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example, for 4 (%esp,%eax,4) This operand, it represents the memory address is 4+%esp+4*%eax the value of the memory area.The operands are the majority of the instructions, so the above-mentioned methods, in the following articles we will often see, they will be a good friend of the ape friends.Article SummaryThis chapter only introduces some of the basics of the compilation, which is relatively not particularly difficult, but is the key to opening the door behind the mystery. So if any of the

logical operation is any nonzero, false is 0Expression result!0x41 0x00!0x00 0x01!! 0x41 0x010x69 0x55 0x010x69 | | 0x55 0x01C language Shift operationsThe general machine supports two right-shift operations:Logical Right Shift: Move right, discard right, left end 0Arithmetic Right Shift:move right, discard right side, left end to fill the value of the most significant bitlike[01100011]>>4 result is [00000110] [10010101]>>4 The result is[11111001]//Red 1 is the most significant bitNoteFor u

, operand 2 is destination addressThe type of operand immediately//is a constant value register//data (get/Save) to register memory//IS memory,data (get/Save) to registerOperand formatData Transfer InstructionsThe MOV instruction source operand can be an immediate number, register, memory destination operand can be register, memory addressLimitTwo operands cannot all point to the memory locationStackThe address of the stack is to increase the attention!!!! Here, the bottom picture is on top.Exec

Code.Complete.Second.Edition 2004Bachman compared the ptolemaic-to-copernican change in astronomy to the "change" computer programming in the early 1970s.When Bachman made the comparison in 1973, data processing is changing from a computer-centered view of information system S to a database-centered view. Bachman pointed out this ancients of data processing wante