Apple-2-SW/prog8
1
0
Fork 0
mirror of https://github.com/irmen/prog8.git synced 2024-12-25 08:29:25 +00:00
Code Issues Projects Releases Wiki Activity

reworked program init logic so that it is included as the first thing inside main.start itself, to allow better stand alone asm

Browse Source
This commit is contained in:
Irmen de Jong 2020-09-23 22:29:21 +02:00
parent c50cbbb526
commit 2b9316c4ff
7 changed files with 84 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
compiler/res/prog8lib/c64/syslib.p8
View File

@ -270,6 +270,17 @@ asmsub reset_system() {
}}
}
asmsub disable_runstop_and_charsetswitch() {
%asm {{
lda #$80
lda #$80
sta 657 ; disable charset switching
lda #239
sta 808 ; disable run/stop key
rts
}}
}
asmsub set_irqvec_excl() clobbers(A) {
%asm {{
sei

2
compiler/res/version.txt
View File

@ -1 +1 @@
4.3
4.4-SNAPSHOT

10
compiler/src/prog8/compiler/BeforeAsmGenerationAstChanger.kt
View File

@ -8,6 +8,7 @@ import prog8.ast.expressions.*
import prog8.ast.processing.AstWalker
import prog8.ast.processing.IAstModification
import prog8.ast.statements.*
import prog8.compiler.target.c64.codegen.programInitializationRoutineName
internal class BeforeAsmGenerationAstChanger(val program: Program, val errors: ErrorReporter) : AstWalker() {
@ -107,6 +108,15 @@ internal class BeforeAsmGenerationAstChanger(val program: Program, val errors: E
mods += IAstModification.InsertAfter(outerStatements[subroutineStmtIdx - 1], returnStmt, outerScope as Node)
}
// if it's the program's start subroutine, insert a call to the initalization logic (if it's not there already)
if(subroutine.name=="start" && subroutine.definingBlock().name=="main") {
val first = subroutine.statements.firstOrNull() as? FunctionCallStatement
if(first==null || first.target.nameInSource != listOf(programInitializationRoutineName)) {
val call = FunctionCallStatement(IdentifierReference(listOf(programInitializationRoutineName), subroutine.position), mutableListOf(), true, subroutine.position)
mods += IAstModification.InsertFirst(call, subroutine)
}
}
return mods
}

3
compiler/src/prog8/compiler/target/CompilationTarget.kt
View File

@ -19,6 +19,7 @@ internal interface CompilationTarget {
fun asmGenerator(program: Program, errors: ErrorReporter, zp: Zeropage, options: CompilationOptions, path: Path): IAssemblyGenerator
val initProcName: String?
val resetProcName: String?
val disableRunStopProcName: String?
companion object {
lateinit var instance: CompilationTarget
@ -37,6 +38,7 @@ internal object C64Target: CompilationTarget {
AsmGen(program, errors, zp, options, path)
override val initProcName = "c64.init_system"
override val resetProcName = "c64.reset_system"
override val disableRunStopProcName = "c64.disable_runstop_and_charsetswitch"
}
internal object Cx16Target: CompilationTarget {
@ -50,4 +52,5 @@ internal object Cx16Target: CompilationTarget {
AsmGen(program, errors, zp, options, path)
override val initProcName = "cx16.init_system"
override val resetProcName = "cx16.reset_system"
override val disableRunStopProcName = null
}

