diff options
Diffstat (limited to 'drivers/net/ethernet/freescale/sdk_fman/inc/math_ext.h')
| -rw-r--r-- | drivers/net/ethernet/freescale/sdk_fman/inc/math_ext.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/drivers/net/ethernet/freescale/sdk_fman/inc/math_ext.h b/drivers/net/ethernet/freescale/sdk_fman/inc/math_ext.h new file mode 100644 index 0000000..4ecfc6e --- /dev/null +++ b/drivers/net/ethernet/freescale/sdk_fman/inc/math_ext.h @@ -0,0 +1,100 @@ +/* + * 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 */ |