dsp_neg32.h64

来自「dm642函数库」· H64 代码 · 共 104 行

;* ======================================================================== *;
;*  TEXAS INSTRUMENTS, INC.                                                 *;
;*                                                                          *;
;*  DSPLIB  DSP Signal Processing Library                                   *;
;*                                                                          *;
;*      Release:        Revision 1.04b                                      *;
;*      CVS Revision:   1.6     Sun Sep 29 03:32:27 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.                                    *;
;* ======================================================================== *;
* ========================================================================= *
*   TEXAS INSTRUMENTS, INC.                                                 *
*                                                                           *
*   NAME                                                                    *
*       DSP_neg32                                                           *
*                                                                           *
*   REVISION DATE                                                           *
*       10-Dec-2001                                                         *
*                                                                           *
*   USAGE                                                                   *
*       This routine is C callable, and may be called using the following   *
*       C function prototype:                                               *
*                                                                           *
*           void DSP_neg32                                                  *
*           (                                                               *
*               int   *x,      /* Input data array     */                   *
*               int   *r,      /* Output data array    */                   *
*               short nx       /* Number of elements.  */                   *
*           );                                                              *
*                                                                           *
*   DESCRIPTION                                                             *
*       This routine negates an array of 32-bit integers, and stores        *
*       the result either in a new array, or back to the same array.        *
*                                                                           *
*           void DSP_neg32                                                  *
*           (                                                               *
*               int   *x,      /* Input data array     */                   *
*               int   *r,      /* Output data array    */                   *
*               short nx       /* Number of elements.  */                   *
*           )                                                               *
*           {                                                               *
*               int i;                                                      *
*                                                                           *
*               for (i = 0; i < nx; i++)                                    *
*                   r[i] = -x[i];                                           *
*           }                                                               *
*                                                                           *
*   ASSUMPTIONS                                                             *
*       The input must be at least 8 elements long, and a multiple of 4.    *
*                                                                           *
*       The input and output arrays must not overlap, except in the         *
*       special case where the input and output pointers are exactly        *
*       equal.                                                              *
*                                                                           *
*       The x and r arrays must be double-word aligned                      *
*                                                                           *
*   MEMORY NOTE                                                             *
*       No memory bank hits will occur.                                     *
*       This kernel is ENDIAN NEUTRAL.                                      *
*                                                                           *
*   NOTES                                                                   *
*       Code is interrupt tolerant but not interruptible.  It locks out     *
*       interrupts for its entire duration.                                 *
*                                                                           *
*   CYCLES                                                                  *
*       cycles = nx/2 + 19.                                                 *
*       nx = 96, cycles = 56 cycles                                         *
*                                                                           *
*   CODESIZE                                                                *
*       124 bytes                                                           *
*                                                                           *
* ------------------------------------------------------------------------- *
*             Copyright (c) 2003 Texas Instruments, Incorporated.           *
*                            All Rights Reserved.                           *
* ========================================================================= *

        .global _DSP_neg32

* ========================================================================= *
*   End of file:  dsp_neg32.h64                                             *
* ------------------------------------------------------------------------- *
*             Copyright (c) 2003 Texas Instruments, Incorporated.           *
*                            All Rights Reserved.                           *
* ========================================================================= *