buffer: add {read|write}Big[U]Int64{BE|LE} methods

PR-URL: https://github.com/nodejs/node/pull/19691
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

2 files changed, 25 insertions, 0 deletions

diff --git a/benchmark/buffers/buffer-read.js b/benchmark/buffers/buffer-read.js
index 38a9a847b3..06e2c6c70e 100644
--- a/benchmark/buffers/buffer-read.js
+++ b/benchmark/buffers/buffer-read.js
@@ -2,6 +2,10 @@
 const common = require('../common.js');
 
 const types = [
+  'BigUInt64LE',
+  'BigUInt64BE',
+  'BigInt64LE',
+  'BigInt64BE',
   'UInt8',
   'UInt16LE',
   'UInt16BE',
diff --git a/benchmark/buffers/buffer-write.js b/benchmark/buffers/buffer-write.js
index 33d33a63fc..be5a6adc8e 100644
--- a/benchmark/buffers/buffer-write.js
+++ b/benchmark/buffers/buffer-write.js
@@ -2,6 +2,10 @@
 const common = require('../common.js');
 
 const types = [
+  'BigUInt64LE',
+  'BigUInt64BE',
+  'BigInt64LE',
+  'BigInt64BE',
   'UInt8',
   'UInt16LE',
   'UInt16BE',
@@ -32,11 +36,17 @@ const INT8 = 0x7f;
 const INT16 = 0x7fff;
 const INT32 = 0x7fffffff;
 const INT48 = 0x7fffffffffff;
+const INT64 = 0x7fffffffffffffffn;
 const UINT8 = 0xff;
 const UINT16 = 0xffff;
 const UINT32 = 0xffffffff;
+const UINT64 = 0xffffffffffffffffn;
 
 const mod = {
+  writeBigInt64BE: INT64,
+  writeBigInt64LE: INT64,
+  writeBigUInt64BE: UINT64,
+  writeBigUInt64LE: UINT64,
   writeInt8: INT8,
   writeInt16BE: INT16,
   writeInt16LE: INT16,
@@ -67,12 +77,23 @@ function main({ n, buf, type }) {
 
   if (!/\d/.test(fn))
     benchSpecialInt(buff, fn, n);
+  else if (/BigU?Int/.test(fn))
+    benchBigInt(buff, fn, BigInt(n));
   else if (/Int/.test(fn))
     benchInt(buff, fn, n);
   else
     benchFloat(buff, fn, n);
 }
 
+function benchBigInt(buff, fn, n) {
+  const m = mod[fn];
+  bench.start();
+  for (var i = 0n; i !== n; i++) {
+    buff[fn](i & m, 0);
+  }
+  bench.end(Number(n));
+}
+
 function benchInt(buff, fn, n) {
   const m = mod[fn];
   bench.start();