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ADDC in C51

Jorge Cases


What is the most efficient way of assembly instruction ADDC in C51?

Is the following allowed

int add_high,carry,low_poti;

TL0=0x69+low_poti;
TH0=0xF8+add_high+CY;

Or should I do the following?
int add_high,carry,low_poti;

TL0=0x69+low_poti;
if (CY==1)
carry=1;
else
carry=0;
TH0=0xF8+add_high+carry;

0