What is the difference between AND AX and X AND Y, when are they used, and what do they mean? .

kevincxn

What is the difference between AND AX and X AND Y, when are they used, and what do they mean? .

www_james

AND ax, ?? is a cpu instruction, bit logic and operation instruction. Generally used to judge whether the specified bit is 0/1
X AND Y is a logical judgment statement, used to realize that both conditions are true judgments. It will eventually be converted into multiple equivalent cpu instructions by the compiler. In order to avoid miscombination with cpu instructions AND, generally use&&Instead:
  .if (AL <= '9')&&(AL >= '0')
      sub al, '0'
  .else
  ....

xsteel

What do you mean? Does it mean two meanings of and:

0 bit and

1 logical and