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gerrit-public.fairphone.software / platform / external / ComputeLibrary / 8938bd3f40ea62ff56d6ed4e2db0a8aee34dd64a / . / documentation / quantization__layer_8cl.xhtml
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115<a href="#func-members">Functions</a> </div>
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117<div class="title">quantization_layer.cl File Reference</div> </div>
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119<div class="contents">
120<div class="textblock"><code>#include &quot;<a class="el" href="helpers_8h_source.xhtml">helpers.h</a>&quot;</code><br/>
121</div>
122<p><a href="quantization__layer_8cl_source.xhtml">Go to the source code of this file.</a></p>
123<table class="memberdecls">
124<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
125Functions</h2></td></tr>
126<tr class="memitem:a1f16fa20ae72c76df16155e6a3ad20c5"><td class="memItemLeft" align="right" valign="top">__kernel void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="quantization__layer_8cl.xhtml#a1f16fa20ae72c76df16155e6a3ad20c5">quantization_layer</a> (__global uchar *input_ptr, uint input_stride_x, uint input_step_x, uint input_stride_y, uint input_step_y, uint input_stride_z, uint input_step_z, 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_stride_z, uint output_step_z, uint output_offset_first_element_in_bytes, __global uchar *min_max_ptr, uint min_max_stride_x, uint min_max_step_x, uint min_max_offset_first_element_in_bytes)</td></tr>
127<tr class="memdesc:a1f16fa20ae72c76df16155e6a3ad20c5"><td class="mdescLeft">&#160;</td><td class="mdescRight">This performs the quantization of floating point inputs to 8-bit unsigned integers. <a href="#a1f16fa20ae72c76df16155e6a3ad20c5">More...</a><br/></td></tr>
128<tr class="separator:a1f16fa20ae72c76df16155e6a3ad20c5"><td class="memSeparator" colspan="2">&#160;</td></tr>
129</table>
130<h2 class="groupheader">Function Documentation</h2>
131<a class="anchor" id="a1f16fa20ae72c76df16155e6a3ad20c5"></a>
132<div class="memitem">
133<div class="memproto">
134 <table class="memname">
135 <tr>
136 <td class="memname">__kernel void quantization_layer </td>
137 <td>(</td>
138 <td class="paramtype">__global uchar *&#160;</td>
139 <td class="paramname"><em>input_ptr</em>, </td>
140 </tr>
141 <tr>
142 <td class="paramkey"></td>
143 <td></td>
144 <td class="paramtype">uint&#160;</td>
145 <td class="paramname"><em>input_stride_x</em>, </td>
146 </tr>
147 <tr>
148 <td class="paramkey"></td>
149 <td></td>
150 <td class="paramtype">uint&#160;</td>
151 <td class="paramname"><em>input_step_x</em>, </td>
152 </tr>
153 <tr>
154 <td class="paramkey"></td>
155 <td></td>
156 <td class="paramtype">uint&#160;</td>
157 <td class="paramname"><em>input_stride_y</em>, </td>
158 </tr>
159 <tr>
160 <td class="paramkey"></td>
161 <td></td>
162 <td class="paramtype">uint&#160;</td>
163 <td class="paramname"><em>input_step_y</em>, </td>
164 </tr>
165 <tr>
166 <td class="paramkey"></td>
167 <td></td>
168 <td class="paramtype">uint&#160;</td>
169 <td class="paramname"><em>input_stride_z</em>, </td>
170 </tr>
171 <tr>
172 <td class="paramkey"></td>
173 <td></td>
174 <td class="paramtype">uint&#160;</td>
175 <td class="paramname"><em>input_step_z</em>, </td>
176 </tr>
177 <tr>
178 <td class="paramkey"></td>
179 <td></td>
180 <td class="paramtype">uint&#160;</td>
181 <td class="paramname"><em>input_offset_first_element_in_bytes</em>, </td>
182 </tr>
183 <tr>
184 <td class="paramkey"></td>
185 <td></td>
186 <td class="paramtype">__global uchar *&#160;</td>
187 <td class="paramname"><em>output_ptr</em>, </td>
188 </tr>
189 <tr>
190 <td class="paramkey"></td>
191 <td></td>
192 <td class="paramtype">uint&#160;</td>
193 <td class="paramname"><em>output_stride_x</em>, </td>
194 </tr>
195 <tr>
196 <td class="paramkey"></td>
197 <td></td>
198 <td class="paramtype">uint&#160;</td>
199 <td class="paramname"><em>output_step_x</em>, </td>
200 </tr>
201 <tr>
202 <td class="paramkey"></td>
203 <td></td>
204 <td class="paramtype">uint&#160;</td>
