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  5. <title>CMSIS DSP Software Library: Convert 32-bit Integer value</title>
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  45. <a href="#func-members">Functions</a>  </div>
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  46.   <div class="headertitle">
    47. 

  47. <h1>Convert 32-bit Integer value<br/>
    48. 

  48. <small>
    49. 

  49. [<a class="el" href="group__group_support.html">Support Functions</a>]</small>
    50. 

  50. </h1>  </div>
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  51. </div>
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  52. <div class="contents">
    53. 

  53. <table class="memberdecls">
    54. 

  54. <tr><td colspan="2"><h2><a name="func-members"></a>
    55. 

  55. Functions</h2></td></tr>
    56. 

  56. <tr><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__q31__to__x.html#gacf407b007a37da18e99dabd9023c56b4">arm_q31_to_float</a> (<a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pSrc, <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>
    57. 

  57. <tr><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__q31__to__x.html#ga901dede4661365c9e7c630d3eb31c32c">arm_q31_to_q15</a> (<a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pSrc, <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>
    58. 

  58. <tr><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__q31__to__x.html#ga7f297d1a7d776805395095fdb24a8071">arm_q31_to_q7</a> (<a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pSrc, <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>
    59. 

  59. </table>
    60. 

  60. <hr/><h2>Function Documentation</h2>
    61. 

  61. <a class="anchor" id="gacf407b007a37da18e99dabd9023c56b4"></a><!-- doxytag: member="arm_q31_to_float.c::arm_q31_to_float" ref="gacf407b007a37da18e99dabd9023c56b4" args="(q31_t *pSrc, float32_t *pDst, uint32_t blockSize)" -->
    62. 

  62. <div class="memitem">
    63. 

  63. <div class="memproto">
    64. 

  64.       <table class="memname">
    65. 

  65.         <tr>
    66. 

  66.           <td class="memname">void arm_q31_to_float </td>
    67. 

  67.           <td>(</td>
    68. 

  68.           <td class="paramtype"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *&#160;</td>
    69. 

  69.           <td class="paramname"> <em>pSrc</em>, </td>
    70. 

  70.         </tr>
    71. 

  71.         <tr>
    72. 

  72.           <td class="paramkey"></td>
    73. 

  73.           <td></td>
    74. 

  74.           <td class="paramtype"><a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *&#160;</td>
    75. 

  75.           <td class="paramname"> <em>pDst</em>, </td>
    76. 

  76.         </tr>
    77. 

  77.         <tr>
    78. 

  78.           <td class="paramkey"></td>
    79. 

  79.           <td></td>
    80. 

  80.           <td class="paramtype">uint32_t&#160;</td>
    81. 

  81.           <td class="paramname"> <em>blockSize</em>&#160;</td>
    82. 

  82.         </tr>
    83. 

  83.         <tr>
    84. 

  84.           <td></td>
    85. 

  85.           <td>)</td>
    86. 

  86.           <td></td><td></td>
    87. 

  87.         </tr>
    88. 

  88.       </table>
    89. 

  89. </div>
    90. 

  90. <div class="memdoc">
    91. 

  91. 

  92. <p>Converts the elements of the Q31 vector to floating-point vector. </p>
    93. 

  93. <dl><dt><b>Parameters:</b></dt><dd>
    94. 

  94.   <table class="params">
    95. 

  95.     <tr><td class="paramdir">[in]</td><td class="paramname">*pSrc</td><td>points to the Q31 input vector </td></tr>
    96. 

  96.     <tr><td class="paramdir">[out]</td><td class="paramname">*pDst</td><td>points to the floating-point output vector </td></tr>
    97. 

  97.     <tr><td class="paramdir">[in]</td><td class="paramname">blockSize</td><td>length of the input vector </td></tr>
    98. 

  98.   </table>
    99. 

  99.   </dd>
    100. 

  100. </dl>
    101. 

  101. <dl class="return"><dt><b>Returns:</b></dt><dd>none.</dd></dl>
    102. 

  102. <dl class="user"><dt><b>Description: </b></dt><dd></dd></dl>
    103. 

  103. <p>The equation used for the conversion process is:</p>
    104. 

  104. <pre>   
    105. 

  105.  	pDst[n] = (float32_t) pSrc[n] / 2147483648;   0 &lt;= n &lt; blockSize.   
    106. 

  106.  </pre> <dl><dt><b>Examples: </b></dt><dd><a class="el" href="arm_graphic_equalizer_example_q31_8c-example.html#a27">arm_graphic_equalizer_example_q31.c</a>.</dd>
    107. 

  107. </dl>
    108. 

  108. <p>Definition at line <a class="el" href="arm__q31__to__float_8c_source.html#l00063">63</a> of file <a class="el" href="arm__q31__to__float_8c_source.html">arm_q31_to_float.c</a>.</p>
    109. 

  109. 

  110. </div>
    111. 

  111. </div>
    112. 

  112. <a class="anchor" id="ga901dede4661365c9e7c630d3eb31c32c"></a><!-- doxytag: member="arm_q31_to_q15.c::arm_q31_to_q15" ref="ga901dede4661365c9e7c630d3eb31c32c" args="(q31_t *pSrc, q15_t *pDst, uint32_t blockSize)" -->
    113. 

  113. <div class="memitem">
    114. 

  114. <div class="memproto">
    115. 

  115.       <table class="memname">
    116. 

  116.         <tr>
    117. 

  117.           <td class="memname">void arm_q31_to_q15 </td>
    118. 

  118.           <td>(</td>
    119. 

  119.           <td class="paramtype"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *&#160;</td>
    120. 

  120.           <td class="paramname"> <em>pSrc</em>, </td>
    121. 

  121.         </tr>
    122. 

  122.         <tr>
    123. 

  123.           <td class="paramkey"></td>
    124. 

