HelenOS sources

s3                 51 boot/arch/mips32/include/arch/regname.h #define s3      19
s3                 57 kernel/arch/mips32/include/arch/asm/regname.h #define s3      19
s3                 57 uspace/lib/c/arch/mips32/include/libarch/regname.h #define s3      19
HelenOS homepage, sources at GitHub