HelenOS sources

r13                56 boot/arch/ppc32/include/arch/regname.h #define r13  13
r13                62 kernel/arch/ppc32/include/arch/asm/regname.h #define r13  13
r13                62 uspace/lib/c/arch/ppc32/include/libarch/regname.h #define	r13	13
HelenOS homepage, sources at GitHub