1 files changed, 30 insertions, 0 deletions
diff --git a/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/TransformFunctions/bitreversal.c b/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/TransformFunctions/bitreversal.c
new file mode 100644
index 0000000..b5a4068
--- /dev/null
+++ b/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 ref_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;
+	}
+}