Hi,

I am a newbie in roccc therefore I apologize in advance for any trivial question I may ask.

I am working on a code for realize a 8 bit Discrete Cosine Tranform, thus I wrote the four modules of the butterfly and the system that calls them. I can compile with no errors all the four modules, however when compiling the system I get the follwoing error:

"

Lo Cirrf compilation failed

hi_cirrf.c: In function ‘DCT’:

hi_cirrf.c:71: warning: assignment from incompatible pointer type

hi_cirrf.c:72: warning: assignment from incompatible pointer type

INTERNAL ERROR - UndefDetectionPass.cpp: Detected undef in call void @ROCCCInvokeHardware0( i8* getelementptr ([5 x i8]* @.str, i32 0, i32 0), float %suifTmp0162250, float %suifTmp1163217, float %suifTmp3165211, float %suifTmp4166204, float %i6120206, float %i7121208, float undef, float %iw2127226, float %i2179321, float %i5180322, float %iw0129229, float %iw3126223, float %iw4125220, float %iw5124309, float %iw6123308, float %iw7122307 ) nounwind 

opt: UndefDetectionPass.cpp:62: virtual bool llvm::UndefDetectionPass::runOnFunction(llvm::Function&): Assertion `0 and "Undef found!"' failed.

/home/davide/Desktop/roccc-0.4-distribution/Install/roccc-compiler/src/../bin/compile_llvmtovhdl.sh: line 4:  3515 Aborted                 /home/davide/Desktop/roccc-0.4-distribution/Install/roccc-compiler/src/llvm-2.3//Release/bin/opt -load /home/davide/Desktop/roccc-0.4-distribution/Install/roccc-compiler/src/llvm-2.3//Release/lib/FloatPass.so.0 -load /home/davide/Desktop/roccc-0.4-distribution/Install/roccc-compiler/src/llvm-2.3//Release/lib/PipelinePass.so.0 -load /home/davide/Desktop/roccc-0.4-distribution/Install/roccc-compiler/src/llvm-2.3//Release/lib/VHDLOutput.so.0 -load /home/davide/Desktop/roccc-0.4-distribution/Install/roccc-compiler/src/llvm-2.3//Release/lib/RocccIntrinsic.so.0 -renameMem -mem2reg -ROCCCfloat -undefDetect -rocccCFGtoDFG -pipeline -insertCopy -loadRemoval -arrayNorm -vhdl -f -o /dev/null < $1.bc

"

None of the optimization flags have been checked for any module nor the system.

I tried to compile the example that does the FFT and it works fine for both modules and system.

Below there are each of the four modules' code

DCT1.c :

"

typedef struct

{

//inputs

float i0_in ;

float i1_in ;

float i2_in ;

float i3_in ;

float i4_in ;

float i5_in ;

float i6_in ;

float i7_in ;

//outputs

float o0_out ;

float o1_out ;

float o2_out ;

float o3_out ;

float o4_out ;

float o5_out ;

float o6_out ;

float o7_out ;

} DCT1_t ;

DCT1_t DCT1(DCT1_t t)

{

t.o0_out = t.i0_in + t.i7_in ;

t.o1_out = t.i1_in + t.i6_in ;

t.o2_out = t.i2_in + t.i5_in ;

t.o3_out = t.i3_in + t.i4_in ;

t.o4_out = t.i3_in - t.i4_in ;

t.o5_out = t.i2_in - t.i5_in ;

t.o6_out = t.i1_in - t.i6_in ;

t.o7_out = t.i0_in - t.i7_in ;

return t ;

}

"

DCT2.c :

"

typedef struct

{

//inputs

float i0_in ;

float i1_in ;

float i2_in ;

float i3_in ;

float i4_in ;

float i5_in ;

float i6_in ;

float i7_in ;

//Coefficent

float w0_in;

float w1_in;

float w2_in;

float w3_in;

//outputs

float o0_out ;

float o1_out ;

float o2_out ;

float o3_out ;

float o4_out ;

float o5_out ;

float o6_out ;

float o7_out ;

} DCT2_t ;

DCT2_t DCT2(DCT2_t t)

{

t.o0_out = t.i0_in + t.i3_in ;

t.o1_out = t.i1_in + t.i2_in ;

t.o2_out = t.i1_in - t.i2_in ;

t.o3_out = t.i0_in - t.i3_in ;

t.o4_out = t.i4_in*t.w0_in + t.i7_in*t.w1_in ;

t.o5_out = t.i5_in*t.w2_in + t.i6_in*t.w3_in ;

t.o6_out = t.i6_in*t.w2_in - t.i5_in*t.w3_in ;

t.o7_out = t.i7_in*t.w0_in - t.i4_in*t.w1_in ;

return t ;

