Mercurial > public > ostc4
view Common/Drivers/CMSIS/Include/core_cmInstr.h @ 250:822416168585 bm-2
Buelmann: new implementation for ceiling
Since my first functional fix in the ceiling computation in
commit ceecabfddb57, I noticed that the computation used a
linear search, that became rather computational expensive after
that commit. The simple question is: why not a binary search?
So, this commit implements the binary search. But there is a long
story attached to this. Comparing ceiling results from hwOS and this
OSTC4 code were very different. Basically, the original OSTC4
algorithm computed the ceiling using the same GFlow to GFhigh
slope, in such a way, that the ceiling was in sync with the
presented deco stops, where the hwOS code presents a GFhigh
based ceiling.
This said, it is more logical when the OSTC4 and hwOS code give
similar results. This new recursive algorithm gives very similar
results for the ceiling compared to hwOS.
To be complete here, the Buelmann ceiling is the depth to which
you can ascend, so that the leading tissue reaches GFhigh. This
also explains why the deepest deco stop is normally deeper than
the ceiling (unless one dives with GF like 80/80).
The code implemented here is rather straightforward recursion.
Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
author | Jan Mulder <jlmulder@xs4all.nl> |
---|---|
date | Thu, 11 Apr 2019 17:48:48 +0200 |
parents | c78bcbd5deda |
children |
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/**************************************************************************//** * @file core_cmInstr.h * @brief CMSIS Cortex-M Core Instruction Access Header File * @version V4.30 * @date 20. October 2015 ******************************************************************************/ /* Copyright (c) 2009 - 2015 ARM LIMITED All rights reserved. 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 ARM nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. * 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 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS 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. ---------------------------------------------------------------------------*/ #if defined ( __ICCARM__ ) #pragma system_include /* treat file as system include file for MISRA check */ #elif defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050) #pragma clang system_header /* treat file as system include file */ #endif #ifndef __CORE_CMINSTR_H #define __CORE_CMINSTR_H /* ########################## Core Instruction Access ######################### */ /** \defgroup CMSIS_Core_InstructionInterface CMSIS Core Instruction Interface Access to dedicated instructions @{ */ /*------------------ RealView Compiler -----------------*/ #if defined ( __CC_ARM ) #include "cmsis_armcc.h" /*------------------ ARM Compiler V6 -------------------*/ #elif defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050) #include "cmsis_armcc_V6.h" /*------------------ GNU Compiler ----------------------*/ #elif defined ( __GNUC__ ) #include "cmsis_gcc.h" /*------------------ ICC Compiler ----------------------*/ #elif defined ( __ICCARM__ ) #include <cmsis_iar.h> /*------------------ TI CCS Compiler -------------------*/ #elif defined ( __TMS470__ ) #include <cmsis_ccs.h> /*------------------ TASKING Compiler ------------------*/ #elif defined ( __TASKING__ ) /* * The CMSIS functions have been implemented as intrinsics in the compiler. * Please use "carm -?i" to get an up to date list of all intrinsics, * Including the CMSIS ones. */ /*------------------ COSMIC Compiler -------------------*/ #elif defined ( __CSMC__ ) #include <cmsis_csm.h> #endif /*@}*/ /* end of group CMSIS_Core_InstructionInterface */ #endif /* __CORE_CMINSTR_H */