mirror of
https://github.com/emmanuel-marty/lzsa.git
synced 2024-11-25 10:30:45 +00:00
hd64180 support
a bit faster, a bit smaller
This commit is contained in:
uniabis
parent
b3aae36ecc
commit
8d0528fddc
@ -1,5 +1,5 @@
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;
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; Speed-optimized LZSA decompressor by spke (v.1 03-25/04/2019, 110 bytes)
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; Speed-optimized LZSA decompressor by spke (v.1 03-25/04/2019 +patch1-30/07/2019, 109 bytes)
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;
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; The data must be compressed using the command line compressor by Emmanuel Marty
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; The compression is done as follows:
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@ -56,7 +56,7 @@
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ENDM
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MACRO ADD_OFFSET
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or a : sbc hl,de
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push hl : or a : sbc hl,de : pop de
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ENDM
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MACRO BLOCKCOPY
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@ -70,7 +70,7 @@
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ENDM
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MACRO ADD_OFFSET
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add hl,de
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ex de,hl : add hl,de
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ENDM
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MACRO BLOCKCOPY
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@ -90,8 +90,8 @@ ShortOffset: ld d,#FF : add 3 : cp 15+3 : jr nc,LongerMatch
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; placed here this saves a JP per iteration
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CopyMatch: ld c,a
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.UseC ex (sp),hl : push hl ; BC = len, DE = offset, HL = dest, SP ->[dest,src]
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ADD_OFFSET : pop de ; BC = len, DE = dest, HL = dest-offset, SP->[src]
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.UseC ex (sp),hl ; BC = len, DE = offset, HL = dest, SP ->[src]
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ADD_OFFSET ; BC = len, DE = dest, HL = dest-offset, SP->[src]
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BLOCKCOPY : pop hl ; BC = 0, DE = dest, HL = src
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ReadToken: ; first a byte token "O|LLL|MMMM" is read from the stream,
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@ -1,5 +1,5 @@
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;
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; Size-optimized LZSA decompressor by spke (v.1 23/04/2019, 69 bytes)
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; Size-optimized LZSA decompressor by spke (v.1 23/04/2019 +patch1-30/07/2019, 68 bytes)
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;
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; The data must be compressed using the command line compressor by Emmanuel Marty
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; The compression is done as follows:
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@ -56,7 +56,7 @@
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ENDM
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MACRO ADD_OFFSET
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or a : sbc hl,de
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push hl : or a : sbc hl,de : pop de
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ENDM
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MACRO BLOCKCOPY
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@ -70,7 +70,7 @@
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ENDM
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MACRO ADD_OFFSET
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add hl,de
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ex de,hl : add hl,de
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ENDM
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MACRO BLOCKCOPY
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@ -106,8 +106,8 @@ ShortOffset: and #0F : add 3 ; MMMM<15 means match lengths 0+3..14+3
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cp 15+3 : call z,ReadLongBA ; MMMM=15 means lengths 14+3+
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ld c,a
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ex (sp),hl : push hl ; BC = len, DE = -offset, HL = dest, SP ->[dest,src]
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ADD_OFFSET : pop de ; BC = len, DE = dest, HL = dest+(-offset), SP->[src]
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ex (sp),hl ; BC = len, DE = -offset, HL = dest, SP ->[src]
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ADD_OFFSET ; BC = len, DE = dest, HL = dest+(-offset), SP->[src]
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BLOCKCOPY : pop hl ; BC = 0, DE = dest, HL = src
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jr ReadToken
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@ -1,5 +1,5 @@
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;
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; Speed-optimized LZSA2 decompressor by spke (v.1 02-07/06/2019, 218 bytes)
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; Speed-optimized LZSA2 decompressor by spke (v.1 02-07/06/2019 +patch1-30/07/2019, 213/211(hd64180) bytes)
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;
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; The data must be compressed using the command line compressor by Emmanuel Marty
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; The compression is done as follows:
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@ -56,7 +56,7 @@
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ENDM
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MACRO ADD_OFFSET
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or a : sbc hl,de
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push hl : or a : sbc hl,de : pop de
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ENDM
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MACRO BLOCKCOPY
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@ -70,7 +70,7 @@
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ENDM
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MACRO ADD_OFFSET
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add hl,de
