Use TRUNC.W instead of CVT.W on mips to convert from double to int as to not

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 567 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);
   }
 
+  // Convert a double in ds to a 32-bit signed int in fd rounding towards 0.
+  void truncwd(FRegister fd, DRegister ds) {
+    FRegister fs = static_cast<FRegister>(ds * 2);
+    EmitFpuRType(COP1, FMT_D, F0, fs, fd, COP1_TRUNC_W);
+  }
+
   // Convert a 32-bit float in fs to a 64-bit double in dd.
   void cvtds(DRegister dd, FRegister fs) {
     FRegister fd = static_cast<FRegister>(dd * 2);
     EmitFpuRType(COP1, FMT_S, F0, fs, fd, COP1_CVT_D);
   }
 
   // Converts a 32-bit signed int in fs to a double in fd.
   void cvtdw(DRegister dd, FRegister fs) {
     FRegister fd = static_cast<FRegister>(dd * 2);
     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(DRegister dd, DRegister ds) {
-    FRegister fs = static_cast<FRegister>(ds * 2);
-    FRegister fd = static_cast<FRegister>(dd * 2);
-    EmitFpuRType(COP1, FMT_L, F0, fs, fd, COP1_CVT_D);
-  }
-
+  // Convert a 64-bit double in ds to a 32-bit float in fd.
   void cvtsd(FRegister fd, DRegister ds) {
     FRegister fs = static_cast<FRegister>(ds * 2);
     EmitFpuRType(COP1, FMT_D, F0, fs, fd, COP1_CVT_S);
   }
 
-  void cvtwd(FRegister fd, DRegister ds) {
-    FRegister fs = static_cast<FRegister>(ds * 2);
-    EmitFpuRType(COP1, FMT_D, F0, fs, fd, COP1_CVT_W);
-  }
-
   void div(Register rs, Register rt) {
     EmitRType(SPECIAL, rs, rt, R0, 0, DIV);
   }
 
   void divd(DRegister dd, DRegister ds, DRegister dt) {
     FRegister fd = static_cast<FRegister>(dd * 2);
     FRegister fs = static_cast<FRegister>(ds * 2);
     FRegister ft = static_cast<FRegister>(dt * 2);
     EmitFpuRType(COP1, FMT_D, ft, fs, fd, COP1_DIV);
   }
@@ skipping 1139 matching lines @@
                                   Register value,
                                   Label* no_update);
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_MIPS_H_