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| author | rihab kouki <rihab.kouki@st.com> | 2020-07-28 11:24:49 +0100 |
|---|---|---|
| committer | rihab kouki <rihab.kouki@st.com> | 2020-07-28 11:24:49 +0100 |
| commit | 96d6da4e252b06dcfdc041e7df23e86161c33007 (patch) | |
| tree | a262f59bb1db7ec7819acae435f5049cbe5e2354 /docs/DSP/html/group__BasicScale.html | |
| parent | 9f95ff5b6ba01db09552b84a0ab79607060a2666 (diff) | |
| download | st-cmsis-core-lowfat-master.tar.gz st-cmsis-core-lowfat-master.tar.bz2 st-cmsis-core-lowfat-master.zip | |
Diffstat (limited to 'docs/DSP/html/group__BasicScale.html')
| -rw-r--r-- | docs/DSP/html/group__BasicScale.html | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/docs/DSP/html/group__BasicScale.html b/docs/DSP/html/group__BasicScale.html new file mode 100644 index 0000000..1b016d6 --- /dev/null +++ b/docs/DSP/html/group__BasicScale.html @@ -0,0 +1,374 @@ +<!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 Scale</title> +<title>CMSIS-DSP: Vector Scale</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" 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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" 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name="func-members"></a> +Functions</h2></td></tr> +<tr class="memitem:ga5e769c8e22da173674c6abca7291e713"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__BasicScale.html#ga5e769c8e22da173674c6abca7291e713">arm_scale_f32</a> (const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *pSrc, <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> scale, <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *pDst, uint32_t <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>)</td></tr> +<tr class="memdesc:ga5e769c8e22da173674c6abca7291e713"><td class="mdescLeft"> </td><td class="mdescRight">Multiplies a floating-point vector by a scalar. <a href="#ga5e769c8e22da173674c6abca7291e713">More...</a><br/></td></tr> +<tr class="separator:ga5e769c8e22da173674c6abca7291e713"><td class="memSeparator" colspan="2"> </td></tr> +<tr class="memitem:ga4663809f04249df5ea186ea09335e687"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__BasicScale.html#ga4663809f04249df5ea186ea09335e687">arm_scale_q15</a> (const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pSrc, <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> scaleFract, int8_t shift, <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pDst, uint32_t <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>)</td></tr> +<tr class="memdesc:ga4663809f04249df5ea186ea09335e687"><td class="mdescLeft"> </td><td class="mdescRight">Multiplies a Q15 vector by a scalar. <a href="#ga4663809f04249df5ea186ea09335e687">More...</a><br/></td></tr> +<tr class="separator:ga4663809f04249df5ea186ea09335e687"><td class="memSeparator" colspan="2"> </td></tr> +<tr class="memitem:ga8b2b6ea2e39ca464e8f2cfdd937c022b"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__BasicScale.html#ga8b2b6ea2e39ca464e8f2cfdd937c022b">arm_scale_q31</a> (const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pSrc, <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> scaleFract, int8_t shift, <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pDst, uint32_t <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>)</td></tr> +<tr class="memdesc:ga8b2b6ea2e39ca464e8f2cfdd937c022b"><td class="mdescLeft"> </td><td class="mdescRight">Multiplies a Q31 vector by a scalar. <a href="#ga8b2b6ea2e39ca464e8f2cfdd937c022b">More...</a><br/></td></tr> +<tr class="separator:ga8b2b6ea2e39ca464e8f2cfdd937c022b"><td class="memSeparator" colspan="2"> </td></tr> +<tr class="memitem:ga0d135086c6b813251b47a0d127b75eb8"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__BasicScale.html#ga0d135086c6b813251b47a0d127b75eb8">arm_scale_q7</a> (const <a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_t</a> *pSrc, <a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_t</a> scaleFract, int8_t shift, <a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_t</a> *pDst, uint32_t <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>)</td></tr> +<tr class="memdesc:ga0d135086c6b813251b47a0d127b75eb8"><td class="mdescLeft"> </td><td class="mdescRight">Multiplies a Q7 vector by a scalar. <a href="#ga0d135086c6b813251b47a0d127b75eb8">More...</a><br/></td></tr> +<tr class="separator:ga0d135086c6b813251b47a0d127b75eb8"><td class="memSeparator" colspan="2"> </td></tr> +</table> +<a name="details" id="details"></a><h2 class="groupheader">Description</h2> +<p>Multiply a vector by a scalar value. For floating-point data, the algorithm used is:</p> +<pre> + pDst[n] = pSrc[n] * scale, 0 <= n < blockSize. +</pre><p>In the fixed-point Q7, Q15, and Q31 functions, <code>scale</code> is represented by a fractional multiplication <code>scaleFract</code> and an arithmetic shift <code>shift</code>. The shift allows the gain of the scaling operation to exceed 1.0. The algorithm used with fixed-point data is:</p> +<pre> + pDst[n] = (pSrc[n] * scaleFract) << shift, 0 <= n < blockSize. +</pre><p>The overall scale factor applied to the fixed-point data is </p> +<pre> + scale = scaleFract * 2^shift. +</pre><p>The functions support in-place