;* ======================================================================== *;
;* TEXAS INSTRUMENTS, INC. *;
;* *;
;* DSPLIB DSP Signal Processing Library *;
;* *;
;* Release: Version 1.02 *;
;* CVS Revision: 1.7 Fri Mar 22 02:00:23 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_move -- Move a block of memory. Endian Neutral *
* *
* REVISION DATE *
* 11-Dec-2001 *
* *
* USAGE *
* This routine is C-callable and can be called as: *
* *
* void DSP_blk_move(const short *restrict x, *
* short *restrict 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. *
* *
* void DSP_blk_move(const short *restrict x, *
* short *restrict r, int nx) *
* { *
* int i; *
* for (i = 0 ; i < nx; i++) *
* r[i] = x[i]; *
* } *
* *
* ASSUMPTIONS *
* nx greater than or equal to 4 *
* nx a multiple of 2 *
* Source and destination arrays are word aligned. *
* Source and destination arrays do not overlap. *
* *
* TECHNIQUES *
* Twin input and output pointers are used. *
* Unrolled 4 times to use parallel LDWs and STWs. *
* Peeled off half-iteration to allow mult. of 2 instead mult. of 4. *
* Return branch issued from loop kernel to save cycles. *
* *
* NOTES *
* This function is interrupt tolerant, but not interruptible. *
* It locks out interrupts for its entire duration. *
* *
* MEMORY NOTE *
* No bank conflicts occur in this code. *
* This code is ENDIAN NEUTRAL. *
* *
* CYCLES *
* cycles = MAX(2 * (nx >> 2) + 15, 21) *
* For nx <= 14, cycles == 21. *
* For nx == 16, cycles == 23. *
* For nx == 100, cycles == 65. *
* *
* CODESIZE *
* 128 bytes. *
* ------------------------------------------------------------------------- *
* Copyright (c) 2002 Texas Instruments, Incorporated. *
* All Rights Reserved. *
* ========================================================================= *
.global _DSP_blk_move
* ========================================================================= *
* End of file: dsp_blk_move.h62 *
* ------------------------------------------------------------------------- *
* Copyright (c) 2002 Texas Instruments, Incorporated. *
* All Rights Reserved. *
* ========================================================================= *