;* ======================================================================== *;
;* TEXAS INSTRUMENTS, INC. *;
;* *;
;* DSPLIB DSP Signal Processing Library *;
;* *;
;* Release: Version 1.02 *;
;* CVS Revision: 1.4 Sun Mar 10 00:53:48 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_maxidx *
* *
* REVISION DATE *
* 28-Jan-2002 *
* *
* USAGE *
* This routine is C-callable and can be called as: *
* *
* int DSP_maxidx(const short x[], int nx) *
* *
* x[] : Vector array *
* nx : Number of elements in x[] *
* *
* DESCRIPTION *
* This routine finds the max value of a vector and returns the index *
* of the value. In case of ties the smallest index is returned. *
* *
* C CODE *
* int DSP_maxidx(const short x[], int nx) *
* { *
* int max, index, i; *
* *
* max = -32768; *
* index = 0; *
* *
* for (i = 0; i < nx; i++) *
* if (x[i] > max) *
* { *
* max = x[i]; *
* index = i; *
* } *
* return index; *
* } *
* *
* TECHNIQUES *
* The loop is unrolled three times. *
* After finding a new max value, multiply units are used to move *
* value between registers. *
* *
* ASSUMPTIONS *
* nx is a multiple of 3 and >= 3 *
* *
* MEMORY NOTE *
* No memory bank hits under any conditions. *
* *
* NOTE *
* This code is ENDIAN NEUTRAL. *
* This code is interrupt-tolerant but not interruptible. *
* *
* CYCLES *
* 2 * nx/3 + 13 *
* *
* for nx = 108, cycles = 85 *
* *
* CODESIZE *
* 224 bytes *
* *
* ------------------------------------------------------------------------- *
* Copyright (c) 2002 Texas Instruments, Incorporated. *
* All Rights Reserved. *
* ========================================================================= *
.global _DSP_maxidx
* ========================================================================= *
* End of file: dsp_maxidx.h62 *
* ------------------------------------------------------------------------- *
* Copyright (c) 2002 Texas Instruments, Incorporated. *
* All Rights Reserved. *
* ========================================================================= *