Expose SIMD.Float32x4 type to Javascript.

src/mips64/full-codegen-mips64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_MIPS64
 
 // Note on Mips implementation:
 //
@@ skipping 5207 matching lines @@
     __ GetObjectType(v0, v0, a1);
     __ Branch(if_false, ge, a1, Operand(FIRST_NONSTRING_TYPE));
     __ lbu(a1, FieldMemOperand(v0, Map::kBitFieldOffset));
     __ And(a1, a1, Operand(1 << Map::kIsUndetectable));
     Split(eq, a1, Operand(zero_reg),
           if_true, if_false, fall_through);
   } else if (String::Equals(check, factory->symbol_string())) {
     __ JumpIfSmi(v0, if_false);
     __ GetObjectType(v0, v0, a1);
     Split(eq, a1, Operand(SYMBOL_TYPE), if_true, if_false, fall_through);
+  } else if (String::Equals(check, factory->float32x4_string())) {
+    __ JumpIfSmi(v0, if_false);
+    __ GetObjectType(v0, v0, a1);
+    Split(eq, a1, Operand(FLOAT32X4_TYPE), if_true, if_false, fall_through);
   } else if (String::Equals(check, factory->boolean_string())) {
     __ LoadRoot(at, Heap::kTrueValueRootIndex);
     __ Branch(if_true, eq, v0, Operand(at));
     __ LoadRoot(at, Heap::kFalseValueRootIndex);
     Split(eq, v0, Operand(at), if_true, if_false, fall_through);
   } else if (String::Equals(check, factory->undefined_string())) {
     __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
     __ Branch(if_true, eq, v0, Operand(at));
     __ JumpIfSmi(v0, if_false);
     // Check for undetectable objects => true.
@@ skipping 319 matching lines @@
          reinterpret_cast<uint64_t>(
              isolate->builtins()->OsrAfterStackCheck()->entry()));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64