Short answer is - yes. You can call ASM from C and get all the so-called hand-optimizations. Restrcitions are probably related to array alignment in memory. The hand coded ASM assumes particluar alignment so the LDDW instructions can be used. - Andrew E. dukke3d wrote: >Hello I'm trying to simulate an FFT and an iFFT (with code composer >studio)using functions in DSPlib, in particular i'm using >DSPF_sp_fftSPxSP function. I have made to work with success the >following code: > >#define CHIP_6711C >#include <stdio.h> >#include <stdlib.h> >#include <csl.h> >#include <csl_timer.h> >#include <math.h> > >#include "twiddleSPxSP4096.h" >#include "brev_table.h" > >#define PI (3.141592654) >#define NN (4096) > >float x[2 * NN]; >float y[2 * NN]; > >void main(void) >{ > int i; > int k; > int j; > short F1 = 10, F2 = 40; > /* >==================================================================== >*/ > /* Generate input >data */ > /* >==================================================================== >*/ > for(i=0; i<NN; i++) > { > /* real part */ > x[2 * i] = (sin(2 * PI * F1 * i / NN) + sin(2 * PI * F2 * i / NN)); > /* img part */ > x[2 * i + 1] = 0; > } > >DSPF_sp_fftSPxSP (NN, x ,w , y , brev ,4 ,0 ,NN); > >DSPF_sp_ifftSPxSP (NN, y ,w , x , brev ,4,0 ,NN); >} > >In "TMS320C67x DSP Library Programmer's Reference Guide"(spra657b)I >have read that "the c code of the functions is the equivalent of the >assembly code without restrictions" and that "the assembly code is >hand optimized and restrictions may apply". >What does it means? >If I call the functions as you can see in the program above,am I >using the hand optimized assembler routines or not? >In other words, simply calling the Dsplib functions with the c >language am I using the optimized code?

Hello I'm trying to simulate an FFT and an iFFT (with code composer studio)using functions in DSPlib, in particular i'm using DSPF_sp_fftSPxSP function. I have made to work with success the following code: #define CHIP_6711C #include <stdio.h> #include <stdlib.h> #include <csl.h> #include <csl_timer.h> #include <math.h> #include "twiddleSPxSP4096.h" #include "brev_table.h" #define PI (3.141592654) #define NN (4096) float x[2 * NN]; float y[2 * NN]; void main(void) { int i; int k; int j; short F1 = 10, F2 = 40; /* ==================================================================== */ /* Generate input data */ /* ==================================================================== */ for(i=0; i<NN; i++) { /* real part */ x[2 * i] = (sin(2 * PI * F1 * i / NN) + sin(2 * PI * F2 * i / NN)); /* img part */ x[2 * i + 1] = 0; } DSPF_sp_fftSPxSP (NN, x ,w , y , brev ,4 ,0 ,NN); DSPF_sp_ifftSPxSP (NN, y ,w , x , brev ,4,0 ,NN); } In "TMS320C67x DSP Library Programmer's Reference Guide"(spra657b)I have read that "the c code of the functions is the equivalent of the assembly code without restrictions" and that "the assembly code is hand optimized and restrictions may apply". What does it means? If I call the functions as you can see in the program above,am I using the hand optimized assembler routines or not? In other words, simply calling the Dsplib functions with the c language am I using the optimized code?