Implements int to double conversion instructions for MIPS simulator, assembler, disassembler.

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 423 matching lines @@
   }
 
   void clo(Register rd, Register rs) {
     EmitRType(SPECIAL2, rs, rd, rd, 0, CLO);
   }
 
   void clz(Register rd, Register rs) {
     EmitRType(SPECIAL2, rs, rd, rd, 0, CLZ);
   }
 
+  // Converts a 32-bit signed int in fs to a double in fd.
+  void cvtdw(FRegister fd, FRegister fs) {
+    ASSERT(EvenFPURegister(fd));
+    EmitFpuRType(COP1, FMT_W, F0, fs, fd, COP1_CVT_D);
+  }
+
+  // Converts a 64-bit signed int in fs to a double in fd.
+  void cvtdl(FRegister fd, FRegister fs) {
+    ASSERT(EvenFPURegister(fs));
+    ASSERT(EvenFPURegister(fd));
+    EmitFpuRType(COP1, FMT_L, F0, fs, fd, COP1_CVT_D);
+  }
+
   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);
@@ skipping 641 matching lines @@
                                   Register value,
                                   Label* no_update);
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_MIPS_H_