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<h1>arm_min_q15.c</h1> </div>
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<a href="arm__min__q15_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* ---------------------------------------------------------------------- </span>
<a name="l00002"></a>00002 <span class="comment">* Copyright (C) 2010 ARM Limited. All rights reserved. </span>
<a name="l00003"></a>00003 <span class="comment">* </span>
<a name="l00004"></a>00004 <span class="comment">* $Date: 15. July 2011 </span>
<a name="l00005"></a>00005 <span class="comment">* $Revision: V1.0.10 </span>
<a name="l00006"></a>00006 <span class="comment">* </span>
<a name="l00007"></a>00007 <span class="comment">* Project: CMSIS DSP Library </span>
<a name="l00008"></a>00008 <span class="comment">* Title: arm_min_q15.c </span>
<a name="l00009"></a>00009 <span class="comment">* </span>
<a name="l00010"></a>00010 <span class="comment">* Description: Minimum value of a Q15 vector. </span>
<a name="l00011"></a>00011 <span class="comment">* </span>
<a name="l00012"></a>00012 <span class="comment">* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0</span>
<a name="l00013"></a>00013 <span class="comment">* </span>
<a name="l00014"></a>00014 <span class="comment">* Version 1.0.10 2011/7/15 </span>
<a name="l00015"></a>00015 <span class="comment">* Big Endian support added and Merged M0 and M3/M4 Source code. </span>
<a name="l00016"></a>00016 <span class="comment">* </span>
<a name="l00017"></a>00017 <span class="comment">* Version 1.0.3 2010/11/29 </span>
<a name="l00018"></a>00018 <span class="comment">* Re-organized the CMSIS folders and updated documentation. </span>
<a name="l00019"></a>00019 <span class="comment">* </span>
<a name="l00020"></a>00020 <span class="comment">* Version 1.0.2 2010/11/11 </span>
<a name="l00021"></a>00021 <span class="comment">* Documentation updated. </span>
<a name="l00022"></a>00022 <span class="comment">* </span>
<a name="l00023"></a>00023 <span class="comment">* Version 1.0.1 2010/10/05 </span>
<a name="l00024"></a>00024 <span class="comment">* Production release and review comments incorporated. </span>
<a name="l00025"></a>00025 <span class="comment">* </span>
<a name="l00026"></a>00026 <span class="comment">* Version 1.0.0 2010/09/20 </span>
<a name="l00027"></a>00027 <span class="comment">* Production release and review comments incorporated. </span>
<a name="l00028"></a>00028 <span class="comment">* ---------------------------------------------------------------------------- */</span>
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <span class="preprocessor">#include &quot;<a class="code" href="arm__math_8h.html">arm_math.h</a>&quot;</span>
<a name="l00031"></a>00031
<a name="l00053"></a><a class="code" href="group___min.html#gad065e37535ebb726750ac1545cb3fa6f">00053</a> <span class="keywordtype">void</span> <a class="code" href="group___min.html#gad065e37535ebb726750ac1545cb3fa6f" title="Minimum value of a Q15 vector.">arm_min_q15</a>(
<a name="l00054"></a>00054 <a class="code" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea" title="16-bit fractional data type in 1.15 format.">q15_t</a> * pSrc,
<a name="l00055"></a>00055 uint32_t <a class="code" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>,
<a name="l00056"></a>00056 <a class="code" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea" title="16-bit fractional data type in 1.15 format.">q15_t</a> * pResult,
<a name="l00057"></a>00057 uint32_t * pIndex)
<a name="l00058"></a>00058 {
<a name="l00059"></a>00059 <a class="code" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea" title="16-bit fractional data type in 1.15 format.">q15_t</a> minVal, out; <span class="comment">/* Temporary variables to store the output value. */</span>
