SIMD Intrinsics

Purpose

Guide agents through SIMD: reading auto-vectorization output, writing SSE2/AVX2/NEON intrinsics, runtime CPU feature detection, and choosing between compiler auto-vectorization and manual intrinsics.

Triggers

• "How do I check if my loop is being auto-vectorized?"
• "How do I write SSE2/AVX2 intrinsics?"
• "Auto-vectorization failed — how do I fix it?"
• "How do I check for CPU features at runtime?"
• "Should I use intrinsics or let the compiler vectorize?"
• "How do I write NEON intrinsics for ARM?"

Workflow

1. Check auto-vectorization