361 lines
20 KiB
HTML
361 lines
20 KiB
HTML
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
|
|
<html xmlns="http://www.w3.org/1999/xhtml">
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
|
||
|
|
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
|
||
|
|
<title>Vector Dot Product</title>
|
||
|
|
<title>CMSIS-DSP: Vector Dot Product</title>
|
||
|
|
<link href="tabs.css" rel="stylesheet" type="text/css"/>
|
||
|
|
<link href="cmsis.css" rel="stylesheet" type="text/css" />
|
||
|
|
<script type="text/javascript" src="jquery.js"></script>
|
||
|
|
<script type="text/javascript" src="dynsections.js"></script>
|
||
|
|
<script type="text/javascript" src="printComponentTabs.js"></script>
|
||
|
|
<link href="navtree.css" rel="stylesheet" type="text/css"/>
|
||
|
|
<script type="text/javascript" src="resize.js"></script>
|
||
|
|
<script type="text/javascript" src="navtree.js"></script>
|
||
|
|
<script type="text/javascript">
|
||
|
|
$(document).ready(initResizable);
|
||
|
|
$(window).load(resizeHeight);
|
||
|
|
</script>
|
||
|
|
<link href="search/search.css" rel="stylesheet" type="text/css"/>
|
||
|
|
<script type="text/javascript" src="search/search.js"></script>
|
||
|
|
<script type="text/javascript">
|
||
|
|
$(document).ready(function() { searchBox.OnSelectItem(0); });
|
||
|
|
</script>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
|
||
|
|
<div id="titlearea">
|
||
|
|
<table cellspacing="0" cellpadding="0">
|
||
|
|
<tbody>
|
||
|
|
<tr style="height: 46px;">
|
||
|
|
<td id="projectlogo"><img alt="Logo" src="CMSIS_Logo_Final.png"/></td>
|
||
|
|
<td style="padding-left: 0.5em;">
|
||
|
|
<div id="projectname">CMSIS-DSP
|
||
|
|
 <span id="projectnumber">Version 1.5.1</span>
|
||
|
|
</div>
|
||
|
|
<div id="projectbrief">CMSIS DSP Software Library</div>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
</tbody>
|
||
|
|
</table>
|
||
|
|
</div>
|
||
|
|
<!-- end header part -->
|
||
|
|
<div id="CMSISnav" class="tabs1">
|
||
|
|
<ul class="tablist">
|
||
|
|
<script type="text/javascript">
|
||
|
|
<!--
|
||
|
|
writeComponentTabs.call(this);
|
||
|
|
//-->
|
||
|
|
</script>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
<!-- Generated by Doxygen 1.8.6 -->
|
||
|
|
<script type="text/javascript">
|
||
|
|
var searchBox = new SearchBox("searchBox", "search",false,'Search');
|
||
|
|
</script>
|
||
|
|
<div id="navrow1" class="tabs">
|
||
|
|
<ul class="tablist">
|
||
|
|
<li><a href="index.html"><span>Main Page</span></a></li>
|
||
|
|
<li><a href="pages.html"><span>Usage and Description</span></a></li>
|
||
|
|
<li><a href="modules.html"><span>Reference</span></a></li>
|
||
|
|
<li>
|
||
|
|
<div id="MSearchBox" class="MSearchBoxInactive">
|
||
|
|
<span class="left">
|
||
|
|
<img id="MSearchSelect" src="search/mag_sel.png"
|
||
|
|
onmouseover="return searchBox.OnSearchSelectShow()"
|
||
|
|
onmouseout="return searchBox.OnSearchSelectHide()"
|
||
|
|
alt=""/>
|
||
|
|
<input type="text" id="MSearchField" value="Search" accesskey="S"
|
||
|
|
onfocus="searchBox.OnSearchFieldFocus(true)"
|
||
|
|
onblur="searchBox.OnSearchFieldFocus(false)"
|
||
|
|
onkeyup="searchBox.OnSearchFieldChange(event)"/>
|
||
|
|
</span><span class="right">
|
||
|
|
<a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a>
|
||
|
|
</span>
|
||
|
|
</div>
|
||
|
|
</li>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
</div><!-- top -->
|
||
|
|
<div id="side-nav" class="ui-resizable side-nav-resizable">
|
||
|
|
<div id="nav-tree">
|
||
|
|
<div id="nav-tree-contents">
|
||
|
|
<div id="nav-sync" class="sync"></div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div id="splitbar" style="-moz-user-select:none;"
|
||
|
|
class="ui-resizable-handle">
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<script type="text/javascript">