205 <td class="paramname"><em>output_stride_y</em>, </td>
206 </tr>
207 <tr>
208 <td class="paramkey"></td>
209 <td></td>
210 <td class="paramtype">uint&#160;</td>
211 <td class="paramname"><em>output_step_y</em>, </td>
212 </tr>
213 <tr>
214 <td class="paramkey"></td>
215 <td></td>
216 <td class="paramtype">uint&#160;</td>
217 <td class="paramname"><em>output_stride_z</em>, </td>
218 </tr>
219 <tr>
220 <td class="paramkey"></td>
221 <td></td>
222 <td class="paramtype">uint&#160;</td>
223 <td class="paramname"><em>output_step_z</em>, </td>
224 </tr>
225 <tr>
226 <td class="paramkey"></td>
227 <td></td>
228 <td class="paramtype">uint&#160;</td>
229 <td class="paramname"><em>output_offset_first_element_in_bytes</em>, </td>
230 </tr>
231 <tr>
232 <td class="paramkey"></td>
233 <td></td>
234 <td class="paramtype">__global uchar *&#160;</td>
235 <td class="paramname"><em>min_max_ptr</em>, </td>
236 </tr>
237 <tr>
238 <td class="paramkey"></td>
239 <td></td>
240 <td class="paramtype">uint&#160;</td>
241 <td class="paramname"><em>min_max_stride_x</em>, </td>
242 </tr>
243 <tr>
244 <td class="paramkey"></td>
245 <td></td>
246 <td class="paramtype">uint&#160;</td>
247 <td class="paramname"><em>min_max_step_x</em>, </td>
248 </tr>
249 <tr>
250 <td class="paramkey"></td>
251 <td></td>
252 <td class="paramtype">uint&#160;</td>
253 <td class="paramname"><em>min_max_offset_first_element_in_bytes</em>&#160;</td>
254 </tr>
255 <tr>
256 <td></td>
257 <td>)</td>
258 <td></td><td></td>
259 </tr>
260 </table>
261</div><div class="memdoc">
262
263<p>This performs the quantization of floating point inputs to 8-bit unsigned integers. </p>
264<dl class="params"><dt>Parameters</dt><dd>
265 <table class="params">
266 <tr><td class="paramdir">[in]</td><td class="paramname">input_ptr</td><td>Pointer to the source image. Supported data types: F32 </td></tr>
267 <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>
268 <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>
269 <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>
270 <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>
271 <tr><td class="paramdir">[in]</td><td class="paramname">input_stride_z</td><td>Stride of the source tensor in Z dimension (in bytes) </td></tr>
272 <tr><td class="paramdir">[in]</td><td class="paramname">input_step_z</td><td>input_stride_z * number of elements along Z processed per workitem(in bytes) </td></tr>
273 <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>
274 <tr><td class="paramdir">[out]</td><td class="paramname">output_ptr</td><td>Pointer to the destination image. Supported data types: U8 </td></tr>
275 <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>
276 <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>
277 <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>
278 <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>
279 <tr><td class="paramdir">[in]</td><td class="paramname">output_stride_z</td><td>Stride of the source tensor in Z dimension (in bytes) </td></tr>
280 <tr><td class="paramdir">[in]</td><td class="paramname">output_step_z</td><td>output_stride_z * number of elements along Z processed per workitem(in bytes) </td></tr>
281 <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>
282 <tr><td class="paramdir">[in]</td><td class="paramname">min_max_ptr</td><td>Pointer to the min/max vector. Minimum value in position 0, maximum value in position 1. Supported data types: F32. </td></tr>
283 <tr><td class="paramdir">[in]</td><td class="paramname">min_max_stride_x</td><td>Stride of the min/max vector in X dimension (in bytes) </td></tr>
284 <tr><td class="paramdir">[in]</td><td class="paramname">min_max_step_x</td><td>min_max_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
285 <tr><td class="paramdir">[in]</td><td class="paramname">min_max_offset_first_element_in_bytes</td><td>The offset of the first element in the min/max vector </td></tr>
286 </table>
287 </dd>
288</dl>
289
290<p>Definition at line <a class="el" href="quantization__layer_8cl_source.xhtml#l00049">49</a> of file <a class="el" href="quantization__layer_8cl_source.xhtml">quantization_layer.cl</a>.</p>
