Quartus® II support for expressions is described below. Section numbers match those in both the IEEE Std 1076-1987 and the IEEE Std 1076-1993 versions of the IEEE Standard VHDL Language Reference Manual.
| Section | VHDL Construct | VHDL 1987 Support Note (1) | VHDL 1993 Support Note (1) |
|---|---|---|---|
| 7.1 | Expressions | Supported. | Supported. |
| 7.2 | Operators | Supported as defined below. | Supported as defined below. |
| 7.2.1 | Logical Operators | Supported. | Supported. |
| 7.2.2 | Relational Operators | Supported. | Supported. |
| 7.2.3 (1993) | Shift Operators | n/a | Supported. |
| 7.2.3 (1987) 7.2.4 (1993) |
Adding Operators | Supported. | Supported. |
| 7.2.4 (1987) 7.2.6 (1993) |
Multiplying Operators | Supported. | Supported. |
| 7.2.5 (1993) | Sign Operators | n/a | Supported. |
| 7.2.5 (1987) 7.2.7 (1993) |
Miscellaneous Operators | Supported. ** (exponentiation) is supported only for constant left-hand side (LHS) and right-hand side (RHS) operands. For example, 2**5. |
Supported. ** (exponentiation) is supported only for constant left-hand side (LHS) and right-hand side (RHS) operands. For example, 2**5. |
| 7.3 | Operands | Supported as defined below. | Supported as defined below. |
| 7.3.1 | Literals | Supported | Supported |
| 7.3.2 | Aggregates | Supported for one- and two-dimensional arrays of scalar elements only. | Supported for one- and two-dimensional arrays of scalar elements only. |
| 7.3.2.1 | Record Aggregates | Not supported | Not supported |
| 7.3.2.2 | Array Aggregates | Supported for one- and two-dimensional arrays of scalar elements only | Supported for one- and two-dimensional arrays of scalar elements only |
| 7.3.3 | Function Calls | Supported for Process Statements | Supported for Process Statements |
| 7.3.4 | Qualified Expressions | Supported | Supported |
| 7.3.5 | Type Conversions | Supported | Supported |
| 7.3.6 | Allocators | Not supported. | Not supported. |
| 7.4 | Static Expressions | Supported | Supported |
| 7.4.1 (1993) | Locally Static Primaries | n/a | Not Supported |
| 7.4.2 (1993) | Globally Static Primaries | n/a | Not Supported |
| 7.5 | Universal Expressions | Supported | Supported |
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