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This commit is contained in:
Peter Ferrie 2019-07-07 12:05:02 -07:00
parent fe0dcf107f
commit 111403c052
1 changed files with 10 additions and 8 deletions
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18
asm/8088/decompress_small_v1.S
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@ -92,17 +92,13 @@ lzsa1_decompress:
lodsw ; grab 16-bit length lodsw ; grab 16-bit length
test ax,ax ; bail if we hit EOD test ax,ax ; bail if we hit EOD
jne short .got_matchlen je short .done_decompressing
.done_decompressing:
pop ax ; retrieve the original decompression offset
xchg ax,di ; compute decompressed size
sub ax,di
ret ; done
db 81H ; mask inc ah/lodsb
; (*like jmp short .got_literals but faster)
.mid_matchlen: .mid_matchlen:
lodsb ; grab single extra length byte
inc ah ; add 256 inc ah ; add 256
lodsb ; grab single extra length byte
.got_matchlen: .got_matchlen:
xchg cx,ax ; copy match length into cx xchg cx,ax ; copy match length into cx
@ -116,3 +112,9 @@ lzsa1_decompress:
xchg si,ax ; restore ds:si xchg si,ax ; restore ds:si
pop ds pop ds
jmp short .decode_token ; go decode another token jmp short .decode_token ; go decode another token
.done_decompressing:
pop ax ; retrieve the original decompression offset
xchg ax,di ; compute decompressed size
sub ax,di
ret ; done