assembly - How do AX, AH, AL map onto EAX? - Stack Overflow
The other registers like EDI/RDI have a DI low 16-bit partial register, but no high-8 part, and the low-8 DIL is only accessible in 64-bit mode: Assembly registers in 64-bit architecture Writing AL, AH, or AX leaves other bytes unmodified in the full AX/EAX/RAX , for historical reasons.
How to write hello world in assembly under Windows?
The macro variant is the same for both, but you won't learn assembly this way. You'll learn C-style asm instead. invoke is for stdcall or fastcall while cinvoke is for cdecl or variable argument fastcall. The assembler knows which to use. You can disassemble …
What exactly is an Assembly in C# or .NET? - Stack Overflow
2009年9月1日 · That compiled code will also be stored in the assembly and reused on subsequent calls. The assembly can also contain resources like icons, bitmaps, string tables and so on. Furthermore, the assembly also contains metadata in the assembly manifest - information like version number, strong name, culture, referenced assemblies and so forth.
if statement - How to write if-else in assembly? - Stack Overflow
2016年11月15日 · To use if statement in NASM assembly first line should write: comp eax, ebx In this line NASM understands that it should compare two registers. Now u should specify how NASM assembly should compare them. Lets compare for example if greater or equal: main: comp eax, ebx jge greater_or_equal greater_or_equal: ; your code if greater or equal
What does the 'and' instruction do to the operands in assembly …
2018年12月4日 · The instruction and performs bit-wise AND operation on its operands. For example the instruction and al, bl should compute the AND operation on the register al and bl (as illustrated by @Serkratos121) and store the result in al register.
assembly - Dividing in Assembler x86 - Stack Overflow
The div and idiv instructions don't have forms that take an immediate. They only take one explicit operand (register or memory), with the dividend being implicit in AX, or DX:AX, EDX:EAX, or RDX:RAX.
How do I start learning Assembly - Stack Overflow
2009年7月20日 · Get involved with communities that thrive in assembly code. The first that comes to mind is the demoscene. For one, check out the productions released for x86 Macs on pouet.
x86 - Assembly - JG/JNLE/JL/JNGE after CMP - Stack Overflow
2012年3月8日 · I don't understand the JG/JNLE/JL/JNGE instructions, which come after CMP. for example, If I have: CMP al,dl jg label1 When al=101; dl =200.
assembly - What are the ESP and the EBP registers ... - Stack …
2014年2月12日 · Understanding the stack is very crucial in programming in assembly language as this can affect the calling conventions you will be using regardless of the type. For example, even the cdecl or __stdcall is also dependent on the ESP and EBP registers, and others too in some way depend on some registers and the stack.
What do the dollar ($) and percentage (%) signs represent in x86 …
2018年9月28日 · I am trying to understand how the assembly language works for a micro-computer architecture class, and I keep facing different syntaxes in examples: sub $48, %esp mov %eax, 32(%esp) What do these...