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/*
* Copyright (C) 2013 Jeff Epler <jepler@unpythonic.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef RTAPI_MATH64_H
#define RTAPI_MATH64_H
#ifdef __KERNEL__
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26)
#include <asm/div64.h>
static inline __u64 rtapi_div_u64_rem(__u64 dividend, __u32 divisor, __u32 *remainder)
{
*remainder = do_div(dividend, divisor);
return dividend;
}
static inline __u64 rtapi_div_u64(__u64 dividend, __u32 divisor)
{
__u32 remainder;
return rtapi_div_u64_rem(dividend, divisor, &remainder);
}
static inline __s64 rtapi_div_s64_rem(__s64 dividend, __s32 divisor, __s32 *remainder)
{
int sgn_dividend = (dividend < 0) ^ (divisor < 0);
int sgn_remainder = (dividend < 0);
if(dividend < 0) dividend = -dividend;
if(divisor < 0) divisor = -divisor;
*remainder = sgn_remainder
? -do_div(dividend, divisor) : do_div(dividend, divisor);
return sgn_dividend ? -dividend : dividend;
}
static inline __s64 rtapi_div_s64(__s64 dividend, __s32 divisor)
{
__s32 remainder;
return rtapi_div_s64_rem(dividend, divisor, &remainder);
}
#else
#include <linux/math64.h>
#define rtapi_div_u64_rem div_u64_rem
#define rtapi_div_u64 div_u64
#define rtapi_div_s64_rem div_s64_rem
#define rtapi_div_s64 div_s64
#endif
#else
static inline __u64 rtapi_div_u64_rem(__u64 dividend, __u32 divisor, __u32 *remainder)
{
*remainder = dividend % divisor;
return dividend / divisor;
}
static inline __u64 rtapi_div_u64(__u64 dividend, __u32 divisor) {
return dividend / divisor;
}
static inline __s64 rtapi_div_s64_rem(__s64 dividend, __s32 divisor, __s32 *remainder)
{
*remainder = dividend % divisor;
return dividend / divisor;
}
static inline __s64 rtapi_div_s64(__s64 dividend, __s32 divisor) {
return dividend / divisor;
}
#endif
#endif
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