471 lines
22 KiB
Haskell
471 lines
22 KiB
Haskell
module Language.Elna.RiscV.CodeGenerator
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( Statement(..)
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, generateRiscV
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, riscVConfiguration
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) where
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import Control.Monad.Trans.State (State, get, evalState, modify')
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import Data.HashMap.Strict (HashMap)
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import qualified Data.HashMap.Strict as HashMap
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import Data.Int (Int32)
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import Data.Word (Word32)
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import Data.Vector (Vector)
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import qualified Data.Vector as Vector
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import qualified Language.Elna.Architecture.RiscV as RiscV
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import Language.Elna.Backend.Allocator (MachineConfiguration(..), Store(..))
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import Language.Elna.Backend.Intermediate (Label(..), Operand(..), Quadruple(..))
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import Language.Elna.Location (Identifier(..))
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import Data.Bits (Bits(..))
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import Data.Foldable (Foldable(..), foldlM)
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import Data.Text (Text)
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import qualified Data.Text.Lazy.Builder.Int as Text.Builder
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import qualified Data.Text.Lazy.Builder as Text.Builder
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import qualified Data.Text.Lazy as Text.Lazy
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data Directive
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= GlobalDirective
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| FunctionDirective
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deriving (Eq, Show)
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data Statement
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= Instruction RiscV.Instruction
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| JumpLabel Text [Directive]
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deriving Eq
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riscVConfiguration :: MachineConfiguration RiscV.XRegister
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riscVConfiguration = MachineConfiguration
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{ temporaryRegisters =
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[ RiscV.T0
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, RiscV.T1
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, RiscV.T2
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, RiscV.T3
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, RiscV.T4
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, RiscV.T5
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, RiscV.T6
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]
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}
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-- | Reserved register used for calculations to save an immediate temporary.
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immediateRegister :: RiscV.XRegister
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immediateRegister = RiscV.A7
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type RiscVStore = Store RiscV.XRegister
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type RiscVQuadruple = Quadruple RiscVStore
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type RiscVOperand = Operand RiscVStore
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newtype RiscVGenerator a = RiscVGenerator
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{ runRiscVGenerator :: State Word32 a }
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instance Functor RiscVGenerator
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where
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fmap f (RiscVGenerator x) = RiscVGenerator $ f <$> x
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instance Applicative RiscVGenerator
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where
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pure = RiscVGenerator . pure
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(RiscVGenerator f) <*> (RiscVGenerator x) = RiscVGenerator $ f <*> x
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instance Monad RiscVGenerator
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where
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(RiscVGenerator x) >>= f = RiscVGenerator $ x >>= (runRiscVGenerator . f)
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createLabel :: RiscVGenerator Text
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createLabel = do
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currentCounter <- RiscVGenerator get
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RiscVGenerator $ modify' (+ 1)
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pure
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$ mappend ".A"
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$ Text.Lazy.toStrict
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$ Text.Builder.toLazyText
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$ Text.Builder.decimal currentCounter
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generateRiscV :: HashMap Identifier (Vector RiscVQuadruple) -> Vector Statement
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generateRiscV = flip evalState 0
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. runRiscVGenerator
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. foldlM go Vector.empty
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. HashMap.toList
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where
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go accumulator (Identifier key, value) =
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let code = Vector.cons (JumpLabel key [GlobalDirective, FunctionDirective])
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. fold <$> mapM quadruple value
