[turbofan] Make Float32Neg and Float64Neg mandatory operators.

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

 // Copyright 2014 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/ast/scopes.h"
 #include "src/compiler/code-generator.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/osr.h"
@@ skipping 1138 matching lines @@
                               i.InputDoubleRegister(1));
       __ CallCFunction(ExternalReference::mod_two_doubles_operation(isolate()),
                        0, 2);
       // Move the result in the double result register.
       __ MovFromFloatResult(i.OutputDoubleRegister());
       break;
     }
     case kMipsAbsD:
       __ abs_d(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
       break;
+    case kMipsNegS:
+      __ neg_s(i.OutputSingleRegister(), i.InputSingleRegister(0));
+      break;
+    case kMipsNegD:
+      __ neg_d(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
+      break;
     case kMipsSqrtD: {
       __ sqrt_d(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
       break;
     }
     case kMipsMaxD:
       __ max_d(i.OutputDoubleRegister(), i.InputDoubleRegister(0),
                i.InputDoubleRegister(1));
       break;
     case kMipsMinD:
       __ min_d(i.OutputDoubleRegister(), i.InputDoubleRegister(0),
@@ skipping 1021 matching lines @@
       padding_size -= v8::internal::Assembler::kInstrSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8