65 lines
2.2 KiB
C
65 lines
2.2 KiB
C
/*-
|
|
* 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.
|
|
*/
|
|
#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__ */
|