mips without optimize

backend/mips/instr/MipsAlu.java

@@ -0,0 +1,39 @@
+package backend.mips.instr;
+
+import backend.mips.Register;
+import backend.mips.instr.type.MipsAluType;
+import backend.mips.instr.type.MipsType;
+
+public class MipsAlu extends MipsInstr {
+    private MipsAluType aluType;
+    private Register rd;
+    private Register rs;
+    private Register rt;
+    private int immediate;
+    private boolean isImInstr;
+
+    public MipsAlu(MipsAluType aluType, Register rd, Register rs, Register rt) {
+        super(MipsType.ALU);
+        this.aluType = aluType;
+        this.rd = rd;
+        this.rs = rs;
+        this.rt = rt;
+        this.immediate = 0;
+        this.isImInstr = false;
+    }
+
+    public MipsAlu(MipsAluType aluType, Register rd, Register rs, int immediate) {
+        super(MipsType.ALU);
+        this.aluType = aluType;
+        this.rd = rd;
+        this.rs = rs;
+        this.rt = null;
+        this.immediate = immediate;
+        this.isImInstr = true;
+    }
+
+    public String toString() {
+        return isImInstr ? aluType.toString() + " " + rd + ", " + rs + ", " + immediate + "\n"
+                : aluType.toString() + " " + rd + ", " + rs + ", " + rt + "\n";
+    }
+}