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assigning string result from subroutine

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This commit is contained in:
Irmen de Jong 2020-10-30 22:22:06 +01:00
parent 8a6ef17fbf
commit 99f7d469f4
3 changed files with 39 additions and 65 deletions
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9
compiler/src/prog8/compiler/target/c64/codegen/AsmGen.kt
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@ -22,6 +22,7 @@ import prog8.compiler.target.c64.codegen.assignment.TargetStorageKind
import prog8.compiler.target.generatedLabelPrefix
import prog8.functions.BuiltinFunctions
import prog8.functions.FSignature
import java.io.CharConversionException
import java.nio.file.Path
import java.time.LocalDate
import java.time.LocalDateTime
@ -231,8 +232,12 @@ internal class AsmGen(private val program: Program,
}
private fun encode(str: String, altEncoding: Boolean): List<Short> {
val bytes = if(altEncoding) Petscii.encodeScreencode(str, true) else Petscii.encodePetscii(str, true)
return bytes.plus(0)
try {
val bytes = if (altEncoding) Petscii.encodeScreencode(str, true) else Petscii.encodePetscii(str, true)
return bytes.plus(0)
} catch(x: CharConversionException) {
throw AssemblyError("There was a problem converting a string to the target machine's char encoding: ${x.message}")
}
}
private fun zeropagevars2asm(statements: List<Statement>) {

21
compiler/src/prog8/compiler/target/c64/codegen/assignment/AssignmentAsmGen.kt
View File

@ -132,7 +132,24 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
asmgen.translateFunctionCall(value, preserveStatusRegisterAfterCall)
val returnValue = sub.returntypes.zip(sub.asmReturnvaluesRegisters).single { it.second.registerOrPair!=null }
if(returnValue.first==DataType.STR) {
TODO("assignment of string => copy string ${assign.position}")
when(assign.target.datatype) {
DataType.UWORD -> {
// assign the address of the string result value
assignRegisterpairWord(assign.target, RegisterOrPair.AY)
}
DataType.STR, DataType.ARRAY_UB, DataType.ARRAY_B -> {
// copy the actual string result into the target string variable
asmgen.out("""
pha
lda #<${assign.target.asmVarname}
sta P8ZP_SCRATCH_W1
lda #>${assign.target.asmVarname}
sta P8ZP_SCRATCH_W1+1
pla
jsr prog8_lib.strcpy""")
}
else -> throw AssemblyError("weird target dt")
}
} else {
when (returnValue.second.registerOrPair) {
RegisterOrPair.A -> assignRegisterByte(assign.target, CpuRegister.A)
@ -156,7 +173,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
when(returntype.typeOrElse(DataType.STRUCT)) {
in ByteDatatypes -> assignRegisterByte(assign.target, CpuRegister.A) // function's byte result is in A
in WordDatatypes -> assignRegisterpairWord(assign.target, RegisterOrPair.AY) // function's word result is in AY
DataType.STR -> TODO("assign string => copy string")
DataType.STR -> TODO("assign string => copy string or assign string address")
DataType.FLOAT -> TODO("assign float result from ${sub.name}")
else -> throw AssemblyError("weird result type")
}

74
examples/test.p8
View File

@ -7,73 +7,26 @@
; Note: this program is compatible with C64 and CX16.
main {
sub start() {
uword ss
ss = %1000000110101010
ss <<= 8
txt.print_uwbin(ss, 1)
txt.chrout('\n')
ss = %1000000110101111
ss <<= 9
txt.print_uwbin(ss, 1)
txt.chrout('\n')
ss = %1000000110101111
ss <<= 14
txt.print_uwbin(ss, 1)
txt.chrout('\n')
ss = %1000000110101111
ss <<= 15
txt.print_uwbin(ss, 1)
txt.chrout('\n')
ss = %1000000110101111
ss <<= 16
txt.print_uwbin(ss, 1)
txt.chrout('\n')
ss = %1000000110101010
ss <<= 17
txt.print_uwbin(ss, 1)
txt.chrout('\n')
main22.testX()
}
}
main22 {
sub start() {
ubyte char
uword ssss
float fl
str string1 = "abcdef"
str string2 = "%=&"
uword sa
;char = 1+(lsb(ssss) * 2)
;fl = 2.0*(abs(fl) + 1.0)
char = abs(char)
char = lsb(ssss)
char++
char = msb(ssss)
char++
char = c64.CHRIN()
txt.print_ub(char)
txt.print(string1)
txt.chrout('\n')
char = chrin()
txt.print_ub(char)
string1=string2
txt.print(string1)
txt.chrout('\n')
void getstr()
; TODO string assign ssss = getstr()
txt.print_uwhex(ssss, true)
sa = getstr()
txt.print_uwhex(sa, true)
txt.chrout('\n')
string1 = getstr()
txt.print(string1)
txt.chrout('\n')
; fl = getfloat()
@ -82,7 +35,6 @@ main22 {
; txt.chrout('\n')
testX()
;char=strlen(ssss)
}
sub chrin() -> ubyte {
@ -91,7 +43,7 @@ main22 {
sub getstr() -> str {
@($d020)++
return "foo"
return "foobar"
}
; sub getfloat() -> float {