nrf_axon_mar_16_16_24()

nrf_axon_result_e nrf_axon_mar_16_16_24	(	const int16_t *	x_ptr,
		const int16_t *	y_ptr,
		int32_t *	out_ptr,
		uint16_t	length,
		uint8_t	rounding_bits,
		nrf_axon_syncmode_blocking_e	block_mode,
		bool	keep_reservation )

#include <include/drivers/axon/nrf_axon_dsp_intrinsics.h>

"Mar" => "Multiply, Accumulate, recursive" sums the products of elements in input vector X and input vector Y (ie, dot product)

Parameters

x_ptr	x vector input. 16bit integers packed.
y_ptr	y vector input. 16bit integers packed.
out_ptr	output scalar. 24bit integer rounded by rounding_bits.
length	Number of elements in the vectors (data samples). Must be a multiple of 4, at least 8, and no greater than 512.
rounding_bits	Number of bits to round the output by. 0 => no rounding, maximum of 31.
block_mode	recommnended to be set to NRF_AXON_SYNC_MODE_BLOCKING_POLLING.
keep_reservation	set to true if there are subsequent axon operations to execute immediately on completion. true prevents axon from be taken by another user and/or being powered off. Set to false if axon will not be used immediately after to free axon for other users and/or power down if idle.

Returns

kAxonResultSuccess on success or a negative error code (see nrf_axon_result_e)