w_scalb.c   [plain text]


/*
 * Copyright (c) 2002 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
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 * @APPLE_LICENSE_HEADER_END@
 */
/*******************************************************************************
*                                                                              *
*     File:  w_scalb.c                                                         *
*                                                                              *
*     Contains: Wrapper from legacy scalb to C99 scalbn.		       *
*                                                                              *
*     Copyright  2001 Apple Computer, Inc.  All rights reserved.              *
*                                                                              *
*     Written by Stephen C. Peters, started in November 2001.                  *
*                                                                              *
*     A MathLib v5 file.                                                       *
*                                                                              *
*     Change History (most recent first):                                      *
*                                                                              *
*     21 Nov 01   scp   First created.                                         *
*                                                                              *
*     W A R N I N G:                                                           *
*     These routines require a 64-bit double precision IEEE-754 model.         *
*     They are written for PowerPC only and are expecting the compiler         *
*     to generate the correct sequence of multiply-add fused instructions.     *
*                                                                              *
*     These routines are not intended for 32-bit Intel architectures.          *
*                                                                              *
*     A version of gcc higher than 932 is required.                            *
*                                                                              *
*     GCC compiler options:                                                    *
*           optimization level 3 (-O3)                                         *
*           -fschedule-insns -finline-functions -funroll-all-loops             *
*                                                                              *
*******************************************************************************/

#if !defined(__LP64__) /* Do not carry legacy scalb() API into the LP64 ABI */

double scalb ( double x, int n  );      //cant use math.h header here. This is the legacy scalb that isn't in math.h anymore
extern double scalbn ( double, int );
double scalb ( double x, int n  )
{
    return scalbn ( x, n );
}
#endif