void fpu_clear_exceptions(void) { struct __attribute__((packed)) { uint16_t fpuc; uint16_t dummy1; uint16_t fpus; uint16_t dummy2; uint16_t fptag; uint16_t dummy3; uint32_t ignored[4]; long double fpregs[8]; } float_env32; asm volatile ("fnstenv %0\n" : : "m" (float_env32)); float_env32.fpus &= ~0x7f; asm volatile ("fldenv %0\n" : : "m" (float_env32)); }