Add memory clobber

Fixes #965
2026-08-25 08:37:13 +09:00 · 2020-05-30 23:21:17 +02:00
parent 8360706c21
commit 3c49e89c19
1 changed files with 1 additions and 1 deletions
@@ -132,7 +132,7 @@ fe25519_cmov(fe25519 f, const fe25519 g, unsigned int b)
        "movq      %[t1], 32(%[a])\n"
      : [ t0 ] "=&r"(t0), [ t1 ] "=&r"(t1), [ t2 ] "=&r"(t2)
      : [ a ] "r"(f), [ b ] "r"(g), [ c ] "r"(b)
-      : "cc");
+      : "cc", "memory");
 #else
    uint64_t mask = (uint64_t) (-(int64_t) b);
    uint64_t f0, f1, f2, f3, f4;