156 Commits

Author	SHA1	Message	Date
Emmanuel Marty	c3b111cea6	-2 bytes and faster 6809 LZSA1 depacker	2020-06-19 12:49:46 +02:00
Emmanuel Marty	e253d3e628	-1 byte for 6809 LZSA2 depacker	2020-06-19 08:57:01 +02:00
Emmanuel Marty	26bf944d9f	Add 6809 depacker for LZSA2	2020-06-18 17:48:08 +02:00
Emmanuel Marty	1d0427ecae	Make 6809 depacker for LZSA1 smaller/faster	2020-06-18 17:46:42 +02:00
Emmanuel Marty	3ce9a2b36e	Add 6809 depacker for LZSA1	2020-06-18 13:26:25 +02:00
Emmanuel Marty	668204d953	Merge optimizations by Pavel Zagrebin ... Manually merge PR #44	2020-04-04 13:29:25 +02:00
Emmanuel Marty	47e54ac110	Remove unused code	2020-03-24 20:18:22 +01:00
odzhan	5fddaca0f8	compact decompressors for x86	2020-01-13 18:14:11 +00:00
Emmanuel Marty	693618f100	More asm fixes	2020-01-08 13:11:43 +01:00
Emmanuel Marty	aa122d1e05	Fix assembly when not using LZSA_SHORT_CP	2020-01-08 10:40:26 +01:00
Peter Ferrie	9f020b3605	fix typos in original code	2020-01-07 17:02:43 -08:00
Peter Ferrie	22e2f80ae7	cut one byte	2020-01-07 16:57:49 -08:00
Peter Ferrie	45b91ddaa2	fasterer v2	2020-01-06 22:24:07 -08:00
Emmanuel Marty	fb7e03030f	Merge pull request #38 from specke/master ... -2 bytes	2020-01-03 10:37:28 +01:00
Emmanuel Marty	29e8960e6f	Add faster LZSA1 6502 depacker by jbrandwood	2020-01-03 10:31:54 +01:00
Emmanuel Marty	410544f4e6	Fast 6502 LZSA2 depacker: smaller size, same speed	2020-01-03 10:01:23 +01:00
introspec	96b9933bd3	remove temporary label	2020-01-02 14:32:30 +00:00
introspec	9cd9fa5939	-2 bytes ... (same speed)	2020-01-02 14:30:00 +00:00
Emmanuel Marty	8721c11041	Add faster LZSA2 depacker by jbrandwood	2019-12-24 12:02:34 +01:00
Emmanuel Marty	a46796b6a9	Fix assembling of 6502 fast v1 depacker	2019-12-24 10:16:01 +01:00
Peter Ferrie	302234a91b	fast v2	2019-10-31 23:01:00 -07:00
Peter Ferrie	9fc9a49d67	fast v1	2019-10-31 22:20:02 -07:00
mobygamer	30192238ea	Rewrite 8088 jumptable decompressor for maximum speed ... This is a rewrite of LZSA1JMP.ASM to use a 256-element jumptable, which allows the code to handle all of the hot paths (common cases) without any branching. This not only reduces branches (which are very costly on x86) to a bare minimum, but also grants us foreknowledge in a decode path of what steps can be skipped. The new code is 12.7% faster than the old code, and assembles to less than 3K of object code and data.	2019-10-26 23:34:24 -05:00
introspec	d5d788946e	Added an option for unrolling long match copying ... Usually useless and costing +57 bytes, this option can bring dramatic performance improvements on very compressible data dominated by long matches	2019-10-22 20:11:46 +01:00
introspec	495a12216f	-1 byte ... Very slightly faster too	2019-10-11 00:23:43 +01:00
introspec	566e3a94e8	+0.2% speed ... also, added an option to unroll LDIR for longer matches (which adds 38 bytes, but can be significantly faster for files with many long matches)	2019-10-10 22:50:23 +01:00
Emmanuel Marty	6a62f7d795	Update Z80 depackers changes history	2019-09-26 11:42:52 +02:00
Emmanuel Marty	681f78d1e8	Rename	2019-09-26 07:48:59 +02:00
Emmanuel Marty	8015ab8650	Rename	2019-09-26 07:48:44 +02:00
Emmanuel Marty	2f15298343	Rename	2019-09-26 07:48:33 +02:00
Emmanuel Marty	648a308d87	Rename	2019-09-26 07:48:19 +02:00
Emmanuel Marty	587a92f4ab	Rename Z80 depackers, add version history to LZSA1	2019-09-26 07:47:43 +02:00
Emmanuel Marty	7d9135c548	Update Z80 decompressors	2019-09-25 08:09:18 +02:00
Emmanuel Marty	9de7e930e9	Faster LZSA1 z80 decompression	2019-08-27 13:16:20 +02:00
uniabis	a807344343	2bytes shorter	2019-08-22 12:55:55 +09:00
introspec	be30cae636	-1 byte ... slightly slower, but this is the size-optimized branch	2019-08-06 12:36:27 +01:00
introspec	44bff39de3	New faster and shorter decompressors ... This update is mostly about better integration of improvements by uniabis, with spke contributing several smaller size optimizations.	2019-08-01 15:07:14 +01:00
introspec	e7bb1faece	Merge branch 'master' into master	2019-07-31 23:24:30 +01:00
introspec	51ef92cdab	incorporated improvements by uniabis ... also, slightly faster decompression for fast packer in backwards mode	2019-07-31 20:42:47 +01:00
uniabis	8d0528fddc	hd64180 support ... a bit faster, a bit smaller	2019-07-31 01:39:27 +09:00
Emmanuel Marty	0a04796b19	Fix for z80 LZSA2 fast backward depacker	2019-07-27 15:39:44 +02:00
introspec	ac3bf78273	fix a bug in the backward version of unlzsa2_fast_v1.asm ... an INC HL slipped through	2019-07-27 14:14:54 +01:00
Emmanuel Marty	82edcb8bb5	Fix literal runs that are multiple of 256 bytes	2019-07-27 01:35:46 +02:00
Emmanuel Marty	ae4cc12aed	Use ACME syntax	2019-07-26 12:31:26 +02:00
Emmanuel Marty	fd70be918c	Merge pull request #19 from specke/master ... Support for -b in Z80 decompressors	2019-07-24 20:09:48 +02:00
Emmanuel Marty	4835e4c26c	Support backward decompression	2019-07-24 20:08:23 +02:00
introspec	cca79e3e59	Delete unlzsa_small_v1.asm	2019-07-24 17:31:22 +01:00
introspec	607b26d337	Delete unlzsa_fast_v1.asm	2019-07-24 17:31:14 +01:00
introspec	fd61f403ad	LZSA1 decompressors with added support for -b.	2019-07-24 17:30:37 +01:00
introspec	fcfba056d2	Add files via upload ... LZSA2 decompressors with support for -b option.	2019-07-24 17:28:39 +01:00
Emmanuel Marty	081a29a3db	Fix copying multiples of 256 bytes	2019-07-14 16:14:55 +02:00
Emmanuel Marty	710d7e05d6	Fix comments	2019-07-14 10:13:16 +02:00
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