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| -rw-r--r-- | doc/using/InvokingGHDL.rst | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/doc/using/InvokingGHDL.rst b/doc/using/InvokingGHDL.rst index 22061445e..4940637f5 100644 --- a/doc/using/InvokingGHDL.rst +++ b/doc/using/InvokingGHDL.rst @@ -414,16 +414,18 @@ Options .. option:: --time-resolution=<UNIT> + .. ATTENTION:: + This feature is supported with *mcode* backend only. It is not possible to support it with either LLVM or GCC backends, + because it needs to apply globally. + Set the base time resolution of the simulation. This option is supported in commands :option:`-a` and :option:`-r` only. - Allowed values are ``auto`` (default with *mcode*), ``fs`` (default with LLVM/GCC), ``ps``, ``ns``, ``us``, ``ms`` or ``sec``. + Allowed values are ``auto`` (default), ``fs``, ``ps``, ``ns``, ``us``, ``ms`` or ``sec``. With LLVM/GCC, the value is fixed + to ``fs``. .. HINT:: When overriding the time resolution, all the time units that are used in the design must be larger. Using units below the resolution will produce a failure. - .. ATTENTION:: - This feature is supported with *mcode* backend only. It is not possible to support it with either LLVM or GCC backends, - because it needs to apply globally. Warnings ======== |