mobygamer
f123a6d9df
Submit 8086-optimized decompressor using jump tables
...
Because the 8086's BIU is more efficient and can read a word in
a single operation, we can skew LZSA1 decompression faster on 8086
by using a jump table to eliminate 2 comparions.
2019-07-11 17:22:29 -05:00
mobygamer
638c33b432
Additional minor speedups
2019-07-11 00:58:46 -05:00
mobygamer
9a180a59f9
Additional 1% speedup from to introspec suggestions
2019-07-09 13:05:10 -05:00
mobygamer
b0c9d61aab
8088-speed-optimized LZSA1 decompression
...
This commit contributes LZSA1 raw block format decompression code,
optimized for speed for the 8088 and higher processors. With
appropriate compression options (-f1 -m5), decompression speed is
comparable to LZ4.
2019-07-07 20:25:50 -05:00
Emmanuel Marty
8d8f50a509
Don't use 80186 opcodes. Issue #3
2019-06-27 18:32:49 +02:00
Emmanuel Marty
5a531cd4ce
Remove
2019-06-21 17:40:33 +02:00
Emmanuel Marty
d1245c7d6a
Fix small typo in z80 depackers
2019-06-21 17:39:50 +02:00
Emmanuel Marty
931f5fff9b
Add Z80 decompressors for LZSA2
2019-06-10 13:24:15 +02:00
Emmanuel Marty
435e157239
Save 3 more bytes
2019-06-08 23:59:34 +02:00
Emmanuel Marty
aab82fa022
Save 9 bytes in 6502 LZSA1 depacker
2019-06-08 23:52:18 +02:00
Emmanuel Marty
659f6c14a9
Small improvement over 6502 LZSA2 depacker
2019-06-08 16:18:36 +02:00
Emmanuel Marty
79ed7bf91e
Further update LZSA2 format; avoid name conflicts
2019-06-08 13:35:03 +02:00
Emmanuel Marty
272f2e7a29
Update LZSA2 6502 and 8088 depackers
2019-06-07 23:22:34 +02:00
emmanuel-marty
d70830b525
Simplify nibble handling in LZSA2 8088 depacker
2019-05-11 11:42:00 +02:00
emmanuel-marty
8b7b4a2b4f
Check in LZSA2 implementation (ratio competitive with ZX7, faster decompression)
2019-05-09 16:51:29 +02:00
emmanuel-marty
97dd3ffc1f
Update fast Z80 decompressor
2019-04-25 17:19:58 +02:00
emmanuel-marty
2b9780bd65
Finalize lzsa1 compressed format, speed up and simplify decompression
2019-04-24 09:47:40 +02:00
emmanuel-marty
f837ed096e
Add size-optimized Z80 decompressor, contributed by spke
2019-04-21 08:15:43 +02:00
emmanuel-marty
4c5d44fff4
Improve hotpath of 6502 depacker further
2019-04-10 19:41:41 +02:00
emmanuel-marty
8c3fc6d652
Simplify short offset handling in 6502 depacker
2019-04-10 17:37:36 +02:00
emmanuel-marty
c220694531
Add 6502 decompressor
2019-04-10 17:30:24 +02:00
emmanuel-marty
02592cfe3b
Fix typo in 8088 decompressor comments
2019-04-10 17:30:13 +02:00
emmanuel-marty
be54a4f889
Check in optimized-for-speed Z80 decompressor contributed by spke
2019-04-07 00:01:42 +02:00
emmanuel-marty
e24320b23b
Save 1 byte in 8088 decompressor
2019-04-06 00:21:15 +02:00
emmanuel-marty
a785010448
Revert token to O|LLL|MMMM; revert to always shifting the match offset by 1; set raw block end marker as a large zero-size match
2019-04-05 23:16:05 +02:00
emmanuel-marty
1ef1ad8111
Reorganize token byte for faster decoding on 8-bit CPUs, without affecting the compression ratio
2019-04-05 11:58:44 +02:00
emmanuel-marty
c7692cf688
Store 16-bit lengths and match offsets directly, to simplify decompression on 8-bit CPUs without affecting the compression ratio
2019-04-05 10:42:06 +02:00
emmanuel-marty
0744ec99de
Unpack raw blocks in 8088 decompressor
2019-04-03 13:05:32 +02:00
emmanuel-marty
06396f5ba6
Save 2 bytes in 8088 decompressor
2019-04-02 13:21:45 +02:00
marty-emmanuel
e216b0c544
Initial checkin
2019-04-01 18:04:56 +02:00
