;* ======================================================================== *;
;* TEXAS INSTRUMENTS, INC. *;
;* *;
;* DSPLIB DSP Signal Processing Library *;
;* *;
;* Release: Version 1.02 *;
;* CVS Revision: 1.4 Fri Mar 22 01:54:29 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_q15tofl -- Q.15 to IEEE float conversion *
* *
* REVISION DATE *
* 17-Jul-2001 *
* *
* USAGE *
* This routine is C-callable and can be called as: *
* *
* void DSP_q15tofl (short *x, float *r, int nx) *
* *
* x[nx] --- Pointer to Q15 input vector of size nx *
* r[nx] --- Pointer to floating-point output data vector *
* of size nx containing the floating-point equivalent *
* of vector input *
* nx --- length of input and output data vectors *
* *
* DESCRIPTION *
* Converts the Q15 stored in vector input to IEEE floating point *
* numbers stored in vector output. *
* *
* void DSP_q15tofl (short *x, float *r, int nx) *
* { *
* int i; *
* *
* for (i=0;i<nx;i++) *
* r[i]=(float)x[i]/0x8000; *
* } *
* *
* The above C code is a general implementation without *
* restrictions. The assembly code may have some restrictions, as *
* noted below. *
* *
* TECHNIQUES *
* unrolled loop 2x *
* *
* ASSUMPTIONS *
* nx must be a multiple of 2 *
* *
* MEMORY NOTE *
* no bank conflicts occur ever *
* *
* NOTES *
* this routine is interrupt-tolerant but not interruptible *
* this routine is ENDIAN NEUTRAL *
* *
* CYCLES *
* 5/2 * nx + 18 *
* *
* CODESIZE *
* 288 bytes *
* ------------------------------------------------------------------------- *
* Copyright (c) 2002 Texas Instruments, Incorporated. *
* All Rights Reserved. *
* ========================================================================= *
.global _DSP_q15tofl
* ========================================================================= *
* End of file: dsp_q15tofl.h62 *
* ------------------------------------------------------------------------- *
* Copyright (c) 2002 Texas Instruments, Incorporated. *
* All Rights Reserved. *
* ========================================================================= *