Worked on the mozilla/gecko-dev repository to address a critical bug affecting floating-point parameter passing on the LoongArch system ABI. Focused on compiler development and low-level programming in C++, the work involved implementing an ABI fix to ensure floating-point parameters beyond the initial registers are correctly passed in general-purpose registers, as required by the system specification. This change improved cross-architecture reliability and reduced the risk of JIT exit crashes. The update also included removing redundant code to streamline the parameter passing path, enhancing maintainability and stability for LoongArch support within Gecko’s system architecture and JIT infrastructure.