| UFix16 | Feldspar.FixedPoint, Feldspar |
| uFix16ToFloat | Feldspar.FixedPoint, Feldspar |
| uFix16ToInt | Feldspar.FixedPoint, Feldspar |
| UFix32 | Feldspar.FixedPoint, Feldspar |
| uFix32ToFloat | Feldspar.FixedPoint, Feldspar |
| uFix32ToInt | Feldspar.FixedPoint, Feldspar |
| UFix8 | Feldspar.FixedPoint, Feldspar |
| uFix8ToFloat | Feldspar.FixedPoint, Feldspar |
| uFix8ToInt | Feldspar.FixedPoint, Feldspar |
| uncurry | Feldspar.Prelude, Feldspar |
| undefined | Feldspar.Prelude, Feldspar |
| unfold | Feldspar.Stream |
| unfoldCore | Feldspar.Core.Functions, Feldspar.Core, Feldspar |
| unfreezeMatrix | Feldspar.Matrix, Feldspar |
| unfreezeVector | Feldspar.Vector, Feldspar |
| unit | Feldspar.Core.Expr, Feldspar.Core, Feldspar |
| UnitData | Feldspar.Core.Types |
| UnitType | Feldspar.Core.Types |
| universal | Feldspar.Core.Types, Feldspar.Core, Feldspar |
| unlines | Feldspar.Prelude, Feldspar |
| unlinesNoTrail | Feldspar.Haskell |
| Unsigned16 | Feldspar.Core.Types, Feldspar.Core, Feldspar |
| Unsigned32 | Feldspar.Core.Types, Feldspar.Core, Feldspar |
| Unsigned8 | Feldspar.Core.Types, Feldspar.Core, Feldspar |
| until | Feldspar.Prelude, Feldspar |
| unwords | Feldspar.Prelude, Feldspar |
| unzip |
| 1 (Function) | Feldspar.Vector, Feldspar |
| 2 (Function) | Feldspar.Stream |
| unzip3 | Feldspar.Prelude, Feldspar |
| uppBound | Feldspar.Range |
| upperBound | Feldspar.Range, Feldspar.Core, Feldspar |
| userError | Feldspar.Prelude, Feldspar |
| UserType | Feldspar.Core.Types |
