Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.scl.compiler / src / org / simantics / scl / compiler / constants / JavaComparisonToZeroOperation.java

diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/constants/JavaComparisonToZeroOperation.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/constants/JavaComparisonToZeroOperation.java
new file mode 100644 (file)
index 0000000..e5a58bb
--- /dev/null
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/constants/JavaComparisonToZeroOperation.java
@@ -0,0 +1,42 @@
+package org.simantics.scl.compiler.constants;
+
+import org.objectweb.asm.Label;
+import org.simantics.scl.compiler.internal.codegen.references.Val;
+import org.simantics.scl.compiler.internal.codegen.utils.MethodBuilder;
+import org.simantics.scl.compiler.types.TVar;
+import org.simantics.scl.compiler.types.Type;
+import org.simantics.scl.compiler.types.Types;
+
+public class JavaComparisonToZeroOperation extends FunctionValue {
+    
+    String op;
+    
+    public JavaComparisonToZeroOperation(String op) {
+        super(TVar.EMPTY_ARRAY, Types.NO_EFFECTS, Types.BOOLEAN, Types.INTEGER);
+        this.op = op;
+    }
+
+    @Override
+    public Type applyExact(MethodBuilder mb, Val[] parameters) {
+        Label thenBranch = mb.createLabel();
+        Label joinPoint = mb.createLabel();
+        
+        mb.push(parameters[0], Types.INTEGER);        
+        mb.ifZeroComparisonBranch(thenBranch, op);
+        
+        mb.loadConstant(false);
+        mb.branch(joinPoint);
+        
+        mb.setLocation(thenBranch);
+        mb.loadConstant(true);
+        mb.setLocation(joinPoint);
+        
+        return getReturnType();
+    }
+    
+    @Override
+    public String toString() {
+        return op;
+    }
+
+}