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 114 <div class="header">
 115   <div class="summary">
 116 <a href="#func-members">Functions</a>  </div>
 117   <div class="headertitle">
 118 <div class="title">activation_layer.cl File Reference</div>  </div>
 119 </div><!--header-->
 120 <div class="contents">
 121 <div class="textblock"><code>#include &quot;<a class="el" href="helpers_8h_source.xhtml">helpers.h</a>&quot;</code><br />
 122 </div>
 123 <p><a href="activation__layer_8cl_source.xhtml">Go to the source code of this file.</a></p>
 124 <table class="memberdecls">
 125 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
 126 Functions</h2></td></tr>
 127 <tr class="memitem:af56e71195597e525c12f0d8969735e47"><td class="memItemLeft" align="right" valign="top">__kernel void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="activation__layer_8cl.xhtml#af56e71195597e525c12f0d8969735e47">activation_layer</a> (__global uchar *input_ptr, uint input_stride_x, uint input_step_x, uint input_stride_y, uint input_step_y, uint input_offset_first_element_in_bytes, __global uchar *output_ptr, uint output_stride_x, uint output_step_x, uint output_stride_y, uint output_step_y, uint output_offset_first_element_in_bytes)</td></tr>
 128 <tr class="memdesc:af56e71195597e525c12f0d8969735e47"><td class="mdescLeft">&#160;</td><td class="mdescRight">This performs an activation function floating point inputs.  <a href="#af56e71195597e525c12f0d8969735e47">More...</a><br /></td></tr>
 129 <tr class="separator:af56e71195597e525c12f0d8969735e47"><td class="memSeparator" colspan="2">&#160;</td></tr>
 130 </table>
 131 <h2 class="groupheader">Function Documentation</h2>
 132 <a class="anchor" id="af56e71195597e525c12f0d8969735e47"></a>
 133 <div class="memitem">
 134 <div class="memproto">
 135       <table class="memname">
 136         <tr>
 137           <td class="memname">__kernel void activation_layer </td>
 138           <td>(</td>
 139           <td class="paramtype">__global uchar *&#160;</td>
 140           <td class="paramname"><em>input_ptr</em>, </td>
 141         </tr>
 142         <tr>
 143           <td class="paramkey"></td>
 144           <td></td>
 145           <td class="paramtype">uint&#160;</td>
 146           <td class="paramname"><em>input_stride_x</em>, </td>
 147         </tr>
 148         <tr>
 149           <td class="paramkey"></td>
 150           <td></td>
 151           <td class="paramtype">uint&#160;</td>
 152           <td class="paramname"><em>input_step_x</em>, </td>
 153         </tr>
 154         <tr>
 155           <td class="paramkey"></td>
 156           <td></td>
 157           <td class="paramtype">uint&#160;</td>
 158           <td class="paramname"><em>input_stride_y</em>, </td>
 159         </tr>
 160         <tr>
 161           <td class="paramkey"></td>
 162           <td></td>
 163           <td class="paramtype">uint&#160;</td>
 164           <td class="paramname"><em>input_step_y</em>, </td>
 165         </tr>
 166         <tr>
 167           <td class="paramkey"></td>
 168           <td></td>
 169           <td class="paramtype">uint&#160;</td>
 170           <td class="paramname"><em>input_offset_first_element_in_bytes</em>, </td>
 171         </tr>
 172         <tr>
 173           <td class="paramkey"></td>
 174           <td></td>
 175           <td class="paramtype">__global uchar *&#160;</td>
 176           <td class="paramname"><em>output_ptr</em>, </td>
 177         </tr>
 178         <tr>
 179           <td class="paramkey"></td>
 180           <td></td>
 181           <td class="paramtype">uint&#160;</td>
 182           <td class="paramname"><em>output_stride_x</em>, </td>
 183         </tr>
 184         <tr>
 185           <td class="paramkey"></td>
 186           <td></td>
 187           <td class="paramtype">uint&#160;</td>
 188           <td class="paramname"><em>output_step_x</em>, </td>
 189         </tr>
 190         <tr>
 191           <td class="paramkey"></td>
 192           <td></td>
 193           <td class="paramtype">uint&#160;</td>
 194           <td class="paramname"><em>output_stride_y</em>, </td>
 195         </tr>
 196         <tr>
 197           <td class="paramkey"></td>
 198           <td></td>
 199           <td class="paramtype">uint&#160;</td>
 200           <td class="paramname"><em>output_step_y</em>, </td>
 201         </tr>
 202         <tr>
 203           <td class="paramkey"></td>
 204           <td></td>
 205           <td class="paramtype">uint&#160;</td>
