HelenOS sources

RS_MASK            87 kernel/arch/mips32/src/debug/stacktrace.c #define BASE_MASK	RS_MASK
RS_MASK            91 kernel/arch/mips32/src/debug/stacktrace.c #define RS_GET(inst)		(((inst) & RS_MASK) >> RS_SHIFT)
RS_MASK           113 kernel/arch/mips32/src/debug/stacktrace.c 	(((inst) & ~RS_MASK) == ADDU_SP_R_R0_TEMPL)