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https://github.com/ArduPilot/ardupilot
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43262a573f
Strip the stdio integration from FastSerial as we aren't using it and it just wastes space. Note that this does not attempt to fix the bogus floating point handling in ::print(ln). That's an issue for another day. BetterStream::printf(_P) aka FastSerial::printf(_P) support is now as documented for avr-libc printf with floating point support enabled. git-svn-id: https://arducopter.googlecode.com/svn/trunk@895 f9c3cf11-9bcb-44bc-f272-b75c42450872
55 lines
2.3 KiB
C
55 lines
2.3 KiB
C
/* Copyright (c) 2007, Dmitry Xmelkov
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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* Neither the name of the copyright holders nor the names of
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE. */
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/* $Id: ntz.h 1217 2007-02-18 13:18:05Z dmix $ */
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#ifndef _NTZ_H
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#define _NTZ_H
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/* Number of Tail Zeros: ntz(x)= (ffs(x) ? ffs(x)-1 : 16)
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It works with all: cpp, gcc and gas expressions. */
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#define ntz(x) \
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( (1 & (((x) & 1) == 0)) \
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+ (1 & (((x) & 3) == 0)) \
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+ (1 & (((x) & 7) == 0)) \
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+ (1 & (((x) & 017) == 0)) \
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+ (1 & (((x) & 037) == 0)) \
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+ (1 & (((x) & 077) == 0)) \
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+ (1 & (((x) & 0177) == 0)) \
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+ (1 & (((x) & 0377) == 0)) \
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+ (1 & (((x) & 0777) == 0)) \
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+ (1 & (((x) & 01777) == 0)) \
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+ (1 & (((x) & 03777) == 0)) \
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+ (1 & (((x) & 07777) == 0)) \
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+ (1 & (((x) & 017777) == 0)) \
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+ (1 & (((x) & 037777) == 0)) \
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+ (1 & (((x) & 077777) == 0)) \
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+ (1 & (((x) & 0177777) == 0)) )
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#endif /* !_NTZ_H */
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