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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"><HTML><HEAD><TITLE>80386 Programmer's Reference Manual -- Opcode SETcc</TITLE></HEAD><BODY><B>up:</B> <A HREF="c17.htm">Chapter 17 -- 80386 Instruction Set</A><BR><B>prev:</B><A HREF="SCAS.htm"> SCAS/SCASB/SCASW/SCASD Compare String Data</A><BR><B>next:</B><A HREF="SGDT.htm"> SGDT/SIDT Store Global/Interrupt Descriptor Table Register</A><P><HR><P><H1>SETcc -- Byte Set on Condition</H1><PRE>Opcode Instruction Clocks Description0F 97 SETA r/m8 4/5 Set byte if above (CF=0 and ZF=0)0F 93 SETAE r/m8 4/5 Set byte if above or equal (CF=0)0F 92 SETB r/m8 4/5 Set byte if below (CF=1)0F 96 SETBE r/m8 4/5 Set byte if below or equal (CF=1 or (ZF=1)0F 92 SETC r/m8 4/5 Set if carry (CF=1)0F 94 SETE r/m8 4/5 Set byte if equal (ZF=1)0F 9F SETG r/m8 4/5 Set byte if greater (ZF=0 or SF=OF)0F 9D SETGE r/m8 4/5 Set byte if greater or equal (SF=OF)0F 9C SETL r/m8 4/5 Set byte if less (SF<>OF)0F 9E SETLE r/m8 4/5 Set byte if less or equal (ZF=1 and SF<>OF)0F 96 SETNA r/m8 4/5 Set byte if not above (CF=1)0F 92 SETNAE r/m8 4/5 Set byte if not above or equal (CF=1)0F 93 SETNB r/m8 4/5 Set byte if not below (CF=0)0F 97 SETNBE r/m8 4/5 Set byte if not below or equal (CF=0 and ZF=0)0F 93 SETNC r/m8 4/5 Set byte if not carry (CF=0)0F 95 SETNE r/m8 4/5 Set byte if not equal (ZF=0)0F 9E SETNG r/m8 4/5 Set byte if not greater (ZF=1 or SF<>OF)0F 9C SETNGE r/m8 4/5 Set if not greater or equal (SF<>OF)0F 9D SETNL r/m8 4/5 Set byte if not less (SF=OF)0F 9F SETNLE r/m8 4/5 Set byte if not less or equal (ZF=1 and SF<>OF)0F 91 SETNO r/m8 4/5 Set byte if not overflow (OF=0)0F 9B SETNP r/m8 4/5 Set byte if not parity (PF=0)0F 99 SETNS r/m8 4/5 Set byte if not sign (SF=0)0F 95 SETNZ r/m8 4/5 Set byte if not zero (ZF=0)0F 90 SETO r/m8 4/5 Set byte if overflow (OF=1)0F 9A SETP r/m8 4/5 Set byte if parity (PF=1)0F 9A SETPE r/m8 4/5 Set byte if parity even (PF=1)0F 9B SETPO r/m8 4/5 Set byte if parity odd (PF=0)0F 98 SETS r/m8 4/5 Set byte if sign (SF=1)0F 94 SETZ r/m8 4/5 Set byte if zero (ZF=1)</PRE><H2>Operation</H2><PRE>IF condition THEN r/m8 := 1 ELSE r/m8 := 0; FI;</PRE><H2>Description</H2>SETcc stores a byte at the destination specified by the effective addressor register if the condition is met, or a 0 byte if the condition is notmet.<H2>Flags Affected</H2>None<H2>Protected Mode Exceptions</H2>#GP(0) if the result is in a non-writable 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 pagefault<P><HR><P><B>up:</B> <A HREF="c17.htm">Chapter 17 -- 80386 Instruction Set</A><BR><B>prev:</B><A HREF="SCAS.htm"> SCAS/SCASB/SCASW/SCASD Compare String Data</A><BR><B>next:</B><A HREF="SGDT.htm"> SGDT/SIDT Store Global/Interrupt Descriptor Table Register</A></BODY>⌨️ 快捷键说明
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