day 17 part 1 (hellishly slow)
This commit is contained in:
Lucia Ceionia
parent
ae34c01c77
commit
d1478ac425
3
17/Makefile
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3
17/Makefile
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all:
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nasm -g -felf32 main.s && ld -melf_i386 -g main.o
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143
17/input
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143
17/input
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||||||
|
$235453363477465436646567678856678577655849767566798556879779898997989755658656559688876996696676858559457557464577456788673465676535365674745$
|
||||||
|
$653557535667556645354467867774587468586488865599677669989755886567678697988757889697878875858955878776457675775448445776473464477477767663723$
|
||||||
|
$423647457774664567367567688588786455886875877685666999576569666558878966575579888958887568875959897748876746485847657558833665657763667534445$
|
||||||
|
$642244736374347334553476484454457886864876777558556996776685999679967876675775769557785885758655565867454657858447768578474753663535574334625$
|
||||||
|
$336436733375445675473664646565856555648864767887656769899695675757975675565687699957587897798858758888587654455645575843733477364463637346554$
|
||||||
|
$335435534663443676666667487578676657684784777487588895569858889859686655956678559995599665976775765566474568674477774565755333637557456443362$
|
||||||
|
$544553574555543574737357456786577646746577857444859685759965869665959565775665768787565556566764745674557877684464784337435554455363447424542$
|
||||||
|
$532466367673434664644354657754588778676755775886768666885868799568878785557855988668678578786766445778646767754547786674353344647665577622636$
|
||||||
|
$254546266574455447676333746874647468845746684454766755965578588856776657996755995866665756584754744857764888446555686474747766466477373363255$
|
||||||
|
$266564352377575777574547445766866788765476854777647777755855596796559556988877659996958566787777584545576775754474473767554467654656553554332$
|
||||||
|
$522256355666446675564456747738664767486874667675476687786478896698989959668656659687968467645876545646468576457566664435353565756335325455423$
|
||||||
|
$444323436545645543755363664545566464457866856586678787858786757778956969568579798946747584467867878657848746487767644665534735673753556344635$
|
||||||
|
$323454432324636457364755566663657568465848475587778876786656855775678985985658687848774858847777567884787865845753573673347657574545444662333$
|
||||||
|
$634265532422373635667776375763433576454587888546578776578558775467647857865566478665585765455686464585664454657577753367736355637473456622255$
|
||||||
|
$622652422623346667557377766536775386775555647476757786588468585876875775475874454678454778445754858785856648473657737554774554374752234543644$
|
||||||
|
