FPSR_SNAN
if (fpsr & (FPSR_BSUN | FPSR_SNAN | FPSR_OPERR)) {
fpsr |= (FPSR_NAN | FPSR_SNAN);
fe->fe_fpsr |= FPSR_SNAN; /* assert SNAN exception */
fpsr |= FPSR_SNAN;
fpsr |= FPSR_NAN | FPSR_SNAN;
fe->fe_fpsr |= FPSR_SNAN;
fe->fe_fpsr |= FPSR_SNAN;
fpsr |= FPSR_SNAN;
fpsr |= FPSR_SNAN;
fpsr |= FPSR_SNAN;
# define FPCR_SNAN FPSR_SNAN