<a name="l00060"></a>00060 uint32_t blkCnt, outIndex; <span class="comment">/* loop counter */</span>
<a name="l00061"></a>00061
<a name="l00062"></a>00062 <span class="comment">/* Initialise the index value to zero. */</span>
<a name="l00063"></a>00063 outIndex = 0u;
<a name="l00064"></a>00064 <span class="comment">/* Load first input value that act as reference value for comparision */</span>
<a name="l00065"></a>00065 out = *pSrc++;
<a name="l00066"></a>00066
<a name="l00067"></a>00067 <span class="preprocessor">#ifndef ARM_MATH_CM0</span>
<a name="l00068"></a>00068 <span class="preprocessor"></span>
<a name="l00069"></a>00069 <span class="comment">/* Run the below code for Cortex-M4 and Cortex-M3 */</span>
<a name="l00070"></a>00070
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <span class="comment">/* Loop over blockSize number of values */</span>
<a name="l00073"></a>00073 blkCnt = (blockSize - 1u);
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <span class="keywordflow">do</span>
<a name="l00076"></a>00076 {
<a name="l00077"></a>00077 <span class="comment">/* Initialize minVal to the next consecutive values one by one */</span>
<a name="l00078"></a>00078 minVal = *pSrc++;
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <span class="comment">/* compare for the minimum value */</span>
<a name="l00081"></a>00081 <span class="keywordflow">if</span>(out &gt; minVal)
<a name="l00082"></a>00082 {
<a name="l00083"></a>00083 <span class="comment">/* Update the minimum value and its index */</span>
<a name="l00084"></a>00084 out = minVal;
<a name="l00085"></a>00085 outIndex = blockSize - blkCnt;
<a name="l00086"></a>00086 }
<a name="l00087"></a>00087
<a name="l00088"></a>00088 blkCnt--;
<a name="l00089"></a>00089
<a name="l00090"></a>00090 } <span class="keywordflow">while</span>(blkCnt &gt; 0u);
<a name="l00091"></a>00091
<a name="l00092"></a>00092 <span class="preprocessor">#else</span>
<a name="l00093"></a>00093 <span class="preprocessor"></span>
<a name="l00094"></a>00094 <span class="comment">/* Run the below code for Cortex-M0 */</span>
<a name="l00095"></a>00095
<a name="l00096"></a>00096 <span class="comment">/* Loop over blockSize - 1 number of values */</span>
<a name="l00097"></a>00097 blkCnt = (blockSize - 1u);
<a name="l00098"></a>00098
<a name="l00099"></a>00099 <span class="keywordflow">while</span>(blkCnt &gt; 0u)
<a name="l00100"></a>00100 {
<a name="l00101"></a>00101 <span class="comment">/* Initialize minVal to the next consecutive values one by one */</span>
<a name="l00102"></a>00102 minVal = *pSrc++;
<a name="l00103"></a>00103
<a name="l00104"></a>00104 <span class="comment">/* compare for the minimum value */</span>
<a name="l00105"></a>00105 <span class="keywordflow">if</span>(out &gt; minVal)
<a name="l00106"></a>00106 {
<a name="l00107"></a>00107 <span class="comment">/* Update the minimum value and its index */</span>
<a name="l00108"></a>00108 out = minVal;
<a name="l00109"></a>00109 outIndex = blockSize - blkCnt;
<a name="l00110"></a>00110 }
<a name="l00111"></a>00111
<a name="l00112"></a>00112 <span class="comment">/* Decrement the loop counter */</span>
<a name="l00113"></a>00113 blkCnt--;
<a name="l00114"></a>00114
<a name="l00115"></a>00115 }
<a name="l00116"></a>00116
<a name="l00117"></a>00117 <span class="preprocessor">#endif </span><span class="comment">/* #ifndef ARM_MATH_CM0 */</span>
<a name="l00118"></a>00118
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="comment">/* Store the minimum value and its index into destination pointers */</span>
<a name="l00121"></a>00121 *pResult = out;
<a name="l00122"></a>00122 *pIndex = outIndex;
<a name="l00123"></a>00123 }
<a name="l00124"></a>00124
</pre></div></div>
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