fftdef.h

ADI TS系列的DSP FFT源代码

//***********************************************************************
//      Defines for the FFT routines for TigerSHARC family of processors
//      FFTDef.h
//***********************************************************************

#if !defined(__FFTDEF_H_)
#define __FFTDEF_H_

//************************************ Macros ***************************

#define mPUSHQ(arg) \
  Q[k27 += -4] = arg;;

#define mPOPQ(arg) \
  k27 = k27 + 4;;  \
  arg = Q[k27 += 0];;

#define mENTER \
  j26 = j27 - 0x40; k26 = k27 - 0x40;; \
  [j27 += 0xFFFFFFF4] = cJMP; k27 = k27 - 0x04;;

#define mRETURN \
  cjmp = [j26 + 0x40];; \
  cjmp(ABS)(NP); j27:24 = Q[j26 + 0x44]; k27:24 = Q[k26 + 0x44];;


//***********************************************************************
/*here N and the fft type must be defined.
-N represents the number of input complex points of the fft
-The fft type is always complex
-N may be 32, 64, ..., 16384 for TS201 and 32, 64,..., 4096 for TS101
-for all other cases, an error message is shown on the screen after the project is built
*/

#define N 				1024			// Complex FFT size
//***********************************************************************

#if N==32
    #define	MAX_FFT_SIZE	32
    #define outbuff_size 64
#elif N==64
    #define	MAX_FFT_SIZE	64
    #define outbuff_size 128
#elif N==128
    #define	MAX_FFT_SIZE	128
    #define outbuff_size 256
#elif N==256
    #define	MAX_FFT_SIZE	256
    #define outbuff_size 512
#elif N==512
    #define	MAX_FFT_SIZE	512
    #define outbuff_size 1024
#elif N==1024
    #define	MAX_FFT_SIZE	1024
    #define outbuff_size 2048
#elif N==2048
    #define	MAX_FFT_SIZE	2048
    #define outbuff_size 4096
#elif N==4096
    #define	MAX_FFT_SIZE	4096
    #define outbuff_size 8192
#elif N==8192
    #ifdef __ADSPTS201__
        #define	MAX_FFT_SIZE	8192
        #define outbuff_size 16384
    #else
        #define initialization_error
        #define outbuff_size 8192
        #define	MAX_FFT_SIZE	8192
    #endif
#elif N==16384
    #ifdef __ADSPTS201__
        #define	MAX_FFT_SIZE	16384
        #define outbuff_size 32768
    #else
        #define initialization_error
        #define outbuff_size 8192
        #define	MAX_FFT_SIZE	8192
    #endif
#elif N==32768
    #ifdef __ADSPTS201__
        #define initialization_error
        #define outbuff_size 8192
        #define	MAX_FFT_SIZE	8192
    #else
        #define initialization_error
        #define outbuff_size 16384
        #define	MAX_FFT_SIZE	16384
    #endif
#else
    #define initialization_error
    #define	MAX_FFT_SIZE	8192
    #define outbuff_size 8192
#endif

#endif //__FFTDEF_H_