added loading of variables from memory into registers. Note: Needed to leave, so code currently not compiling

package/src/Transpiler.jl

@@ -33,14 +33,14 @@ function transpile(expression::ExpressionProcessing.PostfixType)::String
 
 	# TODO: Suboptimal solution
 	signature, paramLoading = get_kernel_signature("ExpressionProcessing", [Int32, Int32, Float32]) # nrOfVarSets, nrOfVarsPerSet, Vars
-	guardClause = get_guard_clause(exitJumpLocationMarker, "%parameter0") # r0 because first entry holds the number of variables and that is always stored in %r0
+	guardClause = get_guard_clause(exitJumpLocationMarker, "%parameter0") # parameter0 because first entry holds the number of variables and that is always stored in %parameter0
 
 	println(ptxBuffer, get_cuda_header())
 	println(ptxBuffer, signature)
 	println(ptxBuffer, "{")
 
 
-	calc_code = generate_calculation_code(expression, "%parameter2")
+	calc_code = generate_calculation_code(expression, "%parameter1", "%parameter2")
 	println(ptxBuffer, get_register_definitions())
 	println(ptxBuffer, paramLoading)
 	println(ptxBuffer, guardClause)
@@ -74,9 +74,9 @@ function get_kernel_signature(kernelName::String, parameters::Vector{DataType}):
 	for i in eachindex(parameters)
 		print(signatureBuffer, "  .param .u32", " ", "param_", i)
 
-		parameterRegister = get_next_free_register!("r")
+		parameterRegister = get_next_free_register("r")
 		println(paramLoadingBuffer, "ld.param.u32   $parameterRegister, [param_$i];")
-		println(paramLoadingBuffer, "cvta.to.global.u32   $(get_next_free_register!("parameter")), $parameterRegister;")
+		println(paramLoadingBuffer, "cvta.to.global.u32   $(get_next_free_register("parameter")), $parameterRegister;")
 		if i != lastindex(parameters)
 			println(signatureBuffer, ",")
 		end
@@ -94,18 +94,18 @@ Constructs the PTX code used for handling the case where too many threads are st
 function get_guard_clause(exitJumpLocation::String, nrOfVarSetsRegister::String)::String
 	guardBuffer = IOBuffer()
 
-	threadIds = get_next_free_register!("r")
-	threadsPerCTA = get_next_free_register!("r")
-	currentThreadId = get_next_free_register!("r")
+	threadIds = get_next_free_register("r")
+	threadsPerCTA = get_next_free_register("r")
+	currentThreadId = get_next_free_register("r")
 
 	# load data into above defined registers
 	println(guardBuffer, "mov.u32    $threadIds, %ntid.x;")
 	println(guardBuffer, "mov.u32    $threadsPerCTA, %ctaid.x;")
 	println(guardBuffer, "mov.u32    $currentThreadId, %tid.x;")
 
-	globalThreadId = get_next_free_register!("r") # basically the index of the thread in the variable set
-	breakCondition = get_next_free_register!("p")
-	nrOfVarSets = get_next_free_register!("i")
+	globalThreadId = get_next_free_register("r") # basically the index of the thread in the variable set
+	breakCondition = get_next_free_register("p")
+	nrOfVarSets = get_next_free_register("i")
 	println(guardBuffer, "ld.global.u32  $nrOfVarSets, $nrOfVarSetsRegister;")
 	println(guardBuffer, "mad.lo.s32     $globalThreadId, $threadIds, $threadsPerCTA, $currentThreadId;")
 	println(guardBuffer, "setp.ge.s32    $breakCondition, $globalThreadId, $nrOfVarSets;") # guard clause = index > nrOfVariableSets
@@ -116,7 +116,7 @@ function get_guard_clause(exitJumpLocation::String, nrOfVarSetsRegister::String)
 	return String(take!(guardBuffer))
 end
 
