6502/lzsa
1
0
Fork 0
mirror of https://github.com/emmanuel-marty/lzsa.git synced 2024-11-25 10:30:45 +00:00
Code Issues Projects Releases Wiki Activity

-1 byte

Browse Source 
Very slightly faster too
This commit is contained in:
introspec 2019-10-11 00:23:43 +01:00 committed by GitHub
parent 566e3a94e8
commit 495a12216f
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 4 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
asm/z80/unlzsa2_small.asm
View File

@ -1,11 +1,12 @@
;
; Size-optimized LZSA2 decompressor by spke & uniabis (140 bytes)
; Size-optimized LZSA2 decompressor by spke & uniabis (139 bytes)
;
; ver.00 by spke for LZSA 1.0.0 (02-09/06/2019, 145 bytes);
; ver.01 by spke for LZSA 1.0.5 (24/07/2019, added support for backward decompression);
; ver.02 by uniabis (30/07/2019, 144(-1) bytes, +3.3% speed and support for Hitachi HD64180);
; ver.03 by spke for LZSA 1.0.7 (01/08/2019, 140(-4) bytes, -1.4% speed and small re-organization of macros);
; ver.04 by spke for LZSA 1.1.0 (26/09/2019, removed usage of IY, added full revision history)
; ver.05 by spke for LZSA 1.1.1 (11/10/2019, 139(-1) bytes, +0.1% speed)
;
; The data must be compressed using the command line compressor by Emmanuel Marty
; The compression is done as follows:
@ -148,8 +149,8 @@ CASE1xx cp %11000000 : jr nc,CASE11x
CASE10x: call ReadNibble
ld d,a : ld a,c
cp %10100000 : rl d
dec d : dec d : DB #CA ; jr OffsetReadE ; #CA is JP Z,.. to skip all commands in CASE110 before jr OffsetReadE
cp %10100000 ;: rl d
dec d : rl d : DB #CA ; jr OffsetReadE ; #CA is JP Z,.. to skip all commands in CASE110 before jr OffsetReadE
CASE110: ld d,(hl) : NEXT_HL : jr OffsetReadE