;* ======================================================================== *; ;* TEXAS INSTRUMENTS, INC. *; ;* *; ;* DSPLIB DSP Signal Processing Library *; ;* *; ;* Release: Revision 1.04b *; ;* CVS Revision: 1.4 Sun Sep 29 03:32:18 2002 (UTC) *; ;* Snapshot date: 23-Oct-2003 *; ;* *; ;* 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) 2003 Texas Instruments, Incorporated. *; ;* All Rights Reserved. *; ;* ======================================================================== *; ;* ======================================================================== *; ;* Assembler compatibility shim for assembling 4.30 and later code on *; ;* tools prior to 4.30. *; ;* ======================================================================== *; ;* ======================================================================== *; ;* End of assembler compatibility shim. *; ;* ======================================================================== *; * ========================================================================= * * 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 double-word * * aligned, and a multiple of 4 words must be processed. * * * * NOTES * * This function locks out interrupts for its entire duration. * * It is interrupt tolerant, but not interruptible. * * * * CODESIZE * * 132 bytes * * * * CYCLES * * cycles = 20 + n_words / 4. * * * * ------------------------------------------------------------------------- * * Copyright (c) 2003 Texas Instruments, Incorporated. * * All Rights Reserved. * * ========================================================================= * .global _DSP_blk_eswap32 * ========================================================================= * * End of file: dsp_blk_eswap32.h64 * * ------------------------------------------------------------------------- * * Copyright (c) 2003 Texas Instruments, Incorporated. * * All Rights Reserved. * * ========================================================================= *