lxp32-cpu

LXP32 is a small and FPGA friendly 32-bit CPU IP core based on a simple, original instruction set. Its key features include:

• portability (described in behavioral VHDL, not tied to any particular vendor);
• 3-stage hazard-free pipeline;
• 256 registers implemented as a RAM block;
• only 30 distinct opcodes;
• separate instruction and data buses, optional instruction cache;
• WISHBONE compatibility;
• 8 interrupts with hardwired priorities;
• optional divider.

The LXP32 processor was successfully used in commercial projects, is well documented and comes with a verification environment.

LXP32 lacks some features of more advanced processors, such as nested interrupt handling, debugging support, floating-point and memory management units. LXP32 ISA (Instruction Set Architecture) does not currently have a C compiler, only assembly based workflow is supported.

Project website: https://lxp32.github.io/