compiler/mlib/s_scalbln.c

   1 /*-
   2  * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD: src/lib/msun/src/s_scalbln.c,v 1.2 2005/03/07 04:57:50 das Exp $");
  29
  30 #include <limits.h>
  31 #include <math.h>
  32
  33 double
  34 scalbln (double x, long n)
  35 {
  36         int in;
  37
  38         in = (int)n;
  39         if (in != n) {
  40                 if (n > 0)
  41                         in = INT_MAX;
  42                 else
  43                         in = INT_MIN;
  44         }
  45         return (scalbn(x, in));
  46 }
  47
  48 float
  49 scalblnf (float x, long n)
  50 {
  51         int in;
  52
  53         in = (int)n;
  54         if (in != n) {
  55                 if (n > 0)
  56                         in = INT_MAX;
  57                 else
  58                         in = INT_MIN;
  59         }
  60         return (scalbnf(x, in));
  61 }
  62
  63 long double
  64 scalblnl (long double x, long n)
  65 {
  66         int in;
  67
  68         in = (int)n;
  69         if (in != n) {
  70                 if (n > 0)
  71                         in = INT_MAX;
  72                 else
  73                         in = INT_MIN;
  74         }
  75         return (scalbnl(x, (int)n));
  76 }