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forloop asm done

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This commit is contained in:
Irmen de Jong 2020-08-18 15:29:39 +02:00
parent 1de0ebb7bc
commit cf6ea63fa6
3 changed files with 24 additions and 12 deletions
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2
compiler/src/prog8/compiler/Zeropage.kt
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@ -16,7 +16,7 @@ abstract class Zeropage(protected val options: CompilationOptions) {
fun available() = if(options.zeropage==ZeropageType.DONTUSE) 0 else free.size
fun allocate(scopedname: String, datatype: DataType, position: Position?, errors: ErrorReporter): Int {
assert(scopedname.isEmpty() || !allocations.values.any { it.first==scopedname } ) {"isSameAs scopedname can't be allocated twice"}
assert(scopedname.isEmpty() || !allocations.values.any { it.first==scopedname } ) {"scopedname can't be allocated twice"}
if(options.zeropage==ZeropageType.DONTUSE)
throw CompilerException("zero page usage has been disabled")

6
compiler/src/prog8/compiler/target/c64/codegen/AsmGen.kt
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@ -27,9 +27,9 @@ import kotlin.math.absoluteValue
internal class AsmGen(private val program: Program,
private val errors: ErrorReporter,
private val zeropage: Zeropage,
private val options: CompilationOptions,
val errors: ErrorReporter,
val zeropage: Zeropage,
val options: CompilationOptions,
private val outputDir: Path): IAssemblyGenerator {
private val assemblyLines = mutableListOf<String>()

24
compiler/src/prog8/compiler/target/c64/codegen/ForLoopsAsmGen.kt
View File

@ -291,7 +291,7 @@ $endLabel""")
}
DataType.ARRAY_UB, DataType.ARRAY_B -> {
val length = decl.arraysize!!.size()!!
val indexVar = asmgen.makeLabel("for_index") // TODO allocate dynamically, zero page preferred if length >= 16
val indexVar = asmgen.makeLabel("for_index")
asmgen.out("""
ldy #0
$loopLabel sty $indexVar
@ -313,13 +313,19 @@ $loopLabel sty $indexVar
bne $loopLabel
beq $endLabel""")
}
if(length>=16 && asmgen.zeropage.available() > 0) {
// allocate index var on ZP if possible
val zpAddr = asmgen.zeropage.allocate(indexVar, DataType.UBYTE, stmt.position, asmgen.errors)
asmgen.out("""$indexVar = $zpAddr ; auto zp UBYTE""")
} else {
asmgen.out("""
$indexVar .byte 0
$endLabel""")
$indexVar .byte 0""")
}
asmgen.out(endLabel)
}
DataType.ARRAY_W, DataType.ARRAY_UW -> {
val length = decl.arraysize!!.size()!! * 2
val indexVar = asmgen.makeLabel("for_index") // todo allocate dynamically, zero page preferred if length >= 16
val indexVar = asmgen.makeLabel("for_index")
val loopvarName = asmgen.asmIdentifierName(stmt.loopVar)
asmgen.out("""
ldy #0
@ -346,9 +352,15 @@ $loopLabel sty $indexVar
bne $loopLabel
beq $endLabel""")
}
if(length>=16 && asmgen.zeropage.available() > 0) {
// allocate index var on ZP if possible
val zpAddr = asmgen.zeropage.allocate(indexVar, DataType.UBYTE, stmt.position, asmgen.errors)
asmgen.out("""$indexVar = $zpAddr ; auto zp UBYTE""")
} else {
asmgen.out("""
$indexVar .byte 0
$endLabel""")
$indexVar .byte 0""")
}
asmgen.out(endLabel)
}
DataType.ARRAY_F -> {
throw AssemblyError("for loop with floating point variables is not supported")