From: Chris Duncan <chris@zoso.dev>
Date: Thu, 14 Aug 2025 15:23:33 +0000 (-0700)
Subject: Use extra term to make mod and carry process a little more clear.
X-Git-Tag: v0.10.5~41^2~96
X-Git-Url: https://git.codecow.com/?a=commitdiff_plain;h=b9a4b545b225db6cba77e68c331e866a9a4363dc;p=libnemo.git

Use extra term to make mod and carry process a little more clear.
---

diff --git a/src/lib/crypto/nano-nacl.ts b/src/lib/crypto/nano-nacl.ts
index 9a0a2ed..04c17f9 100644
--- a/src/lib/crypto/nano-nacl.ts
+++ b/src/lib/crypto/nano-nacl.ts
@@ -301,13 +301,14 @@ export class NanoNaCl {
 	])
 
 	static modL (r: Uint8Array, x: BigInt64Array): void {
-		let c: bigint, v: bigint
+		let c: bigint, t: bigint, v: bigint
 		for (let i = 63; i >= 32; --i) {
 			c = 0n
 			for (let j = i - 32, k = i - 12; j < k; j++) {
-				x[j] += c - 16n * x[i] * this.L[j - (i - 32)]
-				c = (x[j] + 128n) / 256n
-				x[j] -= c * 256n
+				t = 16n * x[i] * this.L[j - (i - 32)]
+				v = x[j] + c - t
+				c = (v + 128n) / 256n
+				x[j] = v - (c * 256n)
 			}
 			x[i - 12] += c
 			x[i] = 0n