dsp_blk_move.h64

来自「dm642函数库」· H64 代码 · 共 95 行

;* ======================================================================== *;
;*  TEXAS INSTRUMENTS, INC.                                                 *;
;*                                                                          *;
;*  DSPLIB  DSP Signal Processing Library                                   *;
;*                                                                          *;
;*      Release:        Revision 1.04b                                      *;
;*      CVS Revision:   1.2     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_move -- Move block of memory (overlapping). Endian Neutral   *
*                                                                           *
*   REVISION DATE                                                           *
*       19-Jul-2001                                                         *
*                                                                           *
*   USAGE                                                                   *
*       This routine is C-callable and can be called as:                    *
*                                                                           *
*       void DSP_blk_move(short *x, short *r, int nx);                      *
*                                                                           *
*           x  --- block of data to be moved                                *
*           r  --- destination of block of data                             *
*           nx --- number of elements in block                              *
*                                                                           *
*   DESCRIPTION                                                             *
*       Move nx 16-bit elements from one memory location to another.        *
*       Source and destination may overlap.                                 *
*                                                                           *
*       void DSP_blk_move(short *x, short *r, int nx);                      *
*       {                                                                   *
*           int i;                                                          *
*                                                                           *
*           if (r < x)                                                      *
*           {                                                               *
*               for (i = 0 ; i < nx; i++)                                   *
*                   r[i] = x[i];                                            *
*           } else                                                          *
*           {                                                               *
*               for (i = nx-1 ; i >= 0; i--)                                *
*                   r[i] = x[i];                                            *
*           }                                                               *
*       }                                                                   *
*                                                                           *
*   ASSUMPTIONS                                                             *
*       nx greater than or equal to 32                                      *
*       nx a multiple of 8                                                  *
*                                                                           *
*   TECHNIQUES                                                              *
*       Twin input and output pointers are used.                            *
*                                                                           *
*   INTERRUPT NOTE                                                          *
*       This code is interrupt tolerant but not interruptible.              *
*                                                                           *
*   CYCLES                                                                  *
*       nx/4 + 18                                                           *
*                                                                           *
*       nx = 1024, cycles = 274.                                            *
*                                                                           *
*   CODESIZE                                                                *
*       112 bytes                                                           *
* ------------------------------------------------------------------------- *
*             Copyright (c) 2003 Texas Instruments, Incorporated.           *
*                            All Rights Reserved.                           *
* ========================================================================= *

        .global _DSP_blk_move

* ========================================================================= *
*   End of file:  dsp_blk_move.h64                                          *
* ------------------------------------------------------------------------- *
*             Copyright (c) 2003 Texas Instruments, Incorporated.           *
*                            All Rights Reserved.                           *
* ========================================================================= *