Get compressed assignment opcodes through to the ivl_target API.

design_dump.cc

@@ -824,6 +824,9 @@ void NetAssign::dump(ostream&o, unsigned ind) const
       o << setw(ind) << "";
       dump_lval(o);
 
+      if (op_)
+	    o << " " << op_ << "= ";
+      else
 	    o << " = ";
 
       if (const NetExpr*de = get_delay())

elaborate.cc

@@ -2271,7 +2271,7 @@ NetProc* PAssign::elaborate_compressed_(Design*des, NetScope*scope) const
       NetExpr*rv = elaborate_rval_(des, scope, count_lval_width(lv), lv->expr_type());
       if (rv == 0) return 0;
 
-      NetAssign*cur = new NetAssign(lv, rv);
+      NetAssign*cur = new NetAssign(lv, op_, rv);
       cur->set_line(*this);
 
       return cur;

ivl.def

@@ -272,6 +272,7 @@ ivl_stmt_lvals
 ivl_stmt_lwidth
 ivl_stmt_name
 ivl_stmt_nevent
+ivl_stmt_opcode
 ivl_stmt_parm
 ivl_stmt_parm_count
 ivl_stmt_rval

ivl_target.h

@@ -1995,6 +1995,13 @@ extern unsigned ivl_stmt_lineno(ivl_statement_t net);
  * the statement.) The ivl_stmt_delay_expr function returns the
  * expression for the delay, or nil if there is no delay expression.
  *
+ * The blocking assignment (IVL_ST_ASSIGN) may have an associated
+ * opcode, that can be extracted from ivl_stmt_opcode(). This opcode
+ * is the compressed operator used it statements like this:
+ *      foo += <expr>
+ * The ivl_stmt_opcode() returns null (0) if this is not a compressed
+ * assignment statment.
+ *
  * - IVL_ST_CASSIGN
  * This reflects a procedural continuous assignment to an l-value. The
  * l-value is the same as any other assignment (use ivl_stmt_lval).
@@ -2088,6 +2095,8 @@ extern unsigned ivl_stmt_lvals(ivl_statement_t net);
 extern unsigned ivl_stmt_lwidth(ivl_statement_t net);
   /* IVL_ST_STASK */
 extern const char* ivl_stmt_name(ivl_statement_t net);
+  /* IVL_ST_ASSIGN */
+extern char ivl_stmt_opcode(ivl_statement_t net);
   /* IVL_ST_STASK */
 extern ivl_expr_t ivl_stmt_parm(ivl_statement_t net, unsigned idx);
   /* IVL_ST_STASK */

net_assign.cc

@@ -233,7 +233,12 @@ const NetExpr* NetAssignBase::get_delay() const
 }
 
 NetAssign::NetAssign(NetAssign_*lv, NetExpr*rv)
-: NetAssignBase(lv, rv)
+: NetAssignBase(lv, rv), op_(0)
+{
+}
+
+NetAssign::NetAssign(NetAssign_*lv, char op, NetExpr*rv)
+: NetAssignBase(lv, rv), op_(op)
 {
 }
 

netlist.h

@@ -2406,15 +2406,19 @@ class NetAssign : public NetAssignBase {
 
     public:
       explicit NetAssign(NetAssign_*lv, NetExpr*rv);
+      explicit NetAssign(NetAssign_*lv, char op, NetExpr*rv);
       ~NetAssign();
 
       bool is_asynchronous();
 
+      inline char assign_operator(void) const { return op_; }
+
       virtual bool emit_proc(struct target_t*) const;
       virtual int match_proc(struct proc_match_t*);
       virtual void dump(ostream&, unsigned ind) const;
 
     private:
+      char op_;
 };
 
 class NetAssignNB  : public NetAssignBase {

t-dll-api.cc

@@ -2547,6 +2547,17 @@ extern "C" const char* ivl_stmt_name(ivl_statement_t net)
       return 0;
 }
 
