Intel HLS example reports

dear Anand,

waiting for your helpful reply... thanks

Hi,

1.What for the below lines are used and where is the function?

--- Quote Start ---

//call reference function

ref_sol(a, b, &ref_res);

--- Quote End ---

2.How "check results" session of code works?

With few modification I have compiled the code.

#include "HLS/hls.h"
# include <stdio.h>
# include "HLS/ac_int.h"
# include "HLS/ac_fixed.h"
# include "HLS/extendedmath.h"
# include "HLS/math.h"
using namespace ihc;
component void sol (int a, int b, int *dout)
{
int i;
int acc= 0;
int a_reg, b_reg, sub, sub2;
//int N=10;
for(i=0; i<sizeof(a); i++)
{
# pragma HLS PIPELINE II=1
a_reg = a;
b_reg = b;
sub = a_reg - b_reg;
sub2 = sub*sub;
acc += sub2;
}
*dout = acc;
}
int main(void)
{
int i, k, cnt;
int ret_val = 0;
int N=10;
int a, b;
int aa, bb;
long long int ref_res;
int res;
cnt = 0;
//create random data
for(i=0; i<N; i++)
{
a = rand() % (1024*16);
b = rand() % (1024*16);
aa = (int) a;
bb = (int) b;
}
//call design Under Test
sol( aa, bb, &res);
return ret_val;
}

VisualStudio's link.exe is not on the path. Guessing its location.
VS100COMNTOOLS environment variable is set to c:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\Tools\.
Looks like you have VisualStudio2010 installed. Using it.
Setting environment for using Microsoft Visual Studio 2010 x64 tools.
Adding c:\intelFPGA_pro\17.1\hls\bin to PATH
Adding c:\intelFPGA_pro\17.1\hls\host\windows64\bin to PATH
c:\intelFPGA_pro\17.1\hls>cd c:\Users\anandr1x\Desktop\hls\u
The system cannot find the path specified.
c:\intelFPGA_pro\17.1\hls>cd c:\Users\anandr1x\Desktop\hls\userhls
c:\Users\x\Desktop\hls\userhls>build.bat test-x86-64
i++  -march=x86-64 sol.cpp -o test-x86-64.exe
sol.cpp:17:18: warning: sizeof on array function parameter will return size of 'int *' instead of 'int '
      
for(i=0; i<sizeof(a); i++)
                 ^
sol.cpp:11:25: note: declared here
component void sol (int a, int b, int *dout)
                        ^
1 warning generated.
Run test-x86-64.exe to execute the test.
c:\Users\x\Desktop\hls\userhls>build.bat test-fpga
i++  -march=Arria10 sol.cpp -o test-fpga.exe
sol.cpp:17:18: warning: sizeof on array function parameter will return size of 'int *' instead of 'int '
      
for(i=0; i<sizeof(a); i++)
                 ^
sol.cpp:11:25: note: declared here
component void sol (int a, int b, int *dout)
                        ^
1 warning generated.
sol.cpp:17:18: warning: sizeof on array function parameter will return size of 'int *' instead of 'int '
      
for(i=0; i<sizeof(a); i++)
                 ^
sol.cpp:11:25: note: declared here
component void sol (int a, int b, int *dout)
                        ^
1 warning generated.
Error: Cannot remove ./test-fpga.prj: Can't remove file ./test-fpga.prj/quartus: Permission denied
Run test-fpga.exe to execute the test.

let me know if this has helped resolve the issue you are facing or if you need any further assistance.

please open a new thread if question does not matches with the thread title

Best Regards,

Anand Raj Shankar

(This message was posted on behalf of Intel Corporation)

Dear Anand,

thanks for your reply....sorry for the confusion and messing things up....I have posted three codes below under headings SOURCE file, HEADER and TEST BENCH. This will definitely give you the whole idea.

Regarding your question ".What for the below lines are used and where is the function? " please check the third code under TEST BENCH.

Regarding your question "How check results session of code works?" also please check the third code under TEST BENCH.

