DSP_blk_eswap32
[Miscellaneous]

Collaboration diagram for DSP_blk_eswap32:

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Detailed Description

void	DSP_blk_eswap32 (void *restrict src, void *restrict dst, int n_words)

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Function Documentation

void DSP_blk_eswap32	(	void *restrict	src,
		void *restrict	dst,
		int	n_words
	)

The data in the x[] array is endian swapped, meaning that the byte-order of the bytes within each word of the r[] array is reversed. This facilitates moving big-endian data to a little-endian system or vice-versa. When the r pointer is non-NULL, the endian-swap occurs out-of-place, similar to a block move. When the r pointer is NULL, the endian-swap occurs in-place, allowing the swap to occur without using any additional storage.

Parameters:

	src	= Source data, must be double-word aligned.
	dst	= Destination data, must be double-word aligned.
	n_words	= Number of 32-bit elements to swap.

Algorithm:

DSP_blk_eswap32_cn.c is the natural C equivalent of the optimized intrinsic C code without restrictions note that the intrinsic C code is optimized and restrictions may apply.

Assumptions:

Input and output arrays do not overlap, except when “dst == NULL” so that the operation occurs in-place.
The input array and output array are double-word aligned.
nx is a multiple of 4.

Implementation notes:

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

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Copyright 2014, Texas Instruments Incorporated