93
compiler/src/prog8/compiler/target/c64/codegen/AsmGen.kt
View File

@ -29,6 +29,9 @@ import java.util.*
import kotlin.math.absoluteValue
internal const val programInitializationRoutineName = "prog8_initialize_program"
internal class AsmGen(private val program: Program,
val errors: ErrorReporter,
val zeropage: Zeropage,
@ -50,11 +53,13 @@ internal class AsmGen(private val program: Program,
private val assignmentAsmGen = AssignmentAsmGen(program, this)
private val expressionsAsmGen = ExpressionsAsmGen(program, this)
internal val loopEndLabels = ArrayDeque<String>()
internal val blockLevelVarInits = mutableMapOf<Block, MutableSet<VarDecl>>()
private val blockLevelVarInits = mutableMapOf<Block, MutableSet<VarDecl>>()
private val programInitLines = mutableListOf<String>()
override fun compileToAssembly(optimize: Boolean): IAssemblyProgram {
assemblyLines.clear()
loopEndLabels.clear()
programInitLines.clear()
println("Generating assembly code... ")
@ -81,6 +86,7 @@ internal class AsmGen(private val program: Program,
return AssemblyProgram(program.name, outputDir)
}
private fun header() {
val ourName = this.javaClass.name
val cpu = when(CompilationTarget.instance.machine.cpu) {
@ -120,16 +126,12 @@ internal class AsmGen(private val program: Program,
out(" .null $9e, format(' %d ', _prog8_entrypoint), $3a, $8f, ' prog8 by idj'")
out("+\t.word 0")
out("_prog8_entrypoint\t; assembly code starts here\n")
out(" tsx")
out(" stx prog8_lib.orig_stackpointer")
if(!CompilationTarget.instance.initProcName.isNullOrEmpty())
out(" jsr ${CompilationTarget.instance.initProcName}")
}
options.output == OutputType.PRG -> {
out("; ---- program without basic sys call ----")
out("* = ${program.actualLoadAddress.toHex()}\n")
out(" tsx")
out(" stx prog8_lib.orig_stackpointer")
if(!CompilationTarget.instance.initProcName.isNullOrEmpty())
out(" jsr ${CompilationTarget.instance.initProcName}")
}
@ -138,37 +140,49 @@ internal class AsmGen(private val program: Program,
out("* = ${program.actualLoadAddress.toHex()}\n")
}
}
out(" jmp main.start ; start program / force start proc to be included")
if (zeropage.exitProgramStrategy != Zeropage.ExitProgramStrategy.CLEAN_EXIT) {
// disable shift-commodore charset switching and run/stop key
out(" lda #$80")
out(" lda #$80")
out(" sta 657\t; disable charset switching")
out(" lda #239")
out(" sta 808\t; disable run/stop key")
if(!CompilationTarget.instance.disableRunStopProcName.isNullOrEmpty())
programInitLines.add(" jsr ${CompilationTarget.instance.disableRunStopProcName}")
}
out(" ldx #\$ff\t; init estack pointer")
out(" ; initialize the variables in each block that has globals")
programInitLines.add(" ; initialize the variables in each block that has globals")
programInitLines.add(" cld")
programInitLines.add(" clv")
program.allBlocks().forEach {
if(it.statements.filterIsInstance<VarDecl>().any { vd->vd.value!=null && vd.type==VarDeclType.VAR && vd.datatype in NumericDatatypes})
out(" jsr ${it.name}.prog8_init_vars")
programInitLines.add(" jsr ${it.name}.prog8_init_vars")
}
out(" clc")
when (zeropage.exitProgramStrategy) {
Zeropage.ExitProgramStrategy.CLEAN_EXIT -> {
out(" jmp main.start\t; jump to program entrypoint")
}
Zeropage.ExitProgramStrategy.SYSTEM_RESET -> {
out(" jsr main.start\t; call program entrypoint")
out(" jmp ${CompilationTarget.instance.resetProcName}")
}
if (zeropage.exitProgramStrategy == Zeropage.ExitProgramStrategy.SYSTEM_RESET) {
// push the reset routine onto the cpu stack so that it is executed when the program does an rts
programInitLines.addAll(listOf(
" tsx",
" lda $0102,x",
" pha",
" lda $0103,x",
" pha",
" lda #>(${CompilationTarget.instance.resetProcName}-1)",
" sta $0102,x",
" lda #<(${CompilationTarget.instance.resetProcName}-1)",
" sta $0103,x",
))
}
programInitLines.add(" ldx #\$ff\t; init estack pointer")
programInitLines.add(" rts")
}
private fun footer() {
// the program preamble or initialization code
out("")
out("; program initialization")
out(programInitializationRoutineName)
for(line in programInitLines) {
out(line)
}
out("")
// the global list of all floating point constants for the whole program
out("; global float constants")
for (flt in globalFloatConsts) {
@ -618,18 +632,25 @@ $save .byte 0
is InlineAssembly -> translate(stmt)
is FunctionCallStatement -> {
val functionName = stmt.target.nameInSource.last()
val builtinFunc = BuiltinFunctions[functionName]
if(builtinFunc!=null) {
builtinFunctionsAsmGen.translateFunctioncallStatement(stmt, builtinFunc)
if(functionName == programInitializationRoutineName) {
out("""
tsx
stx prog8_lib.orig_stackpointer
jsr $functionName""")
} else {
functioncallAsmGen.translateFunctionCall(stmt)
// discard any results from the stack:
val sub = stmt.target.targetSubroutine(program.namespace)!!
val returns = sub.returntypes.zip(sub.asmReturnvaluesRegisters)
for((t, reg) in returns) {
if(reg.stack) {
if (t in IntegerDatatypes || t in PassByReferenceDatatypes) out(" inx")
else if (t == DataType.FLOAT) out(" inx | inx | inx")
val builtinFunc = BuiltinFunctions[functionName]
if (builtinFunc != null) {
builtinFunctionsAsmGen.translateFunctioncallStatement(stmt, builtinFunc)
} else {
functioncallAsmGen.translateFunctionCall(stmt)
// discard any results from the stack:
val sub = stmt.target.targetSubroutine(program.namespace)!!
val returns = sub.returntypes.zip(sub.asmReturnvaluesRegisters)
for ((t, reg) in returns) {
if (reg.stack) {
if (t in IntegerDatatypes || t in PassByReferenceDatatypes) out(" inx")
else if (t == DataType.FLOAT) out(" inx | inx | inx")
}
}
}
}

3
docs/source/todo.rst
View File

@ -3,9 +3,8 @@ TODO
====
- get rid of all other TODO's in the code ;-)
- move the ldx #$ff | clc | cld from the startup logic into the start() function as first instructions
- add an %option that omits the 'system-init' code at the start. Useful to create separate standalone routines that shouldn't re-init the whole machine every time they're called
- line-circle-gfx examples are now a few hundred bytes larger than before. Why is that, can it be fixed?
- line-circle-gfx examples are now a few hundred bytes larger than before (~4.0/4.1 version i think?). Why is that, can it be fixed?
- until condition should be able to refer to variables defined IN the do-until block itself.
- add support? example? for processing arguments to a sys call : sys 999, 1, 2, "aaa"
- make it possible for array literals to not only contain compile time constants

3
examples/test.p8
View File

@ -4,10 +4,9 @@
%zeropage basicsafe
main {
main $0900{
sub start() {
ubyte v = 1
@($c000+v) = 10