跳轉指令分三類:
一、無條件跳轉: JMP;
二、根據(jù) CX、ECX 寄存器的值跳轉: JCXZ(CX 為 0 則跳轉)、JECXZ(ECX 為 0 則跳轉);
三、根據(jù) EFLAGS 寄存器的標志位跳轉, 這個太多了.

根據(jù)標志位跳轉的指令:

JE ? ;等于則跳轉 JNE ?;不等于則跳轉JZ ? ;為 0 則跳轉 JNZ ?;不為 0 則跳轉JS ? ;為負則跳轉 JNS ?;不為負則跳轉JC ? ;進位則跳轉 JNC ?;不進位則跳轉JO ? ;溢出則跳轉 JNO ?;不溢出則跳轉JA ? ;無符號大于則跳轉 JNA ?;無符號不大于則跳轉 JAE ?;無符號大于等于則跳轉 JNAE ;無符號不大于等于則跳轉JG ? ;有符號大于則跳轉 JNG ?;有符號不大于則跳轉 JGE ?;有符號大于等于則跳轉 JNGE ;有符號不大于等于則跳轉JB ? ;無符號小于則跳轉 JNB ?;無符號不小于則跳轉 JBE ?;無符號小于等于則跳轉 JNBE ;無符號不小于等于則跳轉JL ? ;有符號小于則跳轉 JNL ?;有符號不小于則跳轉 JLE ?;有符號小于等于則跳轉 JNLE ;有符號不小于等于則跳轉JP ? ;奇偶位置位則跳轉 JNP ?;奇偶位清除則跳轉 JPE ?;奇偶位相等則跳轉 JPO ?;奇偶位不等則跳轉

跳轉相關的標志位:

JMP 測試

; Test28_1.asm; .386 .model flat, stdcallinclude ? ?windows.inc include ? ?kernel32.inc include ? ?masm32.inc include ? ?debug.inc includelib kernel32.lib includelib masm32.lib includelib debug.lib.code main procPrintText '1'jmp @FPrintText '2'PrintText '3' @@: PrintText '4'ret main endp end main;測試結果應該是: ;1 ;4 ;以下都應該是這樣.

JE 測試

; Test28_2.asm; .386 .model flat, stdcallinclude ? ?windows.inc include ? ?kernel32.inc include ? ?masm32.inc include ? ?debug.inc includelib kernel32.lib includelib masm32.lib includelib debug.lib.code main procPrintText '1'mov eax, 123cmp eax, 123je @FPrintText '2'PrintText '3' @@: PrintText '4'ret main endp end main

JZ 測試

; Test28_3.asm; .386 .model flat, stdcallinclude ? ?windows.inc include ? ?kernel32.inc include ? ?masm32.inc include ? ?debug.inc includelib kernel32.lib includelib masm32.lib includelib debug.lib.code main procPrintText '1'xor eax, eaxjz @FPrintText '2'PrintText '3' @@: PrintText '4'ret main endp end main

JS 測試

; Test28_4.asm; .386 .model flat, stdcallinclude ? ?windows.inc include ? ?kernel32.inc include ? ?masm32.inc include ? ?debug.inc includelib kernel32.lib includelib masm32.lib includelib debug.lib.code main procPrintText '1'xor eax, eaxdec eaxjs @FPrintText '2'PrintText '3' @@: PrintText '4'ret main endp end main

JC 測試

; Test28_5.asm; .386 .model flat, stdcallinclude ? ?windows.inc include ? ?kernel32.inc include ? ?masm32.inc include ? ?debug.inc includelib kernel32.lib includelib masm32.lib includelib debug.lib.code main procPrintText '1'mov al, 0FFhadd al, 1jc @FPrintText '2'PrintText '3' @@: PrintText '4'ret main endp end main

JO 測試

; Test28_6.asm; .386 .model flat, stdcallinclude ? ?windows.inc include ? ?kernel32.inc include ? ?masm32.inc include ? ?debug.inc includelib kernel32.lib includelib masm32.lib includelib debug.lib.code main procPrintText '1'mov al, -128sub al, 1jo @FPrintText '2'PrintText '3' @@: PrintText '4'ret main endp end main

JA 測試

; Test28_7.asm; .386 .model flat, stdcallinclude ? ?windows.inc include ? ?kernel32.inc include ? ?masm32.inc include ? ?debug.inc includelib kernel32.lib includelib masm32.lib includelib debug.lib.code main procPrintText '1'mov eax, 22cmp eax, 11ja @FPrintText '2'PrintText '3' @@: PrintText '4'ret main endp end main

JG 測試

; Test28_8.asm; .386 .model flat, stdcallinclude ? ?windows.inc include ? ?kernel32.inc include ? ?masm32.inc include ? ?debug.inc includelib kernel32.lib includelib masm32.lib includelib debug.lib.code main procPrintText '1'mov eax, 1cmp eax, -1jg @FPrintText '2'PrintText '3' @@: PrintText '4'ret main endp end main

JP 測試

; Test28_9.asm; .386 .model flat, stdcallinclude ? ?windows.inc include ? ?kernel32.inc include ? ?masm32.inc include ? ?debug.inc includelib kernel32.lib includelib masm32.lib includelib debug.lib.code main procPrintText '1'mov al, 00001110binc aljp @FPrintText '2'PrintText '3' @@: PrintText '4'ret main endp end main

JECXZ 測試

; Test28_10.asm; .386 .model flat, stdcallinclude ? ?windows.inc include ? ?kernel32.inc include ? ?masm32.inc include ? ?debug.inc includelib kernel32.lib includelib masm32.lib includelib debug.lib.code main procPrintText '1'xor ecx, ecxjecxz @FPrintText '2'PrintText '3' @@: PrintText '4'ret main endp end main

?

總結

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