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in (accumulator <>) <$> code
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quadruple :: RiscVQuadruple -> RiscVGenerator (Vector Statement)
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quadruple StartQuadruple = pure $ Vector.fromList
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[ Instruction (RiscV.BaseInstruction RiscV.OpImm $ RiscV.I RiscV.SP RiscV.ADDI RiscV.SP (negate 4))
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, Instruction (RiscV.BaseInstruction RiscV.Store $ RiscV.S 0 RiscV.SW RiscV.SP RiscV.S0)
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, Instruction (RiscV.BaseInstruction RiscV.Store $ RiscV.S 4 RiscV.SW RiscV.SP RiscV.RA)
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, Instruction (RiscV.BaseInstruction RiscV.OpImm $ RiscV.I RiscV.S0 RiscV.ADDI RiscV.SP 4)
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]
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quadruple (ParameterQuadruple operand1) =
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let (operandRegister, statements) = loadImmediateOrRegister operand1 RiscV.A0
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in pure $ mappend statements $ Vector.fromList
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[ Instruction (RiscV.BaseInstruction RiscV.OpImm $ RiscV.I RiscV.SP RiscV.ADDI RiscV.SP (negate 4))
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, Instruction (RiscV.BaseInstruction RiscV.Store $ RiscV.S 0 RiscV.SW RiscV.SP operandRegister)
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]
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quadruple (CallQuadruple callName numberOfArguments) = pure $ Vector.fromList
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[ Instruction (RiscV.CallInstruction callName)
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, Instruction (RiscV.BaseInstruction RiscV.OpImm $ RiscV.I RiscV.SP RiscV.ADDI RiscV.SP (numberOfArguments * 4))
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]
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quadruple StopQuadruple = pure $ Vector.fromList
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[ Instruction (RiscV.BaseInstruction RiscV.Load $ RiscV.I RiscV.S0 RiscV.LW RiscV.SP 0)
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, Instruction (RiscV.BaseInstruction RiscV.Load $ RiscV.I RiscV.RA RiscV.LW RiscV.SP 4)
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, Instruction (RiscV.BaseInstruction RiscV.OpImm $ RiscV.I RiscV.SP RiscV.ADDI RiscV.SP 4)
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, Instruction (RiscV.BaseInstruction RiscV.Jalr $ RiscV.I RiscV.RA RiscV.JALR RiscV.Zero 0)
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]
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quadruple (AddQuadruple operand1 operand2 (Store register))
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| IntOperand immediateOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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pure $ lui (immediateOperand1 + immediateOperand2) register
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| VariableOperand variableOperand1 <- operand1
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, VariableOperand variableOperand2 <- operand2 =
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let Store operandRegister1 = variableOperand1
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Store operandRegister2 = variableOperand2
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in pure $ Vector.singleton $ Instruction
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$ RiscV.BaseInstruction RiscV.Op
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$ RiscV.R register RiscV.ADD operandRegister1 operandRegister2 (RiscV.Funct7 0b0000000)
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| VariableOperand variableOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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addImmediateRegister variableOperand1 immediateOperand2
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| IntOperand immediateOperand1 <- operand1
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, VariableOperand variableOperand2 <- operand2 =
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addImmediateRegister variableOperand2 immediateOperand1
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where
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addImmediateRegister variableOperand immediateOperand =
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let statements = lui immediateOperand register
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Store operandRegister = variableOperand
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in pure $ Vector.snoc statements
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$ Instruction
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$ RiscV.BaseInstruction RiscV.Op
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$ RiscV.R register RiscV.ADD register operandRegister
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$ RiscV.Funct7 0b0000000
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quadruple (SubtractionQuadruple operand1 operand2 (Store register))
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| IntOperand immediateOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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pure $ lui (immediateOperand1 - immediateOperand2) register
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| VariableOperand variableOperand1 <- operand1
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, VariableOperand variableOperand2 <- operand2 =
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let Store operandRegister1 = variableOperand1
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Store operandRegister2 = variableOperand2
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in pure $ Vector.singleton $ Instruction
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$ RiscV.BaseInstruction RiscV.Op
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$ RiscV.R register RiscV.SUB operandRegister1 operandRegister2
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$ RiscV.Funct7 0b0100000
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| IntOperand immediateOperand1 <- operand1
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, VariableOperand variableOperand2 <- operand2 =
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let statements1 = lui immediateOperand1 register