 206           <td class="paramname"><em>output_offset_first_element_in_bytes</em>&#160;</td>
 207         </tr>
 208         <tr>
 209           <td></td>
 210           <td>)</td>
 211           <td></td><td></td>
 212         </tr>
 213       </table>
 214 </div><div class="memdoc">
 215
 216 <p>This performs an activation function floating point inputs. </p>
 217 <dl class="section note"><dt>Note</dt><dd>Datatype should be given as a preprocessor argument using -DDATA_TYPE=type. e.g. -DDATA_TYPE=short </dd>
 218 <dd>
 219 Activation function should be given as a preprocessor argument using -DNAME. e.g. -DTANH </dd>
 220 <dd>
 221 Distinction between floating point and integer is done using -DTYPE_FP and -DTYPE_INT preprocessor argument </dd>
 222 <dd>
 223 A, B variables required by some activation functions are set using -DA= and -DB= respectively.</dd></dl>
 224 <dl class="params"><dt>Parameters</dt><dd>
 225   <table class="params">
 226     <tr><td class="paramdir">[in]</td><td class="paramname">input_ptr</td><td>Pointer to the source image. Supported data types: F16, F32 </td></tr>
 227     <tr><td class="paramdir">[in]</td><td class="paramname">input_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr>
 228     <tr><td class="paramdir">[in]</td><td class="paramname">input_step_x</td><td>input_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
 229     <tr><td class="paramdir">[in]</td><td class="paramname">input_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr>
 230     <tr><td class="paramdir">[in]</td><td class="paramname">input_step_y</td><td>input_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
 231     <tr><td class="paramdir">[in]</td><td class="paramname">input_offset_first_element_in_bytes</td><td>The offset of the first element in the source image </td></tr>
 232     <tr><td class="paramdir">[out]</td><td class="paramname">output_ptr</td><td>Pointer to the destination image. Supported data types: F16, F32 </td></tr>
 233     <tr><td class="paramdir">[in]</td><td class="paramname">output_stride_x</td><td>Stride of the destination image in X dimension (in bytes) </td></tr>
 234     <tr><td class="paramdir">[in]</td><td class="paramname">output_step_x</td><td>output_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
 235     <tr><td class="paramdir">[in]</td><td class="paramname">output_stride_y</td><td>Stride of the destination image in Y dimension (in bytes) </td></tr>
 236     <tr><td class="paramdir">[in]</td><td class="paramname">output_step_y</td><td>output_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
 237     <tr><td class="paramdir">[in]</td><td class="paramname">output_offset_first_element_in_bytes</td><td>The offset of the first element in the destination image </td></tr>
 238   </table>
 239   </dd>
 240 </dl>
 241
 242 <p>Definition at line <a class="el" href="activation__layer_8cl_source.xhtml#l00046">46</a> of file <a class="el" href="activation__layer_8cl_source.xhtml">activation_layer.cl</a>.</p>
 243
 244 <p>References <a class="el" href="helpers_8h_source.xhtml#l00073">CONVERT_TO_IMAGE_STRUCT</a>, <a class="el" href="convolution3x3_8cl_source.xhtml#l00027">DATA_TYPE</a>, <a class="el" href="helpers_8h_source.xhtml#l00097">Image::ptr</a>, and <a class="el" href="helpers_8h_source.xhtml#l00032">VEC_DATA_TYPE</a>.</p>
 245 <div class="fragment"><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;{</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;    <span class="comment">// Get pixels pointer</span></div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a> input  = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(input);</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a> output = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(output);</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;    <span class="comment">// Load data</span></div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;    <a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a>, 16)</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;    data = vload16(0, (__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)input.ptr);</div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;    <span class="comment">// Perform activation</span></div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;<span class="preprocessor">#if defined LOGISTIC</span></div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;    data = 1 / (1 + exp(-data));</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;<span