nrf_axon_logn_11p12()

nrf_axon_result_e nrf_axon_logn_11p12	(	const int32_t *	in_ptr,
		int32_t *	out_ptr,
		uint16_t	length,
		nrf_axon_syncmode_blocking_e	block_mode,
		bool	keep_reservation )

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

"logn"=> "Natural Log" Calculates the natural log of vector input, output=ln(input). Input and output are both interpreted as q11.12. If the input radix doesn't match 11.12, then an offset can be added to the output to correct the result for radix 12. For an input radix "r", the offset to add is ln(2^^r) << 12.

Parameters

in_ptr	pointer to the input, q11.12 sign-extended to 32bits.
out_ptr	pointer to the output, q11.12 sign-extended to 32bits. Output can overlap/overwrite input.
length	length of the input/output (in elements). Must be a multiple of 2, at least 2, and maximum of 512.
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)