very large fft例程中汇编函数的功能

lfft文件来源：

www.deyisupport.com/.../67467.aspx  

想知道以下用汇编写的函数的具体功能。 

void transpose_2Cols_rowsX8_cplxMatrix_sa ( float *pIn, float *pOut, Uint32 rows );
void transpose_2Rows_8XCols_cplxMatrix_sa ( float *pIn, float *pOut, Uint32 cols );

void DSPF_sp_mixedRadix_fftSPxSP( Uint32 n, float *pIn, float *pTwiddle, float *pOut );

void DSPF_sp_mixedRadix_fftSPxSP( Uint32 n, float *pIn, float *pTwiddle, float *pOut );

void multTwiddle_vec_1_sa( float *pInTwiddle, float wStepRe, float wStepIm, int fftSize, float *pOutTwiddle );