Quartus® II support for subprograms and packages 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) |
|---|---|---|---|
| 2.1 | Subprogram Declarations | Supported as defined in subsections 2.1.1 through 2.1.1.2. | Supported as defined in subsections 2.1.1 through 2.1.1.2. |
| 2.1.1 | Formal Parameters | Supported. | Supported. |
| 2.1.1.1 | Constant & Variable Parameters | Supported. | Supported. |
| 2.1.1.2 | Signal Parameters | Supported. | Supported. |
| 2.1.1.3 (1993) | File Parameters | n/a | Not supported. |
| 2.2 | Subprogram Bodies | Supported. | Supported. |
| 2.3 | Subprogram Overloading | Supported. | Supported. |
| 2.3.1 | Operator Overloading | Supported. | Supported. |
| 2.3.2 (1993) | Signatures | n/a | Supported. |
| 2.4 | Resolution Functions | Supported. | Supported. |
| 2.5 | Package Declarations | Supported. | Supported. |
| 2.6 | Package Bodies | Supported. | Supported. |
| 2.7 | Conformance Rules | Supported. | Supported. |
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