added more unit tests. Conversion to postfix not working

package/src/ExpressionProcessing.jl

@@ -21,8 +21,6 @@ function expr_to_postfix(expr::Expr)::PostfixType
 	postfix = PostfixType()
 	operator = get_operator(expr.args[1])
 
-	# TODO: Add suppport for single value operators like "abs(x)"
-	
 	for j in 2:length(expr.args)
 		arg = expr.args[j]
 		if typeof(arg) === Expr
@@ -35,12 +33,17 @@ function expr_to_postfix(expr::Expr)::PostfixType
 			exprElement = convert_to_ExpressionElement(convert(Float64, arg))
 			push!(postfix, exprElement)
 		end
+
 		if length(postfix) >= 2
 			exprElement = convert_to_ExpressionElement(operator)
 			push!(postfix, exprElement)
 		end
 	end
 
+	# For the case this expression has an operator that only takes in a single value like "abs(x)"
+	if length(postfix) == 1
+		push!(postfix, convert_to_ExpressionElement(operator))
+	end
 	return postfix
 end
 

package/src/Interpreter.jl

@@ -22,6 +22,12 @@ function interpret(expressions::Vector{ExpressionProcessing.PostfixType}, variab
 	# each expression has nr. of variable sets (nr. of columns of the variables) results and there are n expressions
 	cudaResults = CuArray{Float64}(undef, variableCols, length(expressions))
 
+	# println("cudaVars")
+	# println(cudaVars)
+	# println("cudaParams")
+	# println(cudaParams)
+	# println("cudaExprs")
+	# println(cudaExprs)
 	# Start kernel for each expression to ensure that no warp is working on different expressions
 	for i in eachindex(expressions)
 		kernel = @cuda launch=false interpret_expression(cudaExprs, cudaVars, cudaParams, cudaResults, cudaStepsize, i)
@@ -32,7 +38,6 @@ function interpret(expressions::Vector{ExpressionProcessing.PostfixType}, variab
 		kernel(cudaExprs, cudaVars, cudaParams, cudaResults, cudaStepsize, i; threads, blocks)
 	end
 
-	# TODO: Wait for all the kernels to finish to return the result
 	return cudaResults
 end
 
@@ -51,9 +56,9 @@ function interpret_expression(expressions::CuDeviceArray{ExpressionElement}, var
 	operationStack = MVector{MAX_STACK_SIZE, Float64}(undef) # Try to get this to function with variable size too, to allow better memory usage
 	operationStackTop = 0 # stores index of the last defined/valid value
 	
-	for setIndex in index:stride
-		firstVariableIndex = ((setIndex - 1) * stepsize[3]) # Exclusive
-	
+	for varSetIndex in index:stride
+		firstVariableIndex = ((varSetIndex - 1) * stepsize[3]) # Exclusive
+		
 		for i in firstExprIndex:lastExprIndex
 			if expressions[i].Type == EMPTY
 				break
@@ -64,14 +69,13 @@ function interpret_expression(expressions::CuDeviceArray{ExpressionElement}, var
 				if val > 0
 					operationStack[operationStackTop] = variables[firstVariableIndex + val]
 				else
-					val = abs(val)
+					val = -val
 					operationStack[operationStackTop] = parameters[firstParamIndex + val]
 				end
 			elseif expressions[i].Type == FLOAT64
 				operationStackTop += 1
 				operationStack[operationStackTop] = reinterpret(Float64, expressions[i].Value)
 			elseif expressions[i].Type == OPERATOR
-				# TODO Maybe put this in seperate function 
 				type = reinterpret(Operator, expressions[i].Value)
 				if type == ADD
 					operationStackTop -= 1
@@ -103,8 +107,8 @@ function interpret_expression(expressions::CuDeviceArray{ExpressionElement}, var
 			end
 		end
 		# "(exprIndex - 1) * variableCols" -> calculates the column in which to insert the result (expression = column)
-		# "+ setIndex" -> to get the row inside the column at which to insert the result of the variable set (variable set = row)
-		resultIndex = convert(Int, (exprIndex - 1) * variableCols + setIndex) # Inclusive
+		# "+ varSetIndex" -> to get the row inside the column at which to insert the result of the variable set (variable set = row)
+		resultIndex = convert(Int, (exprIndex - 1) * variableCols + varSetIndex) # Inclusive
 		results[resultIndex] = operationStack[operationStackTop]
 	end