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Diffstat (limited to 'README.md')
| -rw-r--r-- | README.md | 12 |
1 files changed, 11 insertions, 1 deletions
@@ -118,6 +118,13 @@ Tests are located in the tests subdirectory and can be executed using the test t $ make test +To use a separate (out-of-tree) build directory, provide a path to the Makefile. + + $ mkdir build; cd build + $ make -f ../Makefile + +Out-of-tree builds require a clean source tree. + Getting Started =============== @@ -274,6 +281,9 @@ Verilog Attributes and non-standard features temporary variable within an always block. This is mostly used internally by Yosys to synthesize Verilog functions and access arrays. +- The ``nowrshmsk`` attribute on a register prohibits the generation of + shift-and-mask type circuits for writing to bit slices of that register. + - The ``onehot`` attribute on wires mark them as one-hot state register. This is used for example for memory port sharing and set by the fsm_map pass. @@ -388,7 +398,7 @@ Verilog Attributes and non-standard features - The cell attribute ``wildcard_port_conns`` represents wildcard port connections (SystemVerilog ``.*``). These are resolved to concrete - connections to matching wires in ``hierarchy``. + connections to matching wires in ``hierarchy``. - In addition to the ``(* ... *)`` attribute syntax, Yosys supports the non-standard ``{* ... *}`` attribute syntax to set default attributes |