From cae375f1419b5b2cebec5b449a7aa073dbb537ff Mon Sep 17 00:00:00 2001
From: cuiweixie <cuiweixie@gmail.com>
Date: Tue, 4 Nov 2025 23:17:42 +0800
Subject: [PATCH] core/vm: optimize osakaMultComplexity

---
 core/vm/contracts.go | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/core/vm/contracts.go b/core/vm/contracts.go
index cae0be9f2d..99c954e3de 100644
--- a/core/vm/contracts.go
+++ b/core/vm/contracts.go
@@ -456,11 +456,10 @@ func osakaMultComplexity(x uint64) uint64 {
 	}
 	// For x > 32, return 2 * berlinMultComplexity(x)
 	result := berlinMultComplexity(x)
-	carry, result := bits.Mul64(result, 2)
-	if carry != 0 {
+	if result >= (1 << 63) { // overflow check
 		return math.MaxUint64
 	}
-	return result
+	return result << 1
 }
 
 // modexpIterationCount calculates the number of iterations for the modexp precompile.