kopia lustrzana https://github.com/maccasoft/z80-tools
76 wiersze
2.0 KiB
Java
76 wiersze
2.0 KiB
Java
package nl.grauw.glass.instructions;
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import nl.grauw.glass.Scope;
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import nl.grauw.glass.expressions.Expression;
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import nl.grauw.glass.expressions.Register;
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import nl.grauw.glass.expressions.Schema;
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public class In extends InstructionFactory {
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@Override
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public InstructionObject createObject(Scope context, Expression arguments) {
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if (In_N_C.ARGUMENTS.check(arguments)) {
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return new In_N_C(context, arguments.getElement(0));
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}
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if (In_N_C.ARGUMENTS_NO_R.check(arguments)) {
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return new In_N_C(context, Register.HL);
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}
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if (In_N_N.ARGUMENTS.check(arguments)) {
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return new In_N_N(context, arguments.getElement(1));
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}
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throw new ArgumentException();
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}
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public static class In_N_C extends InstructionObject {
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public static Schema ARGUMENTS = new Schema(Schema.DIRECT_R, Schema.INDIRECT_C);
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public static Schema ARGUMENTS_NO_R = new Schema(Schema.INDIRECT_C);
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private Expression argument;
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public In_N_C(Scope context, Expression arguments) {
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super(context);
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this.argument = arguments;
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}
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@Override
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public int getSize() {
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return 2;
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}
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@Override
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public byte[] getBytes() {
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return new byte[] {
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(byte) 0xED, (byte) (0x40 | argument.getRegister().get8BitCode() << 3)
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};
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}
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}
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public static class In_N_N extends InstructionObject {
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public static Schema ARGUMENTS = new Schema(Schema.DIRECT_A, Schema.INDIRECT_N);
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private Expression argument;
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public In_N_N(Scope context, Expression arguments) {
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super(context);
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this.argument = arguments;
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}
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@Override
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public int getSize() {
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return 2;
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}
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@Override
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public byte[] getBytes() {
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return new byte[] {
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(byte) 0xDB, (byte) argument.getInteger()
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};
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}
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}
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}
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