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Diffstat (limited to 'doc/using')
| -rw-r--r-- | doc/using/ImplementationOfVHDL.rst | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/doc/using/ImplementationOfVHDL.rst b/doc/using/ImplementationOfVHDL.rst index 42681dcc9..c0a39c276 100644 --- a/doc/using/ImplementationOfVHDL.rst +++ b/doc/using/ImplementationOfVHDL.rst @@ -31,6 +31,8 @@ VHDL standards .. index:: v08 +.. index:: v19 + Unfortunately, there are many versions of the VHDL language, and they aren't backward compatible. @@ -67,7 +69,7 @@ Minor corrections were added by the 2002 revision of the VHDL standard. This revision is not fully backward compatible with VHDL-00 since, for example, the value of the `'instance_name` attribute has slightly changed. -The latest version is 2008. Many features have been added, and GHDL +The latest version is 2019. Many features have been added, and GHDL doesn't implement all of them. You can select the VHDL standard expected by GHDL with the @@ -93,6 +95,9 @@ You can select the VHDL standard expected by GHDL with the 08 Select VHDL-2008 standard (partially implemented). +19 + Select VHDL-2019 standard (partially implemented). + Multiple standards can be used in a design: +-----+----------------+ @@ -104,6 +109,8 @@ Multiple standards can be used in a design: +-----+----------------+ | 08 | 08 | +-----+----------------+ +| 19 | 19 | ++-----+----------------+ .. note:: @@ -175,7 +182,7 @@ GHDL understands embedded PSL annotations in VHDL files: ghdl -a -fpsl vhdl_design.vhdl ghdl -e vhdl_design -PSL annotations (VHDL-2008 only) +PSL annotations (VHDL-2008 and later) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Since VHDL-2008 PSL is integrated in the VHDL language. You can use @@ -197,7 +204,7 @@ PSL in a VHDL(-2008) design without embedding it in comments. ghdl -a --std=08 vhdl_design.vhdl ghdl -e --std=08 vhdl_design -PSL vunit files (VHDL-2008 / Synthesis only) +PSL vunit files (VHDL-2008 and later, synthesis only) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ GHDL supports vunit (Verification Unit) files. @@ -269,7 +276,7 @@ changed with the :option:`--work` option of GHDL. To keep the list of design units in a design library, GHDL creates library files. The name of these files is :file:`<LIB_NAME>-obj<GROUP>.cf`, where `<LIB_NAME>` is the name of the library, and `<GROUP>` the VHDL version (87, -93 or 08) used to analyze the design units. +93, 08, or 19) used to analyze the design units. For details on ``GROUP`` values see section :ref:`VHDL_standards`. |