Crate oxifft_codegen 

OxiFFT Codelet Generator

This proc-macro crate generates optimized FFT codelets at compile time. It replaces FFTW’s OCaml-based genfft with Rust procedural macros.

Overview

Codelets are highly optimized kernels for small FFT sizes (2-64). They are generated at compile time with:

• Common subexpression elimination
• Strength reduction
• Optimal instruction ordering
• SIMD-aware code patterns

Usage

use oxifft_codegen::gen_dft_codelet;

// Generate size-8 DFT codelet
gen_dft_codelet!(8);

Macros

gen_dft_codelet

Convenience macro to generate all codelets for a size.

gen_notw_codelet

Generate a non-twiddle (base case) DFT codelet.

gen_simd_codelet

Generate a SIMD-optimized codelet.

gen_twiddle_codelet

Generate a twiddle-factor DFT codelet.