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Jeremy G. Siek 9 年之前
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共有 1 個文件被更改,包括 0 次插入2 次删除
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      book.tex

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book.tex

@@ -3179,8 +3179,6 @@ One further caveat is that the second argument of the \key{cmpq} instruction
 cannot be an immediate value. If you are comparing two immediates, you must insert another \key{movq} instruction to put the second argument in
 cannot be an immediate value. If you are comparing two immediates, you must insert another \key{movq} instruction to put the second argument in
 \key{rax}.
 \key{rax}.
 
 
-There is no unary x86 instruction that we can translate \code{(not x)} into.
-However, we can achieve the same results using the bitwise \key{xor} instruction.
 
 
 % The translation of the \code{not} operator is not quite as simple
 % The translation of the \code{not} operator is not quite as simple
 % as it seems. Recall that \key{notq} is a bitwise operator, not a boolean 
 % as it seems. Recall that \key{notq} is a bitwise operator, not a boolean