Loongson LoongArch Architecture Support

After years of Loongson's MIPS development, in 2021 the company moved to their own custom ISA with the release of the Loongson 3 5000 series, described as "...a new RISC ISA, which is a bit like MIPS or RISC-V."

LoongArch is described as a modern RISC ISA, designed to operate independently of foreign IP and licensing constraints. It features a clean, extensible design with support for vector instructions, virtualization, and scalable multicore performance, making it suitable for desktops, servers, and embedded systems. The architecture includes:

• LA32R – a reduced 32-bit version
• LA32S – a standard 32-bit version
• LA64 – a full 64-bit version