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| <h1>arm_cmplx_dot_prod_q15.c</h1> </div> |
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| <div class="contents"> |
| <a href="arm__cmplx__dot__prod__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_cmplx_dot_prod_q15.c </span> |
| <a name="l00009"></a>00009 <span class="comment">* </span> |
| <a name="l00010"></a>00010 <span class="comment">* Description: Processing function for the Q15 Complex Dot product </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 "<a class="code" href="arm__math_8h.html">arm_math.h</a>"</span> |
| <a name="l00031"></a>00031 |
| <a name="l00059"></a><a class="code" href="group__cmplx__dot__prod.html#ga2b08b5e8001d2c15204639d00893fc70">00059</a> <span class="keywordtype">void</span> <a class="code" href="group__cmplx__dot__prod.html#ga2b08b5e8001d2c15204639d00893fc70" title="Q15 complex dot product.">arm_cmplx_dot_prod_q15</a>( |
| <a name="l00060"></a>00060 <a class="code" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea" title="16-bit fractional data type in 1.15 format.">q15_t</a> * pSrcA, |
| <a name="l00061"></a>00061 <a class="code" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea" title="16-bit fractional data type in 1.15 format.">q15_t</a> * pSrcB, |
| <a name="l00062"></a>00062 uint32_t numSamples, |
| <a name="l00063"></a>00063 <a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a> * realResult, |
| <a name="l00064"></a>00064 <a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a> * imagResult) |
| <a name="l00065"></a>00065 { |
| <a name="l00066"></a>00066 <a class="code" href="arm__math_8h.html#a5aea1cb12fc02d9d44c8abf217eaa5c6" title="64-bit fractional data type in 1.63 format.">q63_t</a> real_sum = 0, imag_sum = 0; <span class="comment">/* Temporary result storage */</span> |
| <a name="l00067"></a>00067 |
| <a name="l00068"></a>00068 <span class="preprocessor">#ifndef ARM_MATH_CM0</span> |
| <a name="l00069"></a>00069 <span class="preprocessor"></span> |
| <a name="l00070"></a>00070 <span class="comment">/* Run the below code for Cortex-M4 and Cortex-M3 */</span> |
| <a name="l00071"></a>00071 uint32_t blkCnt; <span class="comment">/* loop counter */</span> |
| <a name="l00072"></a>00072 |
| <a name="l00073"></a>00073 |
| <a name="l00074"></a>00074 <span class="comment">/*loop Unrolling */</span> |
| <a name="l00075"></a>00075 blkCnt = numSamples >> 2u; |
| <a name="l00076"></a>00076 |
| <a name="l00077"></a>00077 <span class="comment">/* First part of the processing with loop unrolling. Compute 4 outputs at a time. </span> |
| <a name="l00078"></a>00078 <span class="comment"> ** a second loop below computes the remaining 1 to 3 samples. */</span> |
| <a name="l00079"></a>00079 <span class="keywordflow">while</span>(blkCnt > 0u) |
| <a name="l00080"></a>00080 { |
| <a name="l00081"></a>00081 <span class="comment">/* CReal = A[0]* B[0] + A[2]* B[2] + A[4]* B[4] + .....+ A[numSamples-2]* B[numSamples-2] */</span> |
| <a name="l00082"></a>00082 real_sum += ((<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) * pSrcA++ * *pSrcB++); |
| <a name="l00083"></a>00083 |
| <a name="l00084"></a>00084 <span class="comment">/* CImag = A[1]* B[1] + A[3]* B[3] + A[5]* B[5] + .....+ A[numSamples-1]* B[numSamples-1] */</span> |
| <a name="l00085"></a>00085 imag_sum += ((<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) * pSrcA++ * *pSrcB++); |
| <a name="l00086"></a>00086 |
| <a name="l00087"></a>00087 real_sum += ((<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) * pSrcA++ * *pSrcB++); |
| <a name="l00088"></a>00088 imag_sum += ((<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) * pSrcA++ * *pSrcB++); |
| <a name="l00089"></a>00089 |
| <a name="l00090"></a>00090 real_sum += ((<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) * pSrcA++ * *pSrcB++); |
