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<div class="title">arm_compute::utils::math Namespace Reference</div> </div>
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Functions</h2></td></tr>
<tr class="memitem:a788ba6c7989a35e2979dd0b315e8711f"><td class="memTemplParams" colspan="2">template&lt;typename T , REQUIRES_TA(std::is_integral&lt; T &gt;::value) &gt; </td></tr>
<tr class="memitem:a788ba6c7989a35e2979dd0b315e8711f"><td class="memTemplItemLeft" align="right" valign="top">T&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespacearm__compute_1_1utils_1_1math.xhtml#a788ba6c7989a35e2979dd0b315e8711f">safe_integer_add</a> (T val_a, T val_b)</td></tr>
<tr class="memdesc:a788ba6c7989a35e2979dd0b315e8711f"><td class="mdescLeft">&#160;</td><td class="mdescRight">Safe integer addition between two integers. <a href="#a788ba6c7989a35e2979dd0b315e8711f">More...</a><br /></td></tr>
<tr class="separator:a788ba6c7989a35e2979dd0b315e8711f"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a1e0ef3d630d8020cfa7e09ffada9bec4"><td class="memTemplParams" colspan="2">template&lt;typename T , REQUIRES_TA(std::is_integral&lt; T &gt;::value) &gt; </td></tr>
<tr class="memitem:a1e0ef3d630d8020cfa7e09ffada9bec4"><td class="memTemplItemLeft" align="right" valign="top">T&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespacearm__compute_1_1utils_1_1math.xhtml#a1e0ef3d630d8020cfa7e09ffada9bec4">safe_integer_sub</a> (T val_a, T val_b)</td></tr>
<tr class="memdesc:a1e0ef3d630d8020cfa7e09ffada9bec4"><td class="mdescLeft">&#160;</td><td class="mdescRight">Safe integer subtraction between two integers. <a href="#a1e0ef3d630d8020cfa7e09ffada9bec4">More...</a><br /></td></tr>
<tr class="separator:a1e0ef3d630d8020cfa7e09ffada9bec4"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a3e89b90d50a678e88d7821c5a3ad8326"><td class="memTemplParams" colspan="2">template&lt;typename T , REQUIRES_TA(std::is_integral&lt; T &gt;::value) &gt; </td></tr>
<tr class="memitem:a3e89b90d50a678e88d7821c5a3ad8326"><td class="memTemplItemLeft" align="right" valign="top">T&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespacearm__compute_1_1utils_1_1math.xhtml#a3e89b90d50a678e88d7821c5a3ad8326">safe_integer_mul</a> (T val_a, T val_b)</td></tr>
<tr class="memdesc:a3e89b90d50a678e88d7821c5a3ad8326"><td class="mdescLeft">&#160;</td><td class="mdescRight">Safe integer multiplication between two integers. <a href="#a3e89b90d50a678e88d7821c5a3ad8326">More...</a><br /></td></tr>
<tr class="separator:a3e89b90d50a678e88d7821c5a3ad8326"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a51d1b0d5c48f48b9605a760e1963b940"><td class="memTemplParams" colspan="2">template&lt;typename T , REQUIRES_TA(std::is_integral&lt; T &gt;::value) &gt; </td></tr>
<tr class="memitem:a51d1b0d5c48f48b9605a760e1963b940"><td class="memTemplItemLeft" align="right" valign="top">T&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespacearm__compute_1_1utils_1_1math.xhtml#a51d1b0d5c48f48b9605a760e1963b940">safe_integer_div</a> (T val_a, T val_b)</td></tr>
<tr class="memdesc:a51d1b0d5c48f48b9605a760e1963b940"><td class="mdescLeft">&#160;</td><td class="mdescRight">Safe integer division between two integers. <a href="#a51d1b0d5c48f48b9605a760e1963b940">More...</a><br /></td></tr>
<tr class="separator:a51d1b0d5c48f48b9605a760e1963b940"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<h2 class="groupheader">Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a788ba6c7989a35e2979dd0b315e8711f">&#9670;&nbsp;</a></span>safe_integer_add()</h2>
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<td class="memname">T arm_compute::utils::math::safe_integer_add </td>
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<td class="paramname"><em>val_a</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">T&#160;</td>
<td class="paramname"><em>val_b</em>&#160;</td>
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<p>Safe integer addition between two integers. </p>
<p>In case of an overflow the numeric max limit is return. In case of an underflow numeric max limit is return.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">T</td><td>Integer types to add</td></tr>
</table>
</dd>
</dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">val_a</td><td>First value to add </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">val_b</td><td>Second value to add</td></tr>
</table>
</dd>
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<dl class="section return"><dt>Returns</dt><dd>The addition result </dd></dl>
<p class="definition">Definition at line <a class="el" href="_safe_ops_8h_source.xhtml#l00048">48</a> of file <a class="el" href="_safe_ops_8h_source.xhtml">SafeOps.h</a>.</p>
