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class="ingroups"><a class="el" href="group__group_cmplx_math.html">Complex Math Functions</a></div></div><!--header--> +<div class="contents"> +<table class="memberdecls"> +<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a> +Functions</h2></td></tr> +<tr class="memitem:ga14b47080054a1ba1250a86805be1ff6b"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___cmplx_by_cmplx_mult.html#ga14b47080054a1ba1250a86805be1ff6b">arm_cmplx_mult_cmplx_f32</a> (<a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *pSrcA, <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *pSrcB, <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *pDst, uint32_t numSamples)</td></tr> +<tr class="memdesc:ga14b47080054a1ba1250a86805be1ff6b"><td class="mdescLeft"> </td><td class="mdescRight">Floating-point complex-by-complex multiplication. <a href="#ga14b47080054a1ba1250a86805be1ff6b"></a><br/></td></tr> +<tr class="separator:ga14b47080054a1ba1250a86805be1ff6b"><td class="memSeparator" colspan="2"> </td></tr> +<tr class="memitem:ga67e96abfc9c3e30efb70a2ec9d0fe7e8"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___cmplx_by_cmplx_mult.html#ga67e96abfc9c3e30efb70a2ec9d0fe7e8">arm_cmplx_mult_cmplx_q15</a> (<a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pSrcA, <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pSrcB, <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pDst, uint32_t numSamples)</td></tr> +<tr class="memdesc:ga67e96abfc9c3e30efb70a2ec9d0fe7e8"><td class="mdescLeft"> </td><td class="mdescRight">Q15 complex-by-complex multiplication. <a href="#ga67e96abfc9c3e30efb70a2ec9d0fe7e8"></a><br/></td></tr> +<tr class="separator:ga67e96abfc9c3e30efb70a2ec9d0fe7e8"><td class="memSeparator" colspan="2"> </td></tr> +<tr class="memitem:ga1829e50993a90742de225a0ce4213838"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___cmplx_by_cmplx_mult.html#ga1829e50993a90742de225a0ce4213838">arm_cmplx_mult_cmplx_q31</a> (<a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pSrcA, <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pSrcB, <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pDst, uint32_t numSamples)</td></tr> +<tr class="memdesc:ga1829e50993a90742de225a0ce4213838"><td class="mdescLeft"> </td><td class="mdescRight">Q31 complex-by-complex multiplication. <a href="#ga1829e50993a90742de225a0ce4213838"></a><br/></td></tr> +<tr class="separator:ga1829e50993a90742de225a0ce4213838"><td class="memSeparator" colspan="2"> </td></tr> +</table> +<a name="details" id="details"></a><h2 class="groupheader">Description</h2> +<p>Multiplies a complex vector by another complex vector and generates a complex result. The data in the complex arrays is stored in an interleaved fashion (real, imag, real, imag, ...). The parameter <code>numSamples</code> represents the number of complex samples processed. The complex arrays have a total of <code>2*numSamples</code> real values.</p> +<p>The underlying algorithm is used:</p> +<pre> +for(n=0; n<numSamples; n++) { + pDst[(2*n)+0] = pSrcA[(2*n)+0] * pSrcB[(2*n)+0] - pSrcA[(2*n)+1] * pSrcB[(2*n)+1]; + pDst[(2*n)+1] = pSrcA[(2*n)+0] * pSrcB[(2*n)+1] + pSrcA[(2*n)+1] * pSrcB[(2*n)+0]; +} +</pre><p>There are separate functions for floating-point, Q15, and Q31 data types. </p> +<h2 class="groupheader">Function Documentation</h2> +<a class="anchor" id="ga14b47080054a1ba1250a86805be1ff6b"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">void arm_cmplx_mult_cmplx_f32 </td> + <td>(</td> + <td class="paramtype"><a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> * </td> + <td class="paramname"><em>pSrcA</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype"><a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> * </td> + <td class="paramname"><em>pSrcB</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype"><a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> * </td> + <td class="paramname"><em>pDst</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype">uint32_t </td> + <td class="paramname"><em>numSamples</em> </td> + </tr> + <tr> + <td></td> + <td>)</td> + <td></td><td></td> + </tr> + </table> +</div><div class="memdoc"> +<dl class="params"><dt>Parameters</dt><dd> + <table class="params"> + <tr><td class="paramdir">[in]</td><td class="paramname">*pSrcA</td><td>points to the first input vector </td></tr> + <tr><td class="paramdir">[in]</td><td class="paramname">*pSrcB</td><td>points to the second input vector </td></tr> + <tr><td class="paramdir">[out]</td><td class="paramname">*pDst</td><td>points to the output vector </td></tr> + <tr><td class="paramdir">[in]</td><td class="paramname">numSamples</td><td>number of complex samples in each vector </td></tr> + </table> + </dd> +</dl> +<dl class="section return"><dt>Returns</dt><dd>none. </dd></dl> +<dl><dt><b>Examples: </b></dt><dd><a class="el" href="arm_convolution_example_f32_8c-example.html#a18">arm_convolution_example_f32.c</a>.