sine sosine

In my case (on C6416)

 {
         #define PI 3.14159

        double a;

         a = sin(45 * PI / 180);     // a gives the result 0.785 instead of 0.707 .
         LOG_printf(&trace, "%f", a);
         a = sin(30 * PI / 180);     // a gives the result 0.523 instead of 0.5
         LOG_printf(&trace, "%f", a);
 }

prints

0.707106
0.500000

So your trouble is elsewhere...

Hi.

Is it possible to get the project ,

It will be easier for me to debug.

Thanks.

I inserted mentioned lines just in my working project and shown you the output. My project is DSP/BIOS application for C6416, so it will not help you anyway.

3513.testSinCos.zipEphraim,

I created a project with similar file as rrlagic did.  This is for a 64x+ target.  I'm not sure which variant you are working on. This is a CCSv5 project.

The .c file looks like this

#include <stdio.h>
#include <c6x.h>
#include <math.h>

#define PI 3.14159

void main(){

    double a;

    a = sin(45 * PI / 180);  
    printf("%f\n", a);
    a = sin(30 * PI / 180); 
    printf("%f\n", a);

}

And the resulting stdio output in CCS is

[C64XP_0] 0.707106
[C64XP_0] 0.500000

I've attached a version of the project.  What version of the compiler are you using?  What build options? I would check those first.

Regards,

Dan

Hi.

Problem solved,

Thanks

What was the cause?

Thanks,

Dan

Hi.

I have stripped all unnecessary arrays .

It was one of them to cause the problem.

Bye.