Intel base instruction -- Jcc

检查EFLAGS寄存器中一个或多个状态标志（CF、of、PF、SF和ZF）的状态，如果这些标志处于指定状态（条件），则执行跳转到目标操作数指定的目标指令。条件代码（cc）与每个指令相关联，以指示正在测试的条件。如果条件不满足，则不执行跳转，并继续执行Jcc指令之后的指令。

/*
* Jcc -- Jump if Condition Is Met
*/
Opcode       Instruction   Op/En   64-Bit Mode       Compat/Leg Mode       Description
77 cb       JA rel8       D       Valid           Valid               Jump short if above (CF=0 and ZF=0).
73 cb       JAE rel8   D       Valid           Valid               Jump short if above or equal (CF=0).
72 cb       JB rel8       D       Valid           Valid               Jump short if below (CF=1).
76 cb       JBE rel8   D       Valid           Valid               Jump short if below or equal (CF=1 or ZF=1).
72 cb       JC rel8       D       Valid           Valid               Jump short if carry (CF=1).
E3 cb       JCXZ rel8   D       N.E.           Valid               Jump short if CX register is 0.
E3 cb       JECXZ rel8   D       Valid           Valid               Jump short if ECX register is 0.
E3 cb       JRCXZ rel8   D       Valid           N.E.               Jump short if RCX register is 0.
74 cb       JE rel8       D       Valid           Valid               Jump short if equal (ZF=1).
7F cb       JG rel8       D       Valid           Valid               Jump short if greater (ZF=0 and SF=OF).
7D cb       JGE rel8   D       Valid           Valid               Jump short if greater or equal (SF=OF).
7C cb       JL rel8       D       Valid           Valid               Jump short if less (SF≠ OF).
7E cb       JLE rel8   D       Valid           Valid               Jump short if less or equal (ZF=1 or SF≠ OF).
76 cb       JNA rel8   D       Valid           Valid               Jump short if not above (CF=1 or ZF=1).
72 cb       JNAE rel8   D       Valid           Valid               Jump short if not above or equal (CF=1).
73 cb       JNB rel8   D       Valid           Valid               Jump short if not below (CF=0).
77 cb       JNBE rel8   D       Valid           Valid               Jump short if not below or equal (CF=0 and ZF=0).
73 cb       JNC rel8   D       Valid           Valid               Jump short if not carry (CF=0).
75 cb       JNE rel8   D       Valid           Valid               Jump short if not equal (ZF=0).
7E cb       JNG rel8   D       Valid           Valid               Jump short if not greater (ZF=1 or SF≠ OF).
7C cb       JNGE rel8   D       Valid           Valid               Jump short if not greater or equal (SF≠ OF).
7D cb       JNL rel8   D       Valid           Valid               Jump short if not less (SF=OF).
7F cb       JNLE rel8   D       Valid           Valid               Jump short if not less or equal (ZF=0 and SF=OF).
71 cb       JNO rel8   D       Valid           Valid               Jump short if not overflow (OF=0).
7B cb       JNP rel8   D       Valid           Valid               Jump short if not parity (PF=0).
79 cb       JNS rel8   D       Valid           Valid               Jump short if not sign (SF=0).
75 cb       JNZ rel8   D       Valid           Valid               Jump short if not zero (ZF=0).
70 cb       JO rel8       D       Valid           Valid               Jump short if overflow (OF=1).
7A cb       JP rel8       D       Valid           Valid               Jump short if parity (PF=1).
7A cb       JPE rel8   D       Valid           Valid               Jump short if parity even (PF=1).
7B cb       JPO rel8   D       Valid           Valid               Jump short if parity odd (PF=0).
78 cb       JS rel8       D       Valid           Valid               Jump short if sign (SF=1).
74 cb       JZ rel8       D       Valid           Valid               Jump short if zero (ZF = 1).
0F 87 cw   JA rel16   D       N.S.           Valid               Jump near if above (CF=0 and ZF=0). Not supported in 64-bit mode.
0F 87 cd   JA rel32   D       Valid           Valid               Jump near if above (CF=0 and ZF=0).
0F 83 cw   JAE rel16   D       N.S.           Valid               Jump near if above or equal (CF=0). Not supported in 64-bit mode.

