feat: used Chains instead of Lists
This commit is contained in:
Jonny
parent
7fd92b4212
commit
7953790f4d
GPG Key ID:
15E168A8B332382C
@ -2,6 +2,8 @@ package wacc
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import scala.collection.mutable.LinkedHashMap
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import scala.collection.mutable.ListBuffer
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import cats.data.Chain
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import cats.syntax.foldable._
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object asmGenerator {
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import microWacc._
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@ -31,33 +33,38 @@ object asmGenerator {
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val Program(funcs, main) = microProg
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val progAsm =
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LabelDef("main") ::
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Chain.one(LabelDef("main")) ++
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funcPrologue() ++
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List(stack.align()) ++
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main.flatMap(generateStmt) ++
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List(Move(RAX, ImmediateVal(0))) ++
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Chain(stack.align()) ++
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main.foldLeft(Chain.empty[AsmLine])(_ ++ generateStmt(_)) ++
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Chain.one(Move(RAX, ImmediateVal(0))) ++
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funcEpilogue() ++
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generateBuiltInFuncs()
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val strDirs = strings.toList.zipWithIndex.flatMap { case (str, i) =>
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List(
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Directive.Int(str.size),
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LabelDef(s".L.str$i"),
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Directive.Asciz(str.escaped)
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)
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val strDirs = strings.toList.zipWithIndex.foldLeft(Chain.empty[AsmLine]) {
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case (acc, (str, i)) =>
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acc ++ Chain(
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Directive.Int(str.size),
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LabelDef(s".L.str$i"),
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Directive.Asciz(str.escaped)
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)
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}
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List(Directive.IntelSyntax, Directive.Global("main"), Directive.RoData) ++
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strDirs ++
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List(Directive.Text) ++
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progAsm
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val finalChain = Chain(
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Directive.IntelSyntax,
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Directive.Global("main"),
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Directive.RoData
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) ++ strDirs ++ Chain.one(Directive.Text) ++ progAsm
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finalChain.toList
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}
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def wrapFunc(labelName: String, funcBody: List[AsmLine])(using
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def wrapFunc(labelName: String, funcBody: Chain[AsmLine])(using
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stack: Stack,
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strings: ListBuffer[String]
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): List[AsmLine] = {
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LabelDef(labelName) ::
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): Chain[AsmLine] = {
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Chain.one(LabelDef(labelName)) ++
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funcPrologue() ++
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funcBody ++
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funcEpilogue()
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@ -65,16 +72,15 @@ object asmGenerator {
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def generateBuiltInFuncs()(using
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stack: Stack,
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strings: ListBuffer[String],
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labelGenerator: LabelGenerator
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): List[AsmLine] = {
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strings: ListBuffer[String]
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): Chain[AsmLine] = {
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wrapFunc(
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labelGenerator.getLabel(Builtin.Exit),
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List(stack.align(), assemblyIR.Call(CLibFunc.Exit))
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Chain(stack.align(), assemblyIR.Call(CLibFunc.Exit))
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) ++
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wrapFunc(
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labelGenerator.getLabel(Builtin.Printf),
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List(
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Chain(
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stack.align(),
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assemblyIR.Call(CLibFunc.PrintF),
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Move(RDI, ImmediateVal(0)),
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@ -83,14 +89,14 @@ object asmGenerator {
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) ++
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wrapFunc(
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labelGenerator.getLabel(Builtin.Malloc),
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List(
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Chain.one(
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stack.align()
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)
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) ++
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wrapFunc(labelGenerator.getLabel(Builtin.Free), List()) ++
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wrapFunc(labelGenerator.getLabel(Builtin.Free), Chain.empty) ++
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wrapFunc(
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labelGenerator.getLabel(Builtin.Read),
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List(
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Chain(
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stack.align(),
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stack.reserve(),
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stack.push(RSI),
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@ -104,11 +110,7 @@ object asmGenerator {
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def generateStmt(
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stmt: Stmt
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)(using
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stack: Stack,
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strings: ListBuffer[String],
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labelGenerator: LabelGenerator
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): List[AsmLine] =
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)(using stack: Stack, strings: ListBuffer[String]): Chain[AsmLine] =
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stmt match {
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case Assign(lhs, rhs) =>
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var dest: () => IndexAddress =
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@ -117,15 +119,15 @@ object asmGenerator {
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case ident: Ident =>
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dest = stack.accessVar(ident)
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if (!stack.contains(ident)) {
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List(stack.reserve(ident))
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} else Nil
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Chain.one(stack.reserve(ident))
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} else Chain.empty
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// TODO lhs = arrayElem
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case _ =>
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// dest = ???