}

"

DCT3.c :

"

typedef struct

{

//inputs

float i0_in ;

float i1_in ;

float i2_in ;

float i3_in ;

float i4_in ;

float i5_in ;

float i6_in ;

float i7_in ;

//Coefficent

float w0_in;

float w1_in;

//outputs

float o0_out ;

float o1_out ;

float o2_out ;

float o3_out ;

float o4_out ;

float o5_out ;

float o6_out ;

float o7_out ;

} DCT3_t ;

DCT3_t DCT3(DCT3_t t)

{

t.o0_out = t.i0_in + t.i1_in ;

t.o1_out = t.i0_in - t.i1_in ;

t.o2_out = t.i2_in*t.w0_in + t.i3_in*t.w1_in ;

t.o3_out = t.i3_in*t.w0_in - t.i2_in*t.w1_in ;

t.o4_out = t.i4_in + t.i6_in ;

t.o5_out = t.i7_in - t.i5_in ;

t.o6_out = t.i6_in - t.i4_in ;

t.o7_out = t.i5_in + t.i7_in ;

return t ;

}

"

DCT4.c :

"

typedef struct

{

//inputs

float i0_in ;

float i1_in ;

float i2_in ;

float i3_in ;

float i4_in ;

float i5_in ;

float i6_in ;

float i7_in ;

//Coefficent

float w0_in;

//outputs

float o0_out ;

float o1_out ;

float o2_out ;

float o3_out ;

float o4_out ;

float o5_out ;

float o6_out ;

float o7_out ;

} DCT4_t ;

DCT4_t DCT4(DCT4_t t)

{

t.o0_out = t.i0_in ;

t.o1_out = t.i1_in ;

t.o2_out = t.i2_in ;

t.o3_out = t.i3_in ;

t.o4_out = t.i7_in - t.i4_in ;

t.o5_out = t.i5_in*t.w0_in ;

t.o6_out = t.i6_in*t.w0_in ;

t.o7_out = t.i4_in + t.i7_in ;

return t ;

}

"

And the system code:

DCT.c:

"

#include "roccc-library.h"

void DCT()

{

float A[100];

float B[100];

float i0;

float i1;

float i2;

float i3;

float i4;

float i5;

float i6;

float i7;

float iw0;

float iw1;

float iw2;

float iw3;

float iw4;

float iw5;

float iw6;

float iw7;

float iw8;

float iw9;

float iw10;

float iw11;

float iw12;

float iw13;

float iw14;

float iw15;

float iw16;

float iw17;

float iw18;

float iw19;

float iw20;

float iw21;

float iw22;

float iw23;

float o0;

float o1;

float o2;

float o3;

float o4;

float o5;

float o6;

float o7;

//constants

float w21= 0.83147;

float w22= 0.55557;

float w23= 0.98078;

float w24= 0.19509;

float w31= 1.3870;

float w32= 0.2759;

float w41= 1.4142;

int i;

for (i = 0 ; i < 100 ; i+=8)

{

i0=A[i];

i1=A[i+1];

i2=A[i+2];

i3=A[i+3];

i4=A[i+4];

i5=A[i+5];

i6=A[i+6];

i7=A[i+7];

// DCT<number> indicates the <number>-th stage of the DCT

DCT1(i0,i1,i2,i3,i4,i5,i6,i7, // inputs

iw0,iw1,iw2,iw3,iw4,iw5,iw6,iw7); // outputs

DCT2(iw0,iw1,iw2,iw3,iw4,iw5,iw6,iw7, // inputs

w21,w22,w23,w24, // coefficents

iw8,iw9,iw10,iw11,iw12,iw13,iw14,iw15); // outputs

DCT3(iw8,iw9,iw10,iw11,iw12,iw13,iw14,iw15, // inputs

w31,w32, // coefficents

iw16,iw17,iw18,iw19,iw20,iw21,iw22,iw23); // outputs

DCT4(iw16,iw17,iw18,iw19,iw20,iw21,iw22,iw23, // inputs

w41, // coefficents

o0,o1,o2,o3,o4,o5,o6,o7); // outputs

B[i] = o0;

B[i+1] = o1;

B[i+2] = o2;

B[i+3] = o3;

B[i+4] = o4;

B[i+5] = o5;

B[i+6] = o6;

B[i+7] = o7;

}

}

"

The ROCCC installation is under Ubutnu linux 9.10 OS.

Many thanks in advance for any answer.

Davide Barcelli