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<p>This file include the declaration of common tables. Most of them are used for activation functions</p>
<p>Assumption: Unified table: input is 3.x format, i.e, range of [-8, 8) sigmoid(8) = 0.9996646498695336 tanh(8) = 0.9999997749296758 The accuracy here should be good enough</p>
<p>2-stage HL table:</p>
<p>The entire input range is divided into two parts:</p>
<p>Low range table: 0x000x xxxx or 0x111x xxxx table entry will be the binary number excluding the first two digits, i.