Example usage for org.objectweb.asm.commons GeneratorAdapter dup2

Introduction

In this page you can find the example usage for org.objectweb.asm.commons GeneratorAdapter dup2.

Prototype

public void dup2() 

Source Link

Document

Generates a DUP2 instruction.

Usage

From source file:com.changingbits.Builder.java

License:Apache License

private void buildCounterAsm(GeneratorAdapter gen, Node node, boolean sawOutputs) {

    sawOutputs |= node.outputs != null;//ww  w .  j  a  v  a2 s.  c  o m

    if (node.left != null) {
        assert node.left.end + 1 == node.right.start;
        // Recurse on either left or right
        Label labelLeft = new Label();
        Label labelEnd = new Label();
        gen.loadArg(0);
        gen.push(node.left.end);

        gen.ifCmp(Type.LONG_TYPE, GeneratorAdapter.LE, labelLeft);
        buildCounterAsm(gen, node.right, sawOutputs);
        gen.goTo(labelEnd);
        gen.visitLabel(labelLeft);
        buildCounterAsm(gen, node.left, sawOutputs);
        gen.visitLabel(labelEnd);
    } else if (sawOutputs) {
        // leaf: elementaryCounts[node.leafIndex]++
        gen.loadThis();
        gen.getField(BASE_LONG_RANGE_COUNTER_TYPE, "elementaryCounts", INT_ARRAY_TYPE);
        gen.push(node.leafIndex);
        gen.dup2();
        gen.arrayLoad(Type.INT_TYPE);
        gen.push(1);
        gen.visitInsn(Opcodes.IADD);
        gen.arrayStore(Type.INT_TYPE);
    }
}

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From source file:io.datakernel.codegen.ExpressionHash.java

License:Apache License

@Override
public Type load(Context ctx) {
    GeneratorAdapter g = ctx.getGeneratorAdapter();

    int resultVar = g.newLocal(INT_TYPE);

    boolean firstIteration = true;

    for (Expression argument : this.arguments) {
        if (firstIteration) {
            g.push(0);//w w w.j  a  v a2s .  c  o m
            firstIteration = false;
        } else {
            g.push(31);
            g.loadLocal(resultVar);
            g.math(IMUL, INT_TYPE);
        }

        Type fieldType = argument.load(ctx);

        if (isPrimitiveType(fieldType)) {
            if (fieldType.getSort() == Type.LONG) {
                g.dup2();
                g.push(32);
                g.visitInsn(LUSHR);
                g.visitInsn(LXOR);
                g.visitInsn(L2I);
            }
            if (fieldType.getSort() == Type.FLOAT) {
                g.invokeStatic(getType(Float.class), getMethod("int floatToRawIntBits (float)"));
            }
            if (fieldType.getSort() == Type.DOUBLE) {
                g.invokeStatic(getType(Double.class), getMethod("long doubleToRawLongBits (double)"));
                g.dup2();
                g.push(32);
                g.visitInsn(LUSHR);
                g.visitInsn(LXOR);
                g.visitInsn(L2I);
            }
            g.visitInsn(IADD);
        } else {
            int tmpVar = g.newLocal(fieldType);
            g.storeLocal(tmpVar);
            g.loadLocal(tmpVar);
            Label ifNullLabel = g.newLabel();
            g.ifNull(ifNullLabel);
            g.loadLocal(tmpVar);
            g.invokeVirtual(fieldType, getMethod("int hashCode()"));
            g.visitInsn(IADD);
            g.mark(ifNullLabel);
        }

        g.storeLocal(resultVar);
    }

    if (firstIteration) {
        g.push(0);
    } else {
        g.loadLocal(resultVar);
    }

    return INT_TYPE;
}

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