$626444363465537553657447547553534338748756846655465484858676444775654756856447485566556646575845685575686466474566556633663543776752343555663$
|
||||||
|
$535442263436653363546357777754675735775658785476758746846756747484788667788686756847555568587746787644556655745755367533554735377434563655355$
|
||||||
|
$554342625636334436643667447345746337765466846668685587767846687654478458468576565878864858748845754784458634476773434474546454344452263624345$
|
||||||
|
$565345336254245667667673464644643655375486646848574888844888558867884754554747767566586664467557686445654336335375474476363464323325434436625$
|
||||||
|
$332442354652352554553756635666445463456537777656657588588744485464885685786874588448866685887758677684775654736344634537577646434553463233633$
|
||||||
|
$264423644454226544363333743363353543453764748557767447766744574745865865746448687884547865745856555847664474444567466455356545323344624233336$
|
||||||
|
$624364424324325525254434475736744543756757746455757545887885684854876555585578764754564576867554753746356355666473343373737424256554255423523$
|
||||||
|
$662433222232665256245775334733557673537364464544457667464687655758776565487564647678487555685857676544475746676457447467754565543233223432355$
|
||||||
|
$335526225663422356565753436745336336337473673334447858766557576685575848668868544646668474687675476677666534474734376777532524234366425532456$
|
||||||
|
$224434544223322234353647375646454645545464356533655787476846747488548474786866778666778547634433667755755733766475767655364426634454342243225$
|
||||||
|
$115343665234633546565263376447534744657646576367346453768575867668478755786458868487856743347563663553647377756353665654344434266256634336435$
|
||||||
|
$542522653445666245465264554744743545554757337454635474734676576664554868545884455857744457443343774776545543664436646636526654445346625264641$
|
||||||
|
$212345454243326345366432525643537663566453477653467557566745535745888465744676443367676664343457436353346547364465644462456633524632446434245$
|
||||||
|
$152256444334346664644636266764544353565677537647674477765463657665645367433374777437633774465675755553674563647647452223353432253226324623542$
|
||||||
|
$543314543643455255443324653447436466475546347473733756375574455574647736546663676737753633747536667644363433373577625266565562536523653263531$
|
||||||
|
$323324156556533366424334223663556664354675665737455445654473743546365645433344367436563477354677564675374746774552632626523436564364436333125$
|
||||||
|
$235252143234364223446642636543224575373637463676356753733454753456563336535346777535556775743565435544465673644434525462634226464524365541444$
|
||||||
|
$132152313563645443345466655333626644763757433545675545554636757343657777557575474647543744454353557547677667745433252345352224344346244251442$
|
||||||
|
$145324252553642322332363652223266265665333337557545545565467373344435373577653536363764744455463574577733745442455342654643644622632454545141$
|
||||||
