DECL_SC_REG        54 vm_exec.c          DECL_SC_REG(VALUE, a, "12");
DECL_SC_REG        55 vm_exec.c          DECL_SC_REG(VALUE, b, "13");
DECL_SC_REG        63 vm_exec.c          DECL_SC_REG(const VALUE *, pc, "di");
DECL_SC_REG        64 vm_exec.c          DECL_SC_REG(rb_control_frame_t *, cfp, "si");
DECL_SC_REG        68 vm_exec.c          DECL_SC_REG(const VALUE *, pc, "14");
DECL_SC_REG        70 vm_exec.c          DECL_SC_REG(rb_control_frame_t *, cfp, "13");
DECL_SC_REG        72 vm_exec.c          DECL_SC_REG(rb_control_frame_t *, cfp, "15");
DECL_SC_REG        77 vm_exec.c          DECL_SC_REG(const VALUE *, pc, "14");
DECL_SC_REG        78 vm_exec.c          DECL_SC_REG(rb_control_frame_t *, cfp, "15");