MIPS: Add cvt_d_s to disassembler.

src/mips/disasm-mips.cc

Index: src/mips/disasm-mips.cc
diff --git a/src/mips/disasm-mips.cc b/src/mips/disasm-mips.cc
index 564627e460c7ba0a784d1b52adf2d2f4362ba2c6..4f725cff54a90d6cc1e768987e79e858c73c25ee 100644
--- a/src/mips/disasm-mips.cc
+++ b/src/mips/disasm-mips.cc
@@ -555,7 +555,13 @@ void Decoder::DecodeTypeRegister(Instruction* instr) {
           }
           break;
         case S:
-          UNIMPLEMENTED_MIPS();
+          switch (instr->FunctionFieldRaw()) {
+            case CVT_D_S:
+              Format(instr, "cvt.d.s 'fd, 'fs");
+              break;
+            default:
+              UNIMPLEMENTED_MIPS();
+          }
           break;
         case W:
           switch (instr->FunctionFieldRaw()) {