usr/src/lib/libc/port/fp/fp_data.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*      Copyright (c) 1988 AT&T */
  23 /*        All Rights Reserved   */
  24
  25
  26 /*
  27  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30
  31 #pragma ident   "%Z%%M% %I%     %E% SMI"        /* SVr4.0 1.8   */
  32
  33 /*
  34  * contains the definitions
  35  * of the global constant __huge_val used
  36  * by the floating point environment
  37  */
  38
  39 /*
  40  * XXX - the preferred fix for this sits in delta 1.12.
  41  * But the following code is the only way to fix this given the lint and cc
  42  * we use now.  Newer compilers and lints should fix this so we can
  43  * put delta 1.12 back.  See 6208626.
  44  */
  45
  46 #include <sys/feature_tests.h>
  47
  48 #undef _STDC_C99        /* to force the definition of '_h_val' */
  49 #undef __C99FEATURES__  /* to force the definition of '_h_val' */
  50
  51 #include <math.h>               /* for '_h_val' */
  52
  53 /* IEEE infinity */
  54 const _h_val __huge_val =
  55 #if defined(_LP64)                      /* long == long long */
  56         { 0x7ff0000000000000ull };
  57 #elif defined(_LONG_LONG_HTOL)          /* like 32-bit sparc */
  58         { 0x7ff00000ul, 0x00000000ul };
  59 #elif defined(_LONG_LONG_LTOH)          /* like 32-bit x86 */
  60         { 0x00000000ul, 0x7ff00000ul };
  61 #else
  62 #error "none of { _LP64 _LONG_LONG_HTOL _LONG_LONG_LTOH } is defined"
  63 #endif