LC

Write Same Program in x86-64, ARM64, and RISC-V; Compare

medium2/8

Understand x86-64 System V ABI Calling Conventions at CPU Level Understand Instruction Encoding: Manually Encode 3 x86 Instructions

Language

Compiler

2.0s Limit 256MB

Implementation

Implement and compare same function across three architectures.

Requirements:

Write add_numbers function in x86-64 assembly
Write add_numbers function in ARM64 assembly
Write add_numbers function in RISC-V assembly
Compile and test each version
Compare instruction counts
Compare code size
Compare register usage
Document key differences

Why This Matters

This is the same instruction-count and code-density comparison that motivated Apple's 2020 transition from x86-64 to ARM64 in Apple Silicon via Rosetta 2, and that RISC-V International cites when pitching royalty-free cores against Arm's licensing model. The register-count and encoding differences you measure here directly shape real compiler backend decisions in LLVM and GCC, which maintain separate code generators for each target.

Hints

0 / 3 revealed

Validation Suite

main.c

Workspace 1.0