Sprint 202: Advanced 3D Math SIMD Expansion ⚡

⚡ The new SimdOp Enum

To cleanly scale the compiler's vectorization capabilities, we introduced the SimdOp enum inside src/vm/opcode.rs. Instead of creating separate bytecode instructions for each vector operation, the compiler now emits a unified OpCode::SimdExec carrying the target operations:

pub enum SimdOp {
    Scale,
    Add,
    Subtract,
    Dot,
}

⚙️ Machine Handler Execution

The Stack-VM handles these operations using raw glam::Vec4 hardware registers:

• SimdOp::Scale: Multiplies a vector by a scalar factor (Vec4 * factor).
• SimdOp::Add / Subtract: Performs element-wise vector addition or subtraction (Vec4 + Vec4 / Vec4 - Vec4) in a single CPU cycle.
• SimdOp::Dot: Computes the mathematical dot product (Vec4::dot()), collapsing the vector into a single RelType::Float scalar. This is highly useful for fast raycasting and shader preprocessing.

🧪 Verification & Testing

We added dedicated unit tests to verify the correctness of our expansion: test_simd_vector_addition_applied and test_simd_dot_product_applied. Both tests verify that the optimizer successfully collapses sequential instructions into the new parallel operations and executes them correctly inside the VM.