How do you understand 'REX.W + B8+ rd io' form for x86-64 assembly?...

RISC-V U-Format instruction immediate confusion...

Why is multiplication by 4 needed to offset when you calculate branch target address?...

How do hardware recognizes RISC-V compressed instructions?...

What is REX prefix in Instruction Encoding?...

ARMv7 T3 encoding for adds...

ARM instruction to hex for loads like pc-relative LDR...

How does an instruction decoder tell the difference between a prefix and a primary opcode?...

Is instruction encoded differently from .so file to runtime memory?...

how arm-thumb instruction set's blx instruction support 4MB range...

How does the RMI Instruction Operand Encoding of ROUNDSS work?...

Why doesn't my assembler use the 05 opcode (add eax,imm32) short form the manual documents for A...

Does offset in ARM Assembly counts from the start or the end?...

Encoding JMP FAR and CALL FAR in x86-64...

ModRM: Can't use direct address, assembly x86...

Target destination of a JE branch instruction, given its machine code and starting address...

Encoding memory operands using the RSP register in x64 - SIB byte needed?...

x86 sub instruction opcode confusion...

Why does jmpq of x86-64 only need 32-bit length address?...

Where has Intel documented the encoding of extended registers (R8-R15) in ModR/M byte?...

Why does JALR encode the LSB of the offset?...

MIPS Instruction Decoding...

Why is default operand size 32 bits in 64 mode?...

x86 find out operand size of instruction given only the hex machine code?...

How does x86 handle byte vs word addressing when executing instructions and reading/writing data?...

x86 assembly 16 bit vs 8 bit immediate operand encoding...

Encoding 8-bit operand size? Is there a prefix for that like for 16-bit?...

Understanding Instruction Encoding?...

Encoding x86-16 instruction with immediate operand...

Give the opcode and number of bytes of code for each of these instructions...