to instead write `+0.0` if `RA` is register `0`, at least
allowing clearing FPRs.
-| 0-5 | 6-10 | 11-25 | 26-30 | 31 |
-|--------|------|-------|-------|-----|
-| Major | FRT | FI | XO | FI0 |
+`fmvis` fits well with DX-Form:
-The above fits reasonably well with Minor 19 and follows the
-pattern shown by `addpcis`, which uses an entire column of Minor 19
-XO. 15 bits of FI fit into bits 11 to 25,
-the top bit FI0 (MSB0 numbered 0) makes 16.
+| 0-5 | 6-10 | 11-15 | 16-25 | 26-30 | 31 | Form
+|--------|------|-------|-------|-------|-----|-----|
+| Major | FRT | d1 | d0 | XO | d2 | DX-Form |
- bf16 = FI0 || FI
- fp32 = bf16 || [0]*16
- FRT = Single_to_Double(fp32)
-
-Also worth noting, `fmvis` fits well with DX-Form:
-
-| 0-5 | 6-10 | 11-15 | 16-25 | 26-30 | 31 |
-|--------|------|-------|-------|-------|-----|
-| Major | FRT | d0 | d1 | XO | d2 |
-
- bf16 = d2 || d1 || d0
+ bf16 = d0 || d1 || d2
fp32 = bf16 || [0]*16
FRT = Single_to_Double(fp32)