HelenOS sources

sp                 61 boot/arch/mips32/include/arch/regname.h #define sp      29
sp                 77 boot/arch/ppc32/include/arch/regname.h #define sp  1
sp                 67 kernel/arch/mips32/include/arch/asm/regname.h #define sp      29
sp                 83 kernel/arch/ppc32/include/arch/asm/regname.h #define sp  1
sp                 67 uspace/lib/c/arch/mips32/include/libarch/regname.h #define sp      29
sp                 83 uspace/lib/c/arch/ppc32/include/libarch/regname.h #define	sp	1