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    113. 

  113. <div class="title">Activation Functions<div class="ingroups"><a class="el" href="group__groupNN.html">Neural Network Functions</a></div></div>  </div>
    114. 

  114. </div><!--header-->
    115. 

  115. <div class="contents">
    116. 

  116. <table class="memberdecls">
    117. 

  117. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
    118. 

  118. Functions</h2></td></tr>
    119. 

  119. <tr class="memitem:ga8932b57c8d0ee757511af2d40dcc11e7"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__Acti.html#ga8932b57c8d0ee757511af2d40dcc11e7">arm_nn_activations_direct_q15</a> (q15_t *data, uint16_t size, uint16_t int_width, <a class="el" href="arm__nnsupportfunctions_8h.html#a7f41aa78cd9a0552fae9b348ee4831a0">arm_nn_activation_type</a> type)</td></tr>
    120. 

  120. <tr class="memdesc:ga8932b57c8d0ee757511af2d40dcc11e7"><td class="mdescLeft">&#160;</td><td class="mdescRight">neural network activation function using direct table look-up  <a href="#ga8932b57c8d0ee757511af2d40dcc11e7">More...</a><br/></td></tr>
    121. 

  121. <tr class="separator:ga8932b57c8d0ee757511af2d40dcc11e7"><td class="memSeparator" colspan="2">&#160;</td></tr>
    122. 

  122. <tr class="memitem:ga79f11131ae6767d60e03b1f6506b1af8"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__Acti.html#ga79f11131ae6767d60e03b1f6506b1af8">arm_nn_activations_direct_q7</a> (q7_t *data, uint16_t size, uint16_t int_width, <a class="el" href="arm__nnsupportfunctions_8h.html#a7f41aa78cd9a0552fae9b348ee4831a0">arm_nn_activation_type</a> type)</td></tr>
    123. 

  123. <tr class="memdesc:ga79f11131ae6767d60e03b1f6506b1af8"><td class="mdescLeft">&#160;</td><td class="mdescRight">Q7 neural network activation function using direct table look-up.  <a href="#ga79f11131ae6767d60e03b1f6506b1af8">More...</a><br/></td></tr>
    124. 

  124. <tr class="separator:ga79f11131ae6767d60e03b1f6506b1af8"><td class="memSeparator" colspan="2">&#160;</td></tr>
    125. 

  125. <tr class="memitem:ga01a7a7c17f0cd544e29c4752daeecdc3"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__Acti.html#ga01a7a7c17f0cd544e29c4752daeecdc3">arm_relu6_s8</a> (q7_t *data, uint16_t size)</td></tr>
    126. 

  126. <tr class="memdesc:ga01a7a7c17f0cd544e29c4752daeecdc3"><td class="mdescLeft">&#160;</td><td class="mdescRight">s8 ReLU6 function  <a href="#ga01a7a7c17f0cd544e29c4752daeecdc3">More...</a><br/></td></tr>
    127. 

  127. <tr class="separator:ga01a7a7c17f0cd544e29c4752daeecdc3"><td class="memSeparator" colspan="2">&#160;</td></tr>
    128. 

  128. <tr class="memitem:ga53bcc00e54b802919bb3c89c143ee5ba"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__Acti.html#ga53bcc00e54b802919bb3c89c143ee5ba">arm_relu_q15</a> (q15_t *data, uint16_t size)</td></tr>
    129. 

  129. <tr class="memdesc:ga53bcc00e54b802919bb3c89c143ee5ba"><td class="mdescLeft">&#160;</td><td class="mdescRight">Q15 RELU function.  <a href="#ga53bcc00e54b802919bb3c89c143ee5ba">More...</a><br/></td></tr>
    130. 

  130. <tr class="separator:ga53bcc00e54b802919bb3c89c143ee5ba"><td class="memSeparator" colspan="2">&#160;</td></tr>
    131. 

  131. <tr class="memitem:ga638e803b4fe00426f401783a6255ca30"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__Acti.html#ga638e803b4fe00426f401783a6255ca30">arm_relu_q7</a> (q7_t *data, uint16_t size)</td></tr>
    132. 

  132. <tr class="memdesc:ga638e803b4fe00426f401783a6255ca30"><td class="mdescLeft">&#160;</td><td class="mdescRight">Q7 RELU function.  <a href="#ga638e803b4fe00426f401783a6255ca30">More...</a><br/></td></tr>
    133. 

  133. <tr class="separator:ga638e803b4fe00426f401783a6255ca30"><td class="memSeparator" colspan="2">&#160;</td></tr>
    134. 

