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X86-assembly/Instructions/cmp - aldeid
https://www.aldeid.com/wiki/X86-assembly/Instructions/cmp
X86-assembly Instructions cmp Contents 1 Description 2 Syntax 3 Example 4 Comments Description The cmp instruction is used to perform comparison. It's identical to the sub instruction except it does not affect operands. It impacts the Zero Flag (ZF) as well as the Carry Flag (CF) as follows: Syntax cmp destination, source Example
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CMP — Compare Two Operands
https://www.felixcloutier.com/x86/cmp
23 rows · The condition codes used by the Jcc, CMOVcc, and SETcc instructions are based on …
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assembly - x86 CMP Instruction Difference - Stack Overflow
https://stackoverflow.com/questions/2760794/x86-cmp-instruction-difference
Nov 14, 2013 · As for why this exists: The x86 instruction format uses the ModR/M byte to denote either a memory address or a register. Each instruction can only have one ModR/M value, which means it can only access one memory address (not including special instructions like MOVSB). So this means that there can't be a general cmp r/m32, r/m32 instruction, and ...
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x86 CMP Instruction Difference - NewbeDEV
https://newbedev.com/x86-cmp-instruction-difference
x86 CMP Instruction Difference. It doesn't matter which opcode you use if you compare two registers. The only difference is when comparing a register with a memory operand, as the opcode used determines which will be subtracted from which. As for why this exists: The x86 instruction format uses the ModR/M byte to denote either a memory address ...
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Guide to x86 Assembly - Computer Science
https://www.cs.virginia.edu/~evans/cs216/guides/x86.html
x86 Assembly Guide. This guide describes the basics of 32-bit x86 assembly language programming, covering a small but useful subset of the available instructions and assembler directives. There are several different assembly languages for generating x86 machine code. The one we will use in CS216 is the Microsoft Macro Assembler (MASM) assembler.
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汇编语言CMP（比较）指令：比较整数
http://c.biancheng.net/view/3561.html
x86 汇编语言用 CMP 指令比较整数。字符代码也是整数，因此可以用 CMP 指令。 CMP（比较）指令执行从目的操作数中减去源操作数的隐含减法操作，并且不修改任何操作数： CMP destination,source. 标志位
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CMOVcc — Conditional Move - felixcloutier.com
https://www.felixcloutier.com/x86/cmovcc
91 rows · Description ¶ . The CMOVcc instructions check the state of one or more of the status flags in the EFLAGS register (CF, OF, PF, SF, and ZF) and perform a move operation if the flags are in a specified state (or condition). A condition code (cc) is associated with each instruction to indicate the condition being tested for.If the condition is not satisfied, a move is not performed … cmp
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CMPPS — Compare Packed Single-Precision Floating-Point …
https://www.felixcloutier.com/x86/cmpps
C. V/V. AVX512VL AVX512F. Compare packed single-precision floating-point values in xmm3/m128/m32bcst and xmm2 using bits 4:0 of imm8 as a comparison predicate with writemask k2 and leave the result in mask register k1. EVEX.256.0F.W0 C2 /r ib VCMPPS k1 {k2}, ymm2, ymm3/m256/m32bcst, imm8. C.
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80386 Programmer's Reference Manual -- Opcode CMP
https://www.fermimn.edu.it/linux/quarta/x86/cmp.htm
Description. CMP subtracts the second operand from the first but, unlike the SUB instruction, does not store the result; only the flags are changed. CMP is typically used in conjunction with conditional jumps and the SETcc instruction. (Refer to Appendix D for the list of signed and unsigned flag tests provided.)
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Liberation: x86 Instruction Set Reference
https://c9x.me/x86/html/file_module_x86_id_35.html
x86 assembly tutorials, x86 opcode reference, programming, pastebin with syntax highlighting. x86 Instruction Set Reference CMP Compare Two Operands. Opcode Mnemonic Description; 3C ib: CMP AL, imm8: Compare imm8 with AL. 3D iw: CMP AX, imm16: Compare imm16 with AX. 3D id: CMP EAX, imm32: Compare imm32 with EAX. 80 /7 ib: CMP r/m8, imm8 ...
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