|
$532551554325522544422365464343624222657554543453736435733353775644654357356557335773453777745644576533447446326624326254632635265444511254421$
|
||||||
|
$231415354245432533366263463246653334334533336463333665345436677477356745734756355353637773745467756534536353223454622442252244524633251135155$
|
||||||
|
$115313455335154364554632663442562633255536347755433457547673466773633747543655343555654635633737643533463222323433222456626424343225333455422$
|
||||||
|
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
|
||||||
15
17/input_test
Normal file
15
17/input_test
Normal file
@ -0,0 +1,15 @@
|
|||||||
|
$$$$$$$$$$$$$$$
|
||||||
|
$2413432311323$
|
||||||
|
$3215453535623$
|
||||||
|
$3255245654254$
|
||||||
|
$3446585845452$
|
||||||
|
$4546657867536$
|
||||||
|
$1438598798454$
|
||||||
|
$4457876987766$
|
||||||
|
$3637877979653$
|
||||||
|
$4654967986887$
|
||||||
|
$4564679986453$
|
||||||
|
$1224686865563$
|
||||||
|
$2546548887735$
|
||||||
|
$4322674655533$
|
||||||
|
$$$$$$$$$$$$$$$
|
||||||
363
17/main_part1.s
Normal file
363
17/main_part1.s
Normal file
@ -0,0 +1,363 @@
|
|||||||
|
%include "utils.s"
|
||||||
|
|
||||||
|
global _start
|
||||||
|
[bits 32]
|
||||||
|
[section .text]
|
||||||
|
|
||||||
|
; len +2 for padding
|
||||||
|
%define LINE_LEN (141+2)
|
||||||
|
%define FILENAME "input"
|
||||||
|
;%define LINE_LEN (13+2)
|
||||||
|
;%define FILENAME "input_test"
|
||||||
|
|
||||||
|
;%define DBG_PRINT
|
||||||
|
|
||||||
|
_start:
|
||||||
|
|
||||||
|
; convert input file to useful data
|
||||||
|
mov esi, file
|
||||||
|
mov edi, cost
|
||||||
|
convert_input:
|
||||||
|
lodsb
|
||||||
|
cmp al, 10 ; \n
|
||||||
|
je .cont
|
||||||
|
cmp al, '$'
|
||||||
|
jne .num
|
||||||
|
mov al, 0xFF
|
||||||
|
stosb
|
||||||
|
jmp .cont
|
||||||
|
.num:
|
||||||
|
sub al, '0'
|
||||||
|
stosb
|
||||||
|
.cont:
|
||||||
|
cmp esi, file.over
|
||||||
|
jb convert_input
|
||||||
|
|
||||||
|
; im lazy so doing dijkstra
|
||||||
|
; thanks wikipedia
|
||||||
|
|
||||||
|
; for each vertex v in Graph.Vertices:
|
||||||
|
; dist[v] ← INFINITY
|
||||||
|
; prev[v] ← UNDEFINED
|
||||||
|
; add v to Q
|
||||||
|
mov ecx, LINE_LEN*LINE_LEN*16
|
||||||
|
mov eax, 0xffffffff
|
||||||
|
mov edi, dist
|
||||||
|
rep stosd
|
||||||
|
mov ecx, LINE_LEN*LINE_LEN*16
|
||||||
|
mov eax, 0xffffffff
|
||||||
|
mov edi, prev
|
||||||
|
rep stosd
|
||||||
|
mov ecx, LINE_LEN*LINE_LEN*16
|
||||||
|
mov eax, 1
|
||||||
|
mov edi, q
|
||||||
|
rep stosb
|
||||||
|
|
||||||
|
; for all real dir:
|
||||||
|
; dist[source@dir] ← 0
|
||||||
|
mov dword [dist+((((LINE_LEN*16)+16))|0b0000)*4], 0
|
||||||
|
mov dword [dist+((((LINE_LEN*16)+16))|0b1000)*4], 0
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
; while Q is not empty and any dist[u] in Q < inf:
|
||||||
|
; u ← vertex in Q with min dist[u]
|
||||||
|
while_q:
|
||||||
|
xor ebp, ebp ; test node
|
||||||
