finished interpreter. still need to test it

package/src/Interpreter.jl

@@ -11,7 +11,7 @@ export interpret
  - variables::Matrix{Float64} : The variables to use. Each column is mapped to the variables x1..xn
  - parameters::Vector{Vector{Float64}} : The parameters to use. Each Vector contains the values for the parameters p1..pn. The number of parameters can be different for every expression
 "
-function interpret(expressions::Vector{ExpressionProcessing.PostfixType}, variables::Matrix{Float64}, parameters::Vector{Vector{Float64}})
+function interpret(expressions::Vector{ExpressionProcessing.PostfixType}, variables::Matrix{Float64}, parameters::Vector{Vector{Float64}})::Matrix{Float64}
 	variableCols = size(variables, 2) # number of sets of variables to use for each expression
 	cudaVars = CuArray(variables)
 	cudaParams = create_cuda_array(parameters, NaN64) # column corresponds to data for one expression
@@ -31,75 +31,87 @@ 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
+	println(cudaResults)
+	return cudaResults
 end
 
+#TODO: Add @inbounds to all indexing after it is verified that all works https://cuda.juliagpu.org/stable/development/kernel/#Bounds-checking
 const MAX_STACK_SIZE = 25 # The max number of values the expression can have. so Constant values, Variables and parameters
 function interpret_expression(expressions::CuDeviceArray{ExpressionElement}, variables::CuDeviceArray{Float64}, parameters::CuDeviceArray{Float64}, results::CuDeviceArray{Float64}, stepsize::CuDeviceArray{Int}, exprIndex::Int)
+	index = (blockIdx().x - 1) * blockDim().x + threadIdx().x
+	stride = gridDim().x * blockDim().x
+	
 	firstExprIndex = ((exprIndex - 1) * stepsize[1]) + 1 # Inclusive
 	lastExprIndex = firstExprIndex + stepsize[1] - 1 # Inclusive
 	firstParamIndex = ((exprIndex - 1) * stepsize[2]) # Exclusive
 	# lastParamIndex = firstParamIndex + stepsize[2] - 1 # Inclusive (probably not needed)
-	
 	variableCols = length(variables) / stepsize[3]
-	firstVariableIndex = ((exprIndex - 1) * stepsize[3]) # Exclusive # TODO: This is obviously not right because each expression calculates the cudaResults for each variable set and therefore needs to incorporate the block index + stride. This is only done for testing
-	firstResultsIndex = ((exprIndex - 1) * variableCols) + 1 # Inclusive # TODO: Same as above. to get the index of the variable set and therefore the index in the results matrix, use the block index and stride
 
 	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
 	
-	# TODO: Look into Index and stride for the case that one thread handles multiple "variable sets"
-	return
+	# return
 
-	for i in firstExprIndex:lastExprIndex
-		if expressions[i].Type == EMPTY
-			break
-		elseif expressions[i].Type == INDEX
-			val = expressions[i].Value
-			operationStackTop += 1
+	for setIndex in index:stride
+		firstVariableIndex = ((setIndex - 1) * stepsize[3]) # Exclusive
+	
+		for i in firstExprIndex:lastExprIndex
+			if expressions[i].Type == EMPTY
+				break
+			elseif expressions[i].Type == INDEX
+				val = expressions[i].Value
+				operationStackTop += 1
 
-			if val > 0
-				operationStack[operationStackTop] = variables[firstVariableIndex + val]
+				if val > 0
+					operationStack[operationStackTop] = variables[firstVariableIndex + val]
+				else
+					val = abs(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 = expressions[i].Type
+				if type == ADD
+					operationStackTop -= 1
+					operationStack[operationStackTop] = operationStack[operationStackTop] + operationStack[operationStackTop + 1]
+				elseif type == SUBTRACT
+					operationStackTop -= 1
+					operationStack[operationStackTop] = operationStack[operationStackTop] - operationStack[operationStackTop + 1]
+				elseif type == MULTIPLY
+					operationStackTop -= 1
+					operationStack[operationStackTop] = operationStack[operationStackTop] * operationStack[operationStackTop + 1]
+				elseif type == DIVIDE
+					operationStackTop -= 1
+					operationStack[operationStackTop] = operationStack[operationStackTop] / operationStack[operationStackTop + 1]
+				elseif type == POWER
+					operationStackTop -= 1
+					operationStack[operationStackTop] = operationStack[operationStackTop] ^ operationStack[operationStackTop + 1]
+				elseif type == ABS
+					operationStack[operationStackTop] = abs(operationStack[operationStackTop])
+				elseif type == LOG
+					operationStack[operationStackTop] = log(operationStack[operationStackTop])
+				elseif type == EXP
+					operationStack[operationStackTop] = exp(operationStack[operationStackTop])
+				elseif type == SQRT
+					operationStack[operationStackTop] = sqrt(operationStack[operationStackTop])
+				end
 			else
-				val = abs(val)
-				operationStack[operationStackTop] = parameters[firstParamIndex + val]
+				operationStack[operationStackTop] = NaN
+				break
 			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 = expressions[i].Type
-			if type == ADD
-				operationStackTop -= 1
-				operationStack[operationStackTop] = operationStack[operationStackTop] + operationStack[operationStackTop + 1]
-			elseif type == SUBTRACT
-				operationStackTop -= 1
-				operationStack[operationStackTop] = operationStack[operationStackTop] - operationStack[operationStackTop + 1]
-			elseif type == MULTIPLY
-				operationStackTop -= 1
-				operationStack[operationStackTop] = operationStack[operationStackTop] * operationStack[operationStackTop + 1]
-			elseif type == DIVIDE
-				operationStackTop -= 1
-				operationStack[operationStackTop] = operationStack[operationStackTop] / operationStack[operationStackTop + 1]
-			elseif type == POWER
-				operationStackTop -= 1
-				operationStack[operationStackTop] = operationStack[operationStackTop] ^ operationStack[operationStackTop + 1]
-			elseif type == ABS
-				operationStack[operationStackTop] = abs(operationStack[operationStackTop])
-			elseif type == LOG
-				operationStack[operationStackTop] = log(operationStack[operationStackTop])
-			elseif type == EXP
-				operationStack[operationStackTop] = exp(operationStack[operationStackTop])
-			elseif type == SQRT
-				operationStack[operationStackTop] = sqrt(operationStack[operationStackTop])
-			end
-		else
-			operationStack[operationStackTop] = NaN
-			break
 		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
+		results[resultIndex] = operationStack[operationStackTop]
 	end
 
-	# results[] = operationStack[operationStackTop]
 	return
 end
 

package/test/InterpreterTests.jl

@@ -41,6 +41,23 @@ end
 	@test isequal(result, reference)
 end
 
+@testset "Test Add Operator" begin
+	# One test with fixed values
+	# One test with variables
+	# One test with parameters
+end
+@testset "Test Subtract Operator" begin
+	# One test with fixed values
+	# One Test with fixed values but swapped
+	# One test with variables
+	# One test with parameters
+end
+@testset "Test Abs Operator" begin
+	# One test with fixed value
+	# One test with variable
+	# One test with parameter
+end
+
 # TODO: Add several tests fo the mathematical expressions
 #       One test for each operator. A second test if the operation order matters
 #       And some more complicated expressions, with some only having variables, some only having parameters and some having both