Handle large cache lines as on s390x

ziglang · Nov 19, 2024 · fc2bdb5 · fc2bdb5
1 parent 2594399
commit fc2bdb5
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/lib/std/crypto/aes/soft.zig b/lib/std/crypto/aes/soft.zig
@@ -683,8 +683,8 @@ inline fn sbox_lookup(sbox: *align(64) const [256]u8, idx0: u8, idx1: u8, idx2:
         const stride = switch (side_channels_mitigations) {
             .none => unreachable,
             .basic => sbox.len / 4,
-            .medium => sbox.len / (sbox.len / cache_line_bytes) * 2,
-            .full => sbox.len / (sbox.len / cache_line_bytes),
+            .medium => @min(sbox.len, 2 * sbox.len / @max(1, sbox.len / cache_line_bytes)),
+            .full => sbox.len / (@max(1, sbox.len / cache_line_bytes)),
         };
         const of0 = idx0 % stride;
         const of1 = idx1 % stride;