Fix 'MIPS: [turbofan] Support for %_DoubleHi, %_DoubleLo and %_ConstructDouble.'

src/compiler/mips64/code-generator-mips64.cc

Index: src/compiler/mips64/code-generator-mips64.cc
diff --git a/src/compiler/mips64/code-generator-mips64.cc b/src/compiler/mips64/code-generator-mips64.cc
index 1746afe2fa9996227679b73ce0a33e0fcc02d80f..e6155aa149995dbf4ced457929184ec0c09f2ecb 100644
--- a/src/compiler/mips64/code-generator-mips64.cc
+++ b/src/compiler/mips64/code-generator-mips64.cc
@@ -687,9 +687,6 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
     }
     case kMips64FmoveLowUwD:
       __ FmoveLow(i.OutputRegister(), i.InputDoubleRegister(0));
-      // remove sign.
-      __ dsll32(i.OutputRegister(), i.OutputRegister(), 0);
-      __ dsrl32(i.OutputRegister(), i.OutputRegister(), 0);
       break;
     case kMips64FmoveLowDUw:
       __ FmoveLow(i.OutputDoubleRegister(), i.InputRegister(1));