PSR_f
regs->ARM_cpsr &= PSR_f | PSR_s | PSR_x | PSR_T_BIT | MODE32_BIT;
unsigned long cpsr = regs->ARM_cpsr & ~(PSR_f | PSR_E_BIT);
compat_ulong_t spsr = regs->pstate & ~(PSR_f | PSR_AA32_E_BIT);