If another thread is currently usingOnly fetch the VFP state from the FPU, then the existCPU if the thread whose registers are being savedrequested is
state in the PCB of thethe current thread. If a stopped thread whose's registers are being requested isfetched by a debugger, the
already valid. In that case, leavesaved state in the VFP registers on the CPU alone.PCB is already valid.