From 18c00f504298894bd5b6f0d3bc0bf0aa3d7365b9 Mon Sep 17 00:00:00 2001
From: Andy Polyakov <appro@cryptogams.org>
Date: Wed, 30 Oct 2024 18:40:26 +0100
Subject: [PATCH] ff/mont_t.cuh: make compiler reject unsupported moduli bit
 length.

---
 ff/mont_t.cuh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/ff/mont_t.cuh b/ff/mont_t.cuh
index 02864f7..9c115a3 100644
--- a/ff/mont_t.cuh
+++ b/ff/mont_t.cuh
@@ -41,6 +41,7 @@ public:
     using mem_t = mont_t;
 protected:
     static const size_t n = (N+31)/32;
+    static_assert((n%2) == 0 && n >= 4, "unsupported bit length");
 private:
     uint32_t even[n];