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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"><HTML><HEAD><TITLE>80386 Programmer's Reference Manual -- Opcode AND</TITLE></HEAD><BODY><B>up:</B> <A HREF="c17.htm">Chapter 17 -- 80386 Instruction Set</A><BR><B>prev:</B><A HREF="ADD.htm"> ADD Add</A><BR><B>next:</B><A HREF="ARPL.htm"> ARPL Adjust RPL Field of Selector</A><P><HR><P><H1>AND -- Logical AND</H1><PRE>Opcode Instruction Clocks Description24 ib AND AL,imm8 2 AND immediate byte to AL25 iw AND AX,imm16 2 AND immediate word to AX25 id AND EAX,imm32 2 AND immediate dword to EAX80 /4 ib AND r/m8,imm8 2/7 AND immediate byte to r/m byte81 /4 iw AND r/m16,imm16 2/7 AND immediate word to r/m word81 /4 id AND r/m32,imm32 2/7 AND immediate dword to r/m dword83 /4 ib AND r/m16,imm8 2/7 AND sign-extended immediate byte with r/m word83 /4 ib AND r/m32,imm8 2/7 AND sign-extended immediate byte with r/m dword20 /r AND r/m8,r8 2/7 AND byte register to r/m byte21 /r AND r/m16,r16 2/7 AND word register to r/m word21 /r AND r/m32,r32 2/7 AND dword register to r/m dword22 /r AND r8,r/m8 2/6 AND r/m byte to byte register23 /r AND r16,r/m16 2/6 AND r/m word to word register23 /r AND r32,r/m32 2/6 AND r/m dword to dword register</PRE><H2>Operation</H2><PRE>DEST := DEST AND SRC;CF := 0;OF := 0;</PRE><H2>Description</H2>Each bit of the result of the AND instruction is a 1 if both correspondingbits of the operands are 1; otherwise, it becomes a 0.<H2>Flags Affected</H2>CF := 0, OF := 0; PF, SF, and ZF as described in <A HREF="appc.htm">Appendix C</A><H2>Protected Mode Exceptions</H2>#GP(0) if the result is in a nonwritable segment; #GP(0) for an illegalmemory operand effective address in the CS, DS, ES, FS, or GS segments;#SS(0) for an illegal address in the SS segment; #PF(fault-code) for a pagefault<H2>Real Address Mode Exceptions</H2>Interrupt 13 if any part of the operand would lie outside of the effectiveaddress space from 0 to 0FFFFH<H2>Virtual 8086 Mode Exceptions</H2>Same exceptions as in Real Address Mode; #PF(fault-code) for a page fault<P><HR><P><B>up:</B> <A HREF="c17.htm">Chapter 17 -- 80386 Instruction Set</A><BR><B>prev:</B><A HREF="ADD.htm"> ADD Add</A><BR><B>next:</B><A HREF="ARPL.htm"> ARPL Adjust RPL Field of Selector</A></BODY>⌨️ 快捷键说明
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