implemented 20 more Z80 instructions

tools/generate_z80_tables.cc

@@ -10,6 +10,22 @@
 #include <fstream>
 #include <iomanip>
 
+//
+// Constants
+//
+
+static const uint8_t Z80_SF = 0x80; // sign 
+static const uint8_t Z80_ZF = 0x40; // zero
+static const uint8_t Z80_YF = 0x20; // bit 5 result
+static const uint8_t Z80_HF = 0x10; // half carry
+static const uint8_t Z80_XF = 0x08; // bit 3 result
+static const uint8_t Z80_PF = 0x04; // parity
+static const uint8_t Z80_VF = 0x04; // overflow
+static const uint8_t Z80_NF = 0x02; // add/subtract
+static const uint8_t Z80_CF = 0x01; // carry
+
+
+
 //
 // Command line settings
 //
@@ -59,7 +75,7 @@ void parseCommandLine(int argc, char **argv)
 
 std::string generateParityTable(void)
 {
-	std::string outStr = "!macro PUT_Z80_TABLE_PARITY {\n";;
+	std::string outStr = "!macro PUT_Z80_FTABLE_PARITY {\n";
 
 	for (uint16_t idx = 0; idx < 0x100; idx++)
 	{
@@ -89,7 +105,51 @@ std::string generateParityTable(void)
 		}
 	}
 
-	return outStr + "}\n\n\n";;
+	return outStr + "}\n\n\n";
+} 
+
+std::string generateIncTable(void)
+{
+	std::stringstream outStr;
+
+	outStr << "!macro PUT_Z80_FTABLE_INC {\n";
+
+	for (uint16_t idx = 0; idx < 0x100; idx++)
+	{
+		uint8_t flags = 0;
+
+		if (idx >= 0x7F && idx != 0xFF) flags |= Z80_SF; // for negative result
+		if (idx == 0xFF)                flags |= Z80_ZF; // for result equal 0
+		if ((idx & 0x0F) == 0x0F)       flags |= Z80_HF;
+		if (idx == 0x7F)                flags |= Z80_VF;
+
+		outStr << "\t!byte ";
+		outStr << std::hex << std::setw(2) << int(flags) << "\n";
+	}
+
+	return outStr.str() + "}\n\n\n";
+}
+
+std::string generateDecTable(void)
+{
+	std::stringstream outStr;
+
+	outStr << "!macro PUT_Z80_FTABLE_DEC {\n";
+
+	for (uint16_t idx = 0; idx < 0x100; idx++)
+	{
+		uint8_t flags = Z80_NF;
+
+		if (idx >= 0x81 || idx == 0x00) flags |= Z80_SF; // for negative result
+		if (idx == 0x01)                flags |= Z80_ZF; // for result equal 0
+		if ((idx & 0x0F) == 0x00)       flags |= Z80_HF;
+		if (idx == 0x80)                flags |= Z80_VF;
+
+		outStr << "\t!byte ";
+		outStr << std::hex << std::setw(2) << int(flags) << "\n";
+	}
+
+	return outStr.str() + "}\n\n\n";
 } 
 
 std::string generateDaaTables()
@@ -122,6 +182,8 @@ void writeTables()
     // Write tables
 
 	outFile << generateParityTable();
+	outFile << generateIncTable();
+	outFile << generateDecTable();
 	outFile << generateDaaTables();
 
 	// XXX