What is the meaning of this expression-CodePudding

Why a, b is equal and t<0 is not equal to a

CodePudding user response:

Code? To discuss the problem always has a premise or code ~ the problem itself

CodePudding user response:

code? To discuss the problem always has a premise or the problem of code ~

Expression is t=a - b; Then the OF is a condition code, if t=a - b signed overflow happens, OF equal to 1, the signed overflow does not occur, OF=0; And then it gives such a logic operations to determine whether any overflow, but the judgment logic operation I really don't understand the meaning of it

CodePudding user response:

Because meet this a<0==b<0 a and b are symbols of the same as
If after meet t<0!=a<0 t and as a symbol is not the same
T=a + b, a and b symbols are the same, but the result of the combined t symbol is not the same, what that means? That t overflow the

CodePudding user response:

reference qybao reply: 3/f

because meet this a<0==b<0 a and b are symbols of the same as
If after meet t<0!=a<0 t and as a symbol is not the same
T=a + b, a and b symbols are the same, but the result of the combined t symbol is not the same, what that means? That t overflow

See, I see, thank you,