-function generate_calculation_code(expression::ExpressionProcessing.PostfixType, variablesRegister::String)::String
+function generate_calculation_code(expression::ExpressionProcessing.PostfixType, variablesRegister::String, parameterRegister::String)::String
 	codeBuffer = IOBuffer()
 	operands = Vector{Operand}()
 
@@ -140,17 +140,19 @@ function generate_calculation_code(expression::ExpressionProcessing.PostfixType,
 			println(codeBuffer, operation)
 			push!(operands, resultRegister)
 		elseif token.Type == INDEX
-			# TODO
-			# %parameter1 + startIndex + Index * bytes
-			# startIndex: should be calculateable by global threadId and size of variables
-			# startIndex: threadId (==var-set/param) * size of var/params
 			if token.Value > 0 # varaibles
-				var, first_access = get_register_for_name!("x$(token.Value)")
-				#TODO: if first_access is true -> generate code for loading from global to local memory
-				push!(operands, "[$variablesRegister+$(token.Value*sizeof(token.Value))]") # missing: startIndex
+				var, first_access = get_register_for_name("x$(token.Value)")
+				if first_access
+					println(codeBuffer, load_into_register(var, variablesRegister, token.Value, , ))
+				end
+				push!(operands, var)
 			else
-				param, first_access = get_register_for_name!("x$(token.Value)")
-				#TODO: if first_access is true -> generate code for loading from global to local memory
+				absVal = abs(token.Value)
+				param, first_access = get_register_for_name("p$absVal")
+				if first_access
+					println(codeBuffer, load_into_register(param, parameterRegister, absVal, , ))
+				end
+				push!(operands, param)
 			end
 		end
 	end
@@ -158,6 +160,23 @@ function generate_calculation_code(expression::ExpressionProcessing.PostfixType,
 	return String(take!(codeBuffer))
 end
 
+"
+- param ```register```: The register where the loaded value will be stored
+- param ```load_location```: The location from where to load the value
+- param ```value_index```: 0-based index of the value in the variable set/parameter set
+- param ```set_index```: 0-based index of the set. Needed to calculate the actual index from the ```value_index```. Is equal to the global threadId
+- param ```set_size```: The size of one set. Needed to calculate the actual index from the ```value_index```
+"
+function load_into_register(register::String, load_location::String, value_index::Integer, set_index::Integer, set_size::Integer)::String
+	# load_location + startIndex + value_index * bytes (4 in our case)
+	# startIndex: set_index * set_size
+	if value_index == 0 && set_index == 0 # accessing the very first value doesn't need any further calculations
+		return "ld.global.f32 $register, [$load_location]"
+	else
+		return "ld.global.f32 $register, [$load_location+$(set_size*set_index + value_index*sizeof(value_index))]"
+	end
+end
+
 function type_to_ptx_type(type::DataType)::String
 	if type == Int64
 		return ".s64"
@@ -213,7 +232,7 @@ function get_operation(operator::Operator, left::Operand, right::Union{Operand,
 end
 
 let registers = Dict() # stores the count of the register already used.
-	global get_next_free_register!
+	global get_next_free_register
 	global get_register_definitions
 
 	# By convention these names correspond to the following types:
@@ -221,7 +240,7 @@ let registers = Dict() # stores the count of the register already used.
 	# - f -> float32
 	# - r -> 32 bit
 	# - var -> float32 (used for variables and params)
-	function get_next_free_register!(name::String)::String
+	function get_next_free_register(name::String)::String
 		if haskey(registers, name)
 			registers[name] += 1
 		else
@@ -261,10 +280,10 @@ let registers = Dict() # stores the count of the register already used.
 end
 
 let symtable = Dict()
-	global get_register_for_name!
+	global get_register_for_name
 
 	"Returns the register for this variable/parameter and true if it is used for the first time and false otherwise."
-	function get_register_for_name!(varName::String)
+	function get_register_for_name(varName::String)
 		if haskey(symtable, varName)
 			return (symtable[varName], false)
 		else