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| <h1>arm_scale_f32.c</h1> </div> |
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| <a href="arm__scale__f32_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_scale_f32.c </span> |
| <a name="l00009"></a>00009 <span class="comment">* </span> |
| <a name="l00010"></a>00010 <span class="comment">* Description: Multiplies a floating-point vector by a scalar. </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 <span class="comment">* Version 0.0.7 2010/06/10 </span> |
| <a name="l00030"></a>00030 <span class="comment">* Misra-C changes done </span> |
| <a name="l00031"></a>00031 <span class="comment">* ---------------------------------------------------------------------------- */</span> |
| <a name="l00032"></a>00032 |
| <a name="l00033"></a>00033 <span class="preprocessor">#include "<a class="code" href="arm__math_8h.html">arm_math.h</a>"</span> |
| <a name="l00034"></a>00034 |
| <a name="l00078"></a><a class="code" href="group__scale.html#ga3487af88b112f682ee90589cd419e123">00078</a> <span class="keywordtype">void</span> <a class="code" href="group__scale.html#ga3487af88b112f682ee90589cd419e123" title="Multiplies a floating-point vector by a scalar.">arm_scale_f32</a>( |
| <a name="l00079"></a>00079 <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> * pSrc, |
| <a name="l00080"></a>00080 <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> scale, |
| <a name="l00081"></a>00081 <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> * pDst, |
| <a name="l00082"></a>00082 uint32_t <a class="code" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>) |
| <a name="l00083"></a>00083 { |
| <a name="l00084"></a>00084 uint32_t blkCnt; <span class="comment">/* loop counter */</span> |
| <a name="l00085"></a>00085 |
| <a name="l00086"></a>00086 <span class="preprocessor">#ifndef ARM_MATH_CM0</span> |
| <a name="l00087"></a>00087 <span class="preprocessor"></span> |
| <a name="l00088"></a>00088 <span class="comment">/* Run the below code for Cortex-M4 and Cortex-M3 */</span> |
| <a name="l00089"></a>00089 <span class="comment">/*loop Unrolling */</span> |
| <a name="l00090"></a>00090 blkCnt = blockSize >> 2u; |
| <a name="l00091"></a>00091 |
| <a name="l00092"></a>00092 <span class="comment">/* First part of the processing with loop unrolling. Compute 4 outputs at a time. </span> |
| <a name="l00093"></a>00093 <span class="comment"> ** a second loop below computes the remaining 1 to 3 samples. */</span> |
| <a name="l00094"></a>00094 <span class="keywordflow">while</span>(blkCnt > 0u) |
| <a name="l00095"></a>00095 { |
| <a name="l00096"></a>00096 <span class="comment">/* C = A * scale */</span> |
| <a name="l00097"></a>00097 <span class="comment">/* Scale the input and then store the results in the destination buffer. */</span> |
| <a name="l00098"></a>00098 *pDst++ = (*pSrc++) * scale; |
| <a name="l00099"></a>00099 *pDst++ = (*pSrc++) * scale; |
| <a name="l00100"></a>00100 *pDst++ = (*pSrc++) * scale; |
| <a name="l00101"></a>00101 *pDst++ = (*pSrc++) * scale; |
| <a name="l00102"></a>00102 |
| <a name="l00103"></a>00103 <span class="comment">/* Decrement the loop counter */</span> |
| <a name="l00104"></a>00104 blkCnt--; |
| <a name="l00105"></a>00105 } |
| <a name="l00106"></a>00106 |
| <a name="l00107"></a>00107 <span class="comment">/* If the blockSize is not a multiple of 4, compute any remaining output samples here. </span> |
| <a name="l00108"></a>00108 <span class="comment"> ** No loop unrolling is used. */</span> |
| <a name="l00109"></a>00109 blkCnt = blockSize % 0x4u; |
| <a name="l00110"></a>00110 |
| <a name="l00111"></a>00111 <span class="preprocessor">#else</span> |
| <a name="l00112"></a>00112 <span class="preprocessor"></span> |
| <a name="l00113"></a>00113 <span class="comment">/* Run the below code for Cortex-M0 */</span> |
| <a name="l00114"></a>00114 |
| <a name="l00115"></a>00115 <span class="comment">/* Initialize blkCnt with number of samples */</span> |
| <a name="l00116"></a>00116 blkCnt = <a class="code" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>; |
| <a name="l00117"></a>00117 |
| <a name="l00118"></a>00118 <span class="preprocessor">#endif </span><span class="comment">/* #ifndef ARM_MATH_CM0 */</span> |
| <a name="l00119"></a>00119 |
| <a name="l00120"></a>00120 <span class="keywordflow">while</span>(blkCnt > 0u) |
| <a name="l00121"></a>00121 { |
| <a name="l00122"></a>00122 <span class="comment">/* C = A * scale */</span> |
| <a name="l00123"></a>00123 <span class="comment">/* Scale the input and then store the result in the destination buffer. */</span> |
| <a name="l00124"></a>00124 *pDst++ = (*pSrc++) * scale; |
| <a name="l00125"></a>00125 |
| <a name="l00126"></a>00126 <span class="comment">/* Decrement the loop counter */</span> |
| <a name="l00127"></a>00127 blkCnt--; |
| <a name="l00128"></a>00128 } |
| <a name="l00129"></a>00129 } |
| <a name="l00130"></a>00130 |
| </pre></div></div> |
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