Fix float-conversion warning, bug1229.

Changes

@@ -35,6 +35,8 @@ The contributors that suggested a given feature are shown in []. Thanks!
 
 ****  Fix -E duplicating output, bug1226. [Odd Magne Reitan]
 
+****  Fix float-conversion warning, bug1229. [Robert Henry]
+
 
 * Verilator 3.912 2017-09-23
 

configure.ac

@@ -183,6 +183,7 @@ AC_SUBST(CFG_CXXFLAGS_STD_OLDEST)
 # Flags for compiling Verilator internals including parser, and Verilated files
 # These turn on extra warnings and are only used with 'configure --enable-ccwarn'
 _MY_CXX_CHECK_OPT(CFG_CXXFLAGS_WEXTRA,-Wextra)
+_MY_CXX_CHECK_OPT(CFG_CXXFLAGS_WEXTRA,-Wfloat-conversion)
 _MY_CXX_CHECK_OPT(CFG_CXXFLAGS_WEXTRA,-Wlogical-op)
 AC_SUBST(CFG_CXXFLAGS_WEXTRA)
 

include/verilated.cpp

@@ -817,7 +817,7 @@ void _VL_VINT_TO_STRING(int obits, char* destoutp, WDataInP sourcep) {
 
 void _VL_STRING_TO_VINT(int obits, void* destp, size_t srclen, const char* srcp) {
     // Convert C string to Verilog format
-    int bytes = VL_BYTES_I(obits);
+    size_t bytes = VL_BYTES_I(obits);
     char* op = reinterpret_cast<char*>(destp);
     if (srclen > bytes) srclen = bytes;  // Don't overflow destination
     size_t i;

include/verilated_vcd_c.cpp

@@ -354,7 +354,7 @@ void VerilatedVcd::set_time_resolution (const char* unitp) {
 double VerilatedVcd::timescaleToDouble (const char* unitp) {
     char* endp;
     double value = strtod(unitp, &endp);
-    if (!value) value=1;  // On error so we allow just "ns" to return 1e-9.
+    if (value==0.0 && endp==unitp) value=1;  // On error so we allow just "ns" to return 1e-9.
     unitp=endp;
     while (*unitp && isspace(*unitp)) unitp++;
     switch (*unitp) {

src/V3Graph.cpp

@@ -121,7 +121,7 @@ uint32_t V3GraphVertex::outHash() const {
 ostream& operator<<(ostream& os, V3GraphVertex* vertexp) {
     os<<"  VERTEX="<<vertexp->name();
     if (vertexp->rank()) os<<" r"<<vertexp->rank();
-    if (vertexp->fanout()) os<<" f"<<vertexp->fanout();
+    if (vertexp->fanout()!=0.0) os<<" f"<<vertexp->fanout();
     if (vertexp->color()) os<<" c"<<vertexp->color();
     return os;
 }
@@ -327,7 +327,7 @@ void V3Graph::dumpDotFile(const string& filename, bool colorAsSubgraph) {
 	     <<"\t[fontsize=8 "
 	     <<"label=\""<<(vertexp->name()!="" ? vertexp->name() : "\\N");
 	if (vertexp->rank()) *logp<<" r"<<vertexp->rank();
-	if (vertexp->fanout()) *logp<<" f"<<vertexp->fanout();
+	if (vertexp->fanout()!=0.0) *logp<<" f"<<vertexp->fanout();
 	if (vertexp->color()) *logp<<"\\n c"<<vertexp->color();
 	*logp<<"\"";
 	*logp<<", color="<<vertexp->dotColor();

src/V3Order.cpp

@@ -1015,7 +1015,8 @@ public:
     virtual ~OrderVisitor() {
 	// Stats
 	for (int type=0; type<OrderVEdgeType::_ENUM_END; type++) {
-	    if (double count = double(m_statCut[type])) {
+	    double count = double(m_statCut[type]);
+	    if (count != 0.0) {
 		V3Stats::addStat(string("Order, cut, ")+OrderVEdgeType(type).ascii(), count);
 	    }
 	}

