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/*-
* Copyright (c) 2016 Adrian Chadd <adrian@FreeBSD.org>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
* redistribution must be conditioned upon including a substantially
* similar Disclaimer requirement for further binary redistribution.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
*
* $FreeBSD$
*/
#ifndef __IF_BWN_UTIL_H__
#define __IF_BWN_UTIL_H__
/* Hamming weight; used in the PHY routines */
static inline int
bwn_hweight32(uint32_t val)
{
int i, r = 0;
/* yes, could do it without a loop.. */
for (i = 0; i < 32; i++) {
r = r + (val & 1);
val = val >> 1;
}
return r;
}
/* Clamp value; PHY code */
static inline int
bwn_clamp_val(int val, int lo, int hi)
{
if (val < lo)
return lo;
if (val > hi)
return hi;
return val;
}
/* Q52 format - used in PHY routines */
#define INT_TO_Q52(i) ((i) << 2)
#define Q52_TO_INT(q52) ((q52) >> 2)
#define Q52_FMT "%u.%u"
#define Q52_ARG(q52) Q52_TO_INT(q52), ((((q52) & 0x3) * 100) / 4)
extern unsigned int bwn_sqrt(struct bwn_mac *mac, unsigned int x);
#endif /* __IF_BWN_UTIL_H__ */
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