PPC: [turbofan] Add new Float32Abs and Float64Abs operators.

src/compiler/ppc/code-generator-ppc.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/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/ppc/macro-assembler-ppc.h"
@@ skipping 839 matching lines @@
       break;
     case kPPC_Neg:
       __ neg(i.OutputRegister(), i.InputRegister(0), LeaveOE, i.OutputRCBit());
       break;
     case kPPC_MaxDouble:
       ASSEMBLE_FLOAT_MAX(kScratchDoubleReg);
       break;
     case kPPC_MinDouble:
       ASSEMBLE_FLOAT_MIN(kScratchDoubleReg);
       break;
+    case kPPC_AbsDouble:
+      ASSEMBLE_FLOAT_UNOP_RC(fabs);
+      break;
     case kPPC_SqrtDouble:
       ASSEMBLE_FLOAT_UNOP_RC(fsqrt);
       break;
     case kPPC_FloorDouble:
       ASSEMBLE_FLOAT_UNOP_RC(frim);
       break;
     case kPPC_CeilDouble:
       ASSEMBLE_FLOAT_UNOP_RC(frip);
       break;
     case kPPC_TruncateDouble:
@@ skipping 618 matching lines @@
     }
   }
   MarkLazyDeoptSite();
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8