You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
126 lines
9.0 KiB
126 lines
9.0 KiB
/* ======================================================================== */
|
|
/* TEXAS INSTRUMENTS, INC. */
|
|
/* */
|
|
/* DSPLIB DSP Signal Processing Library */
|
|
/* */
|
|
/* Release: Revision 1.04b */
|
|
/* CVS Revision: 1.13 Sun Sep 29 03:32:31 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_w_vec: Weighted vector sum */
|
|
/* */
|
|
/* */
|
|
/* REVISION DATE */
|
|
/* 29-Mar-2002 */
|
|
/* */
|
|
/* USAGE */
|
|
/* This routine is C-callable and can be called as: */
|
|
/* */
|
|
/* void DSP_w_vec */
|
|
/* ( */
|
|
/* const short *x, // Vector being weighted // */
|
|
/* const short *y, // Non-weighted vector // */
|
|
/* short m, // weighting factor // */
|
|
/* short *restrict r, // Result vector // */
|
|
/* int nr // Number of samples. // */
|
|
/* ); */
|
|
/* */
|
|
/* DESCRIPTION */
|
|
/* The benchmark performs a weighted vector sum. The elements */
|
|
/* of the x[] vector are weighted according to the Q15 value 'm', */
|
|
/* and then added to the corresponding elements of the y[] vector. */
|
|
/* The results are written to the r[] vector. */
|
|
/* */
|
|
/* C CODE */
|
|
/* The following is a C code description of the algorithm. This */
|
|
/* implementation may have restrictions, as noted under */
|
|
/* "ASSUMPTIONS" below. */
|
|
/* */
|
|
/* void DSP_w_vec */
|
|
/* ( */
|
|
/* const short *x, // Vector being weighted // */
|
|
/* const short *y, // Non-weighted vector // */
|
|
/* short m, // weighting factor // */
|
|
/* short *restrict r, // Result vector // */
|
|
/* int nr // Number of samples. // */
|
|
/* ) */
|
|
/* { */
|
|
/* int i; */
|
|
/* */
|
|
/* for (i = 0; i < nr; i++) */
|
|
/* r[i] = ((m * x[i]) >> 15) + y[i]; */
|
|
/* } */
|
|
/* */
|
|
/* ASSUMPTIONS */
|
|
/* m is not -32768. */
|
|
/* nr >= 8, nr is multiple of eight. */
|
|
/* Input and output arrays must be double-word aligned. */
|
|
/* */
|
|
/* MEMORY NOTE */
|
|
/* No bank conflicts occur. */
|
|
/* This code is endian neutral. */
|
|
/* */
|
|
/* TECHNIQUES */
|
|
/* 1. Load double words for input data. */
|
|
/* 2. Use packed data processing to sustain throughput. */
|
|
/* */
|
|
/* NOTES */
|
|
/* This code is interrupt tolerant but not interruptible. */
|
|
/* */
|
|
/* CYCLES */
|
|
/* 3*nr/8 + 18 */
|
|
/* For nr = 256, cycles = 114. */
|
|
/* */
|
|
/* CODESIZE */
|
|
/* 144 bytes */
|
|
/* */
|
|
/* SOURCE */
|
|
/* DSPLIB. */
|
|
/* */
|
|
/* ------------------------------------------------------------------------ */
|
|
/* Copyright (c) 2003 Texas Instruments, Incorporated. */
|
|
/* All Rights Reserved. */
|
|
/* ======================================================================== */
|
|
#ifndef DSP_W_VEC_H_
|
|
#define DSP_W_VEC_H_ 1
|
|
|
|
void DSP_w_vec
|
|
(
|
|
const short *x, /* Vector being weighted */
|
|
const short *y, /* Non-weighted vector */
|
|
short m, /* weighting factor */
|
|
short *restrict r, /* Result vector */
|
|
int nr /* Number of samples. */
|
|
);
|
|
|
|
#endif
|
|
/* ======================================================================== */
|
|
/* End of file: dsp_w_vec.h */
|
|
/* ------------------------------------------------------------------------ */
|
|
/* Copyright (c) 2003 Texas Instruments, Incorporated. */
|
|
/* All Rights Reserved. */
|
|
/* ======================================================================== */
|
|
|