| <a name="l00091"></a>00091 imag_sum += ((<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) * pSrcA++ * *pSrcB++); |
| <a name="l00092"></a>00092 |
| <a name="l00093"></a>00093 real_sum += ((<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) * pSrcA++ * *pSrcB++); |
| <a name="l00094"></a>00094 imag_sum += ((<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) * pSrcA++ * *pSrcB++); |
| <a name="l00095"></a>00095 |
| <a name="l00096"></a>00096 <span class="comment">/* Decrement the loop counter */</span> |
| <a name="l00097"></a>00097 blkCnt--; |
| <a name="l00098"></a>00098 } |
| <a name="l00099"></a>00099 |
| <a name="l00100"></a>00100 <span class="comment">/* If the numSamples is not a multiple of 4, compute any remaining output samples here. </span> |
| <a name="l00101"></a>00101 <span class="comment"> ** No loop unrolling is used. */</span> |
| <a name="l00102"></a>00102 blkCnt = numSamples % 0x4u; |
| <a name="l00103"></a>00103 |
| <a name="l00104"></a>00104 <span class="keywordflow">while</span>(blkCnt > 0u) |
| <a name="l00105"></a>00105 { |
| <a name="l00106"></a>00106 <span class="comment">/* CReal = A[0]* B[0] + A[2]* B[2] + A[4]* B[4] + .....+ A[numSamples-2]* B[numSamples-2] */</span> |
| <a name="l00107"></a>00107 real_sum += ((<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) * pSrcA++ * *pSrcB++); |
| <a name="l00108"></a>00108 <span class="comment">/* CImag = A[1]* B[1] + A[3]* B[3] + A[5]* B[5] + .....+ A[numSamples-1]* B[numSamples-1] */</span> |
| <a name="l00109"></a>00109 imag_sum += ((<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) * pSrcA++ * *pSrcB++); |
| <a name="l00110"></a>00110 |
| <a name="l00111"></a>00111 <span class="comment">/* Decrement the loop counter */</span> |
| <a name="l00112"></a>00112 blkCnt--; |
| <a name="l00113"></a>00113 } |
| <a name="l00114"></a>00114 |
| <a name="l00115"></a>00115 <span class="preprocessor">#else</span> |
| <a name="l00116"></a>00116 <span class="preprocessor"></span> |
| <a name="l00117"></a>00117 <span class="comment">/* Run the below code for Cortex-M0 */</span> |
| <a name="l00118"></a>00118 |
| <a name="l00119"></a>00119 <span class="keywordflow">while</span>(numSamples > 0u) |
| <a name="l00120"></a>00120 { |
| <a name="l00121"></a>00121 <span class="comment">/* CReal = A[0]* B[0] + A[2]* B[2] + A[4]* B[4] + .....+ A[numSamples-2]* B[numSamples-2] */</span> |
| <a name="l00122"></a>00122 real_sum += ((<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) * pSrcA++ * *pSrcB++); |
| <a name="l00123"></a>00123 <span class="comment">/* CImag = A[1]* B[1] + A[3]* B[3] + A[5]* B[5] + .....+ A[numSamples-1]* B[numSamples-1] */</span> |
| <a name="l00124"></a>00124 imag_sum += ((<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) * pSrcA++ * *pSrcB++); |
| <a name="l00125"></a>00125 |
| <a name="l00126"></a>00126 <span class="comment">/* Decrement the loop counter */</span> |
| <a name="l00127"></a>00127 numSamples--; |
| <a name="l00128"></a>00128 } |
| <a name="l00129"></a>00129 |
| <a name="l00130"></a>00130 <span class="preprocessor">#endif </span><span class="comment">/* #ifndef ARM_MATH_CM0 */</span> |
| <a name="l00131"></a>00131 |
| <a name="l00132"></a>00132 <span class="comment">/* Store the real and imaginary results in 8.24 format */</span> |
| <a name="l00133"></a>00133 <span class="comment">/* Convert real data in 34.30 to 8.24 by 6 right shifts */</span> |
| <a name="l00134"></a>00134 *realResult = (<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) (real_sum) >> 6; |
| <a name="l00135"></a>00135 <span class="comment">/* Convert imaginary data in 34.30 to 8.24 by 6 right shifts */</span> |
| <a name="l00136"></a>00136 *imagResult = (<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) (imag_sum) >> 6; |
| <a name="l00137"></a>00137 } |
| <a name="l00138"></a>00138 |
| </pre></div></div> |
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