From: Chris Duncan <chris@zoso.dev>
Date: Thu, 16 Jan 2025 15:21:38 +0000 (-0800)
Subject: Some final steps are unnecessary since we only use v0 and v8 in the threshold compari... 
X-Git-Tag: v2.0.0~44
X-Git-Url: https://zoso.dev/?a=commitdiff_plain;h=d978f7634d73541dffa751895ba11cc0ceb70a62;p=nano-pow.git

Some final steps are unnecessary since we only use v0 and v8 in the threshold comparison, and any steps uninvolved with their final values can be discarded.
---

diff --git a/src/shaders/compute.wgsl b/src/shaders/compute.wgsl
index f4efcea..2da6c74 100644
--- a/src/shaders/compute.wgsl
+++ b/src/shaders/compute.wgsl
@@ -1551,21 +1551,12 @@ fn main(id: vec3<u32>) {
 	// skip since adding 0u does nothing
 	v13 = ((v13 ^ v2).xy >> ROTATE_16) | ((v13 ^ v2).yx << ROTATE_16);
 	v8 = v8 + v13 + vec2(0u, u32(v8.x + v13.x < v8.x));
-	v7 = ((v7 ^ v8).xy << ROTATE_1) | ((v7 ^ v8).yx >> ROTATE_31);
+	// skip since we already have the final values of `v0` and `v8`
 
 	/**
 	* r=11, i=7, a=v[3], b=v[4], c=v[9], d=v[14]
 	*/
-	v3 = v3 + v4 + vec2(0u, u32(v3.x + v4.x < v3.x));
-	// skip since adding 0u does nothing
-	v14 = v14.yx ^ v3.yx;
-	v9 = v9 + v14 + vec2(0u, u32(v9.x + v14.x < v9.x));
-	v4 = ((v4 ^ v9).xy >> ROTATE_24) | ((v4 ^ v9).yx << ROTATE_8);
-	v3 = v3 + v4 + vec2(0u, u32(v3.x + v4.x < v3.x));
-	v3 = v3 + m3 + vec2(0u, u32(v3.x + m3.x < v3.x));
-	v14 = ((v14 ^ v3).xy >> ROTATE_16) | ((v14 ^ v3).yx << ROTATE_16);
-	v9 = v9 + v14 + vec2(0u, u32(v9.x + v14.x < v9.x));
-	v4 = ((v4 ^ v9).xy << ROTATE_1) | ((v4 ^ v9).yx >> ROTATE_31);
+	// skip entire step since we already have the final values of `v0` and `v8`
 
 
 
@@ -1576,7 +1567,7 @@ fn main(id: vec3<u32>) {
 	****************************************************************************/
 
 	/**
-	* Set m0 if it passes the threshold and no other thread has set it
+	* Set nonce if it passes the threshold and no other thread has set it
 	*/
 	if ((BLAKE2B_IV32_1 ^ v0.y ^ v8.y) > threshold && atomicLoad(&work.found) == 0u) {
 		atomicStore(&work.found, 1u);