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package org.apache.commons.nabla.forward.arithmetic; |
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import org.apache.commons.nabla.DifferentiationException; |
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import org.apache.commons.nabla.forward.analysis.InstructionsTransformer; |
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import org.apache.commons.nabla.forward.analysis.MethodDifferentiator; |
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import org.objectweb.asm.Opcodes; |
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import org.objectweb.asm.Type; |
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import org.objectweb.asm.tree.AbstractInsnNode; |
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import org.objectweb.asm.tree.InsnList; |
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import org.objectweb.asm.tree.InsnNode; |
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import org.objectweb.asm.tree.MethodInsnNode; |
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public class DSubTransformer implements InstructionsTransformer { |
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private static final String SUBTRACT_METHOD = "subtract"; |
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private static final String NEGATE_METHOD = "negate"; |
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private final boolean stack0Converted; |
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private final boolean stack1Converted; |
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50 | 5 | public DSubTransformer(final boolean stack0Converted, final boolean stack1Converted) { |
51 | 5 | this.stack0Converted = stack0Converted; |
52 | 5 | this.stack1Converted = stack1Converted; |
53 | 5 | } |
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public InsnList getReplacement(final AbstractInsnNode insn, |
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final MethodDifferentiator methodDifferentiator) |
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throws DifferentiationException { |
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60 | 5 | final InsnList list = new InsnList(); |
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62 | 5 | if (stack1Converted) { |
63 | 4 | if (stack0Converted) { |
64 | 1 | list.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, DS_TYPE.getInternalName(), |
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SUBTRACT_METHOD, |
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Type.getMethodDescriptor(DS_TYPE, DS_TYPE))); |
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} else { |
68 | 3 | list.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, DS_TYPE.getInternalName(), |
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SUBTRACT_METHOD, |
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Type.getMethodDescriptor(DS_TYPE, Type.DOUBLE_TYPE))); |
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} |
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} else { |
73 | 1 | list.add(new InsnNode(Opcodes.DUP_X2)); |
74 | 1 | list.add(new InsnNode(Opcodes.POP)); |
75 | 1 | list.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, DS_TYPE.getInternalName(), |
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SUBTRACT_METHOD, |
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Type.getMethodDescriptor(DS_TYPE, Type.DOUBLE_TYPE))); |
78 | 1 | list.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, DS_TYPE.getInternalName(), |
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NEGATE_METHOD, |
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Type.getMethodDescriptor(DS_TYPE))); |
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} |
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83 | 5 | return list; |
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} |
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} |