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package com.seaofnodes.simple.node;
import com.seaofnodes.simple.Parser;
import com.seaofnodes.simple.codegen.CodeGen;
import com.seaofnodes.simple.type.*;
import com.seaofnodes.simple.util.BAOS;
import com.seaofnodes.simple.util.Utils;
import java.util.HashMap;
import java.util.IdentityHashMap;
public class MinusNode extends Node implements ModeNode {
// Mode is 0 for unknown, 1 for int, 2 for flt
byte _mode;
public MinusNode(Node in) { super(null, in); }
public MinusNode(Node in, byte mode) { super(null, in); _mode = mode; }
@Override public void packed(BAOS baos, HashMap<String,Integer> strs, HashMap<Type,Integer> types, IdentityHashMap<Node,Integer> anodes) {
baos.packed1(_mode);
}
@Override public Tag serialTag() { return Tag.Minus; }
@Override public byte mode() { return _mode; }
@Override public Node setMode(byte mode) {
assert _mode==0 && (mode==1 || mode==2);
unlock(); // _mode participates in GVN hash and equality
_mode = mode;
return this;
}
@Override protected String format() { return "(-%1)"; }
@Override
public Type compute() {
Type t = in(1)._type;
if( t==null )
return Type.TOP;
if( t.isHigh() )
return _mode==0 ? Type.TOP :
_mode==1 ? TypeInteger.TOP :
t instanceof TypeFloat ? t : TypeFloat.F64.dual();
byte mode = _mode;
if( mode==0 ) {
if( t instanceof TypeFloat ) mode=2;
if( t instanceof TypeInteger ) mode=1;
}
if( mode==0 )
return CodeGen.CODE._phase.ordinal() < CodeGen.Phase.Opto.ordinal() ? Type.BOTTOM : Type.TOP;
if( mode==1 ) {
if( t instanceof TypeInteger i0 &&
i0._min != Long.MIN_VALUE && i0._max != Long.MIN_VALUE )
return TypeInteger.make(-i0._max,-i0._min,i0._widen);
return TypeInteger.BOT;
}
if( t instanceof TypeFloat f )
return f.isConstant() ? TypeFloat.constant(-f.value()) : f;
return TypeFloat.F64;
}
@Override
public Node idealize() {
// -(-x) is x
if( in(1) instanceof MinusNode minus && addDep(minus.in(1))._type.isa(compute()) )
return minus.in(1);
// Can we decide int vs flt?
if( _mode==0 ) {
byte mode = (byte)(
in(1)._type instanceof TypeInteger ? 1 :
in(1)._type instanceof TypeFloat ? 2 : 0);
if( mode!=0 ) return setMode(mode).init();
}
return null;
}
@Override public Parser.ParseException err() {
return ArithNode.nodeErr(this,null,"-",_mode,true);
}
@Override public boolean eq( Node n ) { return _mode==((MinusNode)n)._mode; }
@Override public int hash() { return _mode; }
}
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