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<a href="#func-members">Functions</a>  </div>
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<div class="title">arm_cfft_radix4_q31.c File Reference</div>  </div>
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Functions</h2></td></tr>
<tr class="memitem:ac9c7c553114c1201a3a987a11b8a6d01"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="arm__cfft__radix4__q31_8c.html#ac9c7c553114c1201a3a987a11b8a6d01">arm_radix4_butterfly_inverse_q31</a> (<a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pSrc, uint32_t fftLen, <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pCoef, uint32_t twidCoefModifier)</td></tr>
<tr class="memdesc:ac9c7c553114c1201a3a987a11b8a6d01"><td class="mdescLeft">&#160;</td><td class="mdescRight">Core function for the Q31 CIFFT butterfly process.  <a href="#ac9c7c553114c1201a3a987a11b8a6d01"></a><br/></td></tr>
<tr class="separator:ac9c7c553114c1201a3a987a11b8a6d01"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ac12f1e7f159d5741358cdc36830a0395"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="arm__cfft__radix4__q31_8c.html#ac12f1e7f159d5741358cdc36830a0395">arm_radix4_butterfly_q31</a> (<a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pSrc, uint32_t fftLen, <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pCoef, uint32_t twidCoefModifier)</td></tr>
<tr class="memdesc:ac12f1e7f159d5741358cdc36830a0395"><td class="mdescLeft">&#160;</td><td class="mdescRight">Core function for the Q31 CFFT butterfly process.  <a href="#ac12f1e7f159d5741358cdc36830a0395"></a><br/></td></tr>
<tr class="separator:ac12f1e7f159d5741358cdc36830a0395"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a3fab577d25c3a517973c8c214f66f268"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="arm__cfft__radix4__q31_8c.html#a3fab577d25c3a517973c8c214f66f268">arm_bitreversal_q31</a> (<a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pSrc, uint32_t fftLen, uint16_t bitRevFactor, uint16_t *pBitRevTab)</td></tr>
<tr class="separator:a3fab577d25c3a517973c8c214f66f268"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gafde3ee1f58cf393b45a9073174fff548"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___complex_f_f_t.html#gafde3ee1f58cf393b45a9073174fff548">arm_cfft_radix4_q31</a> (const <a class="el" href="structarm__cfft__radix4__instance__q31.html">arm_cfft_radix4_instance_q31</a> *S, <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pSrc)</td></tr>
<tr class="memdesc:gafde3ee1f58cf393b45a9073174fff548"><td class="mdescLeft">&#160;</td><td class="mdescRight">Processing function for the Q31 CFFT/CIFFT.  <a href="group___complex_f_f_t.html#gafde3ee1f58cf393b45a9073174fff548"></a><br/></td></tr>
<tr class="separator:gafde3ee1f58cf393b45a9073174fff548"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<h2 class="groupheader">Function Documentation</h2>
<a class="anchor" id="a3fab577d25c3a517973c8c214f66f268"></a>
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          <td class="memname">void arm_bitreversal_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>pSrc</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint32_t&#160;</td>
          <td class="paramname"><em>fftLen</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint16_t&#160;</td>
          <td class="paramname"><em>bitRevFactor</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint16_t *&#160;</td>
          <td class="paramname"><em>pBitRevTab</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga6321f703ec87a274aedaab33d3e766b4">arm_cfft_radix2_q31()</a>, and <a class="el" href="group___complex_f_f_t.html#gafde3ee1f58cf393b45a9073174fff548">arm_cfft_radix4_q31()</a>.</p>

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          <td class="memname">void arm_radix4_butterfly_inverse_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>pSrc</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint32_t&#160;</td>
          <td class="paramname"><em>fftLen</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>pCoef</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint32_t&#160;</td>
          <td class="paramname"><em>twidCoefModifier</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,out]</td><td class="paramname">*pSrc</td><td>points to the in-place buffer of Q31 data type. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">fftLen</td><td>length of the FFT. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">*pCoef</td><td>points to twiddle coefficient buffer. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">twidCoefModifier</td><td>twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>none. </dd></dl>

<p>References <a class="el" href="arm__math_8h.html#ad1b053da364f9fd82ca1a381df7590b6">__SIMD64</a>.</p>

<p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga5a0008bd997ab6e2e299ef2fb272fb4b">arm_cfft_q31()</a>, <a class="el" href="group___complex_f_f_t.html#gafde3ee1f58cf393b45a9073174fff548">arm_cfft_radix4_q31()</a>, and <a class="el" href="arm__cfft__q31_8c.html#a3f3ae10bc2057cc1360abfa25f224c8c">arm_cfft_radix4by2_inverse_q31()</a>.</p>

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          <td class="memname">void arm_radix4_butterfly_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>pSrc</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint32_t&#160;</td>
          <td class="paramname"><em>fftLen</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>pCoef</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint32_t&#160;</td>
          <td class="paramname"><em>twidCoefModifier</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">
<p>end of ComplexFFT group </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in,out]</td><td class="paramname">*pSrc</td><td>points to the in-place buffer of Q31 data type. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">fftLen</td><td>length of the FFT. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">*pCoef</td><td>points to twiddle coefficient buffer. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">twidCoefModifier</td><td>twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>none. </dd></dl>

<p>References <a class="el" href="arm__math_8h.html#ad1b053da364f9fd82ca1a381df7590b6">__SIMD64</a>.</p>

<p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga5a0008bd997ab6e2e299ef2fb272fb4b">arm_cfft_q31()</a>, <a class="el" href="group___complex_f_f_t.html#gafde3ee1f58cf393b45a9073174fff548">arm_cfft_radix4_q31()</a>, and <a class="el" href="arm__cfft__q31_8c.html#af6df8bf714c30d44e6b871ea87d22b30">arm_cfft_radix4by2_q31()</a>.</p>

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