Diff: cmsis_dsp/FilteringFunctions/arm_fir_fast_q31.c

Revision:

5:3762170b6d4d

Parent:

3:7a284390b0ce

--- a/cmsis_dsp/FilteringFunctions/arm_fir_fast_q31.c	Mon Jun 23 09:30:09 2014 +0100
+++ b/cmsis_dsp/FilteringFunctions/arm_fir_fast_q31.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_fir_fast_q31.c    
@@ -138,10 +138,10 @@
     while(i > 0u)
     {
       /* Read the b[numTaps] coefficient */
-      c0 = *(pb++);
+      c0 = *pb;
 
       /* Read x[n-numTaps-3] sample */
-      x3 = *(px++);
+      x3 = *px;
 
       /* acc0 +=  b[numTaps] * x[n-numTaps] */
       multAcc_32x32_keep32_R(acc0, x0, c0);
@@ -156,10 +156,10 @@
       multAcc_32x32_keep32_R(acc3, x3, c0);
 
       /* Read the b[numTaps-1] coefficient */
-      c0 = *(pb++);
+      c0 = *(pb + 1u);
 
       /* Read x[n-numTaps-4] sample */
-      x0 = *(px++);
+      x0 = *(px + 1u);
 
       /* Perform the multiply-accumulates */      
       multAcc_32x32_keep32_R(acc0, x1, c0);
@@ -168,10 +168,10 @@
       multAcc_32x32_keep32_R(acc3, x0, c0);
 
       /* Read the b[numTaps-2] coefficient */
-      c0 = *(pb++);
+      c0 = *(pb + 2u);
 
       /* Read x[n-numTaps-5] sample */
-      x1 = *(px++);
+      x1 = *(px + 2u);
 
       /* Perform the multiply-accumulates */      
       multAcc_32x32_keep32_R(acc0, x2, c0);
@@ -180,16 +180,22 @@
       multAcc_32x32_keep32_R(acc3, x1, c0);
 
       /* Read the b[numTaps-3] coefficients */
-      c0 = *(pb++);
+      c0 = *(pb + 3u);
 
       /* Read x[n-numTaps-6] sample */
-      x2 = *(px++);
+      x2 = *(px + 3u);
 
       /* Perform the multiply-accumulates */      
       multAcc_32x32_keep32_R(acc0, x3, c0);
       multAcc_32x32_keep32_R(acc1, x0, c0);
       multAcc_32x32_keep32_R(acc2, x1, c0);
       multAcc_32x32_keep32_R(acc3, x2, c0);
+
+      /* update coefficient pointer */
+      pb += 4u;
+      px += 4u;
+      
+      /* Decrement the loop counter */
       i--;
     }