|
||
|
|
$(document).ready(function(){initNavTree('group__dot__prod.html','');});
|
||
|
|
</script>
|
||
|
|
<div id="doc-content">
|
||
|
|
<!-- window showing the filter options -->
|
||
|
|
<div id="MSearchSelectWindow"
|
||
|
|
onmouseover="return searchBox.OnSearchSelectShow()"
|
||
|
|
onmouseout="return searchBox.OnSearchSelectHide()"
|
||
|
|
onkeydown="return searchBox.OnSearchSelectKey(event)">
|
||
|
|
<a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark"> </span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark"> </span>Data Structures</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark"> </span>Files</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark"> </span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark"> </span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark"> </span>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark"> </span>Enumerations</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark"> </span>Enumerator</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark"> </span>Macros</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(9)"><span class="SelectionMark"> </span>Groups</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(10)"><span class="SelectionMark"> </span>Pages</a></div>
|
||
|
|
|
||
|
|
<!-- iframe showing the search results (closed by default) -->
|
||
|
|
<div id="MSearchResultsWindow">
|
||
|
|
<iframe src="javascript:void(0)" frameborder="0"
|
||
|
|
name="MSearchResults" id="MSearchResults">
|
||
|
|
</iframe>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<div class="header">
|
||
|
|
<div class="summary">
|
||
|
|
<a href="#func-members">Functions</a> </div>
|
||
|
|
<div class="headertitle">
|
||
|
|
<div class="title">Vector Dot Product<div class="ingroups"><a class="el" href="group__groupMath.html">Basic Math Functions</a></div></div> </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:ga55418d4362f6ba84c327f9b4f089a8c3"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__dot__prod.html#ga55418d4362f6ba84c327f9b4f089a8c3">arm_dot_prod_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, uint32_t <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>, <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *result)</td></tr>
|
||
|
|
<tr class="memdesc:ga55418d4362f6ba84c327f9b4f089a8c3"><td class="mdescLeft"> </td><td class="mdescRight">Dot product of floating-point vectors. <a href="#ga55418d4362f6ba84c327f9b4f089a8c3">More...</a><br/></td></tr>
|
||
|
|
<tr class="separator:ga55418d4362f6ba84c327f9b4f089a8c3"><td class="memSeparator" colspan="2"> </td></tr>
|
||
|
|
<tr class="memitem:ga436d5bed28a4b73b24acbde436a3044b"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__dot__prod.html#ga436d5bed28a4b73b24acbde436a3044b">arm_dot_prod_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, uint32_t <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>, <a class="el" href="arm__math_8h.html#a5aea1cb12fc02d9d44c8abf217eaa5c6">q63_t</a> *result)</td></tr>
|
||
|
|
<tr class="memdesc:ga436d5bed28a4b73b24acbde436a3044b"><td class="mdescLeft"> </td><td class="mdescRight">Dot product of Q15 vectors. <a href="#ga436d5bed28a4b73b24acbde436a3044b">More...</a><br/></td></tr>
|
||
|
|
<tr class="separator:ga436d5bed28a4b73b24acbde436a3044b"><td class="memSeparator" colspan="2"> </td></tr>
|
||
|
|
<tr class="memitem:gab15d8fa060fc85b4d948d091b7deaa11"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__dot__prod.html#gab15d8fa060fc85b4d948d091b7deaa11">arm_dot_prod_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, uint32_t <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>, <a class="el" href="arm__math_8h.html#a5aea1cb12fc02d9d44c8abf217eaa5c6">q63_t</a> *result)</td></tr>
|
||
|
|