</dd> +</dl> +<p>Referenced by <a class="el" href="_a_r_m_2arm__convolution__example__f32_8c.html#a52d2cba30e6946c95578be946ac12a65">main()</a>.</p> + +</div> +</div> +<a class="anchor" id="ga67e96abfc9c3e30efb70a2ec9d0fe7e8"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">void arm_cmplx_mult_cmplx_q15 </td> + <td>(</td> + <td class="paramtype"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> * </td> + <td class="paramname"><em>pSrcA</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> * </td> + <td class="paramname"><em>pSrcB</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> * </td> + <td class="paramname"><em>pDst</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype">uint32_t </td> + <td class="paramname"><em>numSamples</em> </td> + </tr> + <tr> + <td></td> + <td>)</td> + <td></td><td></td> + </tr> + </table> +</div><div class="memdoc"> +<dl class="params"><dt>Parameters</dt><dd> + <table class="params"> + <tr><td class="paramdir">[in]</td><td class="paramname">*pSrcA</td><td>points to the first input vector </td></tr> + <tr><td class="paramdir">[in]</td><td class="paramname">*pSrcB</td><td>points to the second input vector </td></tr> + <tr><td class="paramdir">[out]</td><td class="paramname">*pDst</td><td>points to the output vector </td></tr> + <tr><td class="paramdir">[in]</td><td class="paramname">numSamples</td><td>number of complex samples in each vector </td></tr> + </table> + </dd> +</dl> +<dl class="section return"><dt>Returns</dt><dd>none.</dd></dl> +<p><b>Scaling and Overflow Behavior:</b> </p> +<dl class="section user"><dt></dt><dd>The function implements 1.15 by 1.15 multiplications and finally output is converted into 3.13 format. </dd></dl> + +</div> +</div> +<a class="anchor" id="ga1829e50993a90742de225a0ce4213838"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">void arm_cmplx_mult_cmplx_q31 </td> + <td>(</td> + <td class="paramtype"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> * </td> + <td class="paramname"><em>pSrcA</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> * </td> + <td class="paramname"><em>pSrcB</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> * </td> + <td class="paramname"><em>pDst</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype">uint32_t </td> + <td class="paramname"><em>numSamples</em> </td> + </tr> + <tr> + <td></td> + <td>)</td> + <td></td><td></td> + </tr> + </table> +</div><div class="memdoc"> +<dl class="params"><dt>Parameters</dt><dd> + <table class="params"> + <tr><td class="paramdir">[in]</td><td class="paramname">*pSrcA</td><td>points to the first input vector </td></tr> + <tr><td class="paramdir">[in]</td><td class="paramname">*pSrcB</td><td>points to the second input vector </td></tr> + <tr><td class="paramdir">[out]</td><td class="paramname">*pDst</td><td>points to the output vector </td></tr> + <tr><td class="paramdir">[in]</td><td class="paramname">numSamples</td><td>number of complex samples in each vector </td></tr> + </table> + </dd> +</dl> +<dl class="section return"><dt>Returns</dt><dd>none.</dd></dl> +<p><b>Scaling and Overflow Behavior:</b> </p> +<dl class="section user"><dt></dt><dd>The function implements 1.31 by 1.31 multiplications and finally output is converted into 3.29 format. Input down scaling is not required. </dd></dl> + +<p>Referenced by <a class="el" href="group___d_c_t4___i_d_c_t4.html#gad04d0baab6ed081d8e8afe02538eb80b">arm_dct4_q31()</a>.</p> + +</div> +</div> +</div><!-- contents --> +</div><!-- doc-content --> +<!-- start footer part --> +<div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> + <ul> + <li class="footer">Generated on Tue Oct 27 2015 14:35:33 for CMSIS-DSP by ARM Ltd. All rights reserved. + <!-- + <a href="http://www.doxygen.org/index.html"> + <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.2 + --> + </li> + </ul> +</div> +</body> +</html> |