Testing new vm/language WIP

1 files changed, 271 insertions, 0 deletions

diff --git a/src/pim/Machine.cpp b/src/pim/Machine.cpp
new file mode 100644
index 0000000..4c07514
--- /dev/null
+++ b/src/pim/Machine.cpp
@@ -0,0 +1,271 @@
+//Virtual machine
+
+#include <iostream>
+#include "Machine.h"
+#include "Opcodes.h"
+#include "simulation/Simulation.h"
+namespace pim
+{
+	/*unsigned char * rom;
+	int romSize;
+	int romMask;
+
+	unsigned char * ram;
+	int ramSize;
+	int ramMask;
+
+	int programStack;
+	int callStack;*/
+
+	VirtualMachine::VirtualMachine(Simulation * simulation) :
+		rom(NULL),
+		ram(NULL),
+		sim(simulation)
+	{
+
+	}
+
+	void VirtualMachine::LoadProgram(std::vector<unsigned char> programData)
+	{
+		int lastBit = 0;
+
+		romSize = programData.size();
+
+		for (lastBit = 0; romSize > (1 << lastBit); lastBit++ ) { }
+		romSize = 1 << lastBit;
+		romMask = romSize - 1;
+
+		rom = new Instruction[romSize];
+
+		int programPosition = 0;
+		int pc = 0;
+		while(programPosition < programData.size())
+		{
+			int argSize = 0;
+			Instruction instruction;
+			instruction.Opcode = programData[programPosition++];
+			if(argSize = OpcodeArgSize(instruction.Opcode))
+			{
+				if(argSize == 4)
+				{
+					int tempInt = 0;
+					tempInt |= programData[programPosition];
+					tempInt |= programData[programPosition+1] << 8;
+					tempInt |= programData[programPosition+2] << 16;
+					tempInt |= programData[programPosition+3] << 24;
+
+
+					std::cout << "Got integer " << tempInt << std::endl;
+					//std::cout << "Got byte " << (int)(programData[programPosition]) << std::endl;
+					//std::cout << "Got byte " << (int)(programData[programPosition+1]) << std::endl;
+					//std::cout << "Got byte " << (int)(programData[programPosition+2]) << std::endl;
+					//std::cout << "Got byte " << (int)(programData[programPosition+3]) << std::endl;
+
+					//*(int*)&rom[programPosition] = tempInt;
+					instruction.Parameter.Integer = tempInt;
+
+					programPosition += 4; 
+				}
+			}
+			else
+			{
+				instruction.Parameter.Integer = 0;
+			}
+			rom[pc++] = instruction;
+		}
+		romSize = pc;
+		//std::copy(programData.begin(), programData.end(), rom);
+
+
+		ramSize = 1024;
+		ramMask = ramSize - 1;
+
+		ram = new unsigned char[ramSize];
+		programStack = ramSize-1;
+		callStack = ramSize-260;
+
+		framePointer = callStack;
+		callStack += WORDSIZE;	//Since there's nothing on the stack, it shouldn't point to the item on the bottom
+	}
+
+	int VirtualMachine::OpcodeArgSize(int opcode)
+	{
+		switch(opcode)
+		{
+		case Opcode::Load:
+		case Opcode::Store:
+		case Opcode::Constant:
+		case Opcode::Increment:
+		case Opcode::JumpEqual:
+		case Opcode::JumpNotEqual:
+		case Opcode::JumpGreater:
+		case Opcode::JumpGreaterEqual:
+		case Opcode::JumpLess:
+		case Opcode::JumpLessEqual:
+		case Opcode::Jump:
+		case Opcode::Return:
+		case Opcode::LocalEnter:
+			return 4;
+		case Opcode::Discard:
+		case Opcode::Duplicate:
+		case Opcode::Add:
+		case Opcode::Subtract:
+		case Opcode::Multiply:
+		case Opcode::Divide:
+		case Opcode::Modulus:
+		case Opcode::Negate:
+		case Opcode::Create:
+		case Opcode::Transform:
+		case Opcode::Get:
+		case Opcode::Position:
+		case Opcode::Kill:
+			return 0;
+		}
+	}
+
+	void VirtualMachine::Run()
+	{
+		//std::cout << "CS: " << callStack << " PS: " << programStack << std::endl;
+		//std::string names[] = { "Load", "Store", "Constant", "Increment", "Discard", "Duplicate", "Add", "Subtract", "Multiply", "Divide", "Modulus", "Negate", "Create", "Transform", "Get", "Position", "Kill", "JumpEqual", "JumpNotEqual", "JumpGreater", "JumpGreaterEqual", "JumpLess", "JumpLessEqual", "Jump", "Return", "LocalEnter"};
+
+		Word temp1;
+		Word temp2;
