121 Commits

Author	SHA1	Message	Date
Doug Masten	061ca99838	Optimize handling of token's Z flag bit in 6809 LZSA2 depacker	2020-06-26 14:52:09 -05:00
Doug Masten	7b96368469	Optimize match offset code in 6809 LZSA2 depacker	2020-06-26 14:42:36 -05:00
Doug Masten	e9540b2e3d	Remove unnecessary "ADDB #$18" as register B will always have this value from 6809 LZSA2 depacker	2020-06-24 00:49:09 -05:00
Doug Masten	6a47ed7f41	Remove unnecessary "ADDB #$18" as B register will always have this value from 6809 LZSA depacker	2020-06-21 12:32:54 -05:00
Doug Masten	06d63de9d7	Rearrange "CLRA" instruction for slight speed optimization in 6809 LZSA depacker	2020-06-21 12:16:07 -05:00
Doug Masten	b5b8ca556a	Rearrange match offset code to save 2 bytes in 6809 LZSA depacker	2020-06-21 01:09:15 -05:00
Doug Masten	7f0316b81c	Update code byte counts for 6809 LZSA depackers	2020-06-20 12:45:51 -05:00
Doug Masten	e8edc3242d	Restructure code to eliminate one BRA instruction in unlzsa1.s 6809 LZSA depacker	2020-06-20 12:27:31 -05:00
Doug Masten	1dd65731c4	Remove unnecessary "ADDB #$12" as B register will always have this value from 6809 LZSA depackers	2020-06-20 12:27:22 -05:00
Doug Masten	f233d552ca	Remove unnecessary "TSTB" instruction from 6809 LZSA depackers	2020-06-20 12:11:35 -05:00
Emmanuel Marty	ee969968c1	Add backward depackers for 6809	2020-06-20 14:41:25 +02:00
Emmanuel Marty	f920485899	-3 bytes for 6809 LZSA2 depacker, slightly faster	2020-06-19 20:08:09 +02:00
Emmanuel Marty	2cdeda4784	-2 bytes for 6809 LZSA1 depacker, slightly faster	2020-06-19 20:07:41 +02:00
Emmanuel Marty	f198431a71	-2 bytes for 6809 LZSA2 depacker, speed unchanged	2020-06-19 18:26:25 +02:00
Emmanuel Marty	f80706ff7e	-5 bytes and faster 6809 LZSA2 depacker	2020-06-19 12:50:10 +02:00
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