4.5.1 Reserved Names
The following symbol names (case-insensitive) are reserved for the assembler.
Do not use .equ, .equiv or .set (See 5 Assembler Directives) with these
symbols.
| W0 | W1 | W2 | W3 | W4 | W5 | W6 | W7 |
| W8 | W9 | W10 | W11 | W12 | W13 | W14 | W15 |
| WREG | A | B | OV | C | Z | N | GE |
| LT | GT | LE | NOV | NC | NZ | NN | GEU |
| LTU | GTU | LEU | OA | OB | SA | SB |