|
mov ecx, 0xffffffff ; best dist
|
||||||
|
mov edx, 0xffffffff ; best node
|
||||||
|
.find_min:
|
||||||
|
cmp byte [q+ebp], 1
|
||||||
|
jne .cont
|
||||||
|
cmp [dist+ebp*4], ecx
|
||||||
|
cmovb ecx, [dist+ebp*4]
|
||||||
|
cmovb edx, ebp
|
||||||
|
.cont:
|
||||||
|
inc ebp
|
||||||
|
cmp ebp, LINE_LEN*LINE_LEN*16
|
||||||
|
jb .find_min
|
||||||
|
cmp ecx, 0xffffffff
|
||||||
|
je while_q_done
|
||||||
|
|
||||||
|
%ifdef DBG_PRINT
|
||||||
|
pushad
|
||||||
|
call newline
|
||||||
|
mov ebp, edx
|
||||||
|
mov eax, edx
|
||||||
|
xor edx, edx
|
||||||
|
shr eax, 4
|
||||||
|
mov ebx, LINE_LEN
|
||||||
|
div ebx
|
||||||
|
call print_dec
|
||||||
|
call space
|
||||||
|
mov eax, edx
|
||||||
|
call print_dec
|
||||||
|
call space
|
||||||
|
mov eax, ebp
|
||||||
|
and eax, 0b1111
|
||||||
|
call print_dec
|
||||||
|
call space
|
||||||
|
mov eax, ecx
|
||||||
|
call print_dec
|
||||||
|
call newline
|
||||||
|
popad
|
||||||
|
%endif
|
||||||
|
|
||||||
|
; remove u from Q
|
||||||
|
mov byte [q+edx], 0
|
||||||
|
|
||||||
|
; for each neighbor v of u still in Q:
|
||||||
|
; alt ← dist[u] + Graph.Edges(u, v)
|
||||||
|
; if alt < dist[v]:
|
||||||
|
; dist[v] ← alt
|
||||||
|
; prev[v] ← u
|
||||||
|
mov ebp, LINE_LEN*16 ; whatever
|
||||||
|
for_neighbor:
|
||||||
|
; turning neighbor 0
|
||||||
|
neighbor_0:
|
||||||
|
; neighbors += v@dir(u, ~u.dir & 0b1000)
|
||||||
|
mov ebx, edx
|
||||||
|
not ebx
|
||||||
|
and ebx, 0b1000
|
||||||
|
; tmp := 16
|
||||||
|
mov edi, 16
|
||||||
|
; bt dir, 3
|
||||||
|
bt ebx, 3
|
||||||
|
; if CF tmp := LINE_LEN
|
||||||
|
cmovc edi, ebp
|
||||||
|
; bt dir, 2
|
||||||
|
; if CF tmp := -tmp
|
||||||
|
mov esi, edi
|
||||||
|
neg esi
|
||||||
|
bt ebx, 2
|
||||||
|
cmovc edi, esi
|
||||||
|
; v := u + tmp
|
||||||
|
mov esi, edx
|
||||||
|
and esi, 0xFFFFFFF0
|
||||||
|
add edi, esi
|
||||||
|
; v.dir := dir
|
||||||
|
or edi, ebx
|
||||||
|
; alt ← dist[u] + cost(v)
|
||||||
|
; if alt < dist[v]:
|
||||||
|
; dist[v] ← alt
|
||||||
|
; prev[v] ← u
|
||||||
|
mov eax, edi
|
||||||
|
shr eax, 4
|
||||||
|
movzx eax, byte [cost+eax]
|
||||||
|
cmp al, 0xff
|
||||||
|
je neighbor_1 ; off graph
|
||||||
|
add eax, ecx
|
||||||
|
%ifdef DBG_PRINT
|
||||||
|
pushad
|
||||||
|
call space
|
||||||
|
mov esi, eax
|
||||||
|
mov eax, edi
|
||||||
|
shr eax, 4
|
||||||
|
mov ecx, LINE_LEN
|
||||||
|
xor edx, edx
|
||||||
|
div ecx
|
||||||
|
call print_dec
|
||||||
|
call space
|
||||||
|
mov eax, edx
|
||||||
|
call print_dec
|
||||||
|
call space
|
||||||
|
mov eax, edi
|
||||||
|
and eax, 0xf
|
||||||
|
call print_dec
|
||||||
|
call space
|
||||||
|
mov eax, esi
|
||||||
|
call print_dec
|
||||||
|
call newline
|
||||||
|
popad
|
||||||
|
%endif
|
||||||
|
cmp eax, [dist+edi*4]
|
||||||
|
jae neighbor_1 ; not better
|
||||||
|
mov [dist+edi*4], eax
|
||||||
|
mov [prev+edi*4], edx
|
||||||
|
; turning neighbor 1
