;* ======================================================================== *;
;* TEXAS INSTRUMENTS, INC. *;
;* *;
;* DSPLIB DSP Signal Processing Library *;
;* *;
;* Release: Version 1.02 *;
;* CVS Revision: 1.4 Sun Mar 10 00:34:40 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_fltoq15 *
* *
* REVISION DATE *
* 27-Jul-2001 *
* *
* USAGE *
* This routine is C-callable and can be called as: *
* *
* void DSP_fltoq15 *
* ( *
* const float *restrict x, *
* short *restrict r, *
* int nx *
* ); *
* *
* x[nx] : Pointer to values of type float *
* r[nx] : Contains Q15 values of x[nx] *
* nx : Number of elements in arrays *
* *
* DESCRIPTION *
* Convert the IEEE floating point numbers stored in vector x[] into *
* Q.15 format numbers stored in vector r[]. Results will be rounded *
* towards negative infinity. All values that exceed the size limit *
* will be saturated to 0x7fff if value is positive and 0x8000 if *
* value is negative. *
* *
* C CODE *
* void DSP_fltoq15 *
* ( *
* const float *restrict x, *
* short *restrict r, *
* int nx *
* ) *
* { *
* int i, a; *
* *
* for(i = 0; i < nx; i++) *
* { *
* a = floor(32768 * x[i]); *
* *
* // saturate to 16-bit // *
* if (a>32767) a = 32767; *
* if (a<-32768) a = -32768; *
* *
* r[i] = (short) a; *
* } *
* } *
* *
* TECHNIQUES *
* Loop is unrolled twice. *
* Collapsed 1 epilog stage, 2 prolog stages *
* *
* ASSUMPTIONS *
* nx >= 2 and a multiple of 2 *
* *
* NOTES *
* This code is interrupt-tolerant but not interruptible. *
* This implementation is ENDIAN NEUTRAL. *
* *
* CYCLES *
* 7 * nx/2 + 12 *
* *
* CODESIZE *
* 320 bytes *
* *
* ------------------------------------------------------------------------- *
* Copyright (c) 2002 Texas Instruments, Incorporated. *
* All Rights Reserved. *
* ========================================================================= *
.global _DSP_fltoq15
* ========================================================================= *
* End of file: dsp_fltoq15.h62 *
* ------------------------------------------------------------------------- *
* Copyright (c) 2002 Texas Instruments, Incorporated. *
* All Rights Reserved. *
* ========================================================================= *