PT_R31
DEFINE(PT_R31, offsetof(struct pt_regs, exregs[15]));
cfi_st s8, PT_R31, \docfi
cfi_ld s8, PT_R31, \docfi
OFFSET(PT_R31, pt_regs, regs[31]);
DEFINE(PT_R31, offsetof(struct pt_regs, r31));
LONG_S $31, PT_R31(sp)
LONG_L $31, PT_R31(sp)
cfi_st ra, PT_R31, \docfi
cfi_ld $31, PT_R31, \docfi
cfi_ld $31, PT_R31, \docfi
OFFSET(PT_R31, pt_regs, regs[31]);
CHECK_REG(PT_R31, gpr[31]);