MIPS: [turbofan] Combine ChangeFloat64ToInt32 with Float64Round ops.

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 239de312da27ecdac38bed6b8a2a95efb98357a6..d96b66ff63893395d1c70341a83f4e4f996065db 100644
--- a/src/compiler/mips/code-generator-mips.cc
+++ b/src/compiler/mips/code-generator-mips.cc
@@ -939,6 +939,24 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       __ Cvt_d_uw(i.OutputDoubleRegister(), i.InputRegister(0), scratch);
       break;
     }
+    case kMipsFloorWD: {
+      FPURegister scratch = kScratchDoubleReg;
+      __ floor_w_d(scratch, i.InputDoubleRegister(0));
+      __ mfc1(i.OutputRegister(), scratch);
+      break;
+    }
+    case kMipsCeilWD: {
+      FPURegister scratch = kScratchDoubleReg;
+      __ ceil_w_d(scratch, i.InputDoubleRegister(0));
+      __ mfc1(i.OutputRegister(), scratch);
+      break;
+    }
+    case kMipsRoundWD: {
+      FPURegister scratch = kScratchDoubleReg;
+      __ round_w_d(scratch, i.InputDoubleRegister(0));
+      __ mfc1(i.OutputRegister(), scratch);
+      break;
+    }
     case kMipsTruncWD: {
       FPURegister scratch = kScratchDoubleReg;
       // Other arches use round to zero here, so we follow.