From b5455751929d7f9a3581e27eb0adcf7ef9d01a0c Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Sat, 18 May 2024 14:27:02 +0900
Subject: fix: i64.shr_u

---
 src/Execution/Runtime.php | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/Execution/Runtime.php b/src/Execution/Runtime.php
index d15e098..90d05e6 100644
--- a/src/Execution/Runtime.php
+++ b/src/Execution/Runtime.php
@@ -1570,8 +1570,13 @@ final class Runtime
     {
         $c2 = $this->stack->popInt();
         $k = $c2 % 64;
+        if ($k === 0) {
+            return;
+        }
+        // Perform shr_u based on string manipulation because PHP does not
+        // support shr_u operation.
         $c1 = $this->stack->popInt();
-        $this->stack->pushValue($c1 >> $k);
+        $this->stack->pushValue(bindec(substr(decbin($c1), 0, -$k)));
     }
 
     private function execInstrNumericI64Sub(Instrs\Numeric\I64Sub $instr): void
-- 
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