PPC/s390: Implement VisitFloat32Neg/VisitFloat64Neg and instr lcebr for s390

src/compiler/s390/code-generator-s390.cc

 // Copyright 2015 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/ast/scopes.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 1499 matching lines @@
                 v8::internal::Assembler::FIDBRA_ROUND_TOWARD_POS_INF);
       break;
     case kS390_TruncateDouble:
       __ fidbra(i.OutputDoubleRegister(), i.InputDoubleRegister(0),
                 v8::internal::Assembler::FIDBRA_ROUND_TOWARD_0);
       break;
     case kS390_RoundDouble:
       __ fidbra(i.OutputDoubleRegister(), i.InputDoubleRegister(0),
                 v8::internal::Assembler::FIDBRA_ROUND_TO_NEAREST_AWAY_FROM_0);
       break;
+    case kS390_NegFloat:
+      ASSEMBLE_FLOAT_UNOP(lcebr);
+      break;
     case kS390_NegDouble:
       ASSEMBLE_FLOAT_UNOP(lcdbr);
       break;
     case kS390_Cntlz32: {
       __ llgfr(i.OutputRegister(), i.InputRegister(0));
       __ flogr(r0, i.OutputRegister());
       __ LoadRR(i.OutputRegister(), r0);
       __ SubP(i.OutputRegister(), Operand(32));
     } break;
 #if V8_TARGET_ARCH_S390X
@@ skipping 930 matching lines @@
       padding_size -= 2;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8