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preparing for getClass() and hashCode() on array objects, WIP

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Volker Berlin 2020-06-21 13:48:06 +02:00
parent 1dcfc9e6a2
commit e4f90cae6f
1 changed files with 78 additions and 2 deletions
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80
src/de/inetsoftware/jwebassembly/module/WasmArrayInstruction.java
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@ -1,5 +1,5 @@
/* /*
Copyright 2018 - 2019 Volker Berlin (i-net software) Copyright 2018 - 2020 Volker Berlin (i-net software)
Licensed under the Apache License, Version 2.0 (the "License"); Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License. you may not use this file except in compliance with the License.
@ -22,8 +22,10 @@ import javax.annotation.Nonnull;
import javax.annotation.Nullable; import javax.annotation.Nullable;
import de.inetsoftware.jwebassembly.WasmException; import de.inetsoftware.jwebassembly.WasmException;
import de.inetsoftware.jwebassembly.wasm.ArrayOperator; import de.inetsoftware.jwebassembly.javascript.JavaScriptSyntheticFunctionName;
import de.inetsoftware.jwebassembly.wasm.AnyType; import de.inetsoftware.jwebassembly.wasm.AnyType;
import de.inetsoftware.jwebassembly.wasm.ArrayOperator;
import de.inetsoftware.jwebassembly.wasm.ArrayType;
import de.inetsoftware.jwebassembly.wasm.ValueType; import de.inetsoftware.jwebassembly.wasm.ValueType;
/** /**
@ -40,6 +42,8 @@ class WasmArrayInstruction extends WasmInstruction {
private final TypeManager types; private final TypeManager types;
private SyntheticFunctionName functionName;
/** /**
* Create an instance of an array operation. * Create an instance of an array operation.
* *
@ -59,6 +63,78 @@ class WasmArrayInstruction extends WasmInstruction {
this.types = types; this.types = types;
} }
/**
* Create the synthetic polyfill function of this instruction for nonGC mode.
*
* @return the function or null if not needed
*/
SyntheticFunctionName createNonGcFunction() {
// i8 and i16 are not valid in function signatures
AnyType functionType = type == ValueType.i8 || type == ValueType.i16 ? ValueType.i32 : type;
switch( op ) {
case NEW:
String cmd;
if( type.isRefType() ) {
cmd = "Object.seal(new Array(l).fill(null))";
} else {
switch( (ValueType)type ) {
case i8:
cmd = "new Uint8Array(l)";
break;
case i16:
cmd = "new Int16Array(l)";
break;
case i32:
cmd = "new Int32Array(l)";
break;
case i64:
cmd = "new BigInt64Array(l)";
break;
case f32:
cmd = "new Float32Array(l)";
break;
case f64:
cmd = "new Float64Array(l)";
break;
default:
cmd = "Object.seal(new Array(l).fill(null))";
}
}
ArrayType arrayType = types.arrayType( type );
functionName = new JavaScriptSyntheticFunctionName( "NonGC_", "array_new_" + validJsName( type ), () -> {
// create the default values of a new type
return new StringBuilder( "()=>Object.seal({0:" ) // fix count of elements
.append( arrayType.getClassIndex() ) // .vtable
.append( ",1:0,2:" ) // .hashCode
.append( cmd ) // the array data
.append( "})" ) //
.toString();
}, null, ValueType.externref );
break;
case GET:
functionName = new JavaScriptSyntheticFunctionName( "NonGC_", "array_get_" + validJsName( functionType ), () -> "(a,i)=>a[2][i]", ValueType.externref, ValueType.i32, null, functionType );
break;
case SET:
functionName = new JavaScriptSyntheticFunctionName( "NonGC_", "array_set_" + validJsName( functionType ), () -> "(a,v,i)=>a[2][i]=v", ValueType.externref, functionType, ValueType.i32, null, null );
break;
case LEN:
functionName = new JavaScriptSyntheticFunctionName( "NonGC_", "array_len", () -> "(a)=>a[2].length", ValueType.externref, null, ValueType.i32 );
break;
}
return functionName;
}
/**
* Get a valid JavaScript name.
*
* @param type
* the type
* @return the identifier that is valid
*/
private static String validJsName( AnyType type ) {
return type.isRefType() ? "obj" : type.toString();
}
/** /**
* {@inheritDoc} * {@inheritDoc}
*/ */