Add left and right bound properties to wire. Add test. Fix printing

for signed attributes

Co-authored-by: N. Engelhardt <nak@yosyshq.com>
Co-authored-by: Roland Coeurjoly <rolandcoeurjoly@gmail.com>

frontends/verific/verific.cc

@@ -450,6 +450,19 @@ void VerificImporter::import_attributes(dict<RTLIL::IdString, RTLIL::Const> &att
 		auto type_range = nl->GetTypeRange(obj->Name());
 		if (!type_range)
 			return;
+		if (type_range->IsTypeScalar()) {
+			const long long bottom_bound = type_range->GetScalarRangeLeftBound();
+			const long long top_bound = type_range->GetScalarRangeRightBound();
+			const unsigned bit_width = type_range->NumElements();
+			RTLIL::Const bottom_const(bottom_bound, bit_width);
+			RTLIL::Const top_const(top_bound, bit_width);
+			if (bottom_bound < 0 || top_bound < 0) {
+				bottom_const.flags |= RTLIL::CONST_FLAG_SIGNED;
+				top_const.flags |= RTLIL::CONST_FLAG_SIGNED;
+			}
+			attributes.emplace(ID(bottom_bound), bottom_const);
+			attributes.emplace(ID(top_bound), top_const);
+		}
 		if (!type_range->IsTypeEnum())
 			return;
 #ifdef VERIFIC_VHDL_SUPPORT

kernel/rtlil.cc

@@ -213,7 +213,7 @@ RTLIL::Const::Const(const std::string &str)
 	}
 }
 
-RTLIL::Const::Const(int val, int width)
+RTLIL::Const::Const(long long val, int width)
 {
 	flags = RTLIL::CONST_FLAG_NONE;
 	bits.reserve(width);

kernel/rtlil.h

@@ -662,7 +662,7 @@ struct RTLIL::Const
 
 	Const() : flags(RTLIL::CONST_FLAG_NONE) {}
 	Const(const std::string &str);
-	Const(int val, int width = 32);
+	Const(long long val, int width = 32);
 	Const(RTLIL::State bit, int width = 1);
 	Const(const std::vector<RTLIL::State> &bits) : bits(bits) { flags = CONST_FLAG_NONE; }
 	Const(const std::vector<bool> &bits);

passes/cmds/printattrs.cc

@@ -42,7 +42,7 @@ struct PrintAttrsPass : public Pass {
 	static void log_const(const RTLIL::IdString &s, const RTLIL::Const &x, const unsigned int indent) {
 		if (x.flags == RTLIL::CONST_FLAG_STRING)
 			log("%s(* %s=\"%s\" *)\n", get_indent_str(indent).c_str(), log_id(s), x.decode_string().c_str());
-		else if (x.flags == RTLIL::CONST_FLAG_NONE)
+		else if (x.flags == RTLIL::CONST_FLAG_NONE || x.flags == RTLIL::CONST_FLAG_SIGNED)
 			log("%s(* %s=%s *)\n", get_indent_str(indent).c_str(), log_id(s), x.as_string().c_str());
 		else
 			log_assert(x.flags == RTLIL::CONST_FLAG_STRING || x.flags == RTLIL::CONST_FLAG_NONE); //intended to fail

tests/verific/bounds.vhd

@@ -0,0 +1,18 @@
+library IEEE;
+use IEEE.STD_LOGIC_1164.ALL;
+use IEEE.NUMERIC_STD.ALL;
+
+entity work is
+    Port (
+        a : in INTEGER range -5 to 10;
+        b : out INTEGER range -6 to 11
+    );
+end entity work;
+
+architecture Behavioral of work is
+begin
+    process(a)
+    begin
+        b <= a;
+    end process;
+end architecture Behavioral;

tests/verific/bounds.ys

@@ -0,0 +1,6 @@
+read -vhdl bounds.vhd
+verific -import work
+select -assert-count 1 a:bottom_bound=5'bs11011
+select -assert-count 1 a:top_bound=5'bs01010
+select -assert-count 1 a:bottom_bound=5'bs11010
+select -assert-count 1 a:top_bound=5'bs01011