Adds MIPS SPECIAL instructions to simulator, assembler, debugger.

runtime/vm/assembler_mips.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_ASSEMBLER_MIPS_H_
 #define VM_ASSEMBLER_MIPS_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_mips.h directly; use assembler.h instead.
 #endif
@@ skipping 206 matching lines @@
   Assembler* delay_slot() {
     ASSERT(delay_slot_available_);
     ASSERT(buffer_.Load<int32_t>(buffer_.GetPosition() - sizeof(int32_t)) ==
         Instr::kNopInstruction);
     buffer_.Remit<int32_t>();
     delay_slot_available_ = false;
     in_delay_slot_ = true;
     return this;
   }
 
-  // CPU instructions.
+  // CPU instructions in alphabetical order.
   void addiu(Register rt, Register rs, const Immediate& imm) {
     ASSERT(Utils::IsInt(16, imm.value()));
     uint16_t imm_value = static_cast<uint16_t>(imm.value());
     EmitIType(ADDIU, rs, rt, imm_value);
   }
 
   void addu(Register rd, Register rs, Register rt) {
     EmitRType(SPECIAL, rs, rt, rd, 0, ADDU);
   }
 
@@ skipping 23 matching lines @@
   }
 
   void div(Register rs, Register rt) {
     EmitRType(SPECIAL, rs, rt, R0, 0, DIV);
   }
 
   void divu(Register rs, Register rt) {
     EmitRType(SPECIAL, rs, rt, R0, 0, DIVU);
   }
 
+  void jalr(Register rs, Register rd = RA) {
+    ASSERT(rs != rd);
+    ASSERT(!in_delay_slot_);  // Jump within a delay slot is not supported.
+    EmitRType(SPECIAL, rs, R0, rd, 0, JALR);
+    EmitBranchDelayNop();
+  }
+
+  void jr(Register rs) {
+    ASSERT(!in_delay_slot_);  // Jump within a delay slot is not supported.
+    EmitRType(SPECIAL, rs, R0, R0, 0, JR);
+    EmitBranchDelayNop();
+  }
 
   void lb(Register rt, const Address& addr) {
     EmitLoadStore(LB, rt, addr);
   }
 
   void lbu(Register rt, const Address& addr) {
     EmitLoadStore(LBU, rt, addr);
   }
 
   void lh(Register rt, const Address& addr) {
@@ skipping 15 matching lines @@
   }
 
   void mfhi(Register rd) {
     EmitRType(SPECIAL, R0, R0, rd, 0, MFHI);
   }
 
   void mflo(Register rd) {
     EmitRType(SPECIAL, R0, R0, rd, 0, MFLO);
   }
 
+  void movn(Register rd, Register rs, Register rt) {
+    EmitRType(SPECIAL, rs, rt, rd, 0, MOVN);
+  }
+
+  void movz(Register rd, Register rs, Register rt) {
+    EmitRType(SPECIAL, rs, rt, rd, 0, MOVZ);
+  }
+
+  void mult(Register rs, Register rt) {
+    EmitRType(SPECIAL, rs, rt, R0, 0, MULT);
+  }
+
+  void multu(Register rs, Register rt) {
+    EmitRType(SPECIAL, rs, rt, R0, 0, MULTU);
+  }
+
+  void nor(Register rd, Register rs, Register rt) {
+    EmitRType(SPECIAL, rs, rt, rd, 0, NOR);
+  }
+
+  void or_(Register rd, Register rs, Register rt) {
+    EmitRType(SPECIAL, rs, rt, rd, 0, OR);
+  }
+
   void ori(Register rt, Register rs, const Immediate& imm) {
     ASSERT(Utils::IsUint(16, imm.value()));
     uint16_t imm_value = static_cast<uint16_t>(imm.value());
     EmitIType(ORI, rs, rt, imm_value);
   }
 
-  void jr(Register rs) {
-    ASSERT(!in_delay_slot_);  // Jump within a delay slot is not supported.
-    EmitRType(SPECIAL, rs, R0, R0, 0, JR);
-    Emit(Instr::kNopInstruction);  // Branch delay NOP.
-    delay_slot_available_ = true;
-  }
-
   void sb(Register rt, const Address& addr) {
     EmitLoadStore(SB, rt, addr);
   }
 
   void sh(Register rt, const Address& addr) {
     EmitLoadStore(SH, rt, addr);
   }
 
+  void sll(Register rd, Register rt, int sa) {
+    EmitRType(SPECIAL, R0, rt, rd, sa, SLL);
+  }
+
+  void sllv(Register rd, Register rt, Register rs) {
+    EmitRType(SPECIAL, rs, rt, rd, 0, SLLV);
+  }
+
+  void slt(Register rd, Register rs, Register rt) {
+    EmitRType(SPECIAL, rs, rt, rd, 0, SLT);
+  }
+
+  void sltu(Register rd, Register rs, Register rt) {
+    EmitRType(SPECIAL, rs, rt, rd, 0, SLTU);
+  }
+
+  void sra(Register rd, Register rt, int sa) {
+    EmitRType(SPECIAL, R0, rt, rd, sa, SRA);
+  }
+
+  void srav(Register rd, Register rt, Register rs) {
+    EmitRType(SPECIAL, rs, rt, rd, 0, SRAV);
+  }
+
+  void srl(Register rd, Register rt, int sa) {
+    EmitRType(SPECIAL, R0, rt, rd, sa, SRL);
+  }
+
+  void srlv(Register rd, Register rt, Register rs) {
+    EmitRType(SPECIAL, rs, rt, rd, 0, SRLV);
+  }
+
+  void sub(Register rd, Register rs, Register rt) {
+    EmitRType(SPECIAL, rs, rt, rd, 0, SUB);
+  }
+
+  void subu(Register rd, Register rs, Register rt) {
+    EmitRType(SPECIAL, rs, rt, rd, 0, SUBU);
+  }
+
   void sw(Register rt, const Address& addr) {
     EmitLoadStore(SW, rt, addr);
   }
 
-  void sll(Register rd, Register rt, int sa) {
-    EmitRType(SPECIAL, R0, rt, rd, sa, SLL);
+  void xor_(Register rd, Register rs, Register rt) {
+    EmitRType(SPECIAL, rs, rt, rd, 0, XOR);
   }
 
-  // Macros.
+  // Macros in alphabetical order.
   void LoadImmediate(Register rd, int32_t value) {
-    lui(rd, Immediate((value >> 16) & 0xffff));
-    ori(rd, rd, Immediate(value & 0xffff));
+    if (Utils::IsInt(16, value)) {
+      addiu(rd, ZR, Immediate(value));
+    } else {
+      lui(rd, Immediate((value >> 16) & 0xffff));
+      ori(rd, rd, Immediate(value & 0xffff));
+    }
+  }
+
+  void Move(Register rd, Register rs) {
+    or_(rd, rs, ZR);
   }
 
  private:
   AssemblerBuffer buffer_;
   GrowableObjectArray& object_pool_;  // Objects and patchable jump targets.
   int prologue_offset_;
 
   bool delay_slot_available_;
   bool in_delay_slot_;
 
@@ skipping 63 matching lines @@
                  SpecialFunction func) {
     ASSERT(Utils::IsUint(5, sa));
     Emit(opcode << kOpcodeShift |
          rs << kRsShift |
          rt << kRtShift |
          rd << kRdShift |
          sa << kSaShift |
          func << kFunctionShift);
   }
 
+  void EmitBranchDelayNop() {
+    Emit(Instr::kNopInstruction);  // Branch delay NOP.
+    delay_slot_available_ = true;
+  }
+
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_MIPS_H_