MIPS64: Port `[atomics] Implement 64-bit Atomics operations`

Port c2088790

Change-Id: Ia57a3a47bbc6f99fdf40ea58d01cbb007b4409e3
Reviewed-on: https://chromium-review.googlesource.com/1245773Reviewed-by: Sreten Kovacevic <skovacevic@wavecomp.com>
Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Sreten Kovacevic <skovacevic@wavecomp.com>
Cr-Commit-Position: refs/heads/master@{#56270}

src/compiler/instruction-selector.cc

@@ -2439,7 +2439,7 @@ void InstructionSelector::VisitF32x4UConvertI32x4(Node* node) {
 #endif  // !V8_TARGET_ARCH_ARM && !V8_TARGET_ARCH_ARM64 && !V8_TARGET_ARCH_MIPS
         // && !V8_TARGET_ARCH_MIPS64 && !V8_TARGET_ARCH_IA32
 
-#if !V8_TARGET_ARCH_X64 && !V8_TARGET_ARCH_ARM64
+#if !V8_TARGET_ARCH_X64 && !V8_TARGET_ARCH_ARM64 && !V8_TARGET_ARCH_MIPS64
 void InstructionSelector::VisitWord64AtomicLoad(Node* node) { UNIMPLEMENTED(); }
 
 void InstructionSelector::VisitWord64AtomicStore(Node* node) {

src/compiler/mips64/instruction-scheduler-mips64.cc

@@ -293,6 +293,11 @@ int InstructionScheduler::GetTargetInstructionFlags(
     case kMips64Ulw:
     case kMips64Ulwu:
     case kMips64Ulwc1:
+    case kMips64Word64AtomicLoadUint8:
+    case kMips64Word64AtomicLoadUint16:
+    case kMips64Word64AtomicLoadUint32:
+    case kMips64Word64AtomicLoadUint64:
+
       return kIsLoadOperation;
 
     case kMips64ModD:
@@ -312,6 +317,38 @@ int InstructionScheduler::GetTargetInstructionFlags(
     case kMips64Ush:
     case kMips64Usw:
     case kMips64Uswc1:
+    case kMips64Word64AtomicStoreWord8:
+    case kMips64Word64AtomicStoreWord16:
+    case kMips64Word64AtomicStoreWord32:
+    case kMips64Word64AtomicStoreWord64:
+    case kMips64Word64AtomicAddUint8:
+    case kMips64Word64AtomicAddUint16:
+    case kMips64Word64AtomicAddUint32:
+    case kMips64Word64AtomicAddUint64:
+    case kMips64Word64AtomicSubUint8:
+    case kMips64Word64AtomicSubUint16:
+    case kMips64Word64AtomicSubUint32:
+    case kMips64Word64AtomicSubUint64:
+    case kMips64Word64AtomicAndUint8:
+    case kMips64Word64AtomicAndUint16:
+    case kMips64Word64AtomicAndUint32:
+    case kMips64Word64AtomicAndUint64:
+    case kMips64Word64AtomicOrUint8:
+    case kMips64Word64AtomicOrUint16:
+    case kMips64Word64AtomicOrUint32:
+    case kMips64Word64AtomicOrUint64:
+    case kMips64Word64AtomicXorUint8:
+    case kMips64Word64AtomicXorUint16:
+    case kMips64Word64AtomicXorUint32:
+    case kMips64Word64AtomicXorUint64:
+    case kMips64Word64AtomicExchangeUint8:
+    case kMips64Word64AtomicExchangeUint16:
+    case kMips64Word64AtomicExchangeUint32:
+    case kMips64Word64AtomicExchangeUint64:
+    case kMips64Word64AtomicCompareExchangeUint8:
+    case kMips64Word64AtomicCompareExchangeUint16:
+    case kMips64Word64AtomicCompareExchangeUint32:
+    case kMips64Word64AtomicCompareExchangeUint64:
       return kHasSideEffect;
 
 #define CASE(Name) case k##Name: