deps: cherry-pick 477df06 from upstream v8

Original commit message:

    [API] Expand BigInt API

    Provide a more complete BigInt API.

    Bug: v8:7712
    Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
    Change-Id: Ic8562d616f3125deabdf8b52c7019b191bef0e07
    Reviewed-on: chromium-review.googlesource.com/1101198
    Commit-Queue: Yang Guo <yangguo@chromium.org>
    Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
    Reviewed-by: Yang Guo <yangguo@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#54122}

PR-URL: https://github.com/nodejs/node/pull/21644
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

1 files changed, 43 insertions, 0 deletions

diff --git a/deps/v8/src/api.cc b/deps/v8/src/api.cc
index 34b4773c2f..66ca4bb96a 100644
--- a/deps/v8/src/api.cc
+++ b/deps/v8/src/api.cc
@@ -8000,6 +8000,49 @@ Local<BigInt> v8::BigInt::New(Isolate* isolate, int64_t value) {
   return Utils::ToLocal(result);
 }
 
+Local<BigInt> v8::BigInt::NewFromUnsigned(Isolate* isolate, uint64_t value) {
+  CHECK(i::FLAG_harmony_bigint);
+  i::Isolate* internal_isolate = reinterpret_cast<i::Isolate*>(isolate);
+  ENTER_V8_NO_SCRIPT_NO_EXCEPTION(internal_isolate);
+  i::Handle<i::BigInt> result = i::BigInt::FromUint64(internal_isolate, value);
+  return Utils::ToLocal(result);
+}
+
+MaybeLocal<BigInt> v8::BigInt::NewFromWords(Local<Context> context,
+                                            int sign_bit, int word_count,
+                                            const uint64_t* words) {
+  CHECK(i::FLAG_harmony_bigint);
+  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(context->GetIsolate());
+  ENTER_V8_NO_SCRIPT(isolate, context, BigInt, NewFromWords,
+                     MaybeLocal<BigInt>(), InternalEscapableScope);
+  i::MaybeHandle<i::BigInt> result =
+      i::BigInt::FromWords64(isolate, sign_bit, word_count, words);
+  has_pending_exception = result.is_null();
+  RETURN_ON_FAILED_EXECUTION(BigInt);
+  RETURN_ESCAPED(Utils::ToLocal(result.ToHandleChecked()));
+}
+
+uint64_t v8::BigInt::Uint64Value(bool* lossless) const {
+  i::Handle<i::BigInt> handle = Utils::OpenHandle(this);
+  return handle->AsUint64(lossless);
+}
+
+int64_t v8::BigInt::Int64Value(bool* lossless) const {
+  i::Handle<i::BigInt> handle = Utils::OpenHandle(this);
+  return handle->AsInt64(lossless);
+}
+
+int BigInt::WordCount() const {
+  i::Handle<i::BigInt> handle = Utils::OpenHandle(this);
+  return handle->Words64Count();
+}
+
+void BigInt::ToWordsArray(int* sign_bit, int* word_count,
+                          uint64_t* words) const {
+  i::Handle<i::BigInt> handle = Utils::OpenHandle(this);
+  return handle->ToWordsArray64(sign_bit, word_count, words);
+}
+
 void Isolate::ReportExternalAllocationLimitReached() {
   i::Heap* heap = reinterpret_cast<i::Isolate*>(this)->heap();
   if (heap->gc_state() != i::Heap::NOT_IN_GC) return;