ADC

[HellOfMice]

I found something strange:

Code: [Select]

14 01                               | ADC      AL,114
14 FF                               | ADC      AL,-114


Felix Cloutier on his site (https://www.felixcloutier.com/x86/adc) tells:

The ADC instruction does not distinguish between signed or unsigned operands. Instead, the processor evaluates the result for both data types and sets the OF and CF flags to indicate a carry in the signed or unsigned result, respectively. The SF flag indicates the sign of the signed result.

But the result is strange, why does it proceed like this?

[Vortex]

Hi Philippe,

Here, the OF and CF flags should operate for both ıf the signed and unsigned arithmetics.

[HellOfMice]

i TRIED WITH OTHER NUMBERS i DON4T UNDERTANS