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ex de,hl : add hl,de
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ENDM
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MACRO BLOCKCOPY
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@ -79,16 +79,32 @@
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ENDIF
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IFDEF HD64180
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MACRO LD_IX_DE
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push de : pop ix
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ENDM
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MACRO LD_DE_IX
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push ix : pop de
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ENDM
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ELSE
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MACRO LD_IX_DE
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ld ixl,e : ld ixh,d
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ENDM
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MACRO LD_DE_IX
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ld e,ixl : ld d,ixh
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ENDM
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ENDIF
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@DecompressLZSA2:
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; A' stores next nibble as %1111.... or assumed to contain trash
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; B is assumed to be 0
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xor a : ld b,a : exa : jr ReadToken
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xor a : ld b,a : scf : exa : jr ReadToken
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LongerMatch: exa : jp m,.noUpdate
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LongerMatch: scf : exa : jr nc,.noUpdate
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ld a,(hl) : or #F0 : exa
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ld a,(hl) : NEXT_HL : or #0F
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@ -110,14 +126,14 @@ LongMatch: ;ld a,24 :
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ManyLiterals: ld a,18 :
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add (hl) : NEXT_HL : jr nc,CopyLiterals
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ld c,(hl) : NEXT_HL
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ld a,b : ld b,(hl) : NEXT_HL
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jr CopyLiterals.useBC
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ld a,b : ld b,(hl)
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jr ReadToken.useBC
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MoreLiterals: ld b,(hl) : NEXT_HL
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exa : jp m,.noUpdate
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scf : exa : jr nc,.noUpdate
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ld a,(hl) : or #F0 : exa
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ld a,(hl) : NEXT_HL : or #0F
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@ -148,13 +164,13 @@ CASE01x: cp %01100000 : rl d
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ReadOffsetE: ld e,(hl) : NEXT_HL
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SaveOffset: ld ixl,e : ld ixh,d
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SaveOffset: LD_IX_DE
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MatchLen: inc a : and %00000111 : jr z,LongerMatch : inc a
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CopyMatch: ld c,a
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.useC ex (sp),hl : push hl ; BC = len, DE = offset, HL = dest, SP ->[dest,src]
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ADD_OFFSET : pop de ; BC = len, DE = dest, HL = dest-offset, SP->[src]
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.useC ex (sp),hl ; BC = len, DE = offset, HL = dest, SP ->[src]
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ADD_OFFSET ; BC = len, DE = dest, HL = dest-offset, SP->[src]
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BLOCKCOPY : pop hl
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; compressed data stream contains records
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@ -164,7 +180,8 @@ ReadToken: ld a,(hl) : and %00011000 : jr z,NoLiterals
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jp pe,MoreLiterals ; 00 has already been processed; this identifies the case of 11
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rrca : rrca : rrca
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ld c,a : ld a,(hl) : NEXT_HL ; token is re-read for further processing
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ld c,a : ld a,(hl) ; token is re-read for further processing
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.useBC NEXT_HL
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BLOCKCOPY
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; the token and literals are followed by the offset
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@ -173,8 +190,8 @@ ReadToken: ld a,(hl) : and %00011000 : jr z,NoLiterals
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CASE1xx cp %11000000 : jr nc,CASE11x
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; "10x": the case of the 5-bit offset
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CASE10x: ld c,a : xor a
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exa : jp m,.noUpdate
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CASE10x: ld c,a
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exa : jr nc,.noUpdate
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ld a,(hl) : or #F0 : exa
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ld a,(hl) : NEXT_HL : or #0F
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@ -185,8 +202,8 @@ CASE10x: ld c,a : xor a
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dec d : dec d : jr ReadOffsetE
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; "00x": the case of the 5-bit offset
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CASE00x: ld c,a : xor a
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exa : jp m,.noUpdate
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CASE00x: ld c,a
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exa : jr nc,.noUpdate
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ld a,(hl) : or #F0 : exa
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ld a,(hl) : NEXT_HL : or #0F
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@ -199,7 +216,7 @@ CASE00x: ld c,a : xor a
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CASE11x cp %11100000 : jr c,CASE110
