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bt_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 c4aca64dcb
commit e42013f92e
1 changed files with 4 additions and 6 deletions
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10
lib/bt_matchfinder.h
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@ -153,8 +153,7 @@ bt_matchfinder_advance_one_byte(struct bt_matchfinder * const restrict mf,
const u8 *in_next = in_base + cur_pos; const u8 *in_next = in_base + cur_pos;
u32 depth_remaining = max_search_depth; u32 depth_remaining = max_search_depth;
const s32 cutoff = cur_pos - MATCHFINDER_WINDOW_SIZE; const s32 cutoff = cur_pos - MATCHFINDER_WINDOW_SIZE;
u32 next_seq4; u32 next_hashseq;
u32 next_seq3;
u32 hash3; u32 hash3;
u32 hash4; u32 hash4;
s32 cur_node; s32 cur_node;
@ -170,14 +169,13 @@ bt_matchfinder_advance_one_byte(struct bt_matchfinder * const restrict mf,
STATIC_ASSERT(BT_MATCHFINDER_HASH3_WAYS >= 1 && STATIC_ASSERT(BT_MATCHFINDER_HASH3_WAYS >= 1 &&
BT_MATCHFINDER_HASH3_WAYS <= 2); BT_MATCHFINDER_HASH3_WAYS <= 2);
next_seq4 = load_u32_unaligned(in_next + 1); next_hashseq = get_unaligned_le32(in_next + 1);
next_seq3 = loaded_u32_to_u24(next_seq4);
hash3 = next_hashes[0]; hash3 = next_hashes[0];
hash4 = next_hashes[1]; hash4 = next_hashes[1];
next_hashes[0] = lz_hash(next_seq3, BT_MATCHFINDER_HASH3_ORDER); next_hashes[0] = lz_hash(next_hashseq & 0xFFFFFF, BT_MATCHFINDER_HASH3_ORDER);
next_hashes[1] = lz_hash(next_seq4, BT_MATCHFINDER_HASH4_ORDER); next_hashes[1] = lz_hash(next_hashseq, BT_MATCHFINDER_HASH4_ORDER);
prefetchw(&mf->hash3_tab[next_hashes[0]]); prefetchw(&mf->hash3_tab[next_hashes[0]]);
prefetchw(&mf->hash4_tab[next_hashes[1]]); prefetchw(&mf->hash4_tab[next_hashes[1]]);