computation allowing the source and destination pointers to reference the same memory buffer. </p> +<h2 class="groupheader">Function Documentation</h2> +<a class="anchor" id="ga5e769c8e22da173674c6abca7291e713"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">void arm_scale_f32 </td> + <td>(</td> + <td class="paramtype">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> * </td> + <td class="paramname"><em>pSrc</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>scale</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>blockSize</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">pSrc</td><td>points to the input vector </td></tr> + <tr><td class="paramdir">[in]</td><td class="paramname">scale</td><td>scale factor to be applied </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">blockSize</td><td>number of samples in each vector </td></tr> + </table> + </dd> +</dl> +<dl class="section return"><dt>Returns</dt><dd>none </dd></dl> + +</div> +</div> +<a class="anchor" id="ga4663809f04249df5ea186ea09335e687"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">void arm_scale_q15 </td> + <td>(</td> + <td class="paramtype">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> * </td> + <td class="paramname"><em>pSrc</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>scaleFract</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype">int8_t </td> + <td class="paramname"><em>shift</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>blockSize</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">pSrc</td><td>points to the input vector </td></tr> + <tr><td class="paramdir">[in]</td><td class="paramname">scaleFract</td><td>fractional portion of the scale value </td></tr> + <tr><td class="paramdir">[in]</td><td class="paramname">shift</td><td>number of bits to shift the result by </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">blockSize</td><td>number of samples in each vector </td></tr> + </table> + </dd> +</dl> +<dl class="section return"><dt>Returns</dt><dd>none</dd></dl> +<dl class="section user"><dt>Scaling and Overflow Behavior</dt><dd>The input data <code>*pSrc</code> and <code>scaleFract</code> are in 1.15 format. These are multiplied to yield a 2.30 intermediate result and this is shifted with saturation to 1.15 format. </dd></dl> + +</div> +</div> +<a class="anchor" id="ga8b2b6ea2e39ca464e8f2cfdd937c022b"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">void arm_scale_q31 </td> + <td>(</td> + <td class="paramtype">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> * </td> + <td class="paramname"><em>pSrc</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>scaleFract</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype">int8_t </td> + <td class="paramname"><em>shift</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>blockSize</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">pSrc</td><td>points to the input vector </td></tr> + <tr><td class="paramdir">[in]</td><td class="paramname">scaleFract</td><td>fractional portion of the scale value </td></tr> + <tr><td class="paramdir">[in]</td><td class="paramname">shift</td><td>number of bits to shift the result by </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">blockSize</td><td>number of samples in each vector </td></tr> + </table> + </dd> +</dl> +<dl class="section return"><dt>Returns</dt><dd>none</dd></dl> +<dl class="section user"><dt>Scaling and Overflow Behavior</dt><dd>The input data <code>*pSrc</code> and <code>scaleFract</code> are in 1.31 format. These are multiplied to yield a 2.62 intermediate result and this is shifted with saturation to 1.31 format. </dd></dl> + +</div> +</div> +<a class="anchor" id="ga0d135086c6b813251b47a0d127b75eb8"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">void arm_scale_q7 </td> + <td>(</td> + <td class="paramtype">const <a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_t</a> * </td> + <td class="paramname"><em>pSrc</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>scaleFract</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype">int8_t </td> + <td class="paramname"><em>shift</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>pDst</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></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">pSrc</td><td>points to the input vector </td></tr> + <tr><td class="paramdir">[in]</td><td class="paramname">scaleFract</td><td>fractional portion of the scale value </td></tr> + <tr><td class="paramdir">[in]</td><td class="paramname">shift</td><td>number of bits to shift the result by </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">blockSize</td><td>number of samples in each vector </td></tr> + </table> + </dd> +</dl> +<dl class="section return"><dt>Returns</dt><dd>none</dd></dl> +<dl class="section user"><dt>Scaling and Overflow Behavior</dt><dd>The input data <code>*pSrc</code> and <code>scaleFract</code> are in 1.7 format. These are multiplied to yield a 2.14 intermediate result and this is shifted with saturation to 1.7 format. </dd></dl> + +</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 Jul 10 2019 15:20:39 for CMSIS-DSP Version 1.7.0 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> |