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Big optimization by caching partial result
up to 2.45 hashes/second
This commit is contained in:
Charles Mangin
GitHub
parent
a483e1e6e8
commit
01cd5a3d16
164
HASH.s
164
HASH.s
@ -66,6 +66,8 @@
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* special temp/s0 macros: 662,220
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* LDAW, LDWADDX, LDS, inline JSRs 627,428
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* caching the result of chunk0 on pass0: 418,144
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**************************************************
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* Variables
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@ -88,33 +90,33 @@ S1 EQU $84
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TEMP0 EQU $88 ; temp storage for various operations
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TEMP1 EQU $8C ; temp storage for various operations
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HASHCACHED EQU $D0 ; is the first pass already done, and the result cached in CACHEDHASH?
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**************************************************
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* Apple Standard Memory Locations
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**************************************************
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CLRLORES EQU $F832
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LORES EQU $C050
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TXTSET EQU $C051
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MIXCLR EQU $C052
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MIXSET EQU $C053
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TXTPAGE1 EQU $C054
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TXTPAGE2 EQU $C055
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KEY EQU $C000
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C80STOREOFF EQU $C000
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C80STOREON EQU $C001
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STROBE EQU $C010
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SPEAKER EQU $C030
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VBL EQU $C02E
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RDVBLBAR EQU $C019 ; not VBL (VBL signal low
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WAIT EQU $FCA8
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RAMWRTAUX EQU $C005
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RAMWRTMAIN EQU $C004
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SETAN3 EQU $C05E ; Set annunciator-3 output to 0
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SET80VID EQU $C00D ; enable 80-column display mode (WR-only)
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HOME EQU $FC58 ; clear the text screen
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VTAB EQU $FC22 ; Sets the cursor vertical position (from CV)
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COUT EQU $FDED ; Calls the output routine whose address is stored in CSW,
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CLRLORES EQU $F832
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LORES EQU $C050
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TXTSET EQU $C051
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MIXCLR EQU $C052
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MIXSET EQU $C053
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TXTPAGE1 EQU $C054
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TXTPAGE2 EQU $C055
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KEY EQU $C000
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C80STOREOFF EQU $C000
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C80STOREON EQU $C001
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STROBE EQU $C010
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SPEAKER EQU $C030
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VBL EQU $C02E
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RDVBLBAR EQU $C019 ; not VBL (VBL signal low
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WAIT EQU $FCA8
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RAMWRTAUX EQU $C005
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RAMWRTMAIN EQU $C004
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SETAN3 EQU $C05E ; Set annunciator-3 output to 0
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SET80VID EQU $C00D ; enable 80-column display mode (WR-only)
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HOME EQU $FC58 ; clear the text screen
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VTAB EQU $FC22 ; Sets the cursor vertical position (from CV)
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COUT EQU $FDED ; Calls the output routine whose address is stored in CSW,
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;COUTI EQU $fbf0 ; normally COUTI
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CROUT EQU $FD8E ; prints CR
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@ -125,21 +127,21 @@ ALTTEXT EQU $C055
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ALTTEXTOFF EQU $C054
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PB0 EQU $C061 ; paddle 0 button. high bit set when pressed.
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PDL0 EQU $C064 ; paddle 0 value, or should I use PREAD?
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PREAD EQU $FB1E
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PB0 EQU $C061 ; paddle 0 button. high bit set when pressed.
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PDL0 EQU $C064 ; paddle 0 value, or should I use PREAD?
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PREAD EQU $FB1E
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ROMINIT EQU $FB2F
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ROMSETKBD EQU $FE89
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ROMSETVID EQU $FE93
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ROMINIT EQU $FB2F
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ROMSETKBD EQU $FE89
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ROMSETVID EQU $FE93
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ALTCHAR EQU $C00F ; enables alternative character set - mousetext
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ALTCHAR EQU $C00F ; enables alternative character set - mousetext
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CH EQU $24 ; cursor Horiz
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CV EQU $25 ; cursor Vert
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CH EQU $24 ; cursor Horiz
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CV EQU $25 ; cursor Vert
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WNDWDTH EQU $21 ; Width of text window
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WNDTOP EQU $22 ; Top of text window
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WNDWDTH EQU $21 ; Width of text window
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WNDTOP EQU $22 ; Top of text window
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**************************************************
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* START - sets up various fiddly zero page bits
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@ -149,14 +151,17 @@ WNDTOP EQU $22 ; Top of text window
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JSR HOME ; clear screen
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STA $C050 ; rw:TXTCLR ; Set Lo-res page 1, mixed graphics + text
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STA $C053 ; rw:MIXSET
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STA $C054 ; rw:TXTPAGE1
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STA $C056 ; rw:LORES
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STA $C050 ; rw:TXTCLR ; Set Lo-res page 1, mixed graphics + text
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STA $C053 ; rw:MIXSET
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STA $C054 ; rw:TXTPAGE1
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STA $C056 ; rw:LORES
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JSR FILLSCREENFAST ; blanks screen to black.
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JSR SPLASHSCREEN ; fancy lo-res graphics
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LDA #$00
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STA HASHCACHED ; clear cache status
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JSR FLIPCOIN
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; set text window to last 4 lines of GR screen.
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@ -193,6 +198,7 @@ WNDTOP EQU $22 ; Top of text window
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* break message into 512-bit chunks
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* 80byte header yields 1024bit message, so chunks = 2
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* Cache result of first chunk, so subsequent passes are cache then hash.
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PREPROCESS
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LDA #$00
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@ -222,7 +228,36 @@ INITIALHASHES
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* copy chunk into first 16 words w[0..15] of the message schedule array
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COPYCHUNKS LDA CURRENTCHUNK ; which chunk?
