to the authors.
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)expm1.c	1.2 (Berkeley) 8/21/85";
-#endif not lint
+static char sccsid[] = "@(#)expm1.c	5.3 (Berkeley) 6/30/88";
+#endif /* not lint */
 
 /* EXPM1(X)
  * RETURN THE EXPONENTIAL OF X MINUS ONE
@@ -66,42 +75,47 @@ static char sccsid[] = "@(#)expm1.c	1.2 (Berkeley) 8/21/85";
  * shown.
  */
 
-#ifdef VAX	/* VAX D format */
-/* double static */
+#if defined(vax)||defined(tahoe)	/* VAX D format */
+#ifdef vax
+#define _0x(A,B)	0x/**/A/**/B
+#else	/* vax */
+#define _0x(A,B)	0x/**/B/**/A
+#endif	/* vax */
+/* static double */
 /* ln2hi  =  6.9314718055829871446E-1    , Hex  2^  0   *  .B17217F7D00000 */
 /* ln2lo  =  1.6465949582897081279E-12   , Hex  2^-39   *  .E7BCD5E4F1D9CC */
 /* lnhuge =  9.4961163736712506989E1     , Hex  2^  7   *  .BDEC1DA73E9010 */
 /* invln2 =  1.4426950408889634148E0     ; Hex  2^  1   *  .B8AA3B295C17F1 */
-static long     ln2hix[] = { 0x72174031, 0x0000f7d0};
-static long     ln2lox[] = { 0xbcd52ce7, 0xd9cce4f1};
-static long    lnhugex[] = { 0xec1d43bd, 0x9010a73e};
-static long    invln2x[] = { 0xaa3b40b8, 0x17f1295c};
+static long     ln2hix[] = { _0x(7217,4031), _0x(0000,f7d0)};
+static long     ln2lox[] = { _0x(bcd5,2ce7), _0x(d9cc,e4f1)};
+static long    lnhugex[] = { _0x(ec1d,43bd), _0x(9010,a73e)};
+static long    invln2x[] = { _0x(aa3b,40b8), _0x(17f1,295c)};
 #define    ln2hi    (*(double*)ln2hix)
 #define    ln2lo    (*(double*)ln2lox)
 #define   lnhuge    (*(double*)lnhugex)
 #define   invln2    (*(double*)invln2x)
-#else	/* IEEE double */
-double static
+#else	/* defined(vax)||defined(tahoe)	*/
+static double
 ln2hi  =  6.9314718036912381649E-1    , /*Hex  2^ -1   *  1.62E42FEE00000 */
 ln2lo  =  1.9082149292705877000E-10   , /*Hex  2^-33   *  1.A39EF35793C76 */
 lnhuge =  7.1602103751842355450E2     , /*Hex  2^  9   *  1.6602B15B7ECF2 */
 invln2 =  1.4426950408889633870E0     ; /*Hex  2^  0   *  1.71547652B82FE */
-#endif
+#endif	/* defined(vax)||defined(tahoe)	*/
 
 double expm1(x)
 double x;
 {
-	double static one=1.0, half=1.0/2.0; 
+	static double one=1.0, half=1.0/2.0; 
 	double scalb(), copysign(), exp__E(), z,hi,lo,c;
 	int k,finite();
-#ifdef VAX
+#if defined(vax)||defined(tahoe)
 	static prec=56;
-#else	/* IEEE double */
+#else	/* defined(vax)||defined(tahoe) */
 	static prec=53;
-#endif
-#ifndef VAX
+#endif	/* defined(vax)||defined(tahoe) */
+#if !defined(vax)&&!defined(tahoe)
 	if(x!=x) return(x);	/* x is NaN */
-#endif
+#endif	/* !defined(vax)&&!defined(tahoe) */
 
 	if( x <= lnhuge ) {
 		if( x >= -40.0 ) {