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List()
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Chain.empty
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}) ++
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evalExprOntoStack(rhs) ++
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List(
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Chain(
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stack.pop(RAX),
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Move(dest(), RAX)
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)
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@ -133,47 +135,48 @@ object asmGenerator {
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val elseLabel = labelGenerator.getLabel()
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val endLabel = labelGenerator.getLabel()
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evalExprOntoStack(cond) ++
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List(
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Compare(stack.head(SizeDir.Word), ImmediateVal(0)),
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stack.drop(),
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Jump(LabelArg(elseLabel), Cond.Equal)
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Chain.fromSeq(
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List(
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Compare(stack.head(SizeDir.Word), ImmediateVal(0)),
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stack.drop(),
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Jump(LabelArg(elseLabel), Cond.Equal)
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)
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) ++
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thenBranch.flatMap(generateStmt) ++
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List(Jump(LabelArg(endLabel)), LabelDef(elseLabel)) ++
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elseBranch.flatMap(generateStmt) ++
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List(LabelDef(endLabel))
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Chain.fromSeq(thenBranch).flatMap(generateStmt) ++
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Chain.fromSeq(List(Jump(LabelArg(endLabel)), LabelDef(elseLabel))) ++
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Chain.fromSeq(elseBranch).flatMap(generateStmt) ++
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Chain.one(LabelDef(endLabel))
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}
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case While(cond, body) => {
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val startLabel = labelGenerator.getLabel()
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val endLabel = labelGenerator.getLabel()
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List(LabelDef(startLabel)) ++
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Chain.one(LabelDef(startLabel)) ++
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evalExprOntoStack(cond) ++
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List(
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Chain(
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Compare(stack.head(SizeDir.Word), ImmediateVal(0)),
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stack.drop(),
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Jump(LabelArg(endLabel), Cond.Equal)
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) ++
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body.flatMap(generateStmt) ++
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List(Jump(LabelArg(startLabel)), LabelDef(endLabel))
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Chain.fromSeq(body).flatMap(generateStmt) ++
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Chain(Jump(LabelArg(startLabel)), LabelDef(endLabel))
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}
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case microWacc.Return(expr) =>
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evalExprOntoStack(expr) ++
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List(stack.pop(RAX), assemblyIR.Return())
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Chain(stack.pop(RAX), assemblyIR.Return())
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case call: microWacc.Call => generateCall(call)
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}
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def evalExprOntoStack(expr: Expr)(using
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stack: Stack,
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strings: ListBuffer[String],
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labelGenerator: LabelGenerator
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): List[AsmLine] = {
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strings: ListBuffer[String]
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): Chain[AsmLine] = {
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val out = expr match {
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case IntLiter(v) =>
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List(stack.push(ImmediateVal(v)))
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Chain.one(stack.push(ImmediateVal(v)))
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case CharLiter(v) =>
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List(stack.push(ImmediateVal(v.toInt)))
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Chain.one(stack.push(ImmediateVal(v.toInt)))
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case ident: Ident =>
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List(stack.push(stack.accessVar(ident)()))
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Chain.one(stack.push(stack.accessVar(ident)()))
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case ArrayLiter(elems) =>
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expr.ty match {
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case KnownType.String =>
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@ -181,7 +184,7 @@ object asmGenerator {
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case CharLiter(v) => v
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case _ => ""
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}.mkString
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List(
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Chain(
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Load(
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RAX,
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IndexAddress(
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@ -192,26 +195,24 @@ object asmGenerator {
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stack.push(RAX)
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)
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// TODO other array types
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case _ => List()
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case _ => Chain.empty
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}
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case BoolLiter(v) => List(stack.push(ImmediateVal(if (v) 1 else 0)))
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case NullLiter() => List(stack.push(ImmediateVal(0)))
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case ArrayElem(value, indices) => List()
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case BoolLiter(v) => Chain.one(stack.push(ImmediateVal(if (v) 1 else 0)))
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case NullLiter() => Chain.one(stack.push(ImmediateVal(0)))
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case ArrayElem(value, indices) => Chain.empty
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case UnaryOp(x, op) =>
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evalExprOntoStack(x) ++
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(op match {
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// TODO: chr and ord are TYPE CASTS. They do not change the internal value,
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// but will need bound checking e.t.c.
