Revert "[SAB] Move Atomics builtins to C++"

src/runtime/runtime-futex.cc

Index: src/runtime/runtime-futex.cc
diff --git a/src/runtime/runtime-futex.cc b/src/runtime/runtime-futex.cc
index 5c2106e6859c4ea8aed6dda846ab2eb6405a60bb..b6582ffc7f937318e3be5666381c664fc73b9e14 100644
--- a/src/runtime/runtime-futex.cc
+++ b/src/runtime/runtime-futex.cc
@@ -17,6 +17,44 @@
 namespace v8 {
 namespace internal {
 
+RUNTIME_FUNCTION(Runtime_AtomicsWait) {
+  HandleScope scope(isolate);
+  DCHECK_EQ(4, args.length());
+  CONVERT_ARG_HANDLE_CHECKED(JSTypedArray, sta, 0);
+  CONVERT_SIZE_ARG_CHECKED(index, 1);
+  CONVERT_INT32_ARG_CHECKED(value, 2);
+  CONVERT_DOUBLE_ARG_CHECKED(timeout, 3);
+  CHECK(sta->GetBuffer()->is_shared());
+  CHECK_LT(index, NumberToSize(sta->length()));
+  CHECK_EQ(sta->type(), kExternalInt32Array);
+  CHECK(timeout == V8_INFINITY || !std::isnan(timeout));
+
+  if (!isolate->allow_atomics_wait()) {
+    THROW_NEW_ERROR_RETURN_FAILURE(
+        isolate, NewTypeError(MessageTemplate::kAtomicsWaitNotAllowed));
+  }
+
+  Handle<JSArrayBuffer> array_buffer = sta->GetBuffer();
+  size_t addr = (index << 2) + NumberToSize(sta->byte_offset());
+
+  return FutexEmulation::Wait(isolate, array_buffer, addr, value, timeout);
+}
+
+RUNTIME_FUNCTION(Runtime_AtomicsWake) {
+  HandleScope scope(isolate);
+  DCHECK_EQ(3, args.length());
+  CONVERT_ARG_HANDLE_CHECKED(JSTypedArray, sta, 0);
+  CONVERT_SIZE_ARG_CHECKED(index, 1);
+  CONVERT_UINT32_ARG_CHECKED(count, 2);
+  CHECK(sta->GetBuffer()->is_shared());
+  CHECK_LT(index, NumberToSize(sta->length()));
+  CHECK_EQ(sta->type(), kExternalInt32Array);
+
+  Handle<JSArrayBuffer> array_buffer = sta->GetBuffer();
+  size_t addr = (index << 2) + NumberToSize(sta->byte_offset());
+
+  return FutexEmulation::Wake(isolate, array_buffer, addr, count);
+}
 
 RUNTIME_FUNCTION(Runtime_AtomicsNumWaitersForTesting) {
   HandleScope scope(isolate);