MIPS: [turbofan] Add RoundUint32ToFloat32 operator to Turbofan.

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

Index: src/compiler/mips/code-generator-mips.cc
diff --git a/src/compiler/mips/code-generator-mips.cc b/src/compiler/mips/code-generator-mips.cc
index 3c1fc3c5faf084126d477663086949ac7bc6fa04..ff4de79dab0904aa33cd9a1cb40783da8f09dd27 100644
--- a/src/compiler/mips/code-generator-mips.cc
+++ b/src/compiler/mips/code-generator-mips.cc
@@ -1028,6 +1028,12 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       __ cvt_s_w(i.OutputDoubleRegister(), scratch);
       break;
     }
+    case kMipsCvtSUw: {
+      FPURegister scratch = kScratchDoubleReg;
+      __ Cvt_d_uw(i.OutputDoubleRegister(), i.InputRegister(0), scratch);
+      __ cvt_s_d(i.OutputDoubleRegister(), i.OutputDoubleRegister());
+      break;
+    }
     case kMipsCvtDUw: {
       FPURegister scratch = kScratchDoubleReg;
       __ Cvt_d_uw(i.OutputDoubleRegister(), i.InputRegister(0), scratch);