From: Niels Möller <nisse@lysator.liu.se>
Date: Mon, 28 Nov 2022 19:03:02 +0000 (+0100)
Subject: Use bswap-internal.h and bswap64_if_le.
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=21cdfd4aeed83e1b00cb9e2aaf6533b67fd07eb1;p=thirdparty%2Fnettle.git

Use bswap-internal.h and bswap64_if_le.
---

diff --git a/ocb.c b/ocb.c
index 3a96cf0c..e3b1ae34 100644
--- a/ocb.c
+++ b/ocb.c
@@ -39,25 +39,7 @@
 
 #include "ocb.h"
 #include "block-internal.h"
-
-/* FIXME: Duplicated in nist-keywrap.c */
-#if WORDS_BIGENDIAN
-#define bswap_if_le(x) (x)
-#elif HAVE_BUILTIN_BSWAP64
-#define bswap_if_le(x) (__builtin_bswap64 (x))
-#else
-static uint64_t
-bswap_if_le (uint64_t x)
-{
-  x = ((x >> 32) & UINT64_C (0xffffffff))
-    | ((x & UINT64_C (0xffffffff)) << 32);
-  x = ((x >> 16) & UINT64_C (0xffff0000ffff))
-    | ((x & UINT64_C (0xffff0000ffff)) << 16);
-  x = ((x >> 8) & UINT64_C (0xff00ff00ff00ff))
-    | ((x & UINT64_C (0xff00ff00ff00ff)) << 8);
-  return x;
-}
-#endif
+#include "bswap-internal.h"
 
 /* Returns 64 bits from the concatenation (u0, u1), starting from bit offset. */
 static inline uint64_t
@@ -65,9 +47,9 @@ extract(uint64_t u0, uint64_t u1, unsigned offset)
 {
   if (offset == 0)
     return u0;
-  u0 = bswap_if_le(u0);
-  u1 = bswap_if_le(u1);
-  return bswap_if_le((u0 << offset) | (u1 >> (64 - offset)));
+  u0 = bswap64_if_le(u0);
+  u1 = bswap64_if_le(u1);
+  return bswap64_if_le((u0 << offset) | (u1 >> (64 - offset)));
 }
 
 void