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/*
* Copyright 2008-2012 Freescale Semiconductor Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Freescale Semiconductor nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") as published by the Free Software
* Foundation, either version 2 of that License or (at your option) any
* later version.
*
* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __MATH_EXT_H
#define __MATH_EXT_H
#if defined(NCSW_LINUX) && defined(__KERNEL__)
#include <linux/math.h>
#include <linux/math64.h>
#elif defined(__MWERKS__)
#define LOW(x) ( sizeof(x)==8 ? *(1+(int32_t*)&x) : (*(int32_t*)&x))
#define HIGH(x) (*(int32_t*)&x)
#define ULOW(x) ( sizeof(x)==8 ? *(1+(uint32_t*)&x) : (*(uint32_t*)&x))
#define UHIGH(x) (*(uint32_t*)&x)
static const double big = 1.0e300;
/* Macro for checking if a number is a power of 2 */
static __inline__ double ceil(double x)
{
int32_t i0,i1,j0; /*- cc 020130 -*/
uint32_t i,j; /*- cc 020130 -*/
i0 = HIGH(x);
i1 = LOW(x);
j0 = ((i0>>20)&0x7ff)-0x3ff;
if(j0<20) {
if(j0<0) { /* raise inexact if x != 0 */
if(big+x>0.0) {/* return 0*sign(x) if |x|<1 */
if(i0<0) {i0=0x80000000;i1=0;}
else if((i0|i1)!=0) { i0=0x3ff00000;i1=0;}
}
} else {
i = (uint32_t)(0x000fffff)>>j0;
if(((i0&i)|i1)==0) return x; /* x is integral */
if(big+x>0.0) { /* raise inexact flag */
if(i0>0) i0 += (0x00100000)>>j0;
i0 &= (~i); i1=0;
}
}
} else if (j0>51) {
if(j0==0x400) return x+x; /* inf or NaN */
else return x; /* x is integral */
} else {
i = ((uint32_t)(0xffffffff))>>(j0-20); /*- cc 020130 -*/
if((i1&i)==0) return x; /* x is integral */
if(big+x>0.0) { /* raise inexact flag */
if(i0>0) {
if(j0==20) i0+=1;
else {
j = (uint32_t)(i1 + (1<<(52-j0)));
if(j<i1) i0+=1; /* got a carry */
i1 = (int32_t)j;
}
}
i1 &= (~i);
}
}
HIGH(x) = i0;
LOW(x) = i1;
return x;
}
#else
#include <math.h>
#endif /* defined(NCSW_LINUX) && defined(__KERNEL__) */
#endif /* __MATH_EXT_H */
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