/* ======================================================================== */
/* TEXAS INSTRUMENTS, INC. */
/* */
/* DSPLIB DSP Signal Processing Library */
/* */
/* Release: Version 1.02 */
/* CVS Revision: 1.4 Fri Mar 29 20:07:39 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. */
/* ======================================================================== */
/* ======================================================================== */
/* */
/* TEXAS INSTRUMENTS, INC. */
/* */
/* NAME */
/* DSP_dotp_sqr */
/* */
/* REVISION DATE */
/* 29-Mar-2002 */
/* */
/* USAGE */
/* This routine is C callable, and can be called as: */
/* */
/* int DSP_dotp_sqr */
/* ( */
/* int G, // Sum-of-y-squared initial value // */
/* const short *x, // First input array. // */
/* const short *y, // Second input array. // */
/* int *restrict r, // Accumulation of x[] * y[]. // */
/* int nx // Length of the input vector. // */
/* ); */
/* */
/* DESCRIPTION */
/* This routine computes the dot product of x[] and y[] arrays, */
/* adding it to the value in the location pointed to by 'r'. */
/* */
/* Additionally, it computes the sum of the squares of the terms */
/* in the y[] array, adding it to the argument G. The final value */
/* of G is given as the return value of the function. This value */
/* is used by the VSELP vocoder. */
/* */
/* The following C code is an implementation of the algorithm */
/* without restrictions. Optimized implementations may add */
/* restrictions as noted under the heading "ASSUMPTIONS." */
/* */
/* int DSP_dotp_sqr */
/* ( */
/* int G, // Sum-of-y-squared initial value // */
/* const short *x, // First input array. // */
/* const short *y, // Second input array. // */
/* int *restrict r, // Accumulation of x[] * y[]. // */
/* int nx // Length of the input vector. // */
/* ) */
/* { */
/* int i; */
/* */
/* for (i = 0; i < nx; i++) */
/* { */
/* *r += x[i] * y[i]; */
/* G += y[i] * y[i]; */
/* } */
/* */
/* return G; */
/* } */
/* */
/* ASSUMPTIONS */
/* nx >= 12, nx % 4 == 0. */
/* */
/* TECHNIQUES */
/* Unrolled 4 times to maximize multiplier utilization. */
/* */
/* MEMORY NOTE */
/* No bank conflicts occur under any conditions. */
/* This code is ENDIAN NEUTRAL. */
/* */
/* CYCLES */
/* nx + 20 */
/* */
/* CODESIZE */
/* 192 bytes. */
/* */
/* SOURCE */
/* DSPLIB. */
/* ------------------------------------------------------------------------ */
/* Copyright (c) 2002 Texas Instruments, Incorporated. */
/* All Rights Reserved. */
/* ======================================================================== */
#ifndef DSP_DOTP_SQR_H_
#define DSP_DOTP_SQR_H_ 1
int DSP_dotp_sqr
(
int G, /* Sum-of-y-squared initial value */
const short *x, /* First input array. */
const short *y, /* Second input array. */
int *restrict r, /* Accumulation of x[] * y[]. */
int nx /* Length of the input vector. */
);
#endif
/* ======================================================================== */
/* End of file: dsp_dotp_sqr.h */
/* ------------------------------------------------------------------------ */
/* Copyright (c) 2002 Texas Instruments, Incorporated. */
/* All Rights Reserved. */
/* ======================================================================== */