|
||||||
|
neighbor_1:
|
||||||
|
; neighbors += v@dir(u, (~u.dir & 0b1000) | 0b0100)
|
||||||
|
mov ebx, edx
|
||||||
|
not ebx
|
||||||
|
and ebx, 0b1000
|
||||||
|
or ebx, 0b0100
|
||||||
|
; tmp := 16
|
||||||
|
mov edi, 16
|
||||||
|
; bt dir, 3
|
||||||
|
bt ebx, 3
|
||||||
|
; if CF tmp := LINE_LEN
|
||||||
|
cmovc edi, ebp
|
||||||
|
; bt dir, 2
|
||||||
|
; if CF tmp := -tmp
|
||||||
|
mov esi, edi
|
||||||
|
neg esi
|
||||||
|
bt ebx, 2
|
||||||
|
cmovc edi, esi
|
||||||
|
; v := u + tmp
|
||||||
|
mov esi, edx
|
||||||
|
and esi, 0xFFFFFFF0
|
||||||
|
add edi, esi
|
||||||
|
; v.dir := dir
|
||||||
|
or edi, ebx
|
||||||
|
; alt ← dist[u] + cost(v)
|
||||||
|
; if alt < dist[v]:
|
||||||
|
; dist[v] ← alt
|
||||||
|
; prev[v] ← u
|
||||||
|
mov eax, edi
|
||||||
|
shr eax, 4
|
||||||
|
movzx eax, byte [cost+eax]
|
||||||
|
cmp al, 0xff
|
||||||
|
je neighbor_2 ; off graph
|
||||||
|
add eax, ecx
|
||||||
|
%ifdef DBG_PRINT
|
||||||
|
pushad
|
||||||
|
call space
|
||||||
|
mov esi, eax
|
||||||
|
mov eax, edi
|
||||||
|
shr eax, 4
|
||||||
|
mov ecx, LINE_LEN
|
||||||
|
xor edx, edx
|
||||||
|
div ecx
|
||||||
|
call print_dec
|
||||||
|
call space
|
||||||
|
mov eax, edx
|
||||||
|
call print_dec
|
||||||
|
call space
|
||||||
|
mov eax, edi
|
||||||
|
and eax, 0xf
|
||||||
|
call print_dec
|
||||||
|
call space
|
||||||
|
mov eax, esi
|
||||||
|
call print_dec
|
||||||
|
call newline
|
||||||
|
popad
|
||||||
|
%endif
|
||||||
|
cmp eax, [dist+edi*4]
|
||||||
|
jae neighbor_2 ; not better
|
||||||
|
mov [dist+edi*4], eax
|
||||||
|
mov [prev+edi*4], edx
|
||||||
|
; straight - neighbor 2
|
||||||
|
neighbor_2:
|
||||||
|
; if u.dir & 0b0011 < 2
|
||||||
|
; neighbors += v@dir(u, u.dir + 1)
|
||||||
|
mov ebx, edx
|
||||||
|
and ebx, 0b0011
|
||||||
|
cmp ebx, 2
|
||||||
|
jae while_q_cont ; neighbors done
|
||||||
|
mov ebx, edx
|
||||||
|
and ebx, 0b1111
|
||||||
|
inc ebx
|
||||||
|
; tmp := 16
|
||||||
|
mov edi, 16
|
||||||
|
; bt dir, 3
|
||||||
|
bt ebx, 3
|
||||||
|
; if CF tmp := LINE_LEN
|
||||||
|
cmovc edi, ebp
|
||||||
|
; bt dir, 2
|
||||||
|
; if CF tmp := -tmp
|
||||||
|
mov esi, edi
|
||||||
|
neg esi
|
||||||
|
bt ebx, 2
|
||||||
|
cmovc edi, esi
|
||||||
|
; v := u + tmp
|
||||||
|
mov esi, edx
|
||||||
|
and esi, 0xFFFFFFF0
|
||||||
|
add edi, esi
|
||||||
|
; v.dir := dir
|
||||||
|
or edi, ebx
|
||||||
|
; alt ← dist[u] + cost(v)
|
||||||
|
; if alt < dist[v]:
|
||||||
|
; dist[v] ← alt
|
||||||
|
; prev[v] ← u
|
||||||
|
mov eax, edi
|
||||||
|
shr eax, 4
|
||||||
|
movzx eax, byte [cost+eax]
|
||||||
|
cmp al, 0xff
|
||||||
|
je while_q_cont ; off graph
|
||||||
|
add eax, ecx
|
||||||
|
%ifdef DBG_PRINT
|
||||||
|
pushad
|
||||||
|
call space
|
||||||
|
mov esi, eax
|
||||||
|
mov eax, edi
|
||||||
|
shr eax, 4
|
||||||
|
mov ecx, LINE_LEN
|
||||||
|
xor edx, edx
|
||||||
|
div ecx
|
||||||
|
call print_dec
|
||||||
