From 8d80010b7bca1c28ff4c65a77f561b36992d2f54 Mon Sep 17 00:00:00 2001
From: Yann Collet <cyan@fb.com>
Date: Sat, 22 Feb 2020 10:07:01 -0800
Subject: [PATCH] fixed seed space reduction

thanks to @easyaspi314
---
 xxh3.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xxh3.h b/xxh3.h
index ec8b2a0..302e9bc 100644
--- a/xxh3.h
+++ b/xxh3.h
@@ -574,7 +574,7 @@ XXH3_len_4to8_64b(const xxh_u8* input, size_t len, const xxh_u8* secret, XXH64_h
     XXH_ASSERT(input != NULL);
     XXH_ASSERT(secret != NULL);
     XXH_ASSERT(4 <= len && len < 8);
-    seed ^= XXH_swap64(seed);
+    seed ^= seed << 32;
     {   xxh_u32 const input1 = XXH_readLE32(input);
         xxh_u32 const input2 = XXH_readLE32(input + len - 4);
         xxh_u32 const key1 = XXH_swap32(input1) ^ ((xxh_u32)(seed >> 32) + XXH_readLE32(secret));