| R | Data.Hardware.Internal, Data.Hardware, Wired |
| rectiDistance | Data.Hardware.Internal |
| rectiSpanning | Data.Hardware.Internal |
| red | Layout.Internal, Layout, Wired |
| RelBlock | Layout.Internal |
| renderFloorplan | Layout.Internal |
| renderFloorplan_ | Layout.Internal |
| renderLayout | Layout.Internal, Layout, Wired |
| renderLayoutT | Layout.Internal, Layout, Wired |
| renderWired | Wired.Model, Wired |
| renderWiredWithNets | Wired.Model, Wired |
| renderWiredWithNetsCol | Wired.Model, Wired |
| replicateM | Lava, Wired |
| replicateM_ | Lava, Wired |
| Res | |
| 1 (Data Constructor) | Data.Hardware.Internal |
| 2 (Type/Class) | Data.Hardware.Internal, Data.Hardware, Wired |
| Resistance | Data.Hardware.Internal |
| result | Data.Hardware.Internal, Data.Hardware, Wired |
| return | Lava, Wired |
| riffle | Lava.Patterns |
| Rightwards | Data.Hardware.Internal |
| rightwards | Layout.Internal, Layout, Wired |
| rightwards' | Layout.Internal, Layout, Wired |
| Rising | Analysis.Timing.Library |
| rotate | Layout.Internal, Layout, Wired |
| rotate_ | Layout.Internal, Layout, Wired |
| Row | Layout.Internal |
| row | Lava.Patterns |
| rowHeight | Wired.Model, Wired |
| runLava | Lava.Internal |
| runLayout | Layout.Internal |
| runLayoutT | Layout.Internal |
| runLet | Data.Logical.Let |
| runLetT | Data.Logical.Let |
| runWired | Wired.Model |