IOBus execution test + Fixed IOBus/Membus readcell

lua/wire/zvm/tests/execute_from_iobus.lua

@@ -0,0 +1,55 @@
+CPUTest = {}
+
+function CPUTest:RunTest(VM,TestSuite)
+	CPUTest.VM = VM
+	CPUTest.TestSuite = TestSuite
+	TestSuite.Compile("MOV R0,6 ADD R0,R0 MUL R0,2",nil,CPUTest.CompileNext,CPUTest.CompileError)
+	-- end result of the above code should be R0 = 24
+end
+
+function CPUTest.CompileNext()
+	local buff = CPUTest.TestSuite.GetCompileBuffer()
+	local IOBus = CPUTest.TestSuite.CreateVirtualIOBus(#buff+1) -- create an IOBus large enough to hold this code
+	PrintTable(buff)
+	CPUTest.IOBus = IOBus
+	-- reverse the compiled code, the CPU will read them in reverse if it's in the IOBus
+	-- because CS will be negative, and IP only increments
+	-- ipairs won't index 0 and the cpu compile buffer uses 0
+	for i=0,#buff do
+		IOBus.InPorts[#buff-i] = buff[i]
+	end
+	IOBus.OldReadCell = IOBus.ReadCell
+	IOBus.AccessLog = {}
+	function IOBus:ReadCell(address)
+		IOBus.AccessLog[#IOBus.AccessLog+1] = {"read address"..tostring(address),self:OldReadCell(address) or "no value"}
+		return self:OldReadCell(address)
+	end
+	-- JMPF jumps to 0 IP, CS = (code length+1)*-1 because first index of IOBus is "cell -1" of extern read/write
+	local generatedcode = "CMP R0,0 JNER -3 JMPF 0,"..(#buff+1)*-1
+	print(generatedcode)
+	CPUTest.TestSuite.Compile(generatedcode,nil,CPUTest.RunCPU,CPUTest.CompileError)
+end
+
+function CPUTest.RunCPU()
+	CPUTest.TestSuite.FlashData(CPUTest.VM,CPUTest.TestSuite.GetCompileBuffer()) -- upload compiled to virtual cpu
+	CPUTest.TestSuite.Initialize(CPUTest.VM,nil,CPUTest.IOBus) -- reinitialize the CPU with the IOBus
+	CPUTest.VM.Clk = 1
+	for i=0,32 do
+		CPUTest.VM:RunStep()
+	end
+
+	-- False = no error, True = error
+	if CPUTest.VM.R0 == 24 then
+		CPUTest.TestSuite.FinishTest(false)
+	else
+		PrintTable(CPUTest.IOBus)
+		print("R0 != 24, R0 = "..tostring(CPUTest.VM.R0))
+		CPUTest.TestSuite.FinishTest(true)
+	end
+end
+
+function CPUTest.CompileError()
+	print('hit a compile time error')
+	CPUTest.TestSuite.FinishTest(true)
+end
+

lua/wire/zvm/zvm_tests.lua

@@ -62,6 +62,23 @@ function ZVMTestSuite.RunNextTest()
 end
 
 function ZVMTestSuite.Compile(SourceCode,FileName,SuccessCallback,ErrorCallback,TargetPlatform)
+	ZVMTestSuite.CompileArgs = {
+		SourceCode = SourceCode,
+		FileName = FileName,
+		SuccessCallback = SuccessCallback,
+		ErrorCallback = ErrorCallback,
+		TargetPlatform = TargetPlatform
+	}
+	-- Needs to delay next compile otherwise it'll halt, this will make it easier.
+	timer.Simple(0.125,ZVMTestSuite.StartCompileInternal)
+end
+
+function ZVMTestSuite.StartCompileInternal()
+	local SourceCode = ZVMTestSuite.CompileArgs.SourceCode
+	local FileName = ZVMTestSuite.CompileArgs.FileName
+	local SuccessCallback = ZVMTestSuite.CompileArgs.SuccessCallback
+	local ErrorCallback = ZVMTestSuite.CompileArgs.ErrorCallback
+	local TargetPlatform = ZVMTestSuite.CompileArgs.TargetPlatform
 	CPULib.Compile(SourceCode,FileName,SuccessCallback,ErrorCallback,TargetPlatform)
 end
 
@@ -72,12 +89,12 @@ end
 function ZVMTestSuite.CreateVirtualMemBus(MembusSize)
 	local virtualMemBus = {Size = MembusSize}
 	function virtualMemBus:ReadCell(Address)
-		if Address < self.Size and Address > -1 then
+		if Address <= self.Size and Address > -1 then
 			return virtualMemBus[Address]
 		end
 	end
 	function virtualMemBus:WriteCell(Address,Value)
-		if Address < self.Size and Address > -1 then
+		if Address <= self.Size and Address > -1 then
 			virtualMemBus[Address] = Value
 			return true
 		end
@@ -87,14 +104,14 @@ function ZVMTestSuite.CreateVirtualMemBus(MembusSize)
 end
 
 function ZVMTestSuite.CreateVirtualIOBus(IOBusSize)
-	local virtualIOBus = {InPorts = {},OutPorts = {}, Size = IOBusSize}
+	local virtualIOBus = {InPorts = {},OutPorts = {}, Size = IOBusSize-1}
 	function virtualIOBus:ReadCell(Address)
-		if Address < self.Size and Address > -1 then
+		if Address <= self.Size and Address > -1 then
 			return self.InPorts[Address]
 		end
 	end
 	function virtualIOBus:WriteCell(Address,Value)
-		if Address < self.Size and Address > -1 then
+		if Address <= self.Size and Address > -1 then
 			self.OutPorts[Address] = Value
 			return true
 		end