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fix bit shifting words by 8. fix type error for signed return types.

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This commit is contained in:
Irmen de Jong 2021-01-07 22:49:54 +01:00
parent 58f37513e7
commit 9d9ca0f08d
4 changed files with 17 additions and 14 deletions
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6
compiler/res/prog8lib/prog8_lib.p8
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@ -6,8 +6,10 @@ prog8_lib {
%asminclude "library:prog8_lib.asm", ""
%asminclude "library:prog8_funcs.asm", ""
uword @zp retval_interm_w ; to store intermediary expression results for return values (hopefully allocated on ZP to reduce code size)
ubyte @zp retval_interm_b ; to store intermediary expression results for return values (hopefully allocated on ZP to reduce code size)
uword @zp retval_interm_uw ; to store intermediary expression results for return values (hopefully allocated on ZP to reduce code size)
word @zp retval_interm_w ; to store intermediary expression results for return values (hopefully allocated on ZP to reduce code size)
ubyte @zp retval_interm_ub ; to store intermediary expression results for return values (hopefully allocated on ZP to reduce code size)
byte @zp retval_interm_b ; to store intermediary expression results for return values (hopefully allocated on ZP to reduce code size)
asmsub pattern_match(str string @AY, str pattern @R0) clobbers(Y) -> ubyte @A {
%asm {{

9
compiler/src/prog8/optimizer/ExpressionSimplifier.kt
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@ -669,12 +669,15 @@ internal class ExpressionSimplifier(private val program: Program) : AstWalker()
DataType.UWORD -> {
if (amount >= 16) {
return NumericLiteralValue.optimalInteger(0, expr.position)
} else if (amount >= 8) {
}
else if (amount >= 8) {
val msb = FunctionCall(IdentifierReference(listOf("msb"), expr.position), mutableListOf(expr.left), expr.position)
if (amount == 8) {
return TypecastExpression(msb, DataType.UWORD, true, expr.position)
// mkword(0, msb(v))
val zero = NumericLiteralValue(DataType.UBYTE, 0, expr.position)
return FunctionCall(IdentifierReference(listOf("mkword"), expr.position), mutableListOf(zero, msb), expr.position)
}
return BinaryExpression(msb, ">>", NumericLiteralValue.optimalInteger(amount - 8, expr.position), expr.position)
return TypecastExpression(BinaryExpression(msb, ">>", NumericLiteralValue.optimalInteger(amount - 8, expr.position), expr.position), DataType.UWORD, true, expr.position)
}
}
DataType.WORD -> {

11
compiler/src/prog8/optimizer/StatementOptimizer.kt
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@ -447,10 +447,13 @@ internal class StatementOptimizer(private val program: Program,
if (returnDt in IntegerDatatypes) {
// first assign to intermediary, then return that register
val returnValueIntermediary =
if (returnDt in ByteDatatypes)
IdentifierReference(listOf("prog8_lib", "retval_interm_b"), returnStmt.position)
else
IdentifierReference(listOf("prog8_lib", "retval_interm_w"), returnStmt.position)
when(returnDt) {
DataType.UBYTE -> IdentifierReference(listOf("prog8_lib", "retval_interm_ub"), returnStmt.position)
DataType.BYTE -> IdentifierReference(listOf("prog8_lib", "retval_interm_b"), returnStmt.position)
DataType.UWORD -> IdentifierReference(listOf("prog8_lib", "retval_interm_uw"), returnStmt.position)
DataType.WORD -> IdentifierReference(listOf("prog8_lib", "retval_interm_w"), returnStmt.position)
else -> throw FatalAstException("weird return dt")
}
val tgt = AssignTarget(returnValueIntermediary, null, null, returnStmt.position)
val assign = Assignment(tgt, value, returnStmt.position)
val returnReplacement = Return(returnValueIntermediary, returnStmt.position)

5
examples/arithmetic/bitshift.p8
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@ -474,11 +474,6 @@ main {
return (q >> 17)
}
; @TODO fix type errors
sub shiftrsw0() -> word {
word q = -12345
return q >> 0