| #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; |
| } |
| } |