104 Commits

Author	SHA1	Message	Date
Emmanuel Marty	0b540431fc	Fix comments	2019-07-14 10:12:32 +02:00
Emmanuel Marty	981b1d5925	NASM versions of Jim Leonard's speed-optimized depackers	2019-07-14 10:11:16 +02:00
Emmanuel Marty	19e8bc0468	Merge pull request #17 from MobyGamer/decompressor/8086_speed ... Time-efficient LZSA2 decompressor	2019-07-14 09:28:40 +02:00
mobygamer	c38b582e73	Time-efficient LZSA2 decompressor ... This commit provides a time-effecient LZSA2 decompressor for the 8088 (and higher) CPU. Decompression speed is roughly 50% faster than ZX7 on the same hardware.	2019-07-13 22:35:28 -05:00
Emmanuel Marty	6445d9ff6f	Merge pull request #16 from peterferrie/master - thanks! ... smaller	2019-07-12 10:34:58 +02:00
Peter Ferrie	6797fe6268	smaller	2019-07-11 17:20:38 -07:00
Emmanuel Marty	7195104c73	Merge pull request #15 from MobyGamer/decompressor/8086_speed ... Submit 8086-optimized decompressor using jump tables	2019-07-12 00:59:41 +02:00
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
Emmanuel Marty	4d7d90b893	Merge pull request #14 from MobyGamer/decompressor/8086_speed ... Additional minor speedups	2019-07-11 09:01:14 +02:00
mobygamer	638c33b432	Additional minor speedups	2019-07-11 00:58:46 -05:00
Peter Ferrie	3bfe60de44	use BYTE	2019-07-10 18:03:42 -07:00
Peter Ferrie	fb53706361	smaller	2019-07-10 18:02:27 -07:00
Emmanuel Marty	d3d62c3bf0	Use BYTE	2019-07-11 01:52:13 +02:00
Peter Ferrie	7861ef1552	smaller	2019-07-10 16:04:42 -07:00
Peter Ferrie	8e26fa9cac	smaller	2019-07-10 10:57:41 -07:00
Peter Ferrie	a1841e5e5d	smaller	2019-07-10 10:48:15 -07:00
Peter Ferrie	68339ad961	smaller	2019-07-09 18:44:37 -07:00
Peter Ferrie	15c9059adf	smaller	2019-07-09 18:30:29 -07:00
Peter Ferrie	e85cb8a5bb	smaller	2019-07-09 16:49:01 -07:00
Emmanuel Marty	467cd1970f	Merge pull request #9 from MobyGamer/decompressor/8086_speed ... Additional 1% speedup from deferring work	2019-07-09 20:42:17 +02:00
mobygamer	9a180a59f9	Additional 1% speedup from to introspec suggestions	2019-07-09 13:05:10 -05:00
Emmanuel Marty	b7b3ca1907	Merge pull request #8 from MobyGamer/decompressor/8086_speed - thank you! ... 8088-speed-optimized LZSA1 decompression	2019-07-08 09:17:51 +02:00
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
Peter Ferrie	111403c052	a little more	2019-07-07 12:05:02 -07:00
Emmanuel Marty	fe0dcf107f	Use db rather than .byte	2019-07-04 18:09:29 +02:00
Peter Ferrie	32b98f3085	a bit faster, a bit smaller	2019-07-03 19:38:27 -07:00
Emmanuel Marty	da4f6f7882	Restore CLC	2019-07-03 23:39:05 +02:00
Peter Ferrie	6f46c60259	slightly faster	2019-07-03 12:11:50 -07:00
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