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| <h1>arm_cmplx_mag_squared_q31.c</h1> </div> |
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| <div class="contents"> |
| <a href="arm__cmplx__mag__squared__q31_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_mag_squared_q31.c </span> |
| <a name="l00009"></a>00009 <span class="comment">* </span> |
| <a name="l00010"></a>00010 <span class="comment">* Description: Q31 complex magnitude squared. </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="l00055"></a><a class="code" href="group__cmplx__mag__squared.html#ga384b0538101e8c03fa4fa14271e63b04">00055</a> <span class="keywordtype">void</span> <a class="code" href="group__cmplx__mag__squared.html#ga384b0538101e8c03fa4fa14271e63b04" title="Q31 complex magnitude squared.">arm_cmplx_mag_squared_q31</a>( |
| <a name="l00056"></a>00056 <a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a> * pSrc, |
| <a name="l00057"></a>00057 <a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a> * pDst, |
| <a name="l00058"></a>00058 uint32_t numSamples) |
| <a name="l00059"></a>00059 { |
| <a name="l00060"></a>00060 <a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a> real, imag; <span class="comment">/* Temporary variables to store real and imaginary values */</span> |
| <a name="l00061"></a>00061 <a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a> acc0, acc1; <span class="comment">/* Accumulators */</span> |
| <a name="l00062"></a>00062 |
| <a name="l00063"></a>00063 <span class="preprocessor">#ifndef ARM_MATH_CM0</span> |
| <a name="l00064"></a>00064 <span class="preprocessor"></span> |
| <a name="l00065"></a>00065 <span class="comment">/* Run the below code for Cortex-M4 and Cortex-M3 */</span> |
| <a name="l00066"></a>00066 uint32_t blkCnt; <span class="comment">/* loop counter */</span> |
| <a name="l00067"></a>00067 |
| <a name="l00068"></a>00068 <span class="comment">/* loop Unrolling */</span> |
| <a name="l00069"></a>00069 blkCnt = numSamples >> 2u; |
| <a name="l00070"></a>00070 |
| <a name="l00071"></a>00071 <span class="comment">/* First part of the processing with loop unrolling. Compute 4 outputs at a time. </span> |
| <a name="l00072"></a>00072 <span class="comment"> ** a second loop below computes the remaining 1 to 3 samples. */</span> |
| <a name="l00073"></a>00073 <span class="keywordflow">while</span>(blkCnt > 0u) |
| <a name="l00074"></a>00074 { |
| <a name="l00075"></a>00075 <span class="comment">/* C[0] = (A[0] * A[0] + A[1] * A[1]) */</span> |
| <a name="l00076"></a>00076 real = *pSrc++; |
| <a name="l00077"></a>00077 imag = *pSrc++; |
| <a name="l00078"></a>00078 acc0 = (<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) (((<a class="code" href="arm__math_8h.html#a5aea1cb12fc02d9d44c8abf217eaa5c6" title="64-bit fractional data type in 1.63 format.">q63_t</a>) real * real) >> 33); |
| <a name="l00079"></a>00079 acc1 = (<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) (((<a class="code" href="arm__math_8h.html#a5aea1cb12fc02d9d44c8abf217eaa5c6" title="64-bit fractional data type in 1.63 format.">q63_t</a>) imag * imag) >> 33); |
| <a name="l00080"></a>00080 <span class="comment">/* store the result in 3.29 format in the destination buffer. */</span> |
| <a name="l00081"></a>00081 *pDst++ = acc0 + acc1; |
| <a name="l00082"></a>00082 |
| <a name="l00083"></a>00083 real = *pSrc++; |
| <a name="l00084"></a>00084 imag = *pSrc++; |
| <a name="l00085"></a>00085 acc0 = (<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) (((<a class="code" href="arm__math_8h.html#a5aea1cb12fc02d9d44c8abf217eaa5c6" title="64-bit fractional data type in 1.63 format.">q63_t</a>) real * real) >> 33); |
| <a name="l00086"></a>00086 acc1 = (<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) (((<a class="code" href="arm__math_8h.html#a5aea1cb12fc02d9d44c8abf217eaa5c6" title="64-bit fractional data type in 1.63 format.">q63_t</a>) imag * imag) >> 33); |
| <a name="l00087"></a>00087 <span class="comment">/* store the result in 3.29 format in the destination buffer. */</span> |
| <a name="l00088"></a>00088 *pDst++ = acc0 + acc1; |
| <a name="l00089"></a>00089 |
| <a name="l00090"></a>00090 real = *pSrc++; |
| <a name="l00091"></a>00091 imag = *pSrc++; |
| <a name="l00092"></a>00092 acc0 = (<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) (((<a class="code" href="arm__math_8h.html#a5aea1cb12fc02d9d44c8abf217eaa5c6" title="64-bit fractional data type in 1.63 format.">q63_t</a>) real * real) >> 33); |
| <a name="l00093"></a>00093 acc1 = (<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) (((<a class="code" href="arm__math_8h.html#a5aea1cb12fc02d9d44c8abf217eaa5c6" title="64-bit fractional data type in 1.63 format.">q63_t</a>) imag * imag) >> 33); |