  134. </table>
    135. 

  135. <a name="details" id="details"></a><h2 class="groupheader">Description</h2>
    136. 

  136. <p>Perform activation layers, including ReLU (Rectified Linear Unit), sigmoid and tanh </p>
    137. 

  137. <h2 class="groupheader">Function Documentation</h2>
    138. 

  138. <a class="anchor" id="ga8932b57c8d0ee757511af2d40dcc11e7"></a>
    139. 

  139. <div class="memitem">
    140. 

  140. <div class="memproto">
    141. 

  141.       <table class="memname">
    142. 

  142.         <tr>
    143. 

  143.           <td class="memname">void arm_nn_activations_direct_q15 </td>
    144. 

  144.           <td>(</td>
    145. 

  145.           <td class="paramtype">q15_t *&#160;</td>
    146. 

  146.           <td class="paramname"><em>data</em>, </td>
    147. 

  147.         </tr>
    148. 

  148.         <tr>
    149. 

  149.           <td class="paramkey"></td>
    150. 

  150.           <td></td>
    151. 

  151.           <td class="paramtype">uint16_t&#160;</td>
    152. 

  152.           <td class="paramname"><em>size</em>, </td>
    153. 

  153.         </tr>
    154. 

  154.         <tr>
    155. 

  155.           <td class="paramkey"></td>
    156. 

  156.           <td></td>
    157. 

  157.           <td class="paramtype">uint16_t&#160;</td>
    158. 

  158.           <td class="paramname"><em>int_width</em>, </td>
    159. 

  159.         </tr>
    160. 

  160.         <tr>
    161. 

  161.           <td class="paramkey"></td>
    162. 

  162.           <td></td>
    163. 

  163.           <td class="paramtype"><a class="el" href="arm__nnsupportfunctions_8h.html#a7f41aa78cd9a0552fae9b348ee4831a0">arm_nn_activation_type</a>&#160;</td>
    164. 

  164.           <td class="paramname"><em>type</em>&#160;</td>
    165. 

  165.         </tr>
    166. 

  166.         <tr>
    167. 

  167.           <td></td>
    168. 

  168.           <td>)</td>
    169. 

  169.           <td></td><td></td>
    170. 

  170.         </tr>
    171. 

  171.       </table>
    172. 

  172. </div><div class="memdoc">
    173. 

  173. <p>Q15 neural network activation function using direct table look-up.</p>
    174. 

  174. <dl class="section note"><dt>Note</dt><dd>Refer header file for details. </dd></dl>
    175. 

  175. 

  176. <p>References <a class="el" href="arm__nnsupportfunctions_8h.html#a7f41aa78cd9a0552fae9b348ee4831a0a49b307e029715fbaa6f3101c806b8c54">ARM_SIGMOID</a>, <a class="el" href="arm__nnsupportfunctions_8h.html#a7f41aa78cd9a0552fae9b348ee4831a0ac24e4db95c986f16c10dca71a4b4e1c5">ARM_TANH</a>, <a class="el" href="arm__nn__tables_8h.html#ab4d7b07c387a3537d4efe21da86115b0">sigmoidTable_q15</a>, and <a class="el" href="arm__nn__tables_8h.html#a6faad2fec173b2702fd0f219a83ca320">tanhTable_q15</a>.</p>
    177. 

  177. 

  178. <p>Referenced by <a class="el" href="arm__nnexamples__gru_8cpp.html#ac71a806472c7c0c284a2253e71a6a27b">gru_example()</a>.</p>
    179. 

  179. 

  180. </div>
    181. 

  181. </div>
    182. 

  182. <a class="anchor" id="ga79f11131ae6767d60e03b1f6506b1af8"></a>
    183. 

  183. <div class="memitem">
    184. 

  184. <div class="memproto">
    185. 

  185.       <table class="memname">
    186. 

  186.         <tr>
    187. 

  187.           <td class="memname">void arm_nn_activations_direct_q7 </td>
    188. 

  188.           <td>(</td>
    189. 

  189.           <td class="paramtype">q7_t *&#160;</td>
    190. 

  190.           <td class="paramname"><em>data</em>, </td>
    191. 

  191.         </tr>
    192. 

  192.         <tr>
    193. 

  193.           <td class="paramkey"></td>
    194. 

  194.           <td></td>
    195. 

  195.           <td class="paramtype">uint16_t&#160;</td>
    196. 

  196.           <td class="paramname"><em>size</em>, </td>
    197. 

  197.         </tr>
    198. 

