Compiler/TMS320F28235: Math operation error using TMS320F28235 with TI v18.1.6.LTS and CCS v7.3.0.00019

Tool/software: TI C/C++ Compiler

Hi,

i have found a problem on math operations using:

 TMS320F28235

TI v18.1.6.LTS compiler (optimization 4/5)

CCS v7.3.0.00019 

Let me provide an example code:

long Test1;

int Test2;

......// variable initialization

Test2=15;

Test1 = (Test2*10)/3;   // Test1=5 !!!!!!! ERROR!!!

I have test alternative code as:

Test1 = (Test2*100)/30;   // Test1=5 !!!!!!! ERROR!!!

Test1 = (Test2*101)/30;   // Test1=50 !!!!!!! CORRECT 

Test1 = (Test2*10L)/3;   // Test1=50 !!!!!!! CORRECT  forcing the secon operation to LONG it seems to work correctly.

Test1 = ((Long)Test2*10)/3;   // Test1=50 !!!!!!! CORRECT  forcing the first operation to LONG it seems to work correctly.

if I split the opration in two step:

Test1 = (Test2*10);

Test1 = Test1/3;  // Test1=50 !!!!!!! CORRECT

 so I'm not so sure to have understood the math operation issue.

other test .. defining 

long Test1;

unsigned int Test2;

....  ......// variable initialization

Test2=15;

Test1 = (Test2*10)/3;   // Test1=50 !!!!!!! CORRECT!!!

so what's change beetween the two cases? Test2 defined int or unsigned int..

Please give me support!!

Best Regards

Massimo