PCB_KERNFPU
set_pcb_flags(pcb, PCB_KERNFPU | PCB_FPUNOSAVE |
set_pcb_flags(pcb, PCB_KERNFPU);
clear_pcb_flags(pcb, PCB_KERNFPU);
clear_pcb_flags(pcb, PCB_FPUINITDONE | PCB_KERNFPU);
set_pcb_flags(curpcb, PCB_KERNFPU | PCB_KERNFPU_THR);
PCB_KERNFPU | PCB_KERNFPU_THR);
MPASS((pcb2->pcb_flags & (PCB_KERNFPU | PCB_KERNFPU_THR)) == 0);
#define PCB_USER_FPU(pcb) (((pcb)->pcb_flags & PCB_KERNFPU) == 0)