|
call space
|
||||||
|
mov eax, edx
|
||||||
|
call print_dec
|
||||||
|
call space
|
||||||
|
mov eax, edi
|
||||||
|
and eax, 0xf
|
||||||
|
call print_dec
|
||||||
|
call space
|
||||||
|
mov eax, esi
|
||||||
|
call print_dec
|
||||||
|
call newline
|
||||||
|
popad
|
||||||
|
%endif
|
||||||
|
cmp eax, [dist+edi*4]
|
||||||
|
jae while_q_cont ; not better
|
||||||
|
mov [dist+edi*4], eax
|
||||||
|
mov [prev+edi*4], edx
|
||||||
|
|
||||||
|
while_q_cont:
|
||||||
|
jmp while_q
|
||||||
|
|
||||||
|
while_q_done:
|
||||||
|
|
||||||
|
call newline
|
||||||
|
|
||||||
|
; last dist values
|
||||||
|
mov eax, [dist+((((LINE_LEN-2)*(LINE_LEN*16))+((LINE_LEN-2)*16))+0b0000)*4]
|
||||||
|
call print_sign_dec
|
||||||
|
call space
|
||||||
|
mov eax, [dist+((((LINE_LEN-2)*(LINE_LEN*16))+((LINE_LEN-2)*16))+0b0001)*4]
|
||||||
|
call print_sign_dec
|
||||||
|
call space
|
||||||
|
mov eax, [dist+((((LINE_LEN-2)*(LINE_LEN*16))+((LINE_LEN-2)*16))+0b0010)*4]
|
||||||
|
call print_sign_dec
|
||||||
|
call newline
|
||||||
|
mov eax, [dist+((((LINE_LEN-2)*(LINE_LEN*16))+((LINE_LEN-2)*16))+0b0100)*4]
|
||||||
|
call print_sign_dec
|
||||||
|
call space
|
||||||
|
mov eax, [dist+((((LINE_LEN-2)*(LINE_LEN*16))+((LINE_LEN-2)*16))+0b0101)*4]
|
||||||
|
call print_sign_dec
|
||||||
|
call space
|
||||||
|
mov eax, [dist+((((LINE_LEN-2)*(LINE_LEN*16))+((LINE_LEN-2)*16))+0b0110)*4]
|
||||||
|
call print_sign_dec
|
||||||
|
call newline
|
||||||
|
mov eax, [dist+((((LINE_LEN-2)*(LINE_LEN*16))+((LINE_LEN-2)*16))+0b1000)*4]
|
||||||
|
call print_sign_dec
|
||||||
|
call space
|
||||||
|
mov eax, [dist+((((LINE_LEN-2)*(LINE_LEN*16))+((LINE_LEN-2)*16))+0b1001)*4]
|
||||||
|
call print_sign_dec
|
||||||
|
call space
|
||||||
|
mov eax, [dist+((((LINE_LEN-2)*(LINE_LEN*16))+((LINE_LEN-2)*16))+0b1010)*4]
|
||||||
|
call print_sign_dec
|
||||||
|
call newline
|
||||||
|
mov eax, [dist+((((LINE_LEN-2)*(LINE_LEN*16))+((LINE_LEN-2)*16))+0b1100)*4]
|
||||||
|
call print_sign_dec
|
||||||
|
call space
|
||||||
|
mov eax, [dist+((((LINE_LEN-2)*(LINE_LEN*16))+((LINE_LEN-2)*16))+0b1101)*4]
|
||||||
|
call print_sign_dec
|
||||||
|
call space
|
||||||
|
mov eax, [dist+((((LINE_LEN-2)*(LINE_LEN*16))+((LINE_LEN-2)*16))+0b1110)*4]
|
||||||
|
call print_sign_dec
|
||||||
|
call newline
|
||||||
|
|
||||||
|
game_over:
|
||||||
|
jmp exit
|
||||||
|
|
||||||
|
[section .data]
|
||||||
|
file: incbin FILENAME
|
||||||
|
.over:
|
||||||
|
|
||||||
|
[section .bss]
|
||||||
|
dist: resd LINE_LEN*LINE_LEN*16
|
||||||
|
prev: resd LINE_LEN*LINE_LEN*16
|
||||||
|
q: resb LINE_LEN*LINE_LEN*16
|
||||||
|
cost: resb LINE_LEN*LINE_LEN
|
||||||
|
new_file: resb len(file)
|
||||||
56
17/pseudo
Normal file
56
17/pseudo
Normal file
@ -0,0 +1,56 @@
|
|||||||
|
Graph.Edges(u@dir, v@dir) {
|
||||||
|
; if cost(v) = 0xff, we're off graph,
|
||||||
|
; in the padded area
|
||||||
|
Graph.Edges := cost(v)
|
