Make fake yosys/openroad/klayout executables for flow testing

With these you can "run" any design in seconds with:

make OPENROAD_CMD=test/fake_openroad YOSYS_EXE=test/fake_yosys KLAYOUT_CMD=test/fake_klayout

You'll get a log of all the commands that would be executed by these tools.

Signed-off-by: Matt Liberty <[email protected]>

Author: maliberty

flow/scripts/floorplan.tcl

@@ -111,7 +111,7 @@ if { [env_var_exists_and_non_empty FASTROUTE_TCL] } {
 
 source_env_var_if_exists FOOTPRINT_TCL
 
-if { ![env_var_equal SKIP_REPAIR_TIE_FANOUT 1] } {
+if { ![env_var_equals SKIP_REPAIR_TIE_FANOUT 1] } {
   # This needs to come before any call to remove_buffers.  You could have one
   # tie driving multiple buffers that drive multiple outputs.
   # Repair tie lo fanout

flow/test/fake_klayout

@@ -0,0 +1,9 @@
+#!/usr/bin/env python3
+
+import sys
+
+for arg in sys.argv[1:]:
+    if arg.startswith("out_file="):
+       _, file_name = arg.split('=', 1)
+       with open(file_name, 'w') as f:
+           pass

flow/test/fake_openroad

@@ -0,0 +1,47 @@
+#!/usr/bin/env tclsh
+
+proc unknown {cmd args} {
+  puts "'$cmd $args'"
+
+  # The return value is arbitrary but this seems to get through the flow
+  # The empty string fails as a boolean and 0 leads to a divide by zero.
+  return 1
+}
+
+# Create the (empty) output files
+proc write_db {args} {
+  set filename [lindex $args end]
+  close [open $filename w]
+}
+
+proc write_sdc {args} {
+  set filename [lindex $args end]
+  close [open $filename w]
+}
+
+set i 0
+while {$i < $argc} {
+  set arg [lindex $argv $i]
+  if {$arg == "-help"} {
+  } elseif {$arg == "-version"} {
+  } elseif {$arg == "-no_init"} {
+  } elseif {$arg == "-threads"} {
+    incr i
+  } elseif {$arg == "-no_splash"} {
+  } elseif {$arg == "-exit"} {
+  } elseif {$arg == "-gui"} {
+  } elseif {$arg == "-no_settings"} {
+  } elseif {$arg == "-python"} {
+    puts "-python not supported"
+    exit 1
+  } elseif {$arg == "-log"} {
+    incr i
+  } elseif {$arg == "-metrics"} {
+    incr i
+  } elseif {$arg == "-db"} {
+    incr i
+  } else {
+    source $arg
+  }
+  incr i
+}

flow/test/fake_yosys

@@ -0,0 +1,38 @@
+#!/usr/bin/env tclsh
+
+proc unknown {cmd args} {
+  puts "'$cmd $args'"
+
+  # The return value is arbitrary but this seems to get through the flow
+  # The empty string fails as a boolean and 0 leads to a divide by zero.
+  return 1
+}
+
+# Create the (empty) output files
+proc json {args} {
+  set filename [lindex $args end]
+  set f [open $filename w]
+  puts $f "{ \"modules\": {} }"
+  close $f
+}
+
+proc write_verilog {args} {
+  set filename [lindex $args end]
+  close [open $filename w]
+}
+
+set i 0
+while {$i < $argc} {
+  set arg [lindex $argv $i]
+  if {$arg == "-V"} {
+  } elseif {$arg == "-v"} {
+    incr i
+  } elseif {$arg == "-c"} {
+    incr i
+    source [lindex $argv $i]
+  } else {
+    puts "Unknown arg $arg"
+    exit 1
+  }
+  incr i
+}