orig:	01111111110000000000000000000000	val=nan
exp_bits=8, frac_bits=23, frac_mask=7fffff, payload_bits=22, payload_mask=3fffff
frcmsk:	00000000011111111111111111111111
paymsk:	00000000001111111111111111111111
+NAN/0x01:	01111111110000000000000000000001	val=nan
-NAN/0x01:	11111111110000000000000000000001	val=-nan
flt: val with -NAN667=-nan
flt: payload of -NAN667=667
dbl: val with -NAN667=-nan
dbl: payload of -NAN667=667
dbl: payload of sys_cast float(-NAN667)=0
dbl: payload of own_cast float(-NAN667)=667
ldbl: val with -NAN667=-nan
ldbl: payload of -NAN667=667
ldbl: payload of sys_cast double(-NAN667)=0
ldbl: payload of own_cast double(-NAN667)=667
ldbl(i387): val with -NAN667=-nan
ldbl(i387): payload of -NAN667=667
ldbl(i387): payload of -NAN667=667 (i387)
ldbl(i387): payload of sys_cast double(-NAN667)=0
ldbl(i387): payload of own_cast double(-NAN667)=667
flt:  payload of plain NAN=0
dbl:  payload of plain NAN=0
ldbl: payload of plain NAN=0
flt:  payload of plain nanf()=0
dbl:  payload of plain nan()=0
ldbl: payload of plain nanl()=0
flt:  payload of nan=-nan from sinf(inf)=0
dbl:  payload of nan=-nan from sin(inf)=0
ldbl: payload of nan=-nan from sinl(inf)=0