Fixed some visual studio warnings

frontends/ast/ast.cc

@@ -820,7 +820,7 @@ uint64_t AstNode::asInt(bool is_signed)
 	}
 
 	if (type == AST_REALVALUE)
-		return realvalue;
+		return uint64_t(realvalue);
 
 	log_abort();
 }

frontends/ast/genrtlil.cc

@@ -1257,7 +1257,7 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint)
 			if (type == AST_MEMINIT) {
 				if (children[2]->type != AST_CONSTANT)
 					log_error("Memory init with non-constant word count at %s:%d!\n", filename.c_str(), linenum);
-				num_words = children[2]->asInt(false);
+				num_words = int(children[2]->asInt(false));
 				cell->parameters["\\WORDS"] = RTLIL::Const(num_words);
 			}
 

frontends/ast/simplify.cc

@@ -1705,7 +1705,7 @@ skip_dynamic_range_lvalue_expansion:;
 					while (node_addr->simplify(true, false, false, stage, width_hint, sign_hint, false)) { }
 					if (node_addr->type != AST_CONSTANT)
 						log_error("Failed to evaluate system function `%s' with non-constant 3rd argument at %s:%d.\n", str.c_str(), filename.c_str(), linenum);
-					start_addr = node_addr->asInt(false);
+					start_addr = int(node_addr->asInt(false));
 				}
 
 				if (GetSize(children) > 3) {
@@ -1713,7 +1713,7 @@ skip_dynamic_range_lvalue_expansion:;
 					while (node_addr->simplify(true, false, false, stage, width_hint, sign_hint, false)) { }
 					if (node_addr->type != AST_CONSTANT)
 						log_error("Failed to evaluate system function `%s' with non-constant 4th argument at %s:%d.\n", str.c_str(), filename.c_str(), linenum);
-					finish_addr = node_addr->asInt(false);
+					finish_addr = int(node_addr->asInt(false));
 				}
 
 				bool unconditional_init = false;

kernel/hashlib.h

@@ -74,7 +74,7 @@ template<> struct hash_ops<int32_t> : hash_int_ops
 template<> struct hash_ops<int64_t> : hash_int_ops
 {
 	static inline unsigned int hash(int64_t a) {
-		return mkhash(a, a >> 32);
+		return mkhash((unsigned int)(a), (unsigned int)(a >> 32));
 	}
 };
 

kernel/modtools.h

@@ -180,8 +180,8 @@ struct ModIndex : public RTLIL::Monitor
 		{
 			RTLIL::SigBit lhs = sigmap(sigsig.first[i]);
 			RTLIL::SigBit rhs = sigmap(sigsig.second[i]);
-			bool has_lhs = database.count(lhs);
-			bool has_rhs = database.count(rhs);
+			bool has_lhs = database.count(lhs) != 0;
+			bool has_rhs = database.count(rhs) != 0;
 
 			if (!has_lhs && !has_rhs) {
 				sigmap.add(lhs, rhs);

kernel/yosys.cc

@@ -193,7 +193,7 @@ std::string vstringf(const char *fmt, va_list ap)
 
 int readsome(std::istream &f, char *s, int n)
 {
-	int rc = f.readsome(s, n);
+	int rc = int(f.readsome(s, n));
 
 	// f.readsome() sometimes returns 0 on a non-empty stream..
 	if (rc == 0) {

passes/memory/memory_dff.cc

@@ -164,7 +164,7 @@ struct MemoryDffWorker
 
 		if (mux_cells_a.count(sig_data) || mux_cells_b.count(sig_data))
 		{
-			bool enable_invert = mux_cells_a.count(sig_data);
+			bool enable_invert = mux_cells_a.count(sig_data) != 0;
 			Cell *mux = enable_invert ? mux_cells_a.at(sig_data) : mux_cells_b.at(sig_data);
 			SigSpec check_q = sigmap(mux->getPort(enable_invert ? "\\B" : "\\A"));
 

passes/techmap/techmap.cc

@@ -313,7 +313,7 @@ struct TechmapWorker
 
 			if (c->type == "$memrd" || c->type == "$memwr" || c->type == "$meminit") {
 				IdString memid = c->getParam("\\MEMID").decode_string();
-				log_assert(memory_renames.count(memid));
+				log_assert(memory_renames.count(memid) != 0);
 				c->setParam("\\MEMID", Const(memory_renames[memid].str()));
 			}