SOURCE file

# include "../src/diff_sq_acc.h"

void diff_sq_acc(din_t a[N], din_t b[N], dout_t *dout)

{

unsigned char i;

float acc= 0;

float a_reg, b_reg, sub, sub2;

diff_sq_acc_label0:for(i=0; i<N; i++)

{

a_reg = a;

b_reg = b;

sub = a_reg - b_reg;

sub2 = sub*sub;

acc += sub2;

}

*dout = acc;

}

HEADER

# ifndef H_SQRT_ACC_H# define H_SQRT_ACC_H

# include <stdlib.h># include "ap_int.h"

typedef float din_t;

typedef float dout_t;

# define N 100

void diff_sq_acc(din_t a[N], din_t b[N], dout_t *dout);

# endif //#ifndef H_SQRT_ACC_H

TEST BENCH

# include <stdio.h># include "../src/diff_sq_acc.h"

void ref_diff_sq_acc(int a[N], int b[N], long long int *dout)

{

int i;

long long int acc = 0;

int diff;

long long int diff2;

for(i=0; i<N; i++)

{

diff = a-b;

diff2 = (long long int) diff * (long long int) diff;

acc += diff2;

}

*dout = acc;

}

int main(void)

{

int i, k, cnt;

int ret_val = 0;

int a[N], b[N];

din_t aa[N], bb[N];

long long int ref_res;

dout_t res;

cnt = 0;

for (k=0; k<10; k++)

{

//create random data

for(i=0; i<N; i++)

{

a = rand() % (1024*16);

b = rand() % (1024*16);

aa = (din_t) a;

bb = (din_t) b;

}

//call reference function

ref_diff_sq_acc(a, b, &ref_res);

//call design Under Test

diff_sq_acc( aa, bb, &res);

//check results

printf("got %lld expected %lld\n", (long long int) res.to_double(), (long long int) ref_res);

if ( (ref_res - (long long int) res) !=0 ) cnt++;

}

if (cnt>0)

{

printf("TEST FAILED: %d errors\n", cnt);

ret_val = 1;

}

else

{

printf("TEST SUCCESS!\n");

ret_val = 0;

}

return ret_val;

}

Dear Anand,

Can you please attach your whole code with the executable and reports in this thread ? That would be really helpful....

Hi,

Refer the below link

https://drive.google.com/open?id=1bai8bhwpl3rzytqjqkhcdmiecf5ftrju

Best Regards,

Anand Raj Shankar

(This message was posted on behalf of Intel Corporation

Dear Anand,

thanks for the reply....And if I have to use your code for float and fixed data type inputs then ? Basically just to compare the results for fixed and float inputs....in first case if i use it for fixed data input and in second case if I use for float input ? Can you please help me with these two data types in the same code.... ?

And one more question.....

If I use the data type float in the same code, please recommend me what should be the exact representation of ac_fixed <W,I> in terms of W and I if I want to use the exact code for fixed data type and later compare the results of float and fixed data type. Waiting for your valuable reply....so far you have been a great help.

Dear Anand

While going through AC data types used by Intel HLS, I have written the same code in terms of ac_fixed data types below. I will be really grateful if you can run and synthesize at your end. Thanks in advance......you have been so far very helpful.....

void diff_sq_acc( ac_ufixed<11,1> a[N], ac_ufixed<11,1> b[N], ac_ufixed<28,8> *dout)

{

unsigned char i;

ac_ufixed<28,8> acc= 0;

ac_ufixed<11,1> a_reg, b_reg;

ac_fixed<12,2> sub;

ac_ufixed<21,1> sub2 ;

for(i=0; i<N; i++)

{

# pragma HLS PIPELINE II=1

a_reg = a;

b_reg = b;

sub = a_reg - b_reg;

sub2 = sub*sub;

acc += sub2;

}

*dout = acc;

}

Dear Anand,

as always waiting for your valuable reply and help.... thanks

Hi,

1.To get the difference between float and fixed data type you can use the tutorials the installation directory.

"..\intelFPGA_pro\17.1\hls\examples\tutorials"

2.Create simple project like multiplication to understand the difference.

#include "HLS/hls.h"# include <stdio.h># include "HLS/ac_int.h"# include "HLS/ac_fixed.h"# include "HLS/extendedmath.h"# include "HLS/math.h"
typedef ac_int<8, false> fixed_8_t;
typedef ac_int<16, false> fixed_16_t;# define N 2
component void dut(fixed_8_t a, fixed_8_t b, fixed_8_t *dout)
{
unsigned int i;
fixed_16_t acc= 0;
fixed_8_t a_reg, b_reg, sub;
fixed_16_t sub2;
for(i=0; i<N; i++)
{
a_reg = a;
b_reg = b;
sub = a_reg - b_reg;
sub2 = sub*sub;
acc += sub2;
}
*dout = acc;
  
 }
int main() {
 fixed_8_t z;
  fixed_16_t ip = &z;
 fixed_8_t x={128,128};
 fixed_8_t y={128,128};
  dut(x,y,&z);
  printf("%d \n",*ip);
getchar();
  return 0;
}

3.What is the error you are getting from your code, can screenshot and post it?

Best Regards,

Anand Raj Shankar

(This message was posted on behalf of Intel Corporation)