lib/polynomial.c


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// Polynomial Power
//
// polynomial - pow(x, y)
//
// x raised to the power y
//
// Inputs:    2 (base, exponent)
// Outputs:   1
// Constants: 0

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


ts_parameter_t const ts_polynomial_p = { .n_inputs = 2, .n_outputs = 1, .n_constants = 0, .params_size = 0 };

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

int ts_polynomial(
	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_polynomial_p );
	(void)c;
    /* x[0] = base, x[1] = exponent */
    for (uint_t i = 0; i < n; ++i)
    {
        fp_t base = x[0][i];
        fp_t exponent = x[1][i];
        if( base < 0.0 && exponent != (fp_t)(long)exponent ) { y[0][i] = NAN; continue; }
        y[0][i] = pow(base, exponent);
    }
	return 0;
}