152 Commits

Author	SHA1	Message	Date
John Brandwood	7610a965a5	Make 6502 decompress_faster_v2.asm (& v1) 3-4% faster at the cost of 1 byte.	2021-11-20 15:10:56 -05:00
introspec	e9a85e92dc	Minor edit ... Make returned values more predictable	2021-04-07 19:54:23 +01:00
introspec	004db30296	Improved "fast" Z80 decompressor for LZSA1 ... 113(+4) bytes, +5% speed	2021-04-07 19:50:12 +01:00
John Brandwood	03fd8751b0	Reorganize 6502 decompress_faster depackers for smaller size and greater speed.	2021-03-25 19:01:35 -04:00
Doug Masten	8689a42ff9	Save 10 bytes for backward HD6309 LZSA2 depacker	2020-11-20 16:55:53 -06:00
Doug Masten	4d20175edd	Save 8 bytes for backward HD6309 LZSA1 depacker	2020-11-20 16:14:18 -06:00
Emmanuel Marty	d85fc4e034	Save 1 byte/2 cycles for fast 6502 LZSA2 depacker	2020-11-07 08:41:31 +01:00
Emmanuel Marty	7ea6b63db8	Save 1 byte/2 cycles for small 6502 LZSA2 depacker	2020-11-07 00:30:35 +01:00
Emmanuel Marty	34715950fd	Add backward depackers for HD6309	2020-11-01 22:57:50 +01:00
Emmanuel Marty	27b04e8bd4	Merge pull request #50 from dougmasten/dev ... Optimization to 6809 depacker and added new H6309 version	2020-10-18 13:54:25 +02:00
Peter Ferrie	2442d6e489	not-fast 65816 version	2020-09-10 13:12:17 -07:00
Doug Masten	81f49fe430	Fix byte count for unlzsa2-6309.s in 6809 LZSA depackers	2020-07-03 22:17:20 -05:00
Doug Masten	eca750b485	Add enhanced Hitachi 6309 version to 6809 LZSA depackers	2020-07-03 22:09:11 -05:00
Doug Masten	ecb6bc5106	Tiny speed improvement to 6809 LZSA depackers ... Same space used but improved match length code by 1 cycle for M6809. On H6309 the clock cycles are the same.	2020-07-03 01:29:02 -05:00
Doug Masten	31d5dc2419	Slight speed and space improvement to nibble processing in 6809 LZSA2 depackers	2020-06-30 14:05:59 -05:00
Doug Masten	214e03555f	Slight speed improvement in 6809 LZSA depackers ... Switch instruction "tfr x,u" to "leau ,x" which is 2 clock cycles faster on M6809. On H6309 both instruction have same clock cycles.	2020-06-29 00:36:49 -05:00
Doug Masten	078edef880	Optimize match offset code in 6809 LZSA2 depacker	2020-06-27 04:17:05 -05:00
Doug Masten	03692fca2c	Update code byte counts for 6809 LZSA depackers	2020-06-27 02:02:33 -05:00
Doug Masten	39e11422ec	Delay clearing high part of literals count until we really have to in 6809 LZSA1 depacker	2020-06-27 02:02:33 -05:00
Doug Masten	fde15d3fb0	Move instruction before branch to save one byte in 6809 LZSA2 depacker	2020-06-27 02:02:33 -05:00
Doug Masten	fc8120f0da	Optimize handling of 9 bits offset in 6809 LZSA2 depacker	2020-06-27 02:02:33 -05:00
Doug Masten	c7b3ffc067	Delay clearing high part of literals count until we really have to in 6809 LZSA2 depacker	2020-06-27 02:02:33 -05:00
Doug Masten	137c6201be	One byte saving for setting reg A to $FF in 6809 LZSA2 depacker	2020-06-27 02:02:33 -05:00
Doug Masten	e397428c1f	Remove trailing whitespaces in 6809 LZSA2 depacker	2020-06-27 02:02:33 -05:00
Doug Masten	b8cfbbbc7b	Optimize handling of token's Z flag bit in 6809 LZSA2 depacker	2020-06-27 02:02:33 -05:00
Doug Masten	28ca829924	delay clearing high part of literals count until we really have to in 6809 LZSA1 depacker	2020-06-27 02:02:33 -05:00
Doug Masten	27562f4761	Restructure code to eliminate one BRA instruction from loop in 6809 LZSA1 depacker	2020-06-27 02:02:33 -05:00
Doug Masten	f72133f4cf	Move instruction before branch to save one byte in 6809 LZSA2 depacker	2020-06-26 16:48:58 -05:00
Doug Masten	56ba563794	One byte saving for setting reg A to $FF in 6809 LZSA2 depacker	2020-06-26 15:59:24 -05:00
Doug Masten	c0f09db364	Delay clearing high part of literals count until we really have to in 6809 LZSA2 depacker	2020-06-26 15:56:28 -05:00
Doug Masten	99db30a732	Optimize handling of 9 bits offset in 6809 LZSA2 depacker	2020-06-26 15:18:53 -05:00
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