From: Chris Duncan <chris@zoso.dev>
Date: Wed, 12 Mar 2025 21:09:52 +0000 (-0700)
Subject: Fix subtle but important carry bit bug that allowed valid nonces to be generated... 
X-Git-Tag: v3.1.0~9^2~9
X-Git-Url: https://zoso.dev/?a=commitdiff_plain;h=86597f99af58b67b21b7662f48328935c2593a72;p=nano-pow.git

Fix subtle but important carry bit bug that allowed valid nonces to be generated that were technically incorrect but close enough to the correct value that it wasn't caught until now.
---

diff --git a/src/shaders/compute.wgsl b/src/shaders/compute.wgsl
index 54e7440..ba68f9e 100644
--- a/src/shaders/compute.wgsl
+++ b/src/shaders/compute.wgsl
@@ -1598,9 +1598,9 @@ fn main(id: vec3<u32>) {
 	vDE = (vDE >> ROTATE_16) | (vDE << ROTATE_16).yxwz;
 
 	// s0 = vAB + vFC;
-	// vAB = s0 + (vec4<u32>(s0 < vAB).yxwz & CARRY);
+	// vAB = s0 + (vec4<u32>(s0 < vAB) & CARRY).yxwz;
 	s1 = v89 + vDE;
-	v89 = s1 + (vec4<u32>(s1 < v89).yxwz & CARRY);
+	v89 = s1 + (vec4<u32>(s1 < v89) & CARRY).yxwz;
 
 	// v56 ^= vAB;
 	// v74 ^= v89;