From 33967994143b351f3908a9f9d859009f67e79762 Mon Sep 17 00:00:00 2001
From: MaxGraey <maxgraey@gmail.com>
Date: Sun, 24 Oct 2021 17:53:35 +0300
Subject: [PATCH 1/2] impove nearest js portable polyfill

---
 std/portable/index.js | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/std/portable/index.js b/std/portable/index.js
index d027d8d967..2fb9e1f5c5 100644
--- a/std/portable/index.js
+++ b/std/portable/index.js
@@ -136,12 +136,12 @@ if (typeof globalScope.ASC_TARGET === "undefined") {
 
   globalScope["floor"] = Math.floor;
 
-  // Adopt code from https://github.com/rfk/wasm-polyfill
   globalScope["nearest"] = function nearest(value) {
-    if (Math.abs(value - Math.trunc(value)) === 0.5) {
-      return 2.0 * Math.round(value * 0.5);
-    }
-    return Math.round(value);
+    const TO_INT64 = 4503599627370496.0;
+    const y = Math.abs(value);
+    return y < TO_INT64
+      ? Math.abs(y + TO_INT64 - TO_INT64) * Math.sign(value)
+      : value;
   };
 
   globalScope["select"] = function select(ifTrue, ifFalse, condition) {

From b3f460815fb6631dca1e893732b97392a995586f Mon Sep 17 00:00:00 2001
From: MaxGraey <maxgraey@gmail.com>
Date: Sun, 24 Oct 2021 18:51:30 +0300
Subject: [PATCH 2/2] refactor

---
 std/portable/index.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/std/portable/index.js b/std/portable/index.js
index 2fb9e1f5c5..2400d61746 100644
--- a/std/portable/index.js
+++ b/std/portable/index.js
@@ -137,10 +137,10 @@ if (typeof globalScope.ASC_TARGET === "undefined") {
   globalScope["floor"] = Math.floor;
 
   globalScope["nearest"] = function nearest(value) {
-    const TO_INT64 = 4503599627370496.0;
+    const INV_EPS64 = 4503599627370496.0;
     const y = Math.abs(value);
-    return y < TO_INT64
-      ? Math.abs(y + TO_INT64 - TO_INT64) * Math.sign(value)
+    return y < INV_EPS64
+      ? Math.abs(y + INV_EPS64 - INV_EPS64) * Math.sign(value)
       : value;
   };