<tr class="memdesc:gab15d8fa060fc85b4d948d091b7deaa11"><td class="mdescLeft"> </td><td class="mdescRight">Dot product of Q31 vectors. <a href="#gab15d8fa060fc85b4d948d091b7deaa11">More...</a><br/></td></tr>
|
||
|
|
<tr class="separator:gab15d8fa060fc85b4d948d091b7deaa11"><td class="memSeparator" colspan="2"> </td></tr>
|
||
|
|
<tr class="memitem:ga9c3293a50ac7ec8ba928bf8e3aaea6c1"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__dot__prod.html#ga9c3293a50ac7ec8ba928bf8e3aaea6c1">arm_dot_prod_q7</a> (<a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_t</a> *pSrcA, <a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_t</a> *pSrcB, uint32_t <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>, <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *result)</td></tr>
|
||
|
|
<tr class="memdesc:ga9c3293a50ac7ec8ba928bf8e3aaea6c1"><td class="mdescLeft"> </td><td class="mdescRight">Dot product of Q7 vectors. <a href="#ga9c3293a50ac7ec8ba928bf8e3aaea6c1">More...</a><br/></td></tr>
|
||
|
|
<tr class="separator:ga9c3293a50ac7ec8ba928bf8e3aaea6c1"><td class="memSeparator" colspan="2"> </td></tr>
|
||
|
|
</table>
|
||
|
|
<a name="details" id="details"></a><h2 class="groupheader">Description</h2>
|
||
|
|
<p>Computes the dot product of two vectors. The vectors are multiplied element-by-element and then summed.</p>
|
||
|
|
<pre>
|
||
|
|
sum = pSrcA[0]*pSrcB[0] + pSrcA[1]*pSrcB[1] + ... + pSrcA[blockSize-1]*pSrcB[blockSize-1]
|
||
|
|
</pre><p>There are separate functions for floating-point, Q7, Q15, and Q31 data types. </p>
|
||
|
|
<h2 class="groupheader">Function Documentation</h2>
|
||
|
|
<a class="anchor" id="ga55418d4362f6ba84c327f9b4f089a8c3"></a>
|
||
|
|
<div class="memitem">
|
||
|
|
<div class="memproto">
|
||
|
|
<table class="memname">
|
||
|
|
<tr>
|
||
|
|
<td class="memname">void arm_dot_prod_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">uint32_t </td>
|
||
|
|
<td class="paramname"><em>blockSize</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>result</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">[in]</td><td class="paramname">blockSize</td><td>number of samples in each vector </td></tr>
|
||
|
|
<tr><td class="paramdir">[out]</td><td class="paramname">*result</td><td>output result returned here </td></tr>
|
||
|
|
</table>
|
||
|
|
</dd>
|
||
|
|
</dl>
|
||
|
|
<dl class="section return"><dt>Returns</dt><dd>none. </dd></dl>
|
||
|
|
|
||
|
|
<p>References <a class="el" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>.</p>
|
||
|
|
|
||
|
|
<p>Referenced by <a class="el" href="arm__variance__example__f32_8c.html#a52d2cba30e6946c95578be946ac12a65">main()</a>.</p>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<a class="anchor" id="ga436d5bed28a4b73b24acbde436a3044b"></a>
|
||
|
|
<div class="memitem">
|
||
|
|
<div class="memproto">
|
||
|
|
<table class="memname">
|
||
|
|
<tr>
|
||
|
|
<td class="memname">void arm_dot_prod_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">uint32_t </td>
|
||
|
|
<td class="paramname"><em>blockSize</em>, </td>
|
||
|
|
</tr>
|
||
|
|
<tr>
|
||
|
|
<td class="paramkey"></td>
|
||
|
|
<td></td>
|
||
|
|
<td class="paramtype"><a class="el" href="arm__math_8h.html#a5aea1cb12fc02d9d44c8abf217eaa5c6">q63_t</a> * </td>
|
||
|
|
<td class="paramname"><em>result</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">[in]</td><td class="paramname">blockSize</td><td>number of samples in each vector </td></tr>
|
||
|
|
<tr><td class="paramdir">[out]</td><td class="paramname">*result</td><td>output result returned here </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 intermediate multiplications are in 1.15 x 1.15 = 2.30 format and these results are added to a 64-bit accumulator in 34.30 format. Nonsaturating additions are used and given that there are 33 guard bits in the accumulator there is no risk of overflow. The return result is in 34.30 format. </dd></dl>