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COPYCHUNKS
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CHECKCACHE
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; if HASHCACHED == 1
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; AND chunk=0 AND pass=0
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; then read from CACHEDHASH
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CLC
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LDA HASHCACHED ; has chunk0 pass0 already done?
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BNE CACHEDONE
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JMP NOCACHE
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CACHEDONE LDA HASHPASS ; pass = 0
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ADC CURRENTCHUNK ; chunk = 0
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BEQ CACHETOHASH
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JMP NOCACHE
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CACHETOHASH
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]cachebyte = 0
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LUP 32
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LDA CACHEDHASH + ]cachebyte
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STA H00 + ]cachebyte
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]cachebyte = ]cachebyte+1
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--^
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JMP CHECKCHUNK
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NOCACHE
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LDA CURRENTCHUNK ; which chunk?
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BNE NEXTCHUNK ; skip chunk0 if already done
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LDA CURRENTMESSAGELO
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@ -264,7 +299,6 @@ COPYCHUNK1 LDA MESSAGE + ]chunkbyte
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**** Only does this (second chunk) on first pass.
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* Extend the first 16 words into the remaining 48 words w[16..63] of the message schedule array:
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* for i from 16 to 63
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@ -424,6 +458,8 @@ HTOV LDA H00 + ]bytenumber
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* MAIN LOOP. OPTIMIZE THIS.
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**************************************************
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COMPRESSION
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* Compression function main loop:
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@ -603,7 +639,7 @@ COMPRESSLOOP PLA ; Round 0-63 from stack
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CLC
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ADC #$01
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CMP #$40
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BEQ ADDHASH
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BEQ ADDHASH ; checks to see if we can skip or pull from cache
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JMP COMPRESS
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**************************************************
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@ -612,12 +648,12 @@ COMPRESSLOOP PLA ; Round 0-63 from stack
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* FINALIZE HASH AND OUTPUT.
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**************************************************
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ADDHASH
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* Add the compressed chunk to the current hash value:
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* h0 := h0 + Va
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* h1 := h1 + Vb
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* h2 := h2 + Vc
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@ -650,10 +686,32 @@ ADDHASH
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--^
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; if HASHCACHED == 0
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; AND chunk=0 AND pass=0
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; then write to CACHEDHASH
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CLC
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LDA HASHCACHED ; has chunk0 pass0 already done?
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ADC HASHPASS
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ADC CURRENTCHUNK
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BEQ HASHTOCACHE ; otherwise
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JMP CHECKCHUNK ; jump over and check which chunk we're doing
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HASHTOCACHE
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]cachebyte = 0
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LUP 32
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LDA H00 + ]cachebyte
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STA CACHEDHASH + ]cachebyte
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]cachebyte = ]cachebyte+1
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--^
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LDA #$01
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STA HASHCACHED ; don't repeat.
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CHECKCHUNK LDA CURRENTCHUNK
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BNE CHECKPASS ; did I just do chunk 0? INC and go back and do it again
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BNE CHECKPASS ; did I just do chunk 0? INC and go back and do second chunk.
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INC CURRENTCHUNK ; set to chunk 1
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JMP COPYCHUNKS ;
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@ -663,7 +721,7 @@ CHECKPASS LDA HASHPASS ; pass 0? set the message to the hash output and go
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JMP DIGEST
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INCHASHPASS INC HASHPASS
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INCHASHPASS INC HASHPASS ;
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HASHTOMESSAGE
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@ -818,22 +876,22 @@ LDVLDA MAC
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LDA VA + ]1 + ]1 + ]1 + ]1 +1 ; load from table pointer
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STA INPUT32+1 ; store in 32 bit "accumulator"
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LDA VA + ]1 + ]1 + ]1 + ]1 ; load from table pointer
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STA INPUT32 ; store in 32 bit "accumulator"
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LDA VA + ]1 + ]1 + ]1 + ]1 ; load from table pointer
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STA INPUT32 ; store in 32 bit "accumulator"
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<<< ; End of Macro
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LDVLDX MAC
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LDA VA + ]1 + ]1 + ]1 + ]1 +3 ; load from table pointer
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STA XREGISTER32+3 ; store in 32 bit "accumulator"
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STA XREGISTER32+3 ; store in 32 bit "accumulator"
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LDA VA + ]1 + ]1 + ]1 + ]1 +2 ; load from table pointer
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STA XREGISTER32+2 ; store in 32 bit "accumulator"
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STA XREGISTER32+2 ; store in 32 bit "accumulator"
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LDA VA + ]1 + ]1 + ]1 + ]1 +1 ; load from table pointer
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STA XREGISTER32+1 ; store in 32 bit "accumulator"
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STA XREGISTER32+1 ; store in 32 bit "accumulator"
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LDA VA + ]1 + ]1 + ]1 + ]1 ; load from table pointer
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LDA VA + ]1 + ]1 + ]1 + ]1 ; load from table pointer
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STA XREGISTER32 ; store in 32 bit "accumulator"
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<<< ; End of Macro
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@ -1956,6 +2014,8 @@ WTABLEHI DB >W00,>W01,>W02,>W03,>W04,>W05,>W06,>W07,>W08,>W09
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; Initialize hash values:
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; (first 32 bits of the fractional parts of the square roots of the first 8 primes 2..19):
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CACHEDHASH DS 32 ; storage for the first chunk of first pass. Won't change between nonce changes.
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INITIALHASH HEX 6a,09,e6,67 ; need to keep this on hand to reset after hash pass 1.
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HEX bb,67,ae,85
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HEX 3c,6e,f3,72
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