More trials on SystemVerilog to Verilog translators.

* New: In designflow.surelog, support for the Synlig Surelog/UHDM plugin
    for Yosys.
* Fix: In designflow.svase, remove the transient file "slang-args.txt".
* Change: In designflow.yosys, remove the direct SystemVerilog support
    that is delegated to Surelog and just load the resulting UHDM.
      Merge with yosysnp and automatically detect if we can load the
    Python plugin or go through a script.

cumulus/src/CMakeLists.txt

@@ -17,6 +17,7 @@
                                   ${CMAKE_CURRENT_SOURCE_DIR}/designflow/dreal.py
                                   ${CMAKE_CURRENT_SOURCE_DIR}/designflow/sv2v.py
                                   ${CMAKE_CURRENT_SOURCE_DIR}/designflow/svase.py
+                                  ${CMAKE_CURRENT_SOURCE_DIR}/designflow/surelog.py
                                   ${CMAKE_CURRENT_SOURCE_DIR}/designflow/yosys.py
                                   ${CMAKE_CURRENT_SOURCE_DIR}/designflow/blif2vst.py
                                   ${CMAKE_CURRENT_SOURCE_DIR}/designflow/pnr.py

cumulus/src/designflow/clean.py

@@ -1,4 +1,5 @@
 
+import shutil
 from pathlib import Path
 from doit.exceptions import TaskFailed
 from .task import FlowTask
@@ -37,6 +38,9 @@ class Clean ( FlowTask ):
                 if filePath.is_file():
                     print( '   - {:<40} [removed]'.format( filePath.as_posix() ))
                     filePath.unlink()
+                elif filePath.is_dir():
+                    print( '   - {:<40} [removed (directory)]'.format( filePath.as_posix() ))
+                    shutil.rmtree( filePath )
                 else:
                     print( '   - {}'.format( filePath.as_posix() ))
         if doExtrasClean and len(self.extrasGlobs):

cumulus/src/designflow/surelog.py

@@ -0,0 +1,70 @@
+
+import os.path
+import shutil
+import subprocess
+from   pathlib import Path
+from   doit.exceptions import TaskFailed
+from   .task           import FlowTask
+
+
+def printCommand ( command ):
+    commandBin = command[0]
+    print( commandBin, command[1] )
+    for arg in command[2:]:
+        print( ' '*len(commandBin), arg )
+
+
+class Surelog ( FlowTask ):
+
+    @staticmethod
+    def mkRule ( rule, depends, top, incdirs=[], libdirs=[], defines=[], options=[], flags=0 ):
+        return Surelog( rule, depends, top, incdirs, libdirs, defines, options, flags )
+
+    def __init__ ( self, rule, depends, top, incdirs, libdirs, defines, options, flags ):
+        self.flags   = flags
+        self.top     = top
+        self.incdirs = incdirs
+        self.libdirs = libdirs
+        self.defines = defines
+        self.options = options
+        self.success = True
+        targets = FlowTask._normFileList( [ self.top + '.uhdm' ] )
+        depends = FlowTask._normFileList( depends )
+        super().__init__( rule, targets, depends )
+        self.addClean( targets )
+
+    def __repr__ ( self ):
+        return '<surelog {} top={}>'.format( self.main, self.top )
+
+    @property
+    def main ( self ):
+        return self.file_depend( 0 )
+
+    def doTask ( self ):
+        from ..helpers.io import ErrorMessage
+        for incdir in self.incdirs:
+            if not Path(incdir).is_dir():
+                e = ErrorMessage( 1, [ 'Surelog.doTask(): Include directory not found "{}"'
+                                     , '"{}"'.format( incdir ) ] )
+                return TaskFailed( e )
+        command  = [ 'surelog', '-parse' ]
+        command += [ ' '.join( self.options ) ]
+        command += [ '-D{}'.format(d) for d in self.defines ]
+        command += [ '-I{}'.format(i) for i in self.incdirs ]
+        for libdir in self.libdirs:
+            command += [ '-L', libdir ]
+        command += [ '-top', self.top ]
+        command += [ depend.as_posix() for depend in self.depends ]
+        printCommand( command )
+        status = subprocess.call( command )
+        if status != 0: return False
+        shutil.move( 'slpp_all/surelog.uhdm', self.file_target(0) )
+        return True
+
+    def create_doit_tasks ( self ):
+        return { 'basename' : self.basename
+               , 'actions'  : [ self.doTask ]
+               , 'doc'      : 'Run {}.'.format( self )
+               , 'file_dep' : self.file_dep
+               , 'targets'  : self.targets
+               }

cumulus/src/designflow/svase.py

@@ -37,6 +37,7 @@ class Svase ( FlowTask ):
        #if self.flags & Svase.FlagLog:
        #    self.log = Path( self.top + '.log' )
        #    targets.append( self.log )
+        targets.append( './slang-args.txt' )
         super().__init__( rule, targets, depends )
         self.addClean( targets )
 

cumulus/src/designflow/yosys.py

@@ -110,8 +110,12 @@ class Yosys ( FlowTask ):
             self.success = TaskFailed( e )
             return
         design = Path( design )
-        if   design.suffix == '.v' : self.script.append( 'read_verilog -sv {}'.format( design.as_posix() ))
+        if   design.suffix == '.v'   :
+            self.script.append( 'read_verilog -sv {}'.format( design.as_posix() ))
         elif design.suffix == '.il'  : self.script.append( 'read_ilang       {}'.format( design.as_posix() ))
+        elif design.suffix == '.uhdm':
+            self.script.append( 'plugin -i systemverilog' )
+            self.script.append( 'read_uhdm {}'.format( design.as_posix() ))
         else:
             e = ErrorMessage( 1, 'Yosys._loadDesign(): Unsupported input format for "{}".'.format( design ))
             self.success = TaskFailed( e )
@@ -193,7 +197,7 @@ class Yosys ( FlowTask ):
             e = ErrorMessage( 1, [ 'Yosys.doTask(): File not found "{}"'
                                  , '"{}"'.format( self.liberty.as_posix() ) ] )
             return TaskFailed( e )
-       #print( 'Yosys.doTask() on "{}"'.format( self.design ))
+        #print( 'Yosys.doTask() on "{}"'.format( self.main ))
         self._loadBlackboxes()
         if self.flags & Yosys.FlagSystemVerilog:
             self._loadSVDesign()