  124.           <td></td>
    125. 

  125.           <td class="paramtype"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *&#160;</td>
    126. 

  126.           <td class="paramname"> <em>pDst</em>, </td>
    127. 

  127.         </tr>
    128. 

  128.         <tr>
    129. 

  129.           <td class="paramkey"></td>
    130. 

  130.           <td></td>
    131. 

  131.           <td class="paramtype">uint32_t&#160;</td>
    132. 

  132.           <td class="paramname"> <em>blockSize</em>&#160;</td>
    133. 

  133.         </tr>
    134. 

  134.         <tr>
    135. 

  135.           <td></td>
    136. 

  136.           <td>)</td>
    137. 

  137.           <td></td><td></td>
    138. 

  138.         </tr>
    139. 

  139.       </table>
    140. 

  140. </div>
    141. 

  141. <div class="memdoc">
    142. 

  142. 

  143. <p>Converts the elements of the Q31 vector to Q15 vector. </p>
    144. 

  144. <dl><dt><b>Parameters:</b></dt><dd>
    145. 

  145.   <table class="params">
    146. 

  146.     <tr><td class="paramdir">[in]</td><td class="paramname">*pSrc</td><td>points to the Q31 input vector </td></tr>
    147. 

  147.     <tr><td class="paramdir">[out]</td><td class="paramname">*pDst</td><td>points to the Q15 output vector </td></tr>
    148. 

  148.     <tr><td class="paramdir">[in]</td><td class="paramname">blockSize</td><td>length of the input vector </td></tr>
    149. 

  149.   </table>
    150. 

  150.   </dd>
    151. 

  151. </dl>
    152. 

  152. <dl class="return"><dt><b>Returns:</b></dt><dd>none.</dd></dl>
    153. 

  153. <dl class="user"><dt><b>Description: </b></dt><dd></dd></dl>
    154. 

  154. <p>The equation used for the conversion process is:</p>
    155. 

  155. <pre>   
    156. 

  156.  	pDst[n] = (q15_t) pSrc[n] &gt;&gt; 16;   0 &lt;= n &lt; blockSize.   
    157. 

  157.  </pre> 
    158. 

  158. <p>Definition at line <a class="el" href="arm__q31__to__q15_8c_source.html#l00059">59</a> of file <a class="el" href="arm__q31__to__q15_8c_source.html">arm_q31_to_q15.c</a>.</p>
    159. 

  159. 

  160. </div>
    161. 

  161. </div>
    162. 

  162. <a class="anchor" id="ga7f297d1a7d776805395095fdb24a8071"></a><!-- doxytag: member="arm_q31_to_q7.c::arm_q31_to_q7" ref="ga7f297d1a7d776805395095fdb24a8071" args="(q31_t *pSrc, q7_t *pDst, uint32_t blockSize)" -->
    163. 

  163. <div class="memitem">
    164. 

  164. <div class="memproto">
    165. 

  165.       <table class="memname">
    166. 

  166.         <tr>
    167. 

  167.           <td class="memname">void arm_q31_to_q7 </td>
    168. 

  168.           <td>(</td>
    169. 

  169.           <td class="paramtype"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *&#160;</td>
    170. 

  170.           <td class="paramname"> <em>pSrc</em>, </td>
    171. 

  171.         </tr>
    172. 

  172.         <tr>
    173. 

  173.           <td class="paramkey"></td>
    174. 

  174.           <td></td>
    175. 

  175.           <td class="paramtype"><a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_t</a> *&#160;</td>
    176. 

  176.           <td class="paramname"> <em>pDst</em>, </td>
    177. 

  177.         </tr>
    178. 

  178.         <tr>
    179. 

  179.           <td class="paramkey"></td>
    180. 

  180.           <td></td>
    181. 

  181.           <td class="paramtype">uint32_t&#160;</td>
    182. 

  182.           <td class="paramname"> <em>blockSize</em>&#160;</td>
    183. 

  183.         </tr>
    184. 

  184.         <tr>
    185. 

  185.           <td></td>
    186. 

  186.           <td>)</td>
    187. 

  187.           <td></td><td></td>
    188. 

  188.         </tr>
    189. 

  189.       </table>
    190. 

  190. </div>
    191. 

  191. <div class="memdoc">
    192. 

  192. 

  193. <p>Converts the elements of the Q31 vector to Q7 vector. </p>
    194. 

  194. <dl><dt><b>Parameters:</b></dt><dd>
    195. 

  195.   <table class="params">
    196. 

  196.     <tr><td class="paramdir">[in]</td><td class="paramname">*pSrc</td><td>points to the Q31 input vector </td></tr>
    197. 

  197.     <tr><td class="paramdir">[out]</td><td class="paramname">*pDst</td><td>points to the Q7 output vector </td></tr>
    198. 

  198.     <tr><td class="paramdir">[in]</td><td class="paramname">blockSize</td><td>length of the input vector </td></tr>
    199. 

  199.   </table>
    200. 

  200.   </dd>
    201. 

  201. </dl>
    202. 

  202. <dl class="return"><dt><b>Returns:</b></dt><dd>none.</dd></dl>
    203. 

  203. <dl class="user"><dt><b>Description: </b></dt><dd></dd></dl>
    204. 

  204. <p>The equation used for the conversion process is:</p>
    205. 

  205. <pre>   
    206. 

  206.  	pDst[n] = (q7_t) pSrc[n] &gt;&gt; 24;   0 &lt;= n &lt; blockSize.    
    207. 

  207.  </pre> 
    208. 

  208. <p>Definition at line <a class="el" href="arm__q31__to__q7_8c_source.html#l00059">59</a> of file <a class="el" href="arm__q31__to__q7_8c_source.html">arm_q31_to_q7.c</a>.</p>
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