S390 [wasm-simd]: Implement i64x2.abs

Bug: v8:11416
Change-Id: I0c993ee564358f5c5f8880cbae1bce9ff2128087
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2698308
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Reviewed-by: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/master@{#72798}

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

@@ -2524,6 +2524,7 @@ void InstructionSelector::VisitI32x4TruncSatF64x2UZero(Node* node) {
 }
 void InstructionSelector::VisitI64x2GtS(Node* node) { UNIMPLEMENTED(); }
 void InstructionSelector::VisitI64x2GeS(Node* node) { UNIMPLEMENTED(); }
+void InstructionSelector::VisitI64x2Abs(Node* node) { UNIMPLEMENTED(); }
 
 void InstructionSelector::EmitPrepareResults(
     ZoneVector<PushParameter>* results, const CallDescriptor* call_descriptor,

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

@@ -3434,6 +3434,11 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
              Condition(0), Condition(2));
       break;
     }
+    case kS390_I64x2Abs: {
+      __ vlp(i.OutputSimd128Register(), i.InputSimd128Register(0), Condition(0),
+             Condition(0), Condition(3));
+      break;
+    }
     // vector boolean unops
     case kS390_V128AnyTrue: {
       Simd128Register src = i.InputSimd128Register(0);

src/compiler/backend/s390/instruction-codes-s390.h

@@ -271,6 +271,7 @@ namespace compiler {
   V(S390_I64x2Ne)                           \
   V(S390_I64x2GtS)                          \
   V(S390_I64x2GeS)                          \
+  V(S390_I64x2Abs)                          \
   V(S390_I32x4Splat)                        \
   V(S390_I32x4ExtractLane)                  \
   V(S390_I32x4ReplaceLane)                  \

src/compiler/backend/s390/instruction-scheduler-s390.cc

@@ -218,6 +218,7 @@ int InstructionScheduler::GetTargetInstructionFlags(
     case kS390_I64x2Ne:
     case kS390_I64x2GtS:
     case kS390_I64x2GeS:
+    case kS390_I64x2Abs:
     case kS390_I32x4Splat:
     case kS390_I32x4ExtractLane:
     case kS390_I32x4ReplaceLane:

src/compiler/backend/s390/instruction-selector-s390.cc

@@ -2526,6 +2526,7 @@ void InstructionSelector::VisitWord64AtomicStore(Node* node) {
   V(I64x2SConvertI32x4High)  \
   V(I64x2UConvertI32x4Low)   \
   V(I64x2UConvertI32x4High)  \
+  V(I64x2Abs)                \
   V(I32x4Neg)                \
   V(I32x4Abs)                \
   V(I32x4SConvertI16x8Low)   \