Diff: cmsis_dsp/StatisticsFunctions/arm_std_f32.c

Revision:

5:3762170b6d4d

Parent:

3:7a284390b0ce

--- a/cmsis_dsp/StatisticsFunctions/arm_std_f32.c	Mon Jun 23 09:30:09 2014 +0100
+++ b/cmsis_dsp/StatisticsFunctions/arm_std_f32.c	Fri Nov 20 08:45:18 2015 +0000
@@ -1,8 +1,8 @@
 /* ----------------------------------------------------------------------    
-* Copyright (C) 2010-2013 ARM Limited. All rights reserved.    
+* Copyright (C) 2010-2014 ARM Limited. All rights reserved.    
 *    
-* $Date:        17. January 2013
-* $Revision: 	V1.4.1  
+* $Date:        19. March 2015
+* $Revision: 	V.1.4.5  
 *    
 * Project: 	    CMSIS DSP Library    
 * Title:		arm_std_f32.c    
@@ -86,13 +86,19 @@
   float32_t sumOfSquares = 0.0f;                 /* Sum of squares */
   float32_t in;                                  /* input value */
   uint32_t blkCnt;                               /* loop counter */
-
+   
 #ifndef ARM_MATH_CM0_FAMILY
 
   /* Run the below code for Cortex-M4 and Cortex-M3 */
 
   float32_t meanOfSquares, mean, squareOfMean;
 
+	if(blockSize == 1)
+	{
+		*pResult = 0;
+		return;
+	}
+
   /*loop Unrolling */
   blkCnt = blockSize >> 2u;
 
@@ -158,6 +164,12 @@
   float32_t squareOfSum;                         /* Square of Sum */
   float32_t var;                                 /* Temporary varaince storage */
 
+	if(blockSize == 1)
+	{
+		*pResult = 0;
+		return;
+	}
+
   /* Loop over blockSize number of values */
   blkCnt = blockSize;