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; "111": repeated offset
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CASE111: ld e,ixl : ld d,ixh : jr MatchLen
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CASE111: LD_DE_IX : jr MatchLen
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; "110": 16-bit offset
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CASE110: ld d,(hl) : NEXT_HL : jr ReadOffsetE
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@ -1,5 +1,5 @@
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;
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; Size-optimized LZSA2 decompressor by spke (v.1 02-09/06/2019, 145 bytes)
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; Size-optimized LZSA2 decompressor by spke (v.1 02-09/06/2019 +patch1-30/07/2019, 144 bytes)
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;
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; The data must be compressed using the command line compressor by Emmanuel Marty
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; The compression is done as follows:
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@ -57,7 +57,7 @@
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ENDM
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MACRO ADD_OFFSET
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or a : sbc hl,de
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push hl : or a : sbc hl,de : pop de
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ENDM
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MACRO BLOCKCOPY
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@ -71,7 +71,7 @@
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ENDM
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MACRO ADD_OFFSET
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add hl,de
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ex de,hl : add hl,de
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ENDM
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MACRO BLOCKCOPY
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@ -80,6 +80,37 @@
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ENDIF
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IFDEF HD64180
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MACRO LD_IY_DE
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push de : pop iy
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ENDM
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MACRO LD_DE_IY
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push iy : pop de
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ENDM
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MACRO LD_IXL_A
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exx : ld l,a : exx
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ENDM
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MACRO LD_A_IXL
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exx : ld a,l : exx
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ENDM
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ELSE
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MACRO LD_IY_DE
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;push de : pop iy
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ld iyl,e : ld iyh,d
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ENDM
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MACRO LD_DE_IY
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;push iy : pop de
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ld e,iyl : ld d,iyh
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ENDM
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MACRO LD_IXL_A
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ld ixl,a
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ENDM
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MACRO LD_A_IXL
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ld a,ixl
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ENDM
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ENDIF
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@DecompressLZSA2:
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xor a : ld b,a : exa : jr ReadToken
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@ -89,16 +120,16 @@ CASE01x: cp %01100000 : rl d
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OffsetReadE: ld e,(hl) : NEXT_HL
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SaveOffset: ld iyl,e : ld iyh,d
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SaveOffset: LD_IY_DE
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MatchLen: and %00000111 : add 2 : cp 9 : call z,ExtendedCode
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CopyMatch: ld c,a
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ex (sp),hl : push hl ; BC = len, DE = offset, HL = dest, SP ->[dest,src]
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ADD_OFFSET : pop de ; BC = len, DE = dest, HL = dest-offset, SP->[src]
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ex (sp),hl ; BC = len, DE = offset, HL = dest, SP ->[src]
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ADD_OFFSET ; BC = len, DE = dest, HL = dest-offset, SP->[src]
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BLOCKCOPY : pop hl
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ReadToken: ld a,(hl) : ld ixl,a : NEXT_HL
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ReadToken: ld a,(hl) : LD_IXL_A : NEXT_HL
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and %00011000 : jr z,NoLiterals
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rrca : rrca : rrca
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@ -107,7 +138,7 @@ ReadToken: ld a,(hl) : ld ixl,a : NEXT_HL
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ld c,a
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BLOCKCOPY
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NoLiterals: push de : ld a,ixl
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NoLiterals: push de : LD_A_IXL
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or a : jp p,CASE0xx
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CASE1xx cp %11000000 : jr nc,CASE11x
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@ -123,7 +154,7 @@ CASE00x: call ReadNibble
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CASE11x cp %11100000 : jr c,CASE110
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CASE111: ld e,iyl : ld d,iyh : jr MatchLen
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CASE111: LD_DE_IY : jr MatchLen
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CASE110: ld d,(hl) : NEXT_HL : jr OffsetReadE
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