[PATCH 1/3] OCB: remove 'int64_t' usage

[Jussi Kivilinna]

* cipher/cipher-ocb.c (double_block): Use alternative way to generate
sign-bit mask, without 'int64_t'.
--

Signed-off-by: Jussi Kivilinna <jussi.kivilinna at iki.fi>
---
 cipher/cipher-ocb.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cipher/cipher-ocb.c b/cipher/cipher-ocb.c
index 92260d2..d1f01d5 100644
--- a/cipher/cipher-ocb.c
+++ b/cipher/cipher-ocb.c
@@ -66,7 +66,7 @@ double_block (unsigned char *b)
   l = buf_get_be64 (b);
   r = buf_get_be64 (b + 8);
 
-  l_0 = (int64_t)l >> 63;
+  l_0 = -(l >> 63);
   l = (l + l) ^ (r >> 63);
   r = (r + r) ^ (l_0 & 135);