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Store operandRegister2 = variableOperand2
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in pure $ Vector.snoc statements1
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$ Instruction
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$ RiscV.BaseInstruction RiscV.Op
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$ RiscV.R register RiscV.SUB register operandRegister2
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$ RiscV.Funct7 0b0100000
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| VariableOperand variableOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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let statements2 = lui (negate immediateOperand2) register
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Store operandRegister1 = variableOperand1
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in pure $ Vector.snoc statements2
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$ Instruction
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$ RiscV.BaseInstruction RiscV.Op
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$ RiscV.R register RiscV.ADD register operandRegister1
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$ RiscV.Funct7 0b0000000
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quadruple (NegationQuadruple operand1 (Store register))
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| IntOperand immediateOperand1 <- operand1 =
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pure $ lui (negate immediateOperand1) register
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| VariableOperand variableOperand1 <- operand1 =
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let Store operandRegister1 = variableOperand1
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in pure $ Vector.singleton
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$ Instruction
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$ RiscV.BaseInstruction RiscV.Op
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$ RiscV.R register RiscV.SUB RiscV.Zero operandRegister1
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$ RiscV.Funct7 0b0100000
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quadruple (ProductQuadruple operand1 operand2 (Store register))
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| IntOperand immediateOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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pure $ lui (immediateOperand1 * immediateOperand2) register
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| VariableOperand variableOperand1 <- operand1
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, VariableOperand variableOperand2 <- operand2 =
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let Store operandRegister1 = variableOperand1
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Store operandRegister2 = variableOperand2
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in pure $ Vector.singleton $ Instruction
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$ RiscV.BaseInstruction RiscV.Op
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$ RiscV.R register RiscV.MUL operandRegister1 operandRegister2 (RiscV.Funct7 0b0000001)
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| VariableOperand variableOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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multiplyImmediateRegister variableOperand1 immediateOperand2
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| IntOperand immediateOperand1 <- operand1
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, VariableOperand variableOperand2 <- operand2 =
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multiplyImmediateRegister variableOperand2 immediateOperand1
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where
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multiplyImmediateRegister variableOperand immediateOperand =
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let statements = lui immediateOperand register
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Store operandRegister = variableOperand
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in pure $ Vector.snoc statements
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$ Instruction
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$ RiscV.BaseInstruction RiscV.Op
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$ RiscV.R register RiscV.MUL register operandRegister
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$ RiscV.Funct7 0b0000001
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quadruple (DivisionQuadruple operand1 operand2 (Store register))
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| IntOperand immediateOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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if immediateOperand2 == 0
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then pure $ Vector.singleton
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$ Instruction (RiscV.CallInstruction "_divide_by_zero_error")
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else pure $ lui (quot immediateOperand1 immediateOperand2) register
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| VariableOperand variableOperand1 <- operand1
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, VariableOperand variableOperand2 <- operand2 = do
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let Store operandRegister1 = variableOperand1
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Store operandRegister2 = variableOperand2
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divisionInstruction = Instruction
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$ RiscV.BaseInstruction RiscV.Op
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$ RiscV.R register RiscV.DIV operandRegister1 operandRegister2 (RiscV.Funct7 0b0000001)
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branchLabel <- createLabel
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let branchInstruction = Instruction
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$ RiscV.RelocatableInstruction RiscV.Branch
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$ RiscV.RBranch branchLabel RiscV.BNE RiscV.Zero operandRegister2
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pure $ Vector.fromList
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[ branchInstruction
