[turbofan] Make Float32Neg and Float64Neg mandatory operators.

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 d01989225c0c865fa561f39147fd9521605b9efc..3823bb0217ae707178acd2dcb13d782e90d8f9ef 100644
--- a/src/compiler/mips64/code-generator-mips64.cc
+++ b/src/compiler/mips64/code-generator-mips64.cc
@@ -1295,6 +1295,9 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
     case kMips64AbsS:
       __ abs_s(i.OutputSingleRegister(), i.InputSingleRegister(0));
       break;
+    case kMips64NegS:
+      __ neg_s(i.OutputSingleRegister(), i.InputSingleRegister(0));
+      break;
     case kMips64SqrtS: {
       __ sqrt_s(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
       break;
@@ -1349,6 +1352,9 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
     case kMips64AbsD:
       __ abs_d(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
       break;
+    case kMips64NegD:
+      __ neg_d(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
+      break;
     case kMips64SqrtD: {
       __ sqrt_d(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
       break;