MIPS[64]: Support for some SIMD operations

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 9982c88bd2f53058bb6073040e5193199db57768..925b0f8a1aca430534f7687364b475e6e2788ecb 100644
--- a/src/compiler/mips64/code-generator-mips64.cc
+++ b/src/compiler/mips64/code-generator-mips64.cc
@@ -1932,6 +1932,45 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       __ Assert(eq, static_cast<BailoutReason>(i.InputOperand(2).immediate()),
                 i.InputRegister(0), Operand(i.InputRegister(1)));
       break;
+    case kMips64Simd128Zero: {
+      CpuFeatureScope msa_scope(masm(), MIPS_SIMD);
+      __ xor_v(i.OutputSimd128Register(), i.OutputSimd128Register(),
+               i.OutputSimd128Register());
+      break;
+    }
+    case kMips64Int32x4Splat: {
+      CpuFeatureScope msa_scope(masm(), MIPS_SIMD);
+      __ fill_w(i.OutputSimd128Register(), i.InputRegister(0));
+      break;
+    }
+    case kMips64Int32x4ExtractLane: {
+      CpuFeatureScope msa_scope(masm(), MIPS_SIMD);
+      __ copy_s_w(i.OutputRegister(), i.InputSimd128Register(0),
+                  i.InputInt8(1));
+      break;
+    }
+    case kMips64Int32x4ReplaceLane: {
+      CpuFeatureScope msa_scope(masm(), MIPS_SIMD);
+      Simd128Register src = i.InputSimd128Register(0);
+      Simd128Register dst = i.OutputSimd128Register();
+      if (!src.is(dst)) {
+        __ move_v(dst, src);
+      }
+      __ insert_w(dst, i.InputInt8(1), i.InputRegister(2));
+      break;
+    }
+    case kMips64Int32x4Add: {
+      CpuFeatureScope msa_scope(masm(), MIPS_SIMD);
+      __ addv_w(i.OutputSimd128Register(), i.InputSimd128Register(0),
+                i.InputSimd128Register(1));
+      break;
+    }
+    case kMips64Int32x4Sub: {
+      CpuFeatureScope msa_scope(masm(), MIPS_SIMD);
+      __ subv_w(i.OutputSimd128Register(), i.InputSimd128Register(0),
+                i.InputSimd128Register(1));
+      break;
+    }
   }
   return kSuccess;
 }  // NOLINT(readability/fn_size)