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, Instruction (RiscV.CallInstruction "_divide_by_zero_error")
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, JumpLabel branchLabel []
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, divisionInstruction
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]
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| VariableOperand variableOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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let statements2 = lui immediateOperand2 register
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Store operandRegister1 = variableOperand1
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in pure $ Vector.snoc statements2
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$ Instruction
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$ RiscV.BaseInstruction RiscV.Op
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$ RiscV.R register RiscV.DIV operandRegister1 register
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$ RiscV.Funct7 0b0000001
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| IntOperand immediateOperand1 <- operand1
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, VariableOperand variableOperand2 <- operand2 =
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let statements1 = lui immediateOperand1 register
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Store operandRegister2 = variableOperand2
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in pure $ Vector.snoc statements1
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$ Instruction
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$ RiscV.BaseInstruction RiscV.Op
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$ RiscV.R register RiscV.DIV register operandRegister2
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$ RiscV.Funct7 0b0000001
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quadruple (LabelQuadruple (Label label)) = pure $ Vector.singleton $ JumpLabel label mempty
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quadruple (GoToQuadruple label) = pure $ Vector.singleton $ unconditionalJal label
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quadruple (EqualQuadruple operand1 operand2 goToLabel)
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| IntOperand immediateOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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if immediateOperand1 == immediateOperand2
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then pure $ Vector.singleton $ unconditionalJal goToLabel
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else pure Vector.empty
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| VariableOperand variableOperand1 <- operand1
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, VariableOperand variableOperand2 <- operand2 = do
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let Store operandRegister1 = variableOperand1
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Store operandRegister2 = variableOperand2
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Label goToLabel' = goToLabel
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pure $ Vector.singleton
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$ Instruction
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$ RiscV.RelocatableInstruction RiscV.Branch
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$ RiscV.RBranch goToLabel' RiscV.BEQ operandRegister1 operandRegister2
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| VariableOperand variableOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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compareImmediateRegister variableOperand1 immediateOperand2
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| IntOperand immediateOperand1 <- operand1
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, VariableOperand variableOperand2 <- operand2 =
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compareImmediateRegister variableOperand2 immediateOperand1
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where
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compareImmediateRegister variableOperand immediateOperand =
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let statements = lui immediateOperand immediateRegister
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Store operandRegister = variableOperand
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Label goToLabel' = goToLabel
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in pure $ Vector.snoc statements
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$ Instruction
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$ RiscV.RelocatableInstruction RiscV.Branch
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$ RiscV.RBranch goToLabel' RiscV.BEQ operandRegister immediateRegister
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quadruple (NonEqualQuadruple operand1 operand2 goToLabel)
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| IntOperand immediateOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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if immediateOperand1 /= immediateOperand2
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then pure $ Vector.singleton $ unconditionalJal goToLabel
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else pure Vector.empty
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| VariableOperand variableOperand1 <- operand1
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, VariableOperand variableOperand2 <- operand2 = do
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let Store operandRegister1 = variableOperand1
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Store operandRegister2 = variableOperand2
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Label goToLabel' = goToLabel
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pure $ Vector.singleton
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$ Instruction
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$ RiscV.RelocatableInstruction RiscV.Branch
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$ RiscV.RBranch goToLabel' RiscV.BNE operandRegister1 operandRegister2
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| VariableOperand variableOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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compareImmediateRegister variableOperand1 immediateOperand2
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| IntOperand immediateOperand1 <- operand1
