ruby: slicc: replace max_in_port_rank with number of inports

This patch replaces max_in_port_rank with the number of inports.  The use of
max_in_port_rank was causing spurious re-builds and incorrect initialization
of variables in ruby related regression tests.  This was due to the variable
value being used across threads while compiling when it was not meant to be.

Since the number of inports is state machine specific value, this problem
should get solved.

src/mem/ruby/slicc_interface/AbstractController.cc

@@ -104,10 +104,10 @@ AbstractController::stallBuffer(MessageBuffer* buf, Address addr)
 {
     if (m_waiting_buffers.count(addr) == 0) {
         MsgVecType* msgVec = new MsgVecType;
-        msgVec->resize(m_max_in_port_rank, NULL);
+        msgVec->resize(m_in_ports, NULL);
         m_waiting_buffers[addr] = msgVec;
     }
-    (*(m_waiting_buffers[addr]))[m_cur_in_port_rank] = buf;
+    (*(m_waiting_buffers[addr]))[m_cur_in_port] = buf;
 }
 
 void
@@ -118,7 +118,7 @@ AbstractController::wakeUpBuffers(Address addr)
         // Wake up all possible lower rank (i.e. lower priority) buffers that could
         // be waiting on this message.
         //
-        for (int in_port_rank = m_cur_in_port_rank - 1;
+        for (int in_port_rank = m_cur_in_port - 1;
              in_port_rank >= 0;
              in_port_rank--) {
             if ((*(m_waiting_buffers[addr]))[in_port_rank] != NULL) {
@@ -138,7 +138,7 @@ AbstractController::wakeUpAllBuffers(Address addr)
         // Wake up all possible lower rank (i.e. lower priority) buffers that could
         // be waiting on this message.
         //
-        for (int in_port_rank = m_max_in_port_rank - 1;
+        for (int in_port_rank = m_in_ports - 1;
              in_port_rank >= 0;
              in_port_rank--) {
             if ((*(m_waiting_buffers[addr]))[in_port_rank] != NULL) {

src/mem/ruby/slicc_interface/AbstractController.hh

@@ -145,8 +145,8 @@ class AbstractController : public ClockedObject, public Consumer
     typedef std::vector<MessageBuffer*> MsgVecType;
     typedef std::map< Address, MsgVecType* > WaitingBufType;
     WaitingBufType m_waiting_buffers;
-    int m_max_in_port_rank;
-    int m_cur_in_port_rank;
+    unsigned int m_in_ports;
+    unsigned int m_cur_in_port;
     int m_number_of_TBEs;
 
     //! Map from physical network number to the Message Buffer.

src/mem/slicc/ast/InPortDeclAST.py

@@ -30,8 +30,6 @@ from slicc.ast.TypeAST import TypeAST
 from slicc.symbols import Func, Type, Var
 
 class InPortDeclAST(DeclAST):
-    max_port_rank = 0
-    
     def __init__(self, slicc, ident, msg_type, var_expr, pairs, statements):
         super(InPortDeclAST, self).__init__(slicc, pairs)
 
@@ -40,9 +38,6 @@ class InPortDeclAST(DeclAST):
         self.var_expr = var_expr
         self.statements = statements
         self.queue_type = TypeAST(slicc, "InPort")
-        if self.pairs.has_key("rank"):
-            InPortDeclAST.max_port_rank = max(self.pairs["rank"],
-                                              InPortDeclAST.max_port_rank)
 
     def __repr__(self):
         return "[InPortDecl: %s]" % self.ident
@@ -120,6 +115,3 @@ class InPortDeclAST(DeclAST):
 
         # Add port to state machine
         machine.addInPort(in_port)
-
-        # Include max_rank to be used by StateMachine.py
-        in_port["max_port_rank"] = InPortDeclAST.max_port_rank

src/mem/slicc/symbols/StateMachine.py

@@ -460,12 +460,8 @@ $c_ident::$c_ident(const Params *p)
 {
     m_name = "${ident}";
 ''')
-        #
-        # max_port_rank is used to size vectors and thus should be one plus the
-        # largest port rank
-        #
-        max_port_rank = self.in_ports[0].pairs["max_port_rank"] + 1
-        code('    m_max_in_port_rank = $max_port_rank;')
+        num_in_ports = len(self.in_ports)
+        code('    m_in_ports = $num_in_ports;')
         code.indent()
 
         #
@@ -1104,9 +1100,9 @@ ${ident}_Controller::wakeup()
             code.indent()
             code('// ${ident}InPort $port')
             if port.pairs.has_key("rank"):
-                code('m_cur_in_port_rank = ${{port.pairs["rank"]}};')
+                code('m_cur_in_port = ${{port.pairs["rank"]}};')
             else:
-                code('m_cur_in_port_rank = 0;')
+                code('m_cur_in_port = 0;')
             code('${{port["c_code_in_port"]}}')
             code.dedent()