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case UnaryOperator.Chr => List()
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case UnaryOperator.Ord => List()
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case UnaryOperator.Len => List()
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case UnaryOperator.Chr | UnaryOperator.Ord | UnaryOperator.Len => Chain.empty
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case UnaryOperator.Negate =>
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List(
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Chain.one(
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Negate(stack.head(SizeDir.Word))
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)
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case UnaryOperator.Not =>
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evalExprOntoStack(x) ++
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List(
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Chain.one(
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Xor(stack.head(SizeDir.Word), ImmediateVal(1))
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)
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@ -221,7 +222,7 @@ object asmGenerator {
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case BinaryOperator.Add =>
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evalExprOntoStack(x) ++
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evalExprOntoStack(y) ++
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List(
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Chain(
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stack.pop(RAX),
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Add(stack.head(SizeDir.Word), EAX)
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// TODO OVERFLOWING
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@ -229,7 +230,7 @@ object asmGenerator {
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case BinaryOperator.Sub =>
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evalExprOntoStack(x) ++
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evalExprOntoStack(y) ++
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List(
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Chain(
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stack.pop(RAX),
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Subtract(stack.head(SizeDir.Word), EAX)
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// TODO OVERFLOWING
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@ -237,7 +238,7 @@ object asmGenerator {
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case BinaryOperator.Mul =>
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evalExprOntoStack(x) ++
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evalExprOntoStack(y) ++
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List(
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Chain(
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stack.pop(RAX),
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Multiply(EAX, stack.head(SizeDir.Word)),
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stack.drop(),
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@ -247,7 +248,7 @@ object asmGenerator {
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case BinaryOperator.Div =>
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evalExprOntoStack(y) ++
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evalExprOntoStack(x) ++
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List(
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Chain(
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stack.pop(RAX),
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Divide(stack.head(SizeDir.Word)),
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stack.drop(),
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@ -257,7 +258,7 @@ object asmGenerator {
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case BinaryOperator.Mod =>
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evalExprOntoStack(y) ++
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evalExprOntoStack(x) ++
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List(
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Chain(
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stack.pop(RAX),
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Divide(stack.head(SizeDir.Word)),
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stack.drop(),
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@ -279,51 +280,56 @@ object asmGenerator {
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case BinaryOperator.And =>
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evalExprOntoStack(x) ++
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evalExprOntoStack(y) ++
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List(
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Chain(
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stack.pop(RAX),
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And(stack.head(SizeDir.Word), EAX)
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)
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case BinaryOperator.Or =>
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evalExprOntoStack(x) ++
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evalExprOntoStack(y) ++
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List(
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Chain(
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stack.pop(RAX),
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Or(stack.head(SizeDir.Word), EAX)
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)
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}
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case call: microWacc.Call =>
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generateCall(call) ++
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List(stack.push(RAX))
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Chain.one(stack.push(RAX))
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}
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if out.isEmpty then List(stack.push(ImmediateVal(0))) else out
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if out.isEmpty then Chain.one(stack.push(ImmediateVal(0))) else out
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}
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def generateCall(call: microWacc.Call)(using
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stack: Stack,
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strings: ListBuffer[String],
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labelGenerator: LabelGenerator
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): List[AsmLine] = {
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strings: ListBuffer[String]
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): Chain[AsmLine] = {
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val argRegs = List(RDI, RSI, RDX, RCX, R8, R9)
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val microWacc.Call(target, args) = call
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argRegs.zip(args).flatMap { (reg, expr) =>
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evalExprOntoStack(expr) ++
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List(stack.pop(reg))
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} ++
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args.drop(argRegs.size).flatMap(evalExprOntoStack) ++
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List(assemblyIR.Call(LabelArg(labelGenerator.getLabel(target)))) ++
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(if (args.size > argRegs.size) {
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List(stack.drop(args.size - argRegs.size))
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} else Nil)
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val regMoves = argRegs
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.zip(args)
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.map { (reg, expr) =>
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evalExprOntoStack(expr) ++
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Chain.one(stack.pop(reg))
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}
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.combineAll
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val stackPushes = args.drop(argRegs.size).map(evalExprOntoStack).combineAll
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regMoves ++
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stackPushes ++
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Chain.one(assemblyIR.Call(LabelArg(labelGenerator.getLabel(target)))) ++
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(if (args.size > argRegs.size) Chain.one(stack.drop(args.size - argRegs.size))
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else Chain.empty)
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}
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def generateComparison(x: Expr, y: Expr, cond: Cond)(using
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stack: Stack,
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strings: ListBuffer[String],
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labelGenerator: LabelGenerator
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): List[AsmLine] = {
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strings: ListBuffer[String]
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): Chain[AsmLine] = {
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evalExprOntoStack(x) ++
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evalExprOntoStack(y) ++
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List(
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Chain(
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stack.pop(RAX),
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Compare(stack.head(SizeDir.Word), EAX),
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Set(Register(RegSize.Byte, RegName.AL), cond),
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@ -334,15 +340,15 @@ object asmGenerator {
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}
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// Missing a sub instruction but dont think we need it
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def funcPrologue()(using stack: Stack): List[AsmLine] = {
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List(
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def funcPrologue()(using stack: Stack): Chain[AsmLine] = {
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Chain(
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stack.push(RBP),
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Move(RBP, Register(RegSize.R64, RegName.SP))
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)
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}
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def funcEpilogue()(using stack: Stack): List[AsmLine] = {
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List(
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def funcEpilogue()(using stack: Stack): Chain[AsmLine] = {
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Chain(
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Move(Register(RegSize.R64, RegName.SP), RBP),
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stack.pop(RBP),
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assemblyIR.Return()
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