kopia lustrzana https://github.com/maccasoft/z80-tools
49 wiersze
1.5 KiB
Java
49 wiersze
1.5 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 Bit extends InstructionFactory {
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@Override
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public InstructionObject createObject(Scope context, Expression arguments) {
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if (Bit_N_R.ARGUMENTS.check(arguments)) {
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return new Bit_N_R(context, arguments.getElement(0), 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 Bit_N_R extends InstructionObject {
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public static Schema ARGUMENTS = new Schema(Schema.DIRECT_N, Schema.DIRECT_R_INDIRECT_HL_IX_IY);
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private Expression argument1;
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private Expression argument2;
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public Bit_N_R(Scope context, Expression argument1, Expression argument2) {
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super(context);
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this.argument1 = argument1;
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this.argument2 = argument2;
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}
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@Override
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public int getSize() {
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return indexifyIndirect(argument2.getRegister(), 2);
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}
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@Override
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public byte[] getBytes() {
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int value = argument1.getInteger();
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if (value < 0 || value > 7) {
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throw new ArgumentException();
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}
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Register register = argument2.getRegister();
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return indexifyOnlyIndirect(register, (byte) 0xCB, (byte) (0x40 | value << 3 | register.get8BitCode()));
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}
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}
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}
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