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101 lines
7.2 KiB
101 lines
7.2 KiB
/* ======================================================================== */
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/* TEXAS INSTRUMENTS, INC. */
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/* */
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/* DSPLIB DSP Signal Processing Library */
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/* */
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/* Release: Revision 1.04b */
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/* CVS Revision: 1.5 Sun Sep 29 03:32:18 2002 (UTC) */
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/* Snapshot date: 23-Oct-2003 */
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/* */
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/* This library contains proprietary intellectual property of Texas */
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/* Instruments, Inc. The library and its source code are protected by */
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/* various copyrights, and portions may also be protected by patents or */
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/* other legal protections. */
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/* */
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/* This software is licensed for use with Texas Instruments TMS320 */
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/* family DSPs. This license was provided to you prior to installing */
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/* the software. You may review this license by consulting the file */
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/* TI_license.PDF which accompanies the files in this library. */
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/* ------------------------------------------------------------------------ */
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/* Copyright (C) 2003 Texas Instruments, Incorporated. */
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/* All Rights Reserved. */
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/* ======================================================================== */
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/* ======================================================================== */
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/* Assembler compatibility shim for assembling 4.30 and later code on */
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/* tools prior to 4.30. */
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/* ======================================================================== */
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/* ======================================================================== */
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/* End of assembler compatibility shim. */
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/* ======================================================================== */
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/* ======================================================================== */
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/* NAME */
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/* DSP_blk_eswap64 -- Endian-swap a block of 64-bit values */
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/* */
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/* REVISION DATE */
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/* 10-Aug-2001 */
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/* */
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/* USAGE */
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/* This routine has the following C prototype: */
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/* */
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/* void DSP_blk_eswap64 */
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/* ( */
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/* void *restrict src, // Source data // */
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/* void *restrict dst, // Destination array // */
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/* int n_dbls // Number of double-words to swap // */
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/* ); */
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/* */
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/* This function performs an endian-swap on the data in the "src" */
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/* array, writing the results to "dst". If NULL is passed in for */
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/* the destination, then the endian-swap is performed in-place. */
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/* The "n_words" argument gives the total length of the array. */
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/* */
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/* DESCRIPTION */
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/* The data in the "src" array is endian swapped, meaning that the */
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/* byte-order of the bytes within each word of the src[] array is */
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/* reversed. This is meant to facilitate moving big-endian data */
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/* to a little-endian system or vice-versa. */
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/* */
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/* When the "dst" pointer is non-NULL, the endian-swap occurs */
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/* out-of-place, similar to a block move. When the "dst" pointer */
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/* is NULL, the endian-swap occurs in-place, allowing the swap to */
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/* occur without using any additional storage. */
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/* */
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/* ASSUMPTIONS */
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/* Input and output arrays do not overlap, except in the very */
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/* specific case that "dst == NULL" so that the operation occurs */
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/* in-place. */
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/* */
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/* The input array and output array are expected to be double-word */
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/* aligned, and a multiple of 2 double-words must be processed. */
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/* */
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/* NOTES */
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/* This function locks out interrupts for its entire duration. */
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/* It is interrupt tolerant, but not interruptible. */
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/* */
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/* CODESIZE */
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/* 132 bytes */
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/* */
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/* CYCLES */
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/* cycles = 20 + n_dbls / 2. */
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/* */
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/* ------------------------------------------------------------------------ */
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/* Copyright (c) 2003 Texas Instruments, Incorporated. */
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/* All Rights Reserved. */
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/* ======================================================================== */
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#ifndef DSP_BLK_ESWAP64_H_
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#define DSP_BLK_ESWAP64_H_ 1
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void DSP_blk_eswap64
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(
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void *restrict src, /* Source data */
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void *restrict dst, /* Destination array */
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int n_dbls /* Number of double-words to swap */
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);
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#endif
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/* ======================================================================== */
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/* End of file: dsp_blk_eswap64.h */
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/* ------------------------------------------------------------------------ */
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/* Copyright (c) 2003 Texas Instruments, Incorporated. */
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/* All Rights Reserved. */
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/* ======================================================================== */
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