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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 DDivTransformer implements InstructionsTransformer { |
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private static final String DIVIDE_METHOD = "divide"; |
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private static final String RECIPROCAL_METHOD = "reciprocal"; |
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private static final String MULTIPLY_METHOD = "multiply"; |
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private final boolean stack0Converted; |
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private final boolean stack1Converted; |
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53 | 4 | public DDivTransformer(final boolean stack0Converted, final boolean stack1Converted) { |
54 | 4 | this.stack0Converted = stack0Converted; |
55 | 4 | this.stack1Converted = stack1Converted; |
56 | 4 | } |
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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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63 | 4 | final InsnList list = new InsnList(); |
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65 | 4 | if (stack1Converted) { |
66 | 2 | if (stack0Converted) { |
67 | 1 | list.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, DS_TYPE.getInternalName(), |
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DIVIDE_METHOD, |
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Type.getMethodDescriptor(DS_TYPE, DS_TYPE))); |
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} else { |
71 | 1 | list.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, DS_TYPE.getInternalName(), |
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DIVIDE_METHOD, |
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Type.getMethodDescriptor(DS_TYPE, Type.DOUBLE_TYPE))); |
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} |
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} else { |
76 | 2 | list.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, DS_TYPE.getInternalName(), |
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RECIPROCAL_METHOD, |
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Type.getMethodDescriptor(DS_TYPE))); |
79 | 2 | list.add(new InsnNode(Opcodes.DUP_X2)); |
80 | 2 | list.add(new InsnNode(Opcodes.POP)); |
81 | 2 | list.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, DS_TYPE.getInternalName(), |
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MULTIPLY_METHOD, |
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Type.getMethodDescriptor(DS_TYPE, Type.DOUBLE_TYPE))); |
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} |
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86 | 4 | return list; |
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} |
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} |