From: Chris Duncan <chris@codecow.com>
Date: Mon, 28 Sep 2026 15:14:15 +0000 (-0700)
Subject: Eliminate dead code.
X-Git-Url: https://git.codecow.com/?a=commitdiff_plain;h=e34bd35298f6c5ea795ca68db9c970f51d556ce3;p=nano25519.git

Eliminate dead code.
---

diff --git a/src/assembly/ed25519/fe.ts b/src/assembly/ed25519/fe.ts
index 89b2092..82765b7 100644
--- a/src/assembly/ed25519/fe.ts
+++ b/src/assembly/ed25519/fe.ts
@@ -73,22 +73,6 @@ export function fe_add (h: FieldElement, f: FieldElement, g: FieldElement): void
 	v128.store_lane<i64>(h_ptr, v128.add<i32>(v128.load(f_ptr, 32), v128.load(g_ptr, 32)), 0, 32)
 }
 
-/**
- * Conditionally copy values from one FieldElement to another.
- *
- * @param {usize} f FieldElement destination
- * @param {usize} g FieldElement source
- * @param {u64} b Copy `g` into `f` if 1, copy `f` into `f` if 0
- */
-//@ts-expect-error
-@inline
-export function fe_memcmov (f: usize, g: usize, b: u64): void {
-	const c = v128.splat<u64>(0 - b)
-	v128.store(f, v128.bitselect(v128.load(g), v128.load(f, 0), c))
-	v128.store(f, v128.bitselect(v128.load(g, 16), v128.load(f, 16), c), 16)
-	v128.store_lane<u64>(f, v128.bitselect(v128.load(g, 32), v128.load(f, 32), c), 0, 32)
-}
-
 /**
  * Conditionally copy values from one FieldElement to another.
  *
@@ -99,19 +83,12 @@ export function fe_memcmov (f: usize, g: usize, b: u64): void {
 //@ts-expect-error
 @inline
 export function fe_cmov (f: FieldElement, g: FieldElement, b: u64): void {
-	fe_memcmov(changetype<usize>(f), changetype<usize>(g), b)
-}
-
-/**
- * Copy values from one FieldElement to another.
- *
- * @param {usize} h pointer to FieldElement destination
- * @param {usize} f pointer to FieldElement source
- */
-//@ts-expect-error
-@inline
-export function fe_memcopy (h: usize, f: usize): void {
-	memory.copy(h, f, 40)
+	const f_ptr = changetype<usize>(f)
+	const g_ptr = changetype<usize>(g)
+	const c = v128.splat<u64>(0 - b)
+	v128.store(f_ptr, v128.bitselect(v128.load(g_ptr), v128.load(f_ptr, 0), c))
+	v128.store(f_ptr, v128.bitselect(v128.load(g_ptr, 16), v128.load(f_ptr, 16), c), 16)
+	v128.store_lane<u64>(f_ptr, v128.bitselect(v128.load(g_ptr, 32), v128.load(f_ptr, 32), c), 0, 32)
 }
 
 /**
@@ -126,35 +103,6 @@ export function fe_copy (h: FieldElement, f: FieldElement): void {
 	memory.copy(changetype<usize>(h), changetype<usize>(f), 40)
 }
 
-/**
- * Conditionally swap values between two FieldElements.
- *
- * @param f FieldElement destination
- * @param g FieldElement source
- * @param b Copy `f` into `g` and `g` into `f` if 1, else copy self if 0
- */
-//@ts-expect-error
-@inline
-export function fe_cswap (f: FieldElement, g: FieldElement, b: u64): void {
-	const f_ptr = changetype<usize>(f)
-	const g_ptr = changetype<usize>(g)
-	const c = v128.splat<u64>(0 - b)
-
-	const f03 = v128.load(f_ptr)
-	const g03 = v128.load(g_ptr)
-	const f47 = v128.load(f_ptr, 16)
-	const g47 = v128.load(g_ptr, 16)
-	const f89 = v128.load(f_ptr, 32)
-	const g89 = v128.load(g_ptr, 32)
-
-	v128.store(f_ptr, v128.bitselect(g03, f03, c))
-	v128.store(g_ptr, v128.bitselect(f03, g03, c))
-	v128.store(f_ptr, v128.bitselect(g47, f47, c), 16)
-	v128.store(g_ptr, v128.bitselect(f47, g47, c), 16)
-	v128.store_lane<i64>(f_ptr, v128.bitselect(g89, f89, c), 0, 32)
-	v128.store_lane<i64>(g_ptr, v128.bitselect(f89, g89, c), 0, 32)
-}
-
 /**
  * Add a FieldElement to itself and store the sum.
  *