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| #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;
| }
| }
|
|
