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

src/compiler/ppc/instruction-selector-ppc.cc

Index: src/compiler/ppc/instruction-selector-ppc.cc
diff --git a/src/compiler/ppc/instruction-selector-ppc.cc b/src/compiler/ppc/instruction-selector-ppc.cc
index f45ce43902aba44d981a78decf8bab1141a81c57..0a9f18cf88f9a6cb1c36896ad30b6993e8ca7926 100644
--- a/src/compiler/ppc/instruction-selector-ppc.cc
+++ b/src/compiler/ppc/instruction-selector-ppc.cc
@@ -1426,9 +1426,13 @@ void InstructionSelector::VisitFloat64RoundTiesEven(Node* node) {
   UNREACHABLE();
 }
 
-void InstructionSelector::VisitFloat32Neg(Node* node) { UNREACHABLE(); }
+void InstructionSelector::VisitFloat32Neg(Node* node) {
+  VisitRR(this, kPPC_NegDouble, node);
+}
 
-void InstructionSelector::VisitFloat64Neg(Node* node) { UNREACHABLE(); }
+void InstructionSelector::VisitFloat64Neg(Node* node) {
+  VisitRR(this, kPPC_NegDouble, node);
+}
 
 void InstructionSelector::VisitInt32AddWithOverflow(Node* node) {
   if (Node* ovf = NodeProperties::FindProjection(node, 1)) {