IDA IDC-script: cannot shift right properly
 

I have a little problem with idc-script
Here's an example:

Message("\n%X",0xC0665A84>>31);
Message("\n%X",0xC0665A84/0x80000000);

First resuls 0xFFFFFFFF, and second - 0;

What's a damn? The result must be 1 in both cases.

I have to implement ROR and ROL instructions in my IDC-script, but I can't 'cause the reason above.

Could someone tell me another way?

Thank you.

IDC uses signed arithmetic. Shift Right corresponds to SAR. Nevertheless you can still implement ROL and ROR keeping this in mind. :)

2 ninio:
Thanks a lot.

If someone need:
#define ROL(x,n) x<<n|(~(0xFFFFFFFF<<n)&x>>32-n)
#define ROR(x,n) x<<32-n|(~(0x80000000>>n-1)&x>>n)