view Common/Drivers/CMSIS/Include/core_cmSimd.h @ 224:ceecabfddb57 div-fixes-3

Bugfix, deco: fix 2 (small) problems with calculated ceiling This fixes 1 trivial, and 1 not really trivial bug in the calculation of the ceiling. When simulating a bounce dive to 80m, things become clear (tried this on a CCR dive, fixed setpoint 1.2bar, about 15 minutes of bottom time). Closely watch the behavior of the ceiling data. At some point during the ascent, the ceiling begins to decrease in 10cm steps. Then suddenly (while still ascending), the ceiling increases again with 1m, does not change for some time, and then suddenly steps 1.1m less deep. While not very relevant to real deco diving, it is simply wrong. The reason for this is subtle. The algorithm used to find the ceiling is a sort of linear search, stepping down a meter, overshoot the depth, and search back in 10cm steps. It seems some numerical instability. Fixing this, was a bit more computational intensive search by stepping up down in equal steps of 10cm. But, I'm pretty sure that things can be speeded up here, as a ceiling does not change fast, so it should be not that difficult to limit the search space, or use a binary search algorithm instead. The trivial second problem fixed, is that the ceiling ends at the surface and not at 1m depth. This small issue became visible after changing the step down size above. Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
author Jan Mulder <jlmulder@xs4all.nl>
date Sun, 31 Mar 2019 19:35:51 +0200
parents c78bcbd5deda
children
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/**************************************************************************//**
 * @file     core_cmSimd.h
 * @brief    CMSIS Cortex-M SIMD 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_CMSIMD_H
#define __CORE_CMSIMD_H

#ifdef __cplusplus
 extern "C" {
#endif


/* ###################  Compiler specific Intrinsics  ########################### */
/** \defgroup CMSIS_SIMD_intrinsics CMSIS SIMD Intrinsics
  Access to dedicated SIMD 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_SIMD_intrinsics */


#ifdef __cplusplus
}
#endif

#endif /* __CORE_CMSIMD_H */