usr/src/lib/libm/common/C/xpg6.h

   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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  23  */
  24 /*
  25  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  26  * Use is subject to license terms.
  27  */
  28
  29 #ifndef _XPG6_H
  30 #define _XPG6_H
  31
  32 /*
  33  * The bits in lib/libc/inc/xpg6.h fpgroup may use as per PSARC/2003/486.
  34  */
  35
  36 /*
  37  * If set, math library entry points present in SUSv2 deal with exceptional
  38  * cases as per SUSv3 spec where math_errhandling is set to MATH_ERREXCEPT;
  39  * otherwise they behave as per SUSv2 spec.
  40  */
  41 #define _C99SUSv3_math_errexcept                0x00000400
  42 /*
  43  * If set, pow(+/-1,+/-Inf) & pow(1,NaN) return 1; otherwise NaN is returned.
  44  * Analogous comment applies to powf and powl.
  45  */
  46 #define _C99SUSv3_pow_treats_Inf_as_an_even_int 0x00000080
  47 /*
  48  * If set, logb(subnormal) returns (double) ilogb(subnormal); otherwise
  49  * logb(subnormal) returns logb(DBL_MIN).  Analogous comment applies to
  50  * logbf and logbl.
  51  */
  52 #define _C99SUSv3_logb_subnormal_is_like_ilogb  0x00000040
  53 /*
  54  * If set, ilogb(0/+Inf/-Inf/NaN) raises FE_INVALID as per SUSv3; otherwise
  55  * no exception is raised.  Analogous comment applies to ilogbf and ilogbl.
  56  */
  57 #define _C99SUSv3_ilogb_0InfNaN_raises_invalid  0x00000020
  58
  59 /*
  60  * __xpg6 = _C99SUSv3_mode_OFF disables C99/SUSv3 standards conformance mode.
  61  */
  62 #define _C99SUSv3_mode_OFF      0xFFFF0000
  63
  64 #if !defined(_ASM)
  65 extern unsigned int __xpg6;
  66 #endif
  67
  68 #endif /* _XPG6_H */