Signed-off-by: Ben Pfaff <[email protected]>
---
lib/hash.c | 17 +++++++++--------
1 files changed, 9 insertions(+), 8 deletions(-)
diff --git a/lib/hash.c b/lib/hash.c
index b3d9156..a77da7d 100644
--- a/lib/hash.c
+++ b/lib/hash.c
@@ -16,6 +16,7 @@
#include <config.h>
#include "hash.h"
#include <string.h>
+#include "unaligned.h"
/* Returns the hash of the 'n' 32-bit words at 'p', starting from 'basis'.
* 'p' must be properly aligned. */
@@ -76,21 +77,21 @@ hash_bytes(const void *p_, size_t n, uint32_t basis)
{
const uint8_t *p = p_;
uint32_t a, b, c;
- uint32_t tmp[3];
a = b = c = 0xdeadbeef + n + basis;
- while (n >= sizeof tmp) {
- memcpy(tmp, p, sizeof tmp);
- a += tmp[0];
- b += tmp[1];
- c += tmp[2];
+ while (n >= 12) {
+ a += get_unaligned_u32((uint32_t *) p);
+ b += get_unaligned_u32((uint32_t *) (p + 4));
+ c += get_unaligned_u32((uint32_t *) (p + 8));
hash_mix(&a, &b, &c);
- n -= sizeof tmp;
- p += sizeof tmp;
+ n -= 12;
+ p += 12;
}
if (n) {
+ uint32_t tmp[3];
+
tmp[0] = tmp[1] = tmp[2] = 0;
memcpy(tmp, p, n);
a += tmp[0];
--
1.7.9
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