291
292<p>References <a class="el" href="helpers_8h_source.xhtml#l00108">CONVERT_TO_TENSOR3D_STRUCT</a>, and <a class="el" href="helpers_8h_source.xhtml#l00142">Tensor3D::ptr</a>.</p>
293<div class="fragment"><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160;{</div>
294<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; <span class="comment">// Get pixels pointer</span></div>
295<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; <a class="code" href="struct_tensor3_d.xhtml">Tensor3D</a> input = <a class="code" href="helpers_8h.xhtml#a31c8c760f08fb1a331b16b7c204321dc">CONVERT_TO_TENSOR3D_STRUCT</a>(input);</div>
296<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <a class="code" href="struct_tensor3_d.xhtml">Tensor3D</a> output = <a class="code" href="helpers_8h.xhtml#a31c8c760f08fb1a331b16b7c204321dc">CONVERT_TO_TENSOR3D_STRUCT</a>(output);</div>
297<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;</div>
298<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; <span class="comment">// min_max_value.s0 = min, min_max_value.s1 = max</span></div>
299<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <span class="keyword">const</span> float2 min_max_value = vload2(0, (__global <span class="keywordtype">float</span> *)(min_max_ptr + min_max_offset_first_element_in_bytes));</div>
300<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160;</div>
301<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; <span class="keyword">const</span> float4 vmin = (float4)min_max_value.s0;</div>
302<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="keyword">const</span> float4 vrange = (float4)(min_max_value.s1 - min_max_value.s0);</div>
303<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;</div>
304<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="comment">// Load data</span></div>
305<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; float4 data = vload4(0, (__global <span class="keywordtype">float</span> *)input.<a class="code" href="struct_tensor3_d.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div>
306<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;</div>
307<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; <span class="comment">// Map float values to range [0.0, 1.0]</span></div>
308<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; data = (data - vmin) / vrange;</div>
309<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;</div>
310<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; <span class="comment">// Quantize and saturate</span></div>
311<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; uchar4 res = convert_uchar4_sat(data * 256.0f);</div>
312<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160;</div>
313<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; <span class="comment">// Store result</span></div>
314<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; vstore4(res, 0, (__global uchar *)output.<a class="code" href="struct_tensor3_d.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div>
315<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160;}</div>
316<div class="ttc" id="helpers_8h_xhtml_a31c8c760f08fb1a331b16b7c204321dc"><div class="ttname"><a href="helpers_8h.xhtml#a31c8c760f08fb1a331b16b7c204321dc">CONVERT_TO_TENSOR3D_STRUCT</a></div><div class="ttdeci">#define CONVERT_TO_TENSOR3D_STRUCT(name)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00108">helpers.h:108</a></div></div>
317<div class="ttc" id="struct_tensor3_d_xhtml"><div class="ttname"><a href="struct_tensor3_d.xhtml">Tensor3D</a></div><div class="ttdoc">Structure to hold 3D tensor information. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00140">helpers.h:140</a></div></div>
318<div class="ttc" id="struct_tensor3_d_xhtml_acf52c23cbd7424606c10a606524e3e32"><div class="ttname"><a href="struct_tensor3_d.xhtml#acf52c23cbd7424606c10a606524e3e32">Tensor3D::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#l00142">helpers.h:142</a></div></div>
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