lib/exp2m1.c


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// Base-2 Exponential Minus 1
//
// exp2m1 - 2^x - 1
//
// y = 2^x - 1, computed as expm1(x * ln(2))
//
// Inputs:    1
// Outputs:   1
// Constants: 0

#include <math.h>
#include "ts.h"


ts_parameter_t const ts_exp2m1_p = { .n_inputs = 1, .n_outputs = 1, .n_constants = 0, .params_size = 0 };

uint_t ts_exp2m1_offset( ts_constant_t const *c )
{
	( void )c;
	return ( 0 );
}

int ts_exp2m1(
	fp_t * const *y, uint_t y_n,
	fp_t const * const *x, uint_t x_n,
	uint_t n, ts_constant_t const *c
)
{
	TS_PROLOGUE( ts_exp2m1_p );
	(void)c;
	for( uint_t i = 0; i < n; ++i )
	{
		y[0][i] = expm1( x[0][i] * log( 2.0 ) );
	}
	return 0;
}