Implement arm_rfft_fast_init_f32 with new separate initialize functions.

Source/TransformFunctions/arm_rfft_fast_init_f32.c

@@ -247,76 +247,40 @@ arm_status arm_rfft_fast_init_f32(
   arm_rfft_fast_instance_f32 * S,
   uint16_t fftLen)
 {
-  arm_cfft_instance_f32 * Sint;
-  /*  Initialise the default arm status */
-  arm_status status = ARM_MATH_SUCCESS;
-  /*  Initialise the FFT length */
-  Sint = &(S->Sint);
-  Sint->fftLen = fftLen/2;
-  S->fftLenRFFT = fftLen;
+  typedef arm_status(*fft_init_ptr)( arm_rfft_fast_instance_f32 *);
+  fft_init_ptr fptr = 0x0;
 
-  /*  Initializations of structure parameters depending on the FFT length */
-  switch (Sint->fftLen)
+  switch (fftLen)
   {
+  case 4096U:
+    fptr = arm_rfft_4096_fast_init_f32;
+    break;
   case 2048U:
-    /*  Initializations of structure parameters for 2048 point FFT */
-    /*  Initialise the bit reversal table length */
-    Sint->bitRevLength = ARMBITREVINDEXTABLE_2048_TABLE_LENGTH;
-    /*  Initialise the bit reversal table pointer */
-    Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable2048;
-    /*  Initialise the Twiddle coefficient pointers */
-		Sint->pTwiddle     = (float32_t *) twiddleCoef_2048;
-		S->pTwiddleRFFT    = (float32_t *) twiddleCoef_rfft_4096;
+    fptr = arm_rfft_2048_fast_init_f32;
     break;
   case 1024U:
-    Sint->bitRevLength = ARMBITREVINDEXTABLE_1024_TABLE_LENGTH;
-    Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable1024;
-		Sint->pTwiddle     = (float32_t *) twiddleCoef_1024;
-		S->pTwiddleRFFT    = (float32_t *) twiddleCoef_rfft_2048;
+    fptr = arm_rfft_1024_fast_init_f32;
     break;
   case 512U:
-    Sint->bitRevLength = ARMBITREVINDEXTABLE_512_TABLE_LENGTH;
-    Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable512;
-		Sint->pTwiddle     = (float32_t *) twiddleCoef_512;
-		S->pTwiddleRFFT    = (float32_t *) twiddleCoef_rfft_1024;
+    fptr = arm_rfft_512_fast_init_f32;
     break;
   case 256U:
-    Sint->bitRevLength = ARMBITREVINDEXTABLE_256_TABLE_LENGTH;
-    Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable256;
-		Sint->pTwiddle     = (float32_t *) twiddleCoef_256;
-		S->pTwiddleRFFT    = (float32_t *) twiddleCoef_rfft_512;
+    fptr = arm_rfft_256_fast_init_f32;
     break;
   case 128U:
-    Sint->bitRevLength = ARMBITREVINDEXTABLE_128_TABLE_LENGTH;
-    Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable128;
-		Sint->pTwiddle     = (float32_t *) twiddleCoef_128;
-		S->pTwiddleRFFT    = (float32_t *) twiddleCoef_rfft_256;
+    fptr = arm_rfft_128_fast_init_f32;
     break;
   case 64U:
-    Sint->bitRevLength = ARMBITREVINDEXTABLE_64_TABLE_LENGTH;
-    Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable64;
-		Sint->pTwiddle     = (float32_t *) twiddleCoef_64;
-		S->pTwiddleRFFT    = (float32_t *) twiddleCoef_rfft_128;
+    fptr = arm_rfft_64_fast_init_f32;
     break;
   case 32U:
-    Sint->bitRevLength = ARMBITREVINDEXTABLE_32_TABLE_LENGTH;
-    Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable32;
-		Sint->pTwiddle     = (float32_t *) twiddleCoef_32;
-		S->pTwiddleRFFT    = (float32_t *) twiddleCoef_rfft_64;
-    break;
-  case 16U:
-    Sint->bitRevLength = ARMBITREVINDEXTABLE_16_TABLE_LENGTH;
-    Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable16;
-		Sint->pTwiddle     = (float32_t *) twiddleCoef_16;
-		S->pTwiddleRFFT    = (float32_t *) twiddleCoef_rfft_32;
-    break;
-  default:
-    /*  Reporting argument error if fftSize is not valid value */
-    status = ARM_MATH_ARGUMENT_ERROR;
+    fptr = arm_rfft_32_fast_init_f32;
     break;
   }
 
-  return (status);
+  if( ! fptr ) return ARM_MATH_ARGUMENT_ERROR;
+  return fptr( S );
+
 }
 
 /**