0F 83 cd   JAE rel32   D       Valid           Valid               Jump near if above or equal (CF=0).
0F 82 cw   JB rel16   D       N.S.           Valid               Jump near if below (CF=1). Not supported in 64-bit mode.
0F 82 cd   JB rel32   D       Valid           Valid               Jump near if below (CF=1).
0F 86 cw   JBE rel16   D       N.S.           Valid               Jump near if below or equal (CF=1 or ZF=1). Not supported in 64-bit mode.
0F 86 cd   JBE rel32   D       Valid           Valid               Jump near if below or equal (CF=1 or ZF=1).
0F 82 cw   JC rel16   D       N.S.           Valid               Jump near if carry (CF=1). Not supported in 64-bit mode.
0F 82 cd   JC rel32   D       Valid           Valid               Jump near if carry (CF=1).
0F 84 cw   JE rel16   D       N.S.           Valid               Jump near if equal (ZF=1). Not supported in 64-bit mode.
0F 84 cd   JE rel32   D       Valid           Valid               Jump near if equal (ZF=1).
0F 84 cw   JZ rel16   D       N.S.           Valid               Jump near if 0 (ZF=1). Not supported in 64-bit mode.
0F 84 cd   JZ rel32   D       Valid           Valid               Jump near if 0 (ZF=1).
0F 8F cw   JG rel16   D       N.S.           Valid               Jump near if greater (ZF=0 and SF=OF). Not supported in 64-bit mode.
0F 8F cd   JG rel32   D       Valid           Valid               Jump near if greater (ZF=0 and SF=OF).
0F 8D cw   JGE rel16   D       N.S.           Valid               Jump near if greater or equal (SF=OF). Notsupported in 64-bit mode.
0F 8D cd   JGE rel32   D       Valid           Valid               Jump near if greater or equal (SF=OF).
0F 8C cw   JL rel16   D       N.S.           Valid               Jump near if less (SF≠ OF). Not supported in 64-bit mode.
0F 8C cd   JL rel32   D       Valid           Valid               Jump near if less (SF≠ OF).
0F 8E cw   JLE rel16   D       N.S.           Valid               Jump near if less or equal (ZF=1 or SF≠ OF). Not supported in 64-bit mode.
0F 8E cd   JLE rel32   D       Valid           Valid               Jump near if less or equal (ZF=1 or SF≠ OF).
0F 86 cw   JNA rel16   D       N.S.           Valid               Jump near if not above (CF=1 or ZF=1). Not supported in 64-bit mode.
0F 86 cd   JNA rel32   D       Valid           Valid               Jump near if not above (CF=1 or ZF=1).
0F 82 cw   JNAE rel16   D       N.S.           Valid               Jump near if not above or equal (CF=1). Not supported in 64-bit mode.
0F 82 cd   JNAE rel32   D       Valid           Valid               Jump near if not above or equal (CF=1).
0F 83 cw   JNB rel16   D       N.S.           Valid               Jump near if not below (CF=0). Not supported in 64-bit mode.
0F 83 cd   JNB rel32   D       Valid           Valid               Jump near if not below (CF=0).
0F 87 cw   JNBE rel16   D       N.S.           Valid               Jump near if not below or equal (CF=0 and ZF=0). Not supported in 64-bit mode.
0F 87 cd   JNBE rel32   D       Valid           Valid               Jump near if not below or equal (CF=0 and ZF=0).
0F 83 cw   JNC rel16   D       N.S.           Valid               Jump near if not carry (CF=0). Not supported in 64-bit mode.
0F 83 cd   JNC rel32   D       Valid           Valid               Jump near if not carry (CF=0).

0F 85 cw   JNE rel16   D       N.S.           Valid               Jump near if not equal (ZF=0). Not supported in 64-bit mode.
0F 85 cd   JNE rel32   D       Valid           Valid               Jump near if not equal (ZF=0).
0F 8E cw   JNG rel16   D       N.S.           Valid               Jump near if not greater (ZF=1 or SF≠ OF). Not supported in 64-bit mode.
0F 8E cd   JNG rel32   D       Valid           Valid               Jump near if not greater (ZF=1 or SF≠ OF).
0F 8C cw   JNGE rel16   D       N.S.           Valid               Jump near if not greater or equal (SF≠ OF). Not supported in 64-bit mode.
0F 8C cd   JNGE rel32   D       Valid           Valid               Jump near if not greater or equal (SF≠ OF).
0F 8D cw   JNL rel16   D       N.S.           Valid               Jump near if not less (SF=OF). Not supported in 64-bit mode.
0F 8D cd   JNL rel32   D       Valid           Valid               Jump near if not less (SF=OF).
0F 8F cw   JNLE rel16   D       N.S.           Valid               Jump near if not less or equal (ZF=0 and SF=OF). Not supported in 64-bit mode.
0F 8F cd   JNLE rel32   D       Valid           Valid               Jump near if not less or equal (ZF=0 and SF=OF).
0F 81 cw   JNO rel16   D       N.S.           Valid               Jump near if not overflow (OF=0). Not supported in 64-bit mode.
0F 81 cd   JNO rel32   D       Valid           Valid               Jump near if not overflow (OF=0).
0F 8B cw   JNP rel16   D       N.S.           Valid               Jump near if not parity (PF=0). Not supported in 64-bit mode.
0F 8B cd   JNP rel32   D       Valid           Valid               Jump near if not parity (PF=0).
0F 89 cw   JNS rel16   D       N.S.           Valid               Jump near if not sign (SF=0). Not supported in 64-bit mode.
0F 89 cd   JNS rel32   D       Valid           Valid               Jump near if not sign (SF=0).
0F 85 cw   JNZ rel16   D       N.S.           Valid               Jump near if not zero (ZF=0). Not supported in 64-bit mode.
0F 85 cd   JNZ rel32   D       Valid           Valid               Jump near if not zero (ZF=0).
0F 80 cw   JO rel16   D       N.S.           Valid               Jump near if overflow (OF=1). Not supported in 64-bit mode.
0F 80 cd   JO rel32   D       Valid           Valid               Jump near if overflow (OF=1).
0F 8A cw   JP rel16   D       N.S.           Valid               Jump near if parity (PF=1). Not supported in 64-bit mode.
0F 8A cd   JP rel32   D       Valid           Valid               Jump near if parity (PF=1).
0F 8A cw   JPE rel16   D       N.S.           Valid               Jump near if parity even (PF=1). Not supported in 64-bit mode.
0F 8A cd   JPE rel32   D       Valid           Valid               Jump near if parity even (PF=1).
0F 8B cw   JPO rel16   D       N.S.           Valid               Jump near if parity odd (PF=0). Not supported in 64-bit mode.
0F 8B cd   JPO rel32   D       Valid           Valid               Jump near if parity odd (PF=0).
0F 88 cw   JS rel16   D       N.S.           Valid               Jump near if sign (SF=1). Not supported in 64-bit mode.

0F 88 cd   JS rel32   D       Valid           Valid               Jump near if sign (SF=1).
0F 84 cw   JZ rel16   D       N.S.           Valid               Jump near if 0 (ZF=1). Not supported in 64-bit mode.
0F 84 cd   JZ rel32   D       Valid           Valid               Jump near if 0 (ZF=1).

N.S. 未另行说明。
N.E. 不适用。