| <a name="l00094"></a>00094 <span class="comment">/* store the result in 3.29 format in the destination buffer. */</span> |
| <a name="l00095"></a>00095 *pDst++ = acc0 + acc1; |
| <a name="l00096"></a>00096 |
| <a name="l00097"></a>00097 real = *pSrc++; |
| <a name="l00098"></a>00098 imag = *pSrc++; |
| <a name="l00099"></a>00099 acc0 = (<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) (((<a class="code" href="arm__math_8h.html#a5aea1cb12fc02d9d44c8abf217eaa5c6" title="64-bit fractional data type in 1.63 format.">q63_t</a>) real * real) >> 33); |
| <a name="l00100"></a>00100 acc1 = (<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) (((<a class="code" href="arm__math_8h.html#a5aea1cb12fc02d9d44c8abf217eaa5c6" title="64-bit fractional data type in 1.63 format.">q63_t</a>) imag * imag) >> 33); |
| <a name="l00101"></a>00101 <span class="comment">/* store the result in 3.29 format in the destination buffer. */</span> |
| <a name="l00102"></a>00102 *pDst++ = acc0 + acc1; |
| <a name="l00103"></a>00103 |
| <a name="l00104"></a>00104 <span class="comment">/* Decrement the loop counter */</span> |
| <a name="l00105"></a>00105 blkCnt--; |
| <a name="l00106"></a>00106 } |
| <a name="l00107"></a>00107 |
| <a name="l00108"></a>00108 <span class="comment">/* If the numSamples is not a multiple of 4, compute any remaining output samples here. </span> |
| <a name="l00109"></a>00109 <span class="comment"> ** No loop unrolling is used. */</span> |
| <a name="l00110"></a>00110 blkCnt = numSamples % 0x4u; |
| <a name="l00111"></a>00111 |
| <a name="l00112"></a>00112 <span class="keywordflow">while</span>(blkCnt > 0u) |
| <a name="l00113"></a>00113 { |
| <a name="l00114"></a>00114 <span class="comment">/* C[0] = (A[0] * A[0] + A[1] * A[1]) */</span> |
| <a name="l00115"></a>00115 real = *pSrc++; |
| <a name="l00116"></a>00116 imag = *pSrc++; |
| <a name="l00117"></a>00117 acc0 = (<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) (((<a class="code" href="arm__math_8h.html#a5aea1cb12fc02d9d44c8abf217eaa5c6" title="64-bit fractional data type in 1.63 format.">q63_t</a>) real * real) >> 33); |
| <a name="l00118"></a>00118 acc1 = (<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) (((<a class="code" href="arm__math_8h.html#a5aea1cb12fc02d9d44c8abf217eaa5c6" title="64-bit fractional data type in 1.63 format.">q63_t</a>) imag * imag) >> 33); |
| <a name="l00119"></a>00119 <span class="comment">/* store the result in 3.29 format in the destination buffer. */</span> |
| <a name="l00120"></a>00120 *pDst++ = acc0 + acc1; |
| <a name="l00121"></a>00121 |
| <a name="l00122"></a>00122 <span class="comment">/* Decrement the loop counter */</span> |
| <a name="l00123"></a>00123 blkCnt--; |
| <a name="l00124"></a>00124 } |
| <a name="l00125"></a>00125 |
| <a name="l00126"></a>00126 <span class="preprocessor">#else</span> |
| <a name="l00127"></a>00127 <span class="preprocessor"></span> |
| <a name="l00128"></a>00128 <span class="comment">/* Run the below code for Cortex-M0 */</span> |
| <a name="l00129"></a>00129 |
| <a name="l00130"></a>00130 <span class="keywordflow">while</span>(numSamples > 0u) |
| <a name="l00131"></a>00131 { |
| <a name="l00132"></a>00132 <span class="comment">/* out = ((real * real) + (imag * imag)) */</span> |
| <a name="l00133"></a>00133 real = *pSrc++; |
| <a name="l00134"></a>00134 imag = *pSrc++; |
| <a name="l00135"></a>00135 acc0 = (<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) (((<a class="code" href="arm__math_8h.html#a5aea1cb12fc02d9d44c8abf217eaa5c6" title="64-bit fractional data type in 1.63 format.">q63_t</a>) real * real) >> 33); |
| <a name="l00136"></a>00136 acc1 = (<a class="code" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0" title="32-bit fractional data type in 1.31 format.">q31_t</a>) (((<a class="code" href="arm__math_8h.html#a5aea1cb12fc02d9d44c8abf217eaa5c6" title="64-bit fractional data type in 1.63 format.">q63_t</a>) imag * imag) >> 33); |
| <a name="l00137"></a>00137 <span class="comment">/* store the result in 3.29 format in the destination buffer. */</span> |
| <a name="l00138"></a>00138 *pDst++ = acc0 + acc1; |
| <a name="l00139"></a>00139 |
| <a name="l00140"></a>00140 <span class="comment">/* Decrement the loop counter */</span> |
| <a name="l00141"></a>00141 numSamples--; |
| <a name="l00142"></a>00142 } |
| <a name="l00143"></a>00143 |
| <a name="l00144"></a>00144 <span class="preprocessor">#endif </span><span class="comment">/* #ifndef ARM_MATH_CM0 */</span> |
| <a name="l00145"></a>00145 |
| <a name="l00146"></a>00146 } |
| <a name="l00147"></a>00147 |
| </pre></div></div> |
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