[Question] TI DSP TMS320C31 Errata Report....

[nadamo]

Do you have any Errata Report in code composer from your application or TI about below?
I meet mal-operations in our DSP(TMS320C31) application.
Therefore I don't understand why this mal-operation is occured.

// Code type 1
if((Var&0xF000) == 0x8000)
{
// do action 1
}
else
{
// do action 2
}


// Code type 2
a = Var;
a &= 0xF000;
if(a == 0x8000)
{
// do action 1
}
else
{
// do action 2
}

Both emulation trace and ROM operating, code type 2 operate well but code type 1 not. Code type 1 do not operate action 1 any time and any way but code type 2 operate well.

If you have any idea about this state, help me.

Thanks

 

[muoinhohn]

which is the type of a and Var ?

 

[nadamo]

Var type is unsigned long.

31 has many variable type, int, float, long.
But all variables consists of 4 bytes.

 

[muoinhohn]

HI
I don't have Compiler for TMS320C31. So I've tried to use your code on the simulator of TMS320C6713 of CCS3.1 . Both are ok.

You can post your message on
https://www.dsprelated.com/groups/c3x/1.php
to require helps.

Regards