||||||
|
}
|
||||||
|
|
||||||
|
v@dir(u, dir) {
|
||||||
|
v.dir := dir
|
||||||
|
tmp := 1
|
||||||
|
bt dir, 3
|
||||||
|
if CF
|
||||||
|
tmp := LINE_LEN
|
||||||
|
bt dir, 2
|
||||||
|
if CF
|
||||||
|
tmp := -tmp
|
||||||
|
v := u + tmp
|
||||||
|
}
|
||||||
|
|
||||||
|
neighbors(u@dir) {
|
||||||
|
; can always turn
|
||||||
|
neighbors += v@dir(u, ~u.dir & 0b1000)
|
||||||
|
neighbors += v@dir(u, (~u.dir & 0b1000) | 0b0100)
|
||||||
|
; can go forward if consec < 3
|
||||||
|
if u.dir & 0b0011 < 3
|
||||||
|
neighbors += v@dir(u, u.dir + 1)
|
||||||
|
}
|
||||||
|
|
||||||
|
; 12 possibilities, use 16 so we can do bit hacks
|
||||||
|
; 0000 0001 0010 0011 0100 0101 0110 0111
|
||||||
|
; 0 1 2 3 4 5 6 7
|
||||||
|
dir = { R1, R2, R3, XX, L1, L2, L3, XX,
|
||||||
|
; 1000 1001 1010 1011 1100 1101 1110 1111
|
||||||
|
; 8 9 10 11 12 13 14 15
|
||||||
|
D1, D2, D3, XX, U1, U2, U3, XX}
|
||||||
|
|
||||||
|
dist[(x,y),dir]
|
||||||
|
prev[(x,y),dir]
|
||||||
|
q[(x,y),dir]
|
||||||
|
|
||||||
|
for each vertex v in Graph.Vertices:
|
||||||
|
dist[v] ← INFINITY
|
||||||
|
prev[v] ← UNDEFINED
|
||||||
|
add v to Q
|
||||||
|
|
||||||
|
for all real dir:
|
||||||
|
dist[source@dir] ← 0
|
||||||
|
|
||||||
|
while Q is not empty and any dist[u] in Q < inf:
|
||||||
|
u ← vertex in Q with min dist[u]
|
||||||
|
remove u from Q
|
||||||
|
for each neighbor v of u still in Q:
|
||||||
|
alt ← dist[u] + Graph.Edges(u, v)
|
||||||
|
if alt < dist[v]:
|
||||||
|
dist[v] ← alt
|
||||||
|
prev[v] ← u
|
||||||
|
done
|
||||||
285
17/utils.s
Normal file
285
17/utils.s
Normal file
@ -0,0 +1,285 @@
|
|||||||
|
[bits 32]
|
||||||
|
[section .text]
|
||||||
|
; call # val val2
|
||||||
|
; int $0x80 eax eax edx -
|
||||||
|
;
|
||||||
|
; arg1 arg2 arg3 arg4 arg5 arg6 arg7
|
||||||
|
; ebx ecx edx esi edi ebp -
|
||||||
|
|
||||||
|
exit:
|
||||||
|
mov eax, 1 ; exit
|
||||||
|
int 0x80
|
||||||
|
|
||||||
|
; filename in EBX
|
||||||
|
; return handle in EBX
|
||||||
|
; read only
|
||||||
|
open_file:
|
||||||
|
push eax
|
||||||
|
push ecx
|
||||||
|
mov eax, 5 ; open
|
||||||
|
xor ecx, ecx ; read only
|
||||||
|
int 0x80
|
||||||
|
mov ebx, eax
|
||||||
|
pop ecx
|
||||||
|
pop eax
|
||||||
|
ret
|
||||||
|
|
||||||
|
; file handle in EBX
|
||||||
|
; buffer in ECX
|
||||||
|
; count of bytes to read in EDX
|
||||||
|
; return bytes actually read in EAX
|
||||||
|
; exits on error
|
||||||
|
read_file:
|
||||||
|
mov eax, 3 ; read
|
||||||
|
int 0x80
|
||||||
|
test eax, eax
|
||||||
|
js .err
|
||||||
|
ret
|
||||||
|
.err:
|
||||||
|
mov eax, 4 ; write
|
||||||
|
mov ebx, 1 ; stdout
|
||||||
|
mov ecx, .err_str
|
||||||
|
mov edx, 21
|
||||||
|
int 0x80
|
||||||
|
jmp exit
|
||||||
|
.err_str: db `Could not read file.\n`
|
||||||
|
|
||||||
|
; string input in ESI
|
||||||
|
; value in EAX
|
||||||
|
; CF set if none, clear if some
|
||||||
|
; ESI set past checked area
