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fix return type error for asmsubs with >1 result values

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This commit is contained in:
Irmen de Jong 2022-04-01 22:30:15 +02:00
parent 156cf7315c
commit 20d06d9f9d
2 changed files with 44 additions and 24 deletions
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18
compilerAst/src/prog8/ast/expressions/AstExpressions.kt
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@ -985,9 +985,21 @@ class FunctionCallExpression(override var target: IdentifierReference,
return InferredTypes.knownFor(stmt.returntypes[0])
// multiple return values. Can occur for asmsub routines. If there is exactly one register return value, take that.
val numRegisterReturns = stmt.asmReturnvaluesRegisters.count { it.registerOrPair!=null }
if(numRegisterReturns==1)
return InferredTypes.InferredType.known(DataType.UBYTE)
val registerReturns = stmt.asmReturnvaluesRegisters.filter {it.registerOrPair != null }
if(registerReturns.size==1) {
val reg = registerReturns.single().registerOrPair!!
return when(reg) {
RegisterOrPair.A,
RegisterOrPair.X,
RegisterOrPair.Y -> InferredTypes.InferredType.known(DataType.UBYTE)
RegisterOrPair.AX,
RegisterOrPair.AY,
RegisterOrPair.XY, in Cx16VirtualRegisters -> InferredTypes.InferredType.known(DataType.UWORD)
RegisterOrPair.FAC1,
RegisterOrPair.FAC2 -> InferredTypes.InferredType.known(DataType.FLOAT)
else -> throw FatalAstException("weird reg")
}
}
return InferredTypes.unknown() // has multiple return types... so not a single resulting datatype possible
}

50
examples/test.p8
View File

@ -7,27 +7,35 @@ main {
sub start() {
txt.print("keyboard api test\n")
cx16.kbdbuf_put('l')
cx16.kbdbuf_put('o')
cx16.kbdbuf_put('a')
cx16.kbdbuf_put('d')
cx16.kbdbuf_put(13)
; the "pixelshader":
syscall1(8, 0) ; enable lo res creen
ubyte shifter
shifter >>= 1
repeat {
uword xx
uword yy = 0
repeat 240 {
xx = 0
repeat 320 {
syscall3(10, xx, yy, xx*yy + shifter) ; plot pixel
xx++
}
yy++
}
shifter+=4
txt.print_ub(shifter)
txt.nl()
}
; syscall1(8, 0) ; enable lo res creen
; ubyte shifter
;
; shifter >>= 1
;
; repeat {
; uword xx
; uword yy = 0
; repeat 240 {
; xx = 0
; repeat 320 {
; syscall3(10, xx, yy, xx*yy + shifter) ; plot pixel
; xx++
; }
; yy++
; }
; shifter+=4
;
; txt.print_ub(shifter)
; txt.nl()
; }
}
}