From: Chris Duncan <chris@zoso.dev>
Date: Fri, 13 Dec 2024 23:53:00 +0000 (-0800)
Subject: Initial implementation of precalculated block hash components.
X-Git-Url: https://zoso.dev/?a=commitdiff_plain;h=5c1beff8308bf6273d6fd31e91521e2f0a125a0d;p=libnemo.git

Initial implementation of precalculated block hash components.
---

diff --git a/src/lib/workers/pow.ts b/src/lib/workers/pow.ts
index 11fc25a..710b8d9 100644
--- a/src/lib/workers/pow.ts
+++ b/src/lib/workers/pow.ts
@@ -86,6 +86,12 @@ export class Pow {
 		if (this.gl == null) throw new Error('webgl2_required')
 		this.gl.clearColor(0, 0, 0, 1)
 
+		const blockHashArray: number[] = []
+		for (let i = 0; i < 8; i++) {
+			blockHashArray.push(parseInt(reverseHex.slice(i * 8, (i + 1) * 8), 16))
+		}
+		const blockHashComponents: Uint32Array = new Uint32Array(blockHashArray)
+
 		// Vertext Shader
 		const vsSource = `#version 300 es
 		precision highp float;
@@ -113,6 +119,8 @@ export class Pow {
 		uniform uvec4 u_work0;
 		// Last 4 bytes remain as generated externally
 		uniform uvec4 u_work1;
+		// Precalculated block hash components
+		uniform uint blockHash[8];
 
 		// Defined separately from uint v[32] below as the original value is required
 		// to calculate the second uint32 of the digest for threshold comparison
@@ -169,10 +177,6 @@ export class Pow {
 			v[a] = o0;
 			v[a + 1] = o1;
 		}
-		// Sets v[a,a+1] += v[b,b+1]
-		//void add_uint64 (int a, int b) {
-			//add_uint64(a, v[b], v[b+1]);
-		//}
 
 		// G Mixing function
 		void B2B_G (int a, int b, int c, int d, int ix, int iy) {
@@ -228,14 +232,14 @@ export class Pow {
 			m[1] = (u_work1.r ^ (u_work1.g << 8) ^ (u_work1.b << 16) ^ (u_work1.a << 24));
 
 			// Block hash
-			m[2] = 0x${reverseHex.slice(56, 64)}u;
-			m[3] = 0x${reverseHex.slice(48, 56)}u;
-			m[4] = 0x${reverseHex.slice(40, 48)}u;
-			m[5] = 0x${reverseHex.slice(32, 40)}u;
-			m[6] = 0x${reverseHex.slice(24, 32)}u;
-			m[7] = 0x${reverseHex.slice(16, 24)}u;
-			m[8] = 0x${reverseHex.slice(8, 16)}u;
-			m[9] = 0x${reverseHex.slice(0, 8)}u;
+			m[2] = blockHash[0];
+			m[3] = blockHash[1];
+			m[4] = blockHash[2];
+			m[5] = blockHash[3];
+			m[6] = blockHash[4];
+			m[7] = blockHash[5];
+			m[8] = blockHash[6];
+			m[9] = blockHash[7];
 
 			// twelve rounds of mixing
 			for(i=0;i<12;i++) {
@@ -319,10 +323,13 @@ export class Pow {
 
 		const work0Location = this.gl.getUniformLocation(program, 'u_work0')
 		const work1Location = this.gl.getUniformLocation(program, 'u_work1')
+		const blockHashLocation = this.gl.getUniformLocation(program, "blockHash")
 
 		// Draw output until success or progressCallback says to stop
+		let n = 0
 		const frameTimes: number[] = []
 		const draw = (): void => {
+			n++
 			if (this.gl == null) throw new Error('webgl2_required')
 			performance.mark('start')
 			crypto.getRandomValues(this.work0)
@@ -330,6 +337,7 @@ export class Pow {
 
 			this.gl.uniform4uiv(work0Location, this.work0)
 			this.gl.uniform4uiv(work1Location, this.work1)
+			this.gl.uniform1uiv(blockHashLocation, new Uint32Array(blockHashComponents))
 
 			this.gl.clear(this.gl.COLOR_BUFFER_BIT)
 			this.gl.drawArrays(this.gl.TRIANGLES, 0, 6)
@@ -342,6 +350,7 @@ export class Pow {
 					frameTimes.push(performance.measure('draw', 'start', 'end').duration)
 					performance.clearMarks()
 					console.log(`average frame time: ${(frameTimes.reduce((a, b) => a + b)) / frameTimes.length} ms`)
+					console.log(`frames calculated: ${n}`)
 					const hex = this.hexify(this.work1) + this.hexify([
 						pixels[i + 2],
 						pixels[i + 3],