src/V3Stats.cpp

@@ -217,11 +217,12 @@ public:
 	V3Stats::addStat(m_stage, "Vars, unpacked arrayed", m_statVarArray);
 	V3Stats::addStat(m_stage, "Vars, clock attribute", m_statVarClock);
 	V3Stats::addStat(m_stage, "Var space, non-arrays, bytes", m_statVarBytes);
-	if (m_statVarScpBytes) {
+	if (m_statVarScpBytes!=0.0) {
 	    V3Stats::addStat(m_stage, "Var space, scoped, bytes", m_statVarScpBytes);
 	}
 	for (unsigned i=0; i<m_statVarWidths.size(); i++) {
-	    if (double count = double(m_statVarWidths.at(i))) {
+	    double count = double(m_statVarWidths.at(i));
+	    if (count != 0.0) {
 		if (v3Global.opt.statsVars()) {
 		    NameMap& nameMapr = m_statVarWidthNames.at(i);
 		    for (NameMap::iterator it=nameMapr.begin(); it!=nameMapr.end(); ++it) {
@@ -236,20 +237,23 @@ public:
 	}
 	// Node types
 	for (int type=0; type<AstType::_ENUM_END; type++) {
-	    if (double count = double(m_statTypeCount.at(type))) {
+	    double count = double(m_statTypeCount.at(type));
+	    if (count != 0.0) {
 		V3Stats::addStat(m_stage, string("Node count, ")+AstType(type).ascii(), count);
 	    }
 	}
 	for (int type=0; type<AstType::_ENUM_END; type++) {
 	    for (int type2=0; type2<AstType::_ENUM_END; type2++) {
-		if (double count = double(m_statAbove[type][type2])) {
+		double count = double(m_statAbove[type][type2]);
+		if (count != 0.0) {
 		    V3Stats::addStat(m_stage, string("Node pairs, ")+AstType(type).ascii()+"_"+AstType(type2).ascii(), count);
 		}
 	    }
 	}
 	// Branch pred
 	for (int type=0; type<AstBranchPred::_ENUM_END; type++) {
-	    if (double count = double(m_statPred[type])) {
+	    double count = double(m_statPred[type]);
+	    if (count != 0.0) {
 		V3Stats::addStat(m_stage, string("Branch prediction, ")+AstBranchPred(type).ascii(), count);
 	    }
 	}

src/VlcTest.h

@@ -74,7 +74,7 @@ public:
 	cout<<"  Covered,     Rank,  RankPts,  Filename"<<endl;
     }
     void dump(bool bucketsToo) {
-	if (testrun() || computrons()) {
+	if (testrun() || computrons()!=0.0) {
 	    cout<<"  "<<setw(8)<<setfill('0')<<testrun()
 		<<",  "<<setw(7)<<setfill(' ')<<computrons()<<",";
 	}

test_regress/t/t_dpi_import_c.cpp

@@ -104,7 +104,7 @@ long long	dpii_f_longint (long long i)	{ return ~i; }
 void*		dpii_f_chandle (void* i)	{ return i; }
 const char*	dpii_f_string  (const char* i)	{ return i; }
 double		dpii_f_real    (double i)	{ return i+1.5; }
-float		dpii_f_shortreal(float i)	{ return i+1.5; }
+float		dpii_f_shortreal(float i)	{ return i+1.5f; }
 
 void dpii_v_bit	(unsigned char i, unsigned char *o)	{ *o = VL_MASK_I(1) & ~i; }
 void dpii_v_int (int i, int *o)				{ *o = ~i; }
@@ -117,7 +117,7 @@ void dpii_v_ulong (unsigned long long i, unsigned long long *o)	{ *o = ~i; }
 void dpii_v_chandle (void* i, void* *o)			{ *o = i; }
 void dpii_v_string   (const char* i, const char** o)	{ *o = i; }
 void dpii_v_real     (double i,      double* o)		{ *o = i + 1.5; }
-void dpii_v_shortreal(float i,       float* o)		{ *o = i + 1.5; }
+void dpii_v_shortreal(float i,       float* o)		{ *o = i + 1.5f; }
 
 void dpii_v_struct (const svBitVecVal* i, svBitVecVal* o) {
     o[0] = ~i[0];