  198.         <tr>
    199. 

  199.           <td class="paramkey"></td>
    200. 

  200.           <td></td>
    201. 

  201.           <td class="paramtype">uint16_t&#160;</td>
    202. 

  202.           <td class="paramname"><em>int_width</em>, </td>
    203. 

  203.         </tr>
    204. 

  204.         <tr>
    205. 

  205.           <td class="paramkey"></td>
    206. 

  206.           <td></td>
    207. 

  207.           <td class="paramtype"><a class="el" href="arm__nnsupportfunctions_8h.html#a7f41aa78cd9a0552fae9b348ee4831a0">arm_nn_activation_type</a>&#160;</td>
    208. 

  208.           <td class="paramname"><em>type</em>&#160;</td>
    209. 

  209.         </tr>
    210. 

  210.         <tr>
    211. 

  211.           <td></td>
    212. 

  212.           <td>)</td>
    213. 

  213.           <td></td><td></td>
    214. 

  214.         </tr>
    215. 

  215.       </table>
    216. 

  216. </div><div class="memdoc">
    217. 

  217. <dl class="params"><dt>Parameters</dt><dd>
    218. 

  218.   <table class="params">
    219. 

  219.     <tr><td class="paramdir">[in,out]</td><td class="paramname">data</td><td>pointer to input </td></tr>
    220. 

  220.     <tr><td class="paramdir">[in]</td><td class="paramname">size</td><td>number of elements </td></tr>
    221. 

  221.     <tr><td class="paramdir">[in]</td><td class="paramname">int_width</td><td>bit-width of the integer part, assume to be smaller than 3 </td></tr>
    222. 

  222.     <tr><td class="paramdir">[in]</td><td class="paramname">type</td><td>type of activation functions</td></tr>
    223. 

  223.   </table>
    224. 

  224.   </dd>
    225. 

  225. </dl>
    226. 

  226. <p>This is the direct table look-up approach.</p>
    227. 

  227. <p>Assume here the integer part of the fixed-point is &lt;= 3. More than 3 just not making much sense, makes no difference with saturation followed by any of these activation functions. </p>
    228. 

  228. 

  229. <p>References <a class="el" href="arm__nnsupportfunctions_8h.html#a7f41aa78cd9a0552fae9b348ee4831a0a49b307e029715fbaa6f3101c806b8c54">ARM_SIGMOID</a>, <a class="el" href="arm__nnsupportfunctions_8h.html#a7f41aa78cd9a0552fae9b348ee4831a0ac24e4db95c986f16c10dca71a4b4e1c5">ARM_TANH</a>, <a class="el" href="arm__nn__tables_8h.html#ae2ff3f4e7014f535358167150bdd544f">sigmoidTable_q7</a>, and <a class="el" href="arm__nn__tables_8h.html#a4f854bdf13f630ec21b3ad074491e32f">tanhTable_q7</a>.</p>
    230. 

  230. 

  231. </div>
    232. 

  232. </div>
    233. 

  233. <a class="anchor" id="ga01a7a7c17f0cd544e29c4752daeecdc3"></a>
    234. 

  234. <div class="memitem">
    235. 

  235. <div class="memproto">
    236. 

  236.       <table class="memname">
    237. 

  237.         <tr>
    238. 

  238.           <td class="memname">void arm_relu6_s8 </td>
    239. 

  239.           <td>(</td>
    240. 

  240.           <td class="paramtype">q7_t *&#160;</td>
    241. 

  241.           <td class="paramname"><em>data</em>, </td>
    242. 

  242.         </tr>
    243. 

  243.         <tr>
    244. 

  244.           <td class="paramkey"></td>
    245. 

  245.           <td></td>
    246. 

  246.           <td class="paramtype">uint16_t&#160;</td>
    247. 

  247.           <td class="paramname"><em>size</em>&#160;</td>
    248. 

  248.         </tr>
    249. 

  249.         <tr>
    250. 

  250.           <td></td>
    251. 

  251.           <td>)</td>
    252. 

  252.           <td></td><td></td>
    253. 

  253.         </tr>
    254. 

  254.       </table>
    255. 

  255. </div><div class="memdoc">
    256. 

  256. <dl class="params"><dt>Parameters</dt><dd>
    257. 

  257.   <table class="params">
    258. 

  258.     <tr><td class="paramdir">[in,out]</td><td class="paramname">data</td><td>pointer to input </td></tr>
    259. 

  259.     <tr><td class="paramdir">[in]</td><td class="paramname">size</td><td>number of elements </td></tr>
    260. 

