CUSL

CUSL is an experimental CUDA port of selected routines from the GNU Scientific Library (GSL). It is intended for CUDA device code that needs a small subset of GSL-style special functions and random distributions without calling back to the CPU.

The project is not a complete GSL replacement. The current code is a compact, header-oriented collection of ports in src/, with validation programs in tests/ that compare CUSL output against GSL or CUDA standard functions.

Current Status

• Header-only CUDA/C++ implementation files live in src/*.cuh.
• Existing validation is executable comparison code, not a formal test suite.
• GSL-style status objects and error propagation are not implemented. Most routines return a double; domain and overflow cases may return CUSL_NAN and some device routines print diagnostic messages.
• Distribution-level statistical validation is still incomplete for some random routines.

Repository Layout

src/     CUDA headers implementing selected GSL routines and helpers
tests/   GSL, CUDA, shell, Python, and reference-data comparison programs

Documentation Map

• Getting Started: dependencies, build commands, and a minimal CUDA usage example.
• Routines: current GSL-to-CUSL coverage table.
• Validation: available comparison scripts and what they check.
• Porting Notes: conventions and known limitations for future ports.