### Logical
+* 10-bit, ignore bits 0-4 (used by EXTNNN=Compressed)
+* 16-bit: note that bit 1==0 (sub-sub-encoding)
+
| 16-bit mode | | 10-bit mode |
| 0 | 1 | 2 3 4 | | 567.8 | 9ab | c d e | f |
| N | 0 | RT | | 100.0 | RB | RA!=0 | M | and
| N | 0 | RT | | 101.0 | RB | 0 0 0 | M | popcnt
| N | 0 | RT | | 101.1 | RB | 0 0 0 | M | not
-16-bit mode only:
+16-bit mode only (note that bit 1 == 1):
| 0 | 1 | 2 3 4 | | 567.8 | 9ab | c d e | f |
| N | 1 | RT | | 100.0 | RB | RA!=0 | 0 | TBD
Note here that elwidth overrides (SV Prefix) can be used to select FP16/32/64
+* 10-bit, ignore bits 0-4 (used by EXTNNN=Compressed)
+* 16-bit: note that bit 1==0 (sub-sub-encoding)
+
| 16-bit mode | | 10-bit mode |
| 0 | 1 | 2 3 4 | | 567.8 | 9ab | c d e | f |
| N | | RT | | 011.1 | RB | RA!=0 | M | fsub.
| N | 0 | RT | | 110.0 | RB | 0 0 0 | M |
| N | 0 | RT | | 110.1 | RB | 0 0 0 | M |
-16-bit mode only:
+16-bit mode only (note that bit 1 == 1):
| 0 | 1 | 2 3 4 | | 567.8 | 9ab | c d e | f |
| N | 1 | RT | | 011.1 | RB | RA!=0 | 0 |