From: Dmitry Eremin-Solenikov <dbaryshkov(a)gmail.com>
Remove last usage of unsigned long member of nettle_block16.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov(a)gmail.com>
---
gcm.c | 47 ++++++++++++-----------------------------------
1 file changed, 12 insertions(+), 35 deletions(-)
diff --git a/gcm.c b/gcm.c
index a55f603f66d5..627097b24218 100644
--- a/gcm.c
+++ b/gcm.c
@@ -133,45 +133,22 @@ shift_table[0x10] = {
static void
gcm_gf_shift_4(union nettle_block16 *x)
{
- unsigned long *w = x->w;
- unsigned long reduce;
+ uint64_t *u64 = x->u64;
+ uint64_t reduce;
/* Shift uses big-endian representation. */
#if WORDS_BIGENDIAN
-# if SIZEOF_LONG == 4
- reduce = shift_table[w[3] & 0xf];
- w[3] = (w[3] >> 4) | ((w[2] & 0xf) << 28);
- w[2] = (w[2] >> 4) | ((w[1] & 0xf) << 28);
- w[1] = (w[1] >> 4) | ((w[0] & 0xf) << 28);
- w[0] = (w[0] >> 4) ^ (reduce << 16);
-# elif SIZEOF_LONG == 8
- reduce = shift_table[w[1] & 0xf];
- w[1] = (w[1] >> 4) | ((w[0] & 0xf) << 60);
- w[0] = (w[0] >> 4) ^ (reduce << 48);
-# else
-# error Unsupported word size. */
-#endif
+ reduce = shift_table[u64[1] & 0xf];
+ u64[1] = (u64[1] >> 4) | ((u64[0] & 0xf) << 60);
+ u64[0] = (u64[0] >> 4) ^ (reduce << 48);
#else /* ! WORDS_BIGENDIAN */
-# if SIZEOF_LONG == 4
-#define RSHIFT_WORD(x) \
- ((((x) & 0xf0f0f0f0UL) >> 4) \
- | (((x) & 0x000f0f0f) << 12))
- reduce = shift_table[(w[3] >> 24) & 0xf];
- w[3] = RSHIFT_WORD(w[3]) | ((w[2] >> 20) & 0xf0);
- w[2] = RSHIFT_WORD(w[2]) | ((w[1] >> 20) & 0xf0);
- w[1] = RSHIFT_WORD(w[1]) | ((w[0] >> 20) & 0xf0);
- w[0] = RSHIFT_WORD(w[0]) ^ reduce;
-# elif SIZEOF_LONG == 8
-#define RSHIFT_WORD(x) \
- ((((x) & 0xf0f0f0f0f0f0f0f0UL) >> 4) \
- | (((x) & 0x000f0f0f0f0f0f0fUL) << 12))
- reduce = shift_table[(w[1] >> 56) & 0xf];
- w[1] = RSHIFT_WORD(w[1]) | ((w[0] >> 52) & 0xf0);
- w[0] = RSHIFT_WORD(w[0]) ^ reduce;
-# else
-# error Unsupported word size. */
-# endif
-# undef RSHIFT_WORD
+#define RSHIFT_WORD_4(x) \
+ ((((x) & UINT64_C(0xf0f0f0f0f0f0f0f0)) >> 4) \
+ | (((x) & UINT64_C(0x000f0f0f0f0f0f0f)) << 12))
+ reduce = shift_table[(u64[1] >> 56) & 0xf];
+ u64[1] = RSHIFT_WORD_4(u64[1]) | ((u64[0] >> 52) & 0xf0);
+ u64[0] = RSHIFT_WORD_4(u64[0]) ^ reduce;
+# undef RSHIFT_WORD_4
#endif /* ! WORDS_BIGENDIAN */
}
--
2.23.0.rc1