+		Word temp3;
+		Word temp4;
+		int temp;
+		while(programCounter < romSize)
+		{
+			Word argument = rom[programCounter].Parameter;
+			//std::cerr << programCounter << "\t" << names[rom[programCounter].Opcode] << "\t" << argument.Integer << std::endl;//"\t";
+			switch(rom[programCounter].Opcode)
+			{
+			case Opcode::Load:
+				PSPush(CSA(argument.Integer));
+				break;
+			case Opcode::Store:
+				CSA(argument.Integer) = PSPop();
+				break;
+			case Opcode::Constant:
+				PSPush(argument);
+				break;
+			case Opcode::Increment:
+				PS().Integer += argument.Integer;
+				break;
+			case Opcode::Discard:
+				programStack += WORDSIZE;
+				break;
+			case Opcode::Duplicate:
+				PSPush(PS());
+				break;
+			case Opcode::Add:
+				PSPush(PSPop().Integer + PSPop().Integer);
+				break;
+			case Opcode::Subtract:
+				temp1 = PSPop();
+				PSPush(PSPop().Integer - temp1.Integer);
+				break;
+			case Opcode::Multiply:
+				PSPush(PSPop().Integer * PSPop().Integer);
+				break;
+			case Opcode::Divide:
+				temp1 = PSPop();
+				PSPush(PSPop().Integer / temp1.Integer);
+				break;
+			case Opcode::Modulus:
+				temp1 = PSPop();
+				PSPush(PSPop().Integer % temp1.Integer);
+				break;
+			case Opcode::Negate:
+				PS().Integer = -PS().Integer;
+				break;
+			case Opcode::Create:
+				temp1 = PSPop();
+				temp2 = PSPop();
+				temp3 = PSPop();
+				PSPush(sim->create_part(PSPop().Integer, temp3.Integer, temp2.Integer, temp1.Integer));
+				break;
+			case Opcode::Transform:
+				PSPop();
+				PSPop();
+				PSPush((Word)-1);
+				break;
+			case Opcode::Get:
+				temp1 = PSPop();
+				temp2 = PSPop();
+				if(temp1.Integer < 0 || temp1.Integer >= YRES || temp2.Integer < 0 || temp2.Integer >= XRES || !(temp = sim->pmap[temp1.Integer][temp2.Integer]))
+				{
+					PSPush(-1);
+					break;
+				}
+				PSPush(temp>>8);
+				break;
+			case Opcode::Position:
+				temp1 = PSPop();
+				if(temp1.Integer < 0 || temp1.Integer >= NPART || !sim->parts[temp1.Integer].type)
+				{
+					PSPush(-1);
+					PSPush(-1);
+					break;
+				}
+				PSPush((int)sim->parts[temp1.Integer].x);
+				PSPush((int)sim->parts[temp1.Integer].y);
+				break;
+			case Opcode::Kill:
+				sim->kill_part(PSPop().Integer);
+				PSPush((Word)0);
+				break;
+			case Opcode::JumpEqual:
+				if(PSPop().Integer == PSPop().Integer)
+					programCounter = argument.Integer-1;
+				break;
+			case Opcode::JumpNotEqual:
+				if(PSPop().Integer != PSPop().Integer)
+					programCounter = argument.Integer-1;
+				break;
+			case Opcode::JumpGreater:
+				temp1 = PSPop();
+				if(PSPop().Integer > temp1.Integer)
+					programCounter = argument.Integer-1;
+				break;
+			case Opcode::JumpGreaterEqual:
+				temp1 = PSPop();
+				if(PSPop().Integer >= temp1.Integer)
+					programCounter = argument.Integer-1;
+				break;
+			case Opcode::JumpLess:
+				temp1 = PSPop();
+				if(PSPop().Integer < temp1.Integer)
+					programCounter = argument.Integer-1;
+				break;
+			case Opcode::JumpLessEqual:
+				temp1 = PSPop();
+				if(PSPop().Integer <= temp1.Integer)
+					programCounter = argument.Integer-1;
+				break;
+			case Opcode::Jump:
+				programCounter = argument.Integer-1;
+				break;
+			case Opcode::Return:
+				callStack += argument.Integer;
+				break;
+			case Opcode::LocalEnter:
+				callStack -= argument.Integer;
+				break;
+			}
+			//std::cout << programStack << std::endl;
+			programCounter++;
+		}
+		//std::cout << "CS: " << callStack << " PS: " << programStack << std::endl;
+	}
+
+	void VirtualMachine::Call(std::string entryPoint)
+	{
+
+	}
+
+	void VirtualMachine::Call(int entryPoint)
+	{
+		programCounter = entryPoint;
+		Run();
+	}
+}
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