+extern "C" char ivl_stmt_opcode(ivl_statement_t net)
+{
+      switch (net->type_) {
+	  case IVL_ST_ASSIGN:
+	    return net->u_.assign_.oper;
+	  default:
+	    assert(0);
+      }
+      return 0;
+}
+
 extern "C" ivl_expr_t ivl_stmt_parm(ivl_statement_t net, unsigned idx)
 {
       switch (net->type_) {

t-dll-proc.cc

@@ -210,6 +210,7 @@ bool dll_target::proc_assign(const NetAssign*net)
 	/* Make the lval fields. */
       make_assign_lvals_(net);
 
+      stmt_cur_->u_.assign_.oper = net->assign_operator();
       assert(expr_ == 0);
       net->rval()->expr_scan(this);
       stmt_cur_->u_.assign_.rval_ = expr_;

t-dll.h

@@ -729,6 +729,7 @@ struct ivl_statement_s {
 			IVL_ST_CASSIGN, IVL_ST_DEASSIGN */
 		  unsigned lvals_;
 		  struct ivl_lval_s*lval_;
+		  char oper; // Operator if this is a compressed assignment.
 		  ivl_expr_t rval_;
 		  ivl_expr_t delay;
 		    // The following are only for NB event control.

tgt-stub/statement.c

@@ -179,6 +179,7 @@ void show_stmt_wait(ivl_statement_t net, unsigned ind)
 void show_statement(ivl_statement_t net, unsigned ind)
 {
       unsigned idx;
+      char opcode = 0;
       const ivl_statement_type_t code = ivl_statement_type(net);
 
       switch (code) {
@@ -188,8 +189,11 @@ void show_statement(ivl_statement_t net, unsigned ind)
             break;
 
 	  case IVL_ST_ASSIGN:
-	    fprintf(out, "%*sASSIGN <lwidth=%u>\n", ind, "",
+	    opcode = ivl_stmt_opcode(net);
-		    ivl_stmt_lwidth(net));
+	    if (opcode == 0)
+		  opcode = ' ';
+	    fprintf(out, "%*sASSIGN <lwidth=%u> opcode=%c\n", ind, "",
+		    ivl_stmt_lwidth(net), opcode);
 
 	    for (idx = 0 ;  idx < ivl_stmt_lvals(net) ;  idx += 1)
 		  show_assign_lval(ivl_stmt_lval(net, idx), ind+4);

tgt-vvp/vvp_process.c

@@ -565,6 +565,7 @@ static int show_stmt_alloc(ivl_statement_t net)
 static int show_stmt_assign_vector(ivl_statement_t net)
 {
       ivl_expr_t rval = ivl_stmt_rval(net);
+      struct vector_info res;
 
 	/* Handle the special case that the expression is a real
 	   value. Evaluate the real expression, then convert the
@@ -576,12 +577,10 @@ static int show_stmt_assign_vector(ivl_statement_t net)
 		 assignment. */
 	    unsigned wid = ivl_stmt_lwidth(net);
 
-	    struct vector_info vec;
+	    res.base = allocate_vector(wid);
+	    res.wid = wid;
 
-	    vec.base = allocate_vector(wid);
+	    if (res.base == 0) {
-	    vec.wid = wid;
-
-	    if (vec.base == 0) {
 		  fprintf(stderr, "%s:%u: vvp.tgt error: "
 			  "Unable to allocate %u thread bits for "
 			  "r-value expression.\n", ivl_expr_file(rval),
@@ -590,22 +589,20 @@ static int show_stmt_assign_vector(ivl_statement_t net)
 	    }
 
 	    fprintf(vvp_out, "    %%cvt/vr %u, %d, %u;\n",
-		    vec.base, word, vec.wid);
+		    res.base, word, res.wid);
 
 	    clr_word(word);
 
-	    set_vec_to_lval(net, vec);
+      } else {
-
+	    res = draw_eval_expr(rval, 0);
-	    clr_vector(vec);
-	    return 0;
       }
 
+      if (ivl_stmt_opcode(net) != 0)
+	    fprintf(vvp_out, "; UNSUPPORTED ASSIGNMENT OPCODE: %c\n", ivl_stmt_opcode(net));
 
-      { struct vector_info res = draw_eval_expr(rval, 0);
       set_vec_to_lval(net, res);
       if (res.base > 3)
 	    clr_vector(res);
-      }
 
 
       return 0;