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-2 bytes and faster 6809 LZSA1 depacker

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Emmanuel Marty 2020-06-19 12:49:46 +02:00 committed by GitHub
parent e253d3e628
commit c3b111cea6
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1 changed files with 3 additions and 4 deletions
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asm/6809/unlzsa1.s
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@ -1,4 +1,4 @@
; unlzsa1.s - 6809 decompression routine for raw LZSA1 - 121 bytes ; unlzsa1.s - 6809 decompression routine for raw LZSA1 - 119 bytes
; compress with lzsa -r <original_file> <compressed_file> ; compress with lzsa -r <original_file> <compressed_file>
; ;
; in: x = start of compressed data ; in: x = start of compressed data
@ -59,8 +59,7 @@ lz1cpylt lda ,u+ ; copy literal byte
bne lz1cpylt ; loop until all literal bytes are copied bne lz1cpylt ; loop until all literal bytes are copied
tfr u,x tfr u,x
lz1nolt puls b ; restore token lz1nolt ldb ,s ; get token again, don't pop it from the stack
pshs b ; save it again
tstb ; test O bit (small or large offset) tstb ; test O bit (small or large offset)
bmi lz1bigof bmi lz1bigof