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, VariableOperand variableOperand2 <- operand2 =
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compareImmediateRegister variableOperand2 immediateOperand1
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where
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compareImmediateRegister variableOperand immediateOperand =
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let statements = lui immediateOperand immediateRegister
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Store operandRegister = variableOperand
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Label goToLabel' = goToLabel
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in pure $ Vector.snoc statements
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$ Instruction
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$ RiscV.RelocatableInstruction RiscV.Branch
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$ RiscV.RBranch goToLabel' RiscV.BNE operandRegister immediateRegister
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quadruple (LessQuadruple operand1 operand2 goToLabel)
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| IntOperand immediateOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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if immediateOperand1 < immediateOperand2
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then pure $ Vector.singleton $ unconditionalJal goToLabel
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else pure Vector.empty
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| VariableOperand variableOperand1 <- operand1
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, VariableOperand variableOperand2 <- operand2 = do
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let Store operandRegister1 = variableOperand1
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Store operandRegister2 = variableOperand2
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Label goToLabel' = goToLabel
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pure $ Vector.singleton
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$ Instruction
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$ RiscV.RelocatableInstruction RiscV.Branch
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$ RiscV.RBranch goToLabel' RiscV.BLT operandRegister1 operandRegister2
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| VariableOperand variableOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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let statements2 = lui immediateOperand2 immediateRegister
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Store operandRegister1 = variableOperand1
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Label goToLabel' = goToLabel
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in pure $ Vector.snoc statements2
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$ Instruction
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$ RiscV.RelocatableInstruction RiscV.Branch
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$ RiscV.RBranch goToLabel' RiscV.BLT operandRegister1 immediateRegister
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| IntOperand immediateOperand1 <- operand1
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, VariableOperand variableOperand2 <- operand2 =
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let statements1 = lui immediateOperand1 immediateRegister
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Store operandRegister2 = variableOperand2
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Label goToLabel' = goToLabel
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in pure $ Vector.snoc statements1
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$ Instruction
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$ RiscV.RelocatableInstruction RiscV.Branch
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$ RiscV.RBranch goToLabel' RiscV.BLT immediateRegister operandRegister2
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quadruple (GreaterQuadruple operand1 operand2 goToLabel)
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| IntOperand immediateOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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if immediateOperand1 > immediateOperand2
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then pure $ Vector.singleton $ unconditionalJal goToLabel
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else pure Vector.empty
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| VariableOperand variableOperand1 <- operand1
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, VariableOperand variableOperand2 <- operand2 = do
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let Store operandRegister1 = variableOperand1
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Store operandRegister2 = variableOperand2
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Label goToLabel' = goToLabel
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pure $ Vector.singleton
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$ Instruction
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$ RiscV.RelocatableInstruction RiscV.Branch
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$ RiscV.RBranch goToLabel' RiscV.BLT operandRegister2 operandRegister1
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| VariableOperand variableOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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let statements2 = lui immediateOperand2 immediateRegister
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Store operandRegister1 = variableOperand1
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Label goToLabel' = goToLabel
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in pure $ Vector.snoc statements2
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$ Instruction
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$ RiscV.RelocatableInstruction RiscV.Branch
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$ RiscV.RBranch goToLabel' RiscV.BLT immediateRegister operandRegister1
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| IntOperand immediateOperand1 <- operand1
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, VariableOperand variableOperand2 <- operand2 =
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let statements1 = lui immediateOperand1 immediateRegister
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Store operandRegister2 = variableOperand2
