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//
// This confidential and proprietary software may be used only as
// authorised by a licensing agreement from ARM Limited
// (C) COPYRIGHT 2020-2024 ARM Limited
// ALL RIGHTS RESERVED
// The entire notice above must be reproduced on all authorised
// copies and copies may only be made to the extent permitted
// by a licensing agreement from ARM Limited.
int16_t sigmoid_reference(int16_t x) { // input x range is -256 to + 256 inclusive
fp64_t v = (fp64_t)x / (fp64_t)16;
v = 1.0/(1.0 + exp(-v));
return round_to_nearest_int(32768.0 * v);
}
generate_lookup_table(&sigmoid_table, &sigmoid_reference);
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