;* ======================================================================== *;
;* TEXAS INSTRUMENTS, INC. *;
;* *;
;* DSPLIB DSP Signal Processing Library *;
;* *;
;* Release: Version 1.02 *;
;* CVS Revision: 1.4 Sat Mar 9 05:04:15 2002 (UTC) *;
;* Snapshot date: 18-Apr-2002 *;
;* *;
;* This library contains proprietary intellectual property of Texas *;
;* Instruments, Inc. The library and its source code are protected by *;
;* various copyrights, and portions may also be protected by patents or *;
;* other legal protections. *;
;* *;
;* This software is licensed for use with Texas Instruments TMS320 *;
;* family DSPs. This license was provided to you prior to installing *;
;* the software. You may review this license by consulting the file *;
;* TI_license.PDF which accompanies the files in this library. *;
;* ------------------------------------------------------------------------ *;
;* Copyright (C) 2002 Texas Instruments, Incorporated. *;
;* All Rights Reserved. *;
;* ======================================================================== *;
* ========================================================================= *
* NAME *
* DSP_blk_eswap32 -- Endian-swap a block of 32-bit values *
* *
* REVISION DATE *
* 10-Aug-2001 *
* *
* USAGE *
* This routine has the following C prototype: *
* *
* void DSP_blk_eswap32 *
* ( *
* void *restrict src, /* Source data */ *
* void *restrict dst, /* Destination array */ *
* int n_words /* Number of words to swap */ *
* ); *
* *
* This function performs an endian-swap on the data in the "src" *
* array, writing the results to "dst". If NULL is passed in for *
* the destination, then the endian-swap is performed in-place. *
* The "n_words" argument gives the total length of the array. *
* *
* DESCRIPTION *
* The data in the "src" array is endian swapped, meaning that the *
* byte-order of the bytes within each word of the src[] array is *
* reversed. This is meant to facilitate moving big-endian data *
* to a little-endian system or vice-versa. *
* *
* When the "dst" pointer is non-NULL, the endian-swap occurs *
* out-of-place, similar to a block move. When the "dst" pointer *
* is NULL, the endian-swap occurs in-place, allowing the swap to *
* occur without using any additional storage. *
* *
* ASSUMPTIONS *
* Input and output arrays do not overlap, except in the very *
* specific case that "dst == NULL" so that the operation occurs *
* in-place. *
* *
* The input array and output array are expected to be word *
* aligned, and a multiple of 2 words must be processed. *
* *
* The input array must be at least 4 words long. *
* *
* NOTES *
* This function locks out interrupts for its entire duration. *
* It is interrupt tolerant, but not interruptible. *
* *
* CODESIZE *
* 224 bytes *
* *
* CYCLES *
* cycles = 20 + 1.5 * n_words *
* *
* ------------------------------------------------------------------------- *
* Copyright (c) 2002 Texas Instruments, Incorporated. *
* All Rights Reserved. *
* ========================================================================= *
.global _DSP_blk_eswap32
* ========================================================================= *
* End of file: dsp_blk_eswap32.h62 *
* ------------------------------------------------------------------------- *
* Copyright (c) 2002 Texas Instruments, Incorporated. *
* All Rights Reserved. *
* ========================================================================= *