Diff: cmsis_dsp/FastMathFunctions/arm_cos_f32.c

Revision:

3:7a284390b0ce

Parent:

2:da51fb522205

diff -r da51fb522205 -r 7a284390b0ce cmsis_dsp/FastMathFunctions/arm_cos_f32.c
--- a/cmsis_dsp/FastMathFunctions/arm_cos_f32.c	Thu May 30 17:10:11 2013 +0100
+++ b/cmsis_dsp/FastMathFunctions/arm_cos_f32.c	Fri Nov 08 13:45:10 2013 +0000
@@ -1,8 +1,8 @@
 /* ----------------------------------------------------------------------    
-* Copyright (C) 2010 ARM Limited. All rights reserved.    
+* Copyright (C) 2010-2013 ARM Limited. All rights reserved.    
 *    
-* $Date:        15. February 2012  
-* $Revision: 	V1.1.0  
+* $Date:        17. January 2013
+* $Revision: 	V1.4.1
 *    
 * Project: 	    CMSIS DSP Library    
 * Title:		arm_cos_f32.c    
@@ -11,23 +11,31 @@
 *    
 * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
 *  
-* Version 1.1.0 2012/02/15 
-*    Updated with more optimizations, bug fixes and minor API changes.  
-*   
-* Version 1.0.10 2011/7/15  
-*    Big Endian support added and Merged M0 and M3/M4 Source code.   
-*    
-* Version 1.0.3 2010/11/29   
-*    Re-organized the CMSIS folders and updated documentation.    
-*     
-* Version 1.0.2 2010/11/11    
-*    Documentation updated.     
-*    
-* Version 1.0.1 2010/10/05     
-*    Production release and review comments incorporated.    
-*    
-* Version 1.0.0 2010/09/20     
-*    Production release and review comments incorporated.    
+* Redistribution and use in source and binary forms, with or without 
+* modification, are permitted provided that the following conditions
+* are met:
+*   - Redistributions of source code must retain the above copyright
+*     notice, this list of conditions and the following disclaimer.
+*   - Redistributions in binary form must reproduce the above copyright
+*     notice, this list of conditions and the following disclaimer in
+*     the documentation and/or other materials provided with the 
+*     distribution.
+*   - Neither the name of ARM LIMITED nor the names of its contributors
+*     may be used to endorse or promote products derived from this
+*     software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
+* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+* POSSIBILITY OF SUCH DAMAGE.    
 * -------------------------------------------------------------------- */
 
 #include "arm_math.h"
@@ -43,7 +51,8 @@
  * Q15, Q31, and floating-point data types.   
  * The input to the floating-point version is in radians while the   
  * fixed-point Q15 and Q31 have a scaled input with the range   
- * [0 +0.9999] mapping to [0 2*pi), Where range excludes 2*pi.   
+ * [0 +0.9999] mapping to [0 2*pi).  The fixed-point range is chosen so that a
+ * value of 2*pi wraps around to 0.
  *   
  * The implementation is based on table lookup using 256 values together with cubic interpolation.   
  * The steps used are:   
@@ -77,9 +86,10 @@
 
 /**    
 * \par    
-* <b>Example code for Generation of Cos Table:</b>   
+* <b>Example code for Generation of Cos Table:</b>
+* <pre>
 * tableSize = 256;    
-* <pre>for(n = -1; n < (tableSize + 2); n++)    
+* for(n = -1; n < (tableSize + 2); n++)    
 * {    
 *	cosTable[n+1]= cos(2*pi*n/tableSize);    
 * } </pre>