Assembly Language Step-by-Step: Programming with Linux®, Third Edition

Appendix A. Partial x86 Instruction Set Reference

Instruction	Reference Page	Text Page	CPU
AAA	512	411
ADC	513	Only in Appendix A
ADD	515	207
AND	517	281
BT	519	306	386+
CALL	521	336, 483
CLC	523	Only in Appendix A
CLD	524	411
CMP	525	411
DEC	527	215
DIV	528	411
INC	529	215
INT	530	411
IRET	531	260
J?	532	218, 299, 302
JCXZ	534	421
JECXZ	535	Only in Appendix A	386+
JMP	536	298
LEA	537	315
LOOP	538	408
LOOPNZ/LOOPNE	540	422
LOOPZ/LOOPE	541	Only in Appendix A
MOV	542	204
MOVS	544	414
MOVSX	546	224	386+
MUL	547	225
NEG	549	223
NOP	550	Only in Appendix A
NOT	551	285
OR	552	283
POP	554	251
POPA	555	251, 344	286+
POPAD	555	251, 344	386+
POPF	556	251
POPFD	557	251	386+
PUSH	558	249
PUSHA	559	249	286+
PUSHAD	560	249, 344	386+
PUSHF	561	249
PUSHFD	562	249	386+
RET	563	337
ROL	564	288
ROR	566	288
SBB	568	Only in Appendix A
SHL	570	286
SHR	572	286
STC	574	289
STD	575	405
STOS	576	402
SUB	577	302
XCHG	579	234
XLAT	580	321
XOR	581	284

Notes on the Instruction Set Reference

Instruction Operands

When an instruction takes two operands, the destination operand is the one on the left, and the source operand is the one on the right. In general, when a result is produced by an instruction, the result replaces the destination operand. For example, in the instruction

ADD BX,SI

the BX register is added to the SI register, and the sum is then placed in the BX register, overwriting whatever was in BX before the addition.

Flag Results

Each instruction contains a flag summary that looks like the following (the asterisks present will vary from instruction to instruction):

O D I T S Z A P C OF: Overflow flag TF: Trap flag AF: Aux carry F F ...