|
||
|
|
|
||
|
|
<p>References <a class="el" href="arm__math_8h.html#a9de2e0a5785be82866bcb96012282248">__SIMD32</a>, <a class="el" href="arm__math_8h.html#a7aed02041f489a4f65dbd7093073d94e">__SMLALD()</a>, and <a class="el" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>.</p>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<a class="anchor" id="gab15d8fa060fc85b4d948d091b7deaa11"></a>
|
||
|
|
<div class="memitem">
|
||
|
|
<div class="memproto">
|
||
|
|
<table class="memname">
|
||
|
|
<tr>
|
||
|
|
<td class="memname">void arm_dot_prod_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">uint32_t </td>
|
||
|
|
<td class="paramname"><em>blockSize</em>, </td>
|
||
|
|
</tr>
|
||
|
|
<tr>
|
||
|
|
<td class="paramkey"></td>
|
||
|
|
<td></td>
|
||
|
|
<td class="paramtype"><a class="el" href="arm__math_8h.html#a5aea1cb12fc02d9d44c8abf217eaa5c6">q63_t</a> * </td>
|
||
|
|
<td class="paramname"><em>result</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">[in]</td><td class="paramname">blockSize</td><td>number of samples in each vector </td></tr>
|
||
|
|
<tr><td class="paramdir">[out]</td><td class="paramname">*result</td><td>output result returned here </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 intermediate multiplications are in 1.31 x 1.31 = 2.62 format and these are truncated to 2.48 format by discarding the lower 14 bits. The 2.48 result is then added without saturation to a 64-bit accumulator in 16.48 format. There are 15 guard bits in the accumulator and there is no risk of overflow as long as the length of the vectors is less than 2^16 elements. The return result is in 16.48 format. </dd></dl>
|
||
|
|
|
||
|
|
<p>References <a class="el" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>.</p>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<a class="anchor" id="ga9c3293a50ac7ec8ba928bf8e3aaea6c1"></a>
|
||
|
|
<div class="memitem">
|
||
|
|
<div class="memproto">
|
||
|
|
<table class="memname">
|
||
|
|
<tr>
|
||
|
|
<td class="memname">void arm_dot_prod_q7 </td>
|
||
|
|
<td>(</td>
|
||
|
|
<td class="paramtype"><a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_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#ae541b6f232c305361e9b416fc9eed263">q7_t</a> * </td>
|
||
|
|
<td class="paramname"><em>pSrcB</em>, </td>
|
||
|
|
</tr>
|
||
|
|
<tr>
|
||
|
|
<td class="paramkey"></td>
|
||
|
|
<td></td>
|
||
|
|
<td class="paramtype">uint32_t </td>
|
||
|
|
<td class="paramname"><em>blockSize</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>result</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">[in]</td><td class="paramname">blockSize</td><td>number of samples in each vector </td></tr>
|
||
|
|
<tr><td class="paramdir">[out]</td><td class="paramname">*result</td><td>output result returned here </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 intermediate multiplications are in 1.7 x 1.7 = 2.14 format and these results are added to an accumulator in 18.14 format. Nonsaturating additions are used and there is no danger of wrap around as long as the vectors are less than 2^18 elements long. The return result is in 18.14 format. </dd></dl>
|
||
|
|
|
||
|
|
<p>References <a class="el" href="arm__math_8h.html#a9de2e0a5785be82866bcb96012282248">__SIMD32</a>, <a class="el" href="arm__math_8h.html#aa611fdbf6c56c46553701d6596a79aaf">__SMLAD()</a>, <a class="el" href="arm__math_8h.html#ac9f7f02a5e0ad5642026dbd0da7418db">__SXTB16()</a>, and <a class="el" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</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 Wed Feb 8 2017 10:20:51 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> 1.8.6
|
||
|
|
-->
|
||
|
|
</li>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|