DSPF_sp_autocor
[Correlation]

Collaboration diagram for DSPF_sp_autocor:

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Detailed Description

void	DSPF_sp_autocor (float *restrict r, float *restrict x, const int nx, const int nr)

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Function Documentation

void DSPF_sp_autocor	(	float *restrict	r,
		float *restrict	x,
		const int	nx,
		const int	nr
	)

This routine performs the autocorrelation of the input array x. It is assumed that the length of the input array, x, is a multiple of 4 and the length of the output array, r, is a multiple of 4. It is assumed that input vector x is padded with nr no of zeros in the beginning.

Parameters:

	r	Pointer to output array of autocorrelation of length nr
	x	Pointer to input array of length nx+nr Input data must be padded with nr consecutive zeros at the beginning
	nx	Length of autocorrelation vector
	nr	Length of lags

Algorithm:

DSPF_sp_autocor_cn.c is the natural C equivalent of the optimized linear assembly code without restrictions. Note that the linear assembly code is optimized and restrictions may apply.

Assumptions:

nx is a multiple of 4 and greater than or equal to 4
nr is a multiple of 4 and greater than or equal to 4
nx is greater than or equal to nr
x is double-word aligned

Implementation Notes:

Interruptibility: The code is interruptible.
Endian Support: The code supports both big and little endian modes.

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Copyright 2014, Texas Instruments Incorporated