class="preprocessor">#elif defined TANH</span></div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;    data = (<a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a>, 16))A * tanh((<a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a>, 16))<a class="code" href="namespacearm__compute.xhtml#a1ce9b523fd4f3b5bbcadcd796183455aa9d5ed678fe57bcca610140957afab571">B</a> * data);</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;<span class="preprocessor">#elif defined RELU</span></div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;    data = max(0, data);</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;<span class="preprocessor">#elif defined BRELU</span></div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;    data = min((<a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a>, 16))A, max(0, data));</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;<span class="preprocessor">#elif defined SRELU</span></div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;    data = log(1 + exp(data));</div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;<span class="preprocessor">#elif defined ABS</span></div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;<span class="preprocessor">#if defined   TYPE_INT</span></div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;    data = abs(data);</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;<span class="preprocessor">#else</span></div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;    data = fabs(data);</div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;<span class="preprocessor">#elif defined SQUARE</span></div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;    data = data * data;</div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;<span class="preprocessor">#elif defined SQRT</span></div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;    data = sqrt(data);</div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;<span class="preprocessor">#elif defined LINEAR</span></div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;    data = (<a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a>, 16))A * data + (<a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a>, 16))B;</div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;    <span class="comment">// Store result</span></div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;    vstore16(data, 0, (__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)output.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;}</div><div class="ttc" id="convolution3x3_8cl_xhtml_afb8c72ce35c4a1f4a2588d6573e54aa1"><div class="ttname"><a href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a></div><div class="ttdeci">#define DATA_TYPE</div><div class="ttdef"><b>Definition:</b> <a href="convolution3x3_8cl_source.xhtml#l00027">convolution3x3.cl:27</a></div></div>
 246 <div class="ttc" id="namespacearm__compute_xhtml_a1ce9b523fd4f3b5bbcadcd796183455aa9d5ed678fe57bcca610140957afab571"><div class="ttname"><a href="namespacearm__compute.xhtml#a1ce9b523fd4f3b5bbcadcd796183455aa9d5ed678fe57bcca610140957afab571">arm_compute::Channel::B</a></div><div class="ttdoc">Blue channel. </div></div>
 247 <div class="ttc" id="helpers_8h_xhtml_aebe814363556c244be043b13e7969197"><div class="ttname"><a href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a></div><div class="ttdeci">#define CONVERT_TO_IMAGE_STRUCT(name)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00073">helpers.h:73</a></div></div>
 248 <div class="ttc" id="helpers_8h_xhtml_a36f754c05b6fddf6df0d8d0a74f8159f"><div class="ttname"><a href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a></div><div class="ttdeci">#define VEC_DATA_TYPE(type, size)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00032">helpers.h:32</a></div></div>
 249 <div class="ttc" id="struct_image_xhtml"><div class="ttname"><a href="struct_image.xhtml">Image</a></div><div class="ttdoc">Structure to hold Image information. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00095">helpers.h:95</a></div></div>
 250 <div class="ttc" id="struct_image_xhtml_acf52c23cbd7424606c10a606524e3e32"><div class="ttname"><a href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">Image::ptr</a></div><div class="ttdeci">__global uchar * ptr</div><div class="ttdoc">Pointer to the starting postion of the buffer. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00097">helpers.h:97</a></div></div>
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