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hc_matchfinder: produce same results on big endian CPUs

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This commit is contained in:
Eric Biggers 2017-05-29 17:38:35 -07:00
parent a53e457a5a
commit c4aca64dcb
1 changed files with 8 additions and 10 deletions
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18
lib/hc_matchfinder.h
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@ -194,7 +194,7 @@ hc_matchfinder_longest_match(struct hc_matchfinder * const restrict mf,
const u8 *best_matchptr = in_next;
mf_pos_t cur_node3, cur_node4;
u32 hash3, hash4;
u32 next_seq3, next_seq4;
u32 next_hashseq;
u32 seq4;
const u8 *matchptr;
u32 len;
@ -232,10 +232,9 @@ hc_matchfinder_longest_match(struct hc_matchfinder * const restrict mf,
mf->next_tab[cur_pos] = cur_node4;
/* Compute the next hash codes. */
next_seq4 = load_u32_unaligned(in_next + 1);
next_seq3 = loaded_u32_to_u24(next_seq4);
next_hashes[0] = lz_hash(next_seq3, HC_MATCHFINDER_HASH3_ORDER);
next_hashes[1] = lz_hash(next_seq4, HC_MATCHFINDER_HASH4_ORDER);
next_hashseq = get_unaligned_le32(in_next + 1);
next_hashes[0] = lz_hash(next_hashseq & 0xFFFFFF, HC_MATCHFINDER_HASH3_ORDER);
next_hashes[1] = lz_hash(next_hashseq, HC_MATCHFINDER_HASH4_ORDER);
prefetchw(&mf->hash3_tab[next_hashes[0]]);
prefetchw(&mf->hash4_tab[next_hashes[1]]);
@ -370,7 +369,7 @@ hc_matchfinder_skip_positions(struct hc_matchfinder * const restrict mf,
{
u32 cur_pos;
u32 hash3, hash4;
u32 next_seq3, next_seq4;
u32 next_hashseq;
u32 remaining = count;
if (unlikely(count + 5 > in_end - in_next))
@ -389,10 +388,9 @@ hc_matchfinder_skip_positions(struct hc_matchfinder * const restrict mf,
mf->next_tab[cur_pos] = mf->hash4_tab[hash4];
mf->hash4_tab[hash4] = cur_pos;
next_seq4 = load_u32_unaligned(++in_next);
next_seq3 = loaded_u32_to_u24(next_seq4);
hash3 = lz_hash(next_seq3, HC_MATCHFINDER_HASH3_ORDER);
hash4 = lz_hash(next_seq4, HC_MATCHFINDER_HASH4_ORDER);
next_hashseq = get_unaligned_le32(++in_next);
hash3 = lz_hash(next_hashseq & 0xFFFFFF, HC_MATCHFINDER_HASH3_ORDER);
hash4 = lz_hash(next_hashseq, HC_MATCHFINDER_HASH4_ORDER);
cur_pos++;
} while (--remaining);