MIPS: Implement Neg_d and Neg_s instruction macros.

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 073c9f560c572738e596d8756a20010ae082f015..27ab5a409f67128e84da1a30e8ee5d0d27716507 100644
--- a/src/compiler/mips/code-generator-mips.cc
+++ b/src/compiler/mips/code-generator-mips.cc
@@ -1147,10 +1147,10 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       __ abs_d(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
       break;
     case kMipsNegS:
-      __ neg_s(i.OutputSingleRegister(), i.InputSingleRegister(0));
+      __ Neg_s(i.OutputSingleRegister(), i.InputSingleRegister(0));
       break;
     case kMipsNegD:
-      __ neg_d(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
+      __ Neg_d(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
       break;
     case kMipsSqrtD: {
       __ sqrt_d(i.OutputDoubleRegister(), i.InputDoubleRegister(0));