From f7de54fc6fa6b40dfa2dfbe4c2a8ee933affa126 Mon Sep 17 00:00:00 2001
From: JanHenrik <janhenrik@janhenrik.org>
Date: Wed, 1 Apr 2020 00:40:03 +0200
Subject: added files

---
 .../RefLibs/src/TransformFunctions/bitreversal.c   | 30 ++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 cdc-dials/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/TransformFunctions/bitreversal.c

(limited to 'cdc-dials/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/TransformFunctions/bitreversal.c')

diff --git a/cdc-dials/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/TransformFunctions/bitreversal.c b/cdc-dials/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/TransformFunctions/bitreversal.c
new file mode 100644
index 0000000..4751821
--- /dev/null
+++ b/cdc-dials/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/TransformFunctions/bitreversal.c
@@ -0,0 +1,30 @@
+#include "ref.h"
+
+
+;/*    
+;* @brief  In-place bit reversal function.   
+;* @param[in, out] *pSrc        points to the in-place buffer of unknown 32-bit data type. 
+;* @param[in]      bitRevLen    bit reversal table length
+;* @param[in]      *pBitRevTab  points to bit reversal table.   
+;* @return none.   
+;*/
+void arm_bitreversal_32(uint32_t *pSrc, uint32_t bitRevLen, uint32_t *pBitRevTab)
+{
+	uint32_t a,b,i,tmp;
+	
+	for(i=0; i<bitRevLen; i++) 
+	{
+		 a = pBitRevTab[2*i];
+		 b = pBitRevTab[2*i + 1];
+
+	//real
+		 tmp = pSrc[a];
+		 pSrc[a] = pSrc[b];
+		 pSrc[b] = tmp;
+
+	//complex
+		 tmp = pSrc[a+1];
+		 pSrc[a+1] = pSrc[b+1];
+		 pSrc[b+1] = tmp;
+	}
+}
-- 
cgit