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Correctly compile assembly functions using all three registers as separate parameters

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This commit is contained in:
Karol Stasiak 2020-03-26 01:35:44 +01:00
parent 842393106e
commit 9bc4bb949e
1 changed files with 12 additions and 0 deletions
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12
src/main/scala/millfork/compiler/mos/MosExpressionCompiler.scala
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@ -139,6 +139,9 @@ object MosExpressionCompiler extends AbstractExpressionCompiler[AssemblyLine] {
if (register == MosRegister.AX && !code.exists(_.concernsX)) {
return preserveRegisterIfNeeded(ctx, MosRegister.A, code)
}
if (register == MosRegister.AY && !code.exists(_.concernsY)) {
return preserveRegisterIfNeeded(ctx, MosRegister.A, code)
}
if (states.exists(state => AssemblyLine.treatment(code, state) != Treatment.Unchanged)) {
register match {
case MosRegister.A => AssemblyLine.implied(PHA) +: fixTsx(code) :+ AssemblyLine.implied(PLA)
@ -1758,6 +1761,15 @@ object MosExpressionCompiler extends AbstractExpressionCompiler[AssemblyLine] {
case Seq((_, param)) => param
case Seq((MosRegister.A, pa), (_, pxy)) => pa ++ preserveRegisterIfNeeded(ctx, MosRegister.A, pxy)
case Seq((_, pxy), (MosRegister.A, pa)) => pa ++ preserveRegisterIfNeeded(ctx, MosRegister.A, pxy)
case Seq((r1, p1), (r2, p2), (r3, p3)) if Set(r1, r2, r3) == Set(MosRegister.A, MosRegister.X, MosRegister.Y) =>
val pa = if (r1 == MosRegister.A) p1 else if (r2 == MosRegister.A) p2 else if (r3 == MosRegister.A) p3 else ???
val px = if (r1 == MosRegister.X) p1 else if (r2 == MosRegister.X) p2 else if (r3 == MosRegister.X) p3 else ???
val py = if (r1 == MosRegister.Y) p1 else if (r2 == MosRegister.Y) p2 else if (r3 == MosRegister.Y) p3 else ???
if (!px.exists(_.concernsY)) {
pa ++ preserveRegisterIfNeeded(ctx, MosRegister.A, py) ++ preserveRegisterIfNeeded(ctx, MosRegister.AY, px)
} else {
pa ++ preserveRegisterIfNeeded(ctx, MosRegister.A, px) ++ preserveRegisterIfNeeded(ctx, MosRegister.AX, py)
}
case other =>
if (ctx.options.flag(CompilationFlag.BuggyCodeWarning)) {
ctx.log.warn("Unsupported register parameter combination: " + other.map(_._1.toString).mkString("(", ",", ")"), expr.position)