<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; T result = 0;</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160;</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; <span class="keywordflow">if</span>((val_b &gt; 0) &amp;&amp; (val_a &gt; std::numeric_limits&lt;T&gt;::max() - val_b))</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; result = std::numeric_limits&lt;T&gt;::max();</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; }</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span>((val_b &lt; 0) &amp;&amp; (val_a &lt; std::numeric_limits&lt;T&gt;::min() - val_b))</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; result = std::numeric_limits&lt;T&gt;::min();</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; }</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="keywordflow">else</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; {</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; result = val_a + val_b;</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; }</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160;</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; <span class="keywordflow">return</span> result;</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;}</div></div><!-- fragment -->
<p class="reference">Referenced by <a class="el" href="_safe_integer_ops_8cpp_source.xhtml#l00042">arm_compute::test::validation::TEST_CASE()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a51d1b0d5c48f48b9605a760e1963b940">&#9670;&nbsp;</a></span>safe_integer_div()</h2>
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<td class="memname">T arm_compute::utils::math::safe_integer_div </td>
<td>(</td>
<td class="paramtype">T&#160;</td>
<td class="paramname"><em>val_a</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">T&#160;</td>
<td class="paramname"><em>val_b</em>&#160;</td>
</tr>
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<p>Safe integer division between two integers. </p>
<p>In case of an overflow the numeric max limit is return. In case of an underflow numeric max limit is return.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">T</td><td>Integer types to divide</td></tr>
</table>
</dd>
</dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">val_a</td><td>Dividend value </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">val_b</td><td>Divisor value</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The quotient </dd></dl>
<p class="definition">Definition at line <a class="el" href="_safe_ops_8h_source.xhtml#l00162">162</a> of file <a class="el" href="_safe_ops_8h_source.xhtml">SafeOps.h</a>.</p>
<div class="fragment"><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160;{</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160; T result = 0;</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160;</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160; <span class="keywordflow">if</span>((val_b == 0) || ((val_a == std::numeric_limits&lt;T&gt;::min()) &amp;&amp; (val_b == -1)))</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160; {</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160; result = std::numeric_limits&lt;T&gt;::min();</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160; }</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160; <span class="keywordflow">else</span></div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; {</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; result = val_a / val_b;</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160; }</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160;</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160; <span class="keywordflow">return</span> result;</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160;}</div></div><!-- fragment -->
<p class="reference">Referenced by <a class="el" href="_safe_integer_ops_8cpp_source.xhtml#l00105">arm_compute::test::validation::TEST_CASE()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a3e89b90d50a678e88d7821c5a3ad8326">&#9670;&nbsp;</a></span>safe_integer_mul()</h2>
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<td>(</td>
<td class="paramtype">T&#160;</td>
<td class="paramname"><em>val_a</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">T&#160;</td>
<td class="paramname"><em>val_b</em>&#160;</td>
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<p>Safe integer multiplication between two integers. </p>
<p>In case of an overflow the numeric max limit is return. In case of an underflow numeric max limit is return.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">T</td><td>Integer types to multiply</td></tr>
</table>
</dd>
</dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">val_a</td><td>First value to multiply </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">val_b</td><td>Second value to multiply</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The multiplication result </dd></dl>
<p class="definition">Definition at line <a class="el" href="_safe_ops_8h_source.xhtml#l00112">112</a> of file <a class="el" href="_safe_ops_8h_source.xhtml">SafeOps.h</a>.</p>
<div class="fragment"><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160;{</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; T result = 0;</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160;</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; <span class="keywordflow">if</span>(val_a &gt; 0)</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; {</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; <span class="keywordflow">if</span>((val_b &gt; 0) &amp;&amp; (val_a &gt; (std::numeric_limits&lt;T&gt;::max() / val_b)))</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; {</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; result = std::numeric_limits&lt;T&gt;::max();</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; }</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span>(val_b &lt; (std::numeric_limits&lt;T&gt;::min() / val_a))</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; {</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; result = std::numeric_limits&lt;T&gt;::min();</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; }</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; <span class="keywordflow">else</span></div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; {</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; result = val_a * val_b;</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; }</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; }</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; <span class="keywordflow">else</span></div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; {</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160; <span class="keywordflow">if</span>((val_b &gt; 0) &amp;&amp; (val_a &lt; (std::numeric_limits&lt;T&gt;::min() / val_b)))</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; {</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; result = std::numeric_limits&lt;T&gt;::max();</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160; }</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span>((val_a != 0) &amp;&amp; (val_b &lt; (std::numeric_limits&lt;T&gt;::max() / val_a)))</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160; {</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160; result = std::numeric_limits&lt;T&gt;::min();</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160; }</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160; <span class="keywordflow">else</span></div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; {</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160; result = val_a * val_b;</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160; }</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160; }</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160;</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; <span class="keywordflow">return</span> result;</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160;}</div></div><!-- fragment -->
<p class="reference">Referenced by <a class="el" href="_safe_integer_ops_8cpp_source.xhtml#l00076">arm_compute::test::validation::TEST_CASE()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a1e0ef3d630d8020cfa7e09ffada9bec4">&#9670;&nbsp;</a></span>safe_integer_sub()</h2>
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<td class="memname">T arm_compute::utils::math::safe_integer_sub </td>
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<td class="paramtype">T&#160;</td>
<td class="paramname"><em>val_a</em>, </td>
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<td class="paramtype">T&#160;</td>
<td class="paramname"><em>val_b</em>&#160;</td>
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<p>Safe integer subtraction between two integers. </p>
<p>In case of an overflow the numeric max limit is return. In case of an underflow numeric max limit is return.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">T</td><td>Integer types to subtract</td></tr>
</table>
</dd>
</dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">val_a</td><td>Value to subtract from </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">val_b</td><td>Value to subtract</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The subtraction result </dd></dl>
<p class="definition">Definition at line <a class="el" href="_safe_ops_8h_source.xhtml#l00080">80</a> of file <a class="el" href="_safe_ops_8h_source.xhtml">SafeOps.h</a>.</p>
<div class="fragment"><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;{</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; T result = 0;</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160;</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <span class="keywordflow">if</span>((val_b &lt; 0) &amp;&amp; (val_a &gt; std::numeric_limits&lt;T&gt;::max() + val_b))</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; {</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; result = std::numeric_limits&lt;T&gt;::max();</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; }</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span>((val_b &gt; 0) &amp;&amp; (val_a &lt; std::numeric_limits&lt;T&gt;::min() + val_b))</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; {</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; result = std::numeric_limits&lt;T&gt;::min();</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; }</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <span class="keywordflow">else</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; {</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; result = val_a - val_b;</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; }</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160;</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; <span class="keywordflow">return</span> result;</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160;}</div></div><!-- fragment -->
<p class="reference">Referenced by <a class="el" href="_safe_integer_ops_8cpp_source.xhtml#l00059">arm_compute::test::validation::TEST_CASE()</a>.</p>
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