1. Verilog表达式的位宽计算
可以简单查这个表是否会自动做位宽扩展
L(i)的意思是i的位宽
| Expression | Bit length | Comments |
|---|---|---|
| unsized constant | 32 bits | Self-determined |
| sized constant | as specified | Self-determined |
| i + j | max(L(i),L(j)) | Context-determined |
| i – j | max(L(i),L(j)) | Context-determined |
| i * j | max(L(i),L(j)) | Context-determined |
| i / j | max(L(i),L(j)) | Context-determined |
| i % j | max(L(i),L(j)) | Context-determined |
| i & j | max(L(i),L(j)) | Context-determined |
| i | j | max(L(i),L(j))</ |
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