FPSCR_VX
#define FPSR_EX_MSK (FPSCR_VX|FPSCR_OX|FPSCR_UX|FPSCR_ZX| \
(~(FPSCR_VX|FPSR_EX) & (1<<(31-rt)));
((FPSCR_VX|FPSR_EX) & ~(1<<(31-rt)));
fsr |= FPSCR_VX;