  260.   </table>
    261. 

  261.   </dd>
    262. 

  262. </dl>
    263. 

  263. 

  264. <p>References <a class="el" href="arm__nnsupportfunctions_8h.html#ad935f1ff1a50822e317bdb321ce991ad">MAX</a>, and <a class="el" href="arm__nnsupportfunctions_8h.html#adcd021ac91d43a62b2cdecf9a5b971a7">MIN</a>.</p>
    265. 

  265. 

  266. </div>
    267. 

  267. </div>
    268. 

  268. <a class="anchor" id="ga53bcc00e54b802919bb3c89c143ee5ba"></a>
    269. 

  269. <div class="memitem">
    270. 

  270. <div class="memproto">
    271. 

  271.       <table class="memname">
    272. 

  272.         <tr>
    273. 

  273.           <td class="memname">void arm_relu_q15 </td>
    274. 

  274.           <td>(</td>
    275. 

  275.           <td class="paramtype">q15_t *&#160;</td>
    276. 

  276.           <td class="paramname"><em>data</em>, </td>
    277. 

  277.         </tr>
    278. 

  278.         <tr>
    279. 

  279.           <td class="paramkey"></td>
    280. 

  280.           <td></td>
    281. 

  281.           <td class="paramtype">uint16_t&#160;</td>
    282. 

  282.           <td class="paramname"><em>size</em>&#160;</td>
    283. 

  283.         </tr>
    284. 

  284.         <tr>
    285. 

  285.           <td></td>
    286. 

  286.           <td>)</td>
    287. 

  287.           <td></td><td></td>
    288. 

  288.         </tr>
    289. 

  289.       </table>
    290. 

  290. </div><div class="memdoc">
    291. 

  291. <dl class="params"><dt>Parameters</dt><dd>
    292. 

  292.   <table class="params">
    293. 

  293.     <tr><td class="paramdir">[in,out]</td><td class="paramname">data</td><td>pointer to input </td></tr>
    294. 

  294.     <tr><td class="paramdir">[in]</td><td class="paramname">size</td><td>number of elements</td></tr>
    295. 

  295.   </table>
    296. 

  296.   </dd>
    297. 

  297. </dl>
    298. 

  298. <p>Optimized relu with QSUB instructions. </p>
    299. 

  299. 

  300. </div>
    301. 

  301. </div>
    302. 

  302. <a class="anchor" id="ga638e803b4fe00426f401783a6255ca30"></a>
    303. 

  303. <div class="memitem">
    304. 

  304. <div class="memproto">
    305. 

  305.       <table class="memname">
    306. 

  306.         <tr>
    307. 

  307.           <td class="memname">void arm_relu_q7 </td>
    308. 

  308.           <td>(</td>
    309. 

  309.           <td class="paramtype">q7_t *&#160;</td>
    310. 

  310.           <td class="paramname"><em>data</em>, </td>
    311. 

  311.         </tr>
    312. 

  312.         <tr>
    313. 

  313.           <td class="paramkey"></td>
    314. 

  314.           <td></td>
    315. 

  315.           <td class="paramtype">uint16_t&#160;</td>
    316. 

  316.           <td class="paramname"><em>size</em>&#160;</td>
    317. 

  317.         </tr>
    318. 

  318.         <tr>
    319. 

  319.           <td></td>
    320. 

  320.           <td>)</td>
    321. 

  321.           <td></td><td></td>
    322. 

  322.         </tr>
    323. 

  323.       </table>
    324. 

  324. </div><div class="memdoc">
    325. 

  325. <dl class="params"><dt>Parameters</dt><dd>
    326. 

  326.   <table class="params">
    327. 

  327.     <tr><td class="paramdir">[in,out]</td><td class="paramname">data</td><td>pointer to input </td></tr>
    328. 

  328.     <tr><td class="paramdir">[in]</td><td class="paramname">size</td><td>number of elements</td></tr>
    329. 

  329.   </table>
    330. 

  330.   </dd>
    331. 

  331. </dl>
    332. 

  332. <p>Optimized relu with QSUB instructions. </p>
    333. 

  333. 

  334. <p>Referenced by <a class="el" href="arm__nnexamples__cifar10_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main()</a>.</p>
    335. 

  335. 

  336. </div>
    337. 

  337. </div>
    338. 

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    339. 

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  343.     <li class="footer">Generated on Thu Apr 9 2020 15:49:34 for CMSIS-NN Version 1.3.0 by Arm Ltd. All rights reserved.
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