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<div class="header">
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<a href="#func-members">Functions</a>  </div>
  <div class="headertitle">
<div class="title">Vector Subtraction</div>  </div>
<div class="ingroups"><a class="el" href="group__group_math.html">Basic Math Functions</a></div></div><!--header-->
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Functions</h2></td></tr>
<tr class="memitem:ga7f975a472de286331134227c08aad826"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___basic_sub.html#ga7f975a472de286331134227c08aad826">arm_sub_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 <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>)</td></tr>
<tr class="memdesc:ga7f975a472de286331134227c08aad826"><td class="mdescLeft">&#160;</td><td class="mdescRight">Floating-point vector subtraction.  <a href="#ga7f975a472de286331134227c08aad826"></a><br/></td></tr>
<tr class="separator:ga7f975a472de286331134227c08aad826"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga997a8ee93088d15bda23c325d455b588"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___basic_sub.html#ga997a8ee93088d15bda23c325d455b588">arm_sub_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 <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>)</td></tr>
<tr class="memdesc:ga997a8ee93088d15bda23c325d455b588"><td class="mdescLeft">&#160;</td><td class="mdescRight">Q15 vector subtraction.  <a href="#ga997a8ee93088d15bda23c325d455b588"></a><br/></td></tr>
<tr class="separator:ga997a8ee93088d15bda23c325d455b588"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga28aa6908d092752144413e21933dc878"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___basic_sub.html#ga28aa6908d092752144413e21933dc878">arm_sub_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 <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>)</td></tr>
<tr class="memdesc:ga28aa6908d092752144413e21933dc878"><td class="mdescLeft">&#160;</td><td class="mdescRight">Q31 vector subtraction.  <a href="#ga28aa6908d092752144413e21933dc878"></a><br/></td></tr>
<tr class="separator:ga28aa6908d092752144413e21933dc878"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gab09941de7dfeb247e5c29b406a435fcc"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___basic_sub.html#gab09941de7dfeb247e5c29b406a435fcc">arm_sub_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, <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:gab09941de7dfeb247e5c29b406a435fcc"><td class="mdescLeft">&#160;</td><td class="mdescRight">Q7 vector subtraction.  <a href="#gab09941de7dfeb247e5c29b406a435fcc"></a><br/></td></tr>
<tr class="separator:gab09941de7dfeb247e5c29b406a435fcc"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Description</h2>
<p>Element-by-element subtraction of two vectors.</p>
<pre>        
    pDst[n] = pSrcA[n] - pSrcB[n],   0 &lt;= n &lt; blockSize.        
</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="ga7f975a472de286331134227c08aad826"></a>
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          <td class="memname">void arm_sub_f32 </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *&#160;</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> *&#160;</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> *&#160;</td>
          <td class="paramname"><em>pDst</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint32_t&#160;</td>
          <td class="paramname"><em>blockSize</em>&#160;</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">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><dt><b>Examples: </b></dt><dd><a class="el" href="arm_signal_converge_example_f32_8c-example.html#a36">arm_signal_converge_example_f32.c</a>, and <a class="el" href="arm_variance_example_f32_8c-example.html#a14">arm_variance_example_f32.c</a>.</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__signal__converge__example__f32_8c.html#a52d2cba30e6946c95578be946ac12a65">main()</a>.</p>

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          <td class="memname">void arm_sub_q15 </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *&#160;</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> *&#160;</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> *&#160;</td>
          <td class="paramname"><em>pDst</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint32_t&#160;</td>
          <td class="paramname"><em>blockSize</em>&#160;</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">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>
<p><b>Scaling and Overflow Behavior:</b> </p>
<dl class="section user"><dt></dt><dd>The function uses saturating arithmetic. Results outside of the allowable Q15 range [0x8000 0x7FFF] will be saturated. </dd></dl>

<p>References <a class="el" href="arm__math_8h.html#a9de2e0a5785be82866bcb96012282248">__SIMD32</a>, and <a class="el" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>.</p>

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          <td class="memname">void arm_sub_q31 </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *&#160;</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> *&#160;</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> *&#160;</td>
          <td class="paramname"><em>pDst</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint32_t&#160;</td>
          <td class="paramname"><em>blockSize</em>&#160;</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">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>
<p><b>Scaling and Overflow Behavior:</b> </p>
<dl class="section user"><dt></dt><dd>The function uses saturating arithmetic. Results outside of the allowable Q31 range [0x80000000 0x7FFFFFFF] will be saturated. </dd></dl>

<p>References <a class="el" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>, and <a class="el" href="arm__math_8h.html#ad7373e53d3c2e1adfeafc8c2e9720b5c">clip_q63_to_q31()</a>.</p>

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<a class="anchor" id="gab09941de7dfeb247e5c29b406a435fcc"></a>
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          <td class="memname">void arm_sub_q7 </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_t</a> *&#160;</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> *&#160;</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#ae541b6f232c305361e9b416fc9eed263">q7_t</a> *&#160;</td>
          <td class="paramname"><em>pDst</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint32_t&#160;</td>
          <td class="paramname"><em>blockSize</em>&#160;</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">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>
<p><b>Scaling and Overflow Behavior:</b> </p>
<dl class="section user"><dt></dt><dd>The function uses saturating arithmetic. Results outside of the allowable Q7 range [0x80 0x7F] will be saturated. </dd></dl>

<p>References <a class="el" href="arm__math_8h.html#a9de2e0a5785be82866bcb96012282248">__SIMD32</a>, and <a class="el" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>.</p>

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