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Label goToLabel' = goToLabel
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in pure $ Vector.snoc statements1
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$ Instruction
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$ RiscV.RelocatableInstruction RiscV.Branch
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$ RiscV.RBranch goToLabel' RiscV.BLT operandRegister2 immediateRegister
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quadruple (LessOrEqualQuadruple operand1 operand2 goToLabel)
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| IntOperand immediateOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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if immediateOperand1 <= immediateOperand2
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then pure $ Vector.singleton $ unconditionalJal goToLabel
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else pure Vector.empty
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| VariableOperand variableOperand1 <- operand1
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, VariableOperand variableOperand2 <- operand2 = do
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let Store operandRegister1 = variableOperand1
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Store operandRegister2 = variableOperand2
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Label goToLabel' = goToLabel
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pure $ Vector.singleton
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$ Instruction
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$ RiscV.RelocatableInstruction RiscV.Branch
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$ RiscV.RBranch goToLabel' RiscV.BGE operandRegister2 operandRegister1
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| VariableOperand variableOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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let statements2 = lui immediateOperand2 immediateRegister
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Store operandRegister1 = variableOperand1
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Label goToLabel' = goToLabel
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in pure $ Vector.snoc statements2
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$ Instruction
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$ RiscV.RelocatableInstruction RiscV.Branch
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$ RiscV.RBranch goToLabel' RiscV.BGE immediateRegister operandRegister1
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| IntOperand immediateOperand1 <- operand1
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, VariableOperand variableOperand2 <- operand2 =
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let statements1 = lui immediateOperand1 immediateRegister
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Store operandRegister2 = variableOperand2
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Label goToLabel' = goToLabel
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in pure $ Vector.snoc statements1
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$ Instruction
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$ RiscV.RelocatableInstruction RiscV.Branch
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$ RiscV.RBranch goToLabel' RiscV.BGE operandRegister2 immediateRegister
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quadruple (GreaterOrEqualQuadruple operand1 operand2 goToLabel)
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| IntOperand immediateOperand1 <- operand1
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, IntOperand immediateOperand2 <- operand2 =
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if immediateOperand1 >= immediateOperand2
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then pure $ Vector.singleton $ unconditionalJal goToLabel
|
|
else pure Vector.empty
|
|
| VariableOperand variableOperand1 <- operand1
|
|
, VariableOperand variableOperand2 <- operand2 = do
|
|
let Store operandRegister1 = variableOperand1
|
|
Store operandRegister2 = variableOperand2
|
|
Label goToLabel' = goToLabel
|
|
pure $ Vector.singleton
|
|
$ Instruction
|
|
$ RiscV.RelocatableInstruction RiscV.Branch
|
|
$ RiscV.RBranch goToLabel' RiscV.BGE operandRegister1 operandRegister2
|
|
| VariableOperand variableOperand1 <- operand1
|
|
, IntOperand immediateOperand2 <- operand2 =
|
|
let statements2 = lui immediateOperand2 immediateRegister
|
|
Store operandRegister1 = variableOperand1
|
|
Label goToLabel' = goToLabel
|
|
in pure $ Vector.snoc statements2
|
|
$ Instruction
|
|
$ RiscV.RelocatableInstruction RiscV.Branch
|
|
$ RiscV.RBranch goToLabel' RiscV.BGE operandRegister1 immediateRegister
|
|
| IntOperand immediateOperand1 <- operand1
|
|
, VariableOperand variableOperand2 <- operand2 =
|
|
let statements1 = lui immediateOperand1 immediateRegister
|
|
Store operandRegister2 = variableOperand2
|
|
Label goToLabel' = goToLabel
|
|
in pure $ Vector.snoc statements1
|
|
$ Instruction
|
|
$ RiscV.RelocatableInstruction RiscV.Branch
|
|
$ RiscV.RBranch goToLabel' RiscV.BGE immediateRegister operandRegister2
|
|
|
|
unconditionalJal :: Label -> Statement
|
|
unconditionalJal (Label goToLabel) = Instruction
|
|
$ RiscV.RelocatableInstruction RiscV.Jal
|
|
$ RiscV.RJal RiscV.Zero goToLabel
|
|
|
|
loadImmediateOrRegister :: RiscVOperand -> RiscV.XRegister -> (RiscV.XRegister, Vector Statement)
|
|
loadImmediateOrRegister (IntOperand intValue) targetRegister =
|
|
(targetRegister, lui intValue targetRegister)
|
|
loadImmediateOrRegister (VariableOperand (Store register)) _ = (register, Vector.empty)
|
|
|
|
lui :: Int32 -> RiscV.XRegister -> Vector Statement
|
|
lui intValue targetRegister
|
|
| intValue >= -2048
|
|
, intValue <= 2047 = Vector.singleton
|
|
$ Instruction (RiscV.BaseInstruction RiscV.OpImm $ RiscV.I targetRegister RiscV.ADDI RiscV.Zero lo)
|
|
| intValue .&. 0x800 /= 0 = Vector.fromList
|
|
[ Instruction (RiscV.BaseInstruction RiscV.Lui $ RiscV.U targetRegister $ fromIntegral $ succ hi)
|
|
, Instruction (RiscV.BaseInstruction RiscV.OpImm $ RiscV.I targetRegister RiscV.ADDI targetRegister lo)
|
|
]
|
|
| otherwise = Vector.fromList
|
|
[ Instruction (RiscV.BaseInstruction RiscV.Lui $ RiscV.U targetRegister $ fromIntegral hi)
|
|
, Instruction (RiscV.BaseInstruction RiscV.OpImm $ RiscV.I targetRegister RiscV.ADDI targetRegister lo)
|
|
]
|
|
where
|
|
hi = intValue `shiftR` 12
|
|
lo = fromIntegral intValue
|