|
||||||
|
dec_parse:
|
||||||
|
push ebx
|
||||||
|
push edx
|
||||||
|
push edi
|
||||||
|
xor eax, eax
|
||||||
|
xor edi, edi
|
||||||
|
mov ebx, 10 ; base
|
||||||
|
lodsb
|
||||||
|
sub al, '0'
|
||||||
|
js .no_input
|
||||||
|
cmp al, 9
|
||||||
|
jle .got_char
|
||||||
|
.no_input:
|
||||||
|
stc ; set CF
|
||||||
|
jmp .done
|
||||||
|
.loop:
|
||||||
|
xor eax,eax
|
||||||
|
lodsb
|
||||||
|
sub al, '0'
|
||||||
|
js .dec_done
|
||||||
|
cmp al, 9
|
||||||
|
jg .dec_done
|
||||||
|
.got_char:
|
||||||
|
xchg edi,eax
|
||||||
|
mul ebx
|
||||||
|
add edi,eax
|
||||||
|
jmp .loop
|
||||||
|
.dec_done:
|
||||||
|
clc ; clear CF
|
||||||
|
.done:
|
||||||
|
mov eax,edi
|
||||||
|
pop edi
|
||||||
|
pop edx
|
||||||
|
pop ebx
|
||||||
|
ret
|
||||||
|
|
||||||
|
; string input in ESI
|
||||||
|
; value in EAX
|
||||||
|
; CF set if none, clear if some
|
||||||
|
; ESI set past checked area
|
||||||
|
sign_dec_parse:
|
||||||
|
push ebx
|
||||||
|
push ecx
|
||||||
|
push edx
|
||||||
|
push edi
|
||||||
|
xor eax, eax
|
||||||
|
xor edi, edi
|
||||||
|
xor ecx, ecx ; neg flag
|
||||||
|
mov ebx, 10 ; base
|
||||||
|
cmp byte [esi], '-'
|
||||||
|
jne .no_minus
|
||||||
|
inc esi
|
||||||
|
mov cl, 1
|
||||||
|
.no_minus:
|
||||||
|
lodsb
|
||||||
|
sub al, '0'
|
||||||
|
js .no_input
|
||||||
|
cmp al, 9
|
||||||
|
jle .got_char
|
||||||
|
.no_input:
|
||||||
|
stc ; set CF
|
||||||
|
jmp .done
|
||||||
|
.loop:
|
||||||
|
xor eax,eax
|
||||||
|
lodsb
|
||||||
|
sub al, '0'
|
||||||
|
js .dec_done
|
||||||
|
cmp al, 9
|
||||||
|
jg .dec_done
|
||||||
|
.got_char:
|
||||||
|
xchg edi,eax
|
||||||
|
mul ebx
|
||||||
|
add edi,eax
|
||||||
|
jmp .loop
|
||||||
|
.dec_done:
|
||||||
|
test ecx, ecx
|
||||||
|
jz .not_neg
|
||||||
|
neg edi
|
||||||
|
.not_neg:
|
||||||
|
clc ; clear CF
|
||||||
|
.done:
|
||||||
|
mov eax,edi
|
||||||
|
pop edi
|
||||||
|
pop edx
|
||||||
|
pop ecx
|
||||||
|
pop ebx
|
||||||
|
ret
|
||||||
|
|
||||||
|
; modifies no regs
|
||||||
|
newline:
|
||||||
|
pushad
|
||||||
|
push 10
|
||||||
|
mov eax, 4 ; write
|
||||||
|
mov ebx, 1 ; stdout
|
||||||
|
mov ecx, esp ; string
|
||||||
|
mov edx, 1 ; length
|
||||||
|
int 0x80
|
||||||
|
add esp, 4
|
||||||
|
popad
|
||||||
|
ret
|
||||||
|
; modifies no regs
|
||||||
|
space:
|
||||||
|
pushad
|
||||||
|
push 9
|
||||||
|
mov eax, 4 ; write
|
||||||
|
mov ebx, 1 ; stdout
|
||||||
|
mov ecx, esp ; string
|
||||||
|
mov edx, 1 ; length
|
||||||
|
int 0x80
|
||||||
|
add esp, 4
|
||||||
|
popad
|
||||||
|
ret
|
||||||
|
|
||||||
|
; input in EAX, all regs unmodified
|
||||||
|
print_dec:
|
||||||
|
pushad ; save regs
|
||||||
|
; max 4294967296 is 10 chars
|
||||||
|
; round to nearest 32-bit boundary
|
||||||
|
sub esp, 12
|
||||||
|
; string in ECX, length in EDX
|
||||||
|
lea ecx, [esp+11] ; last possible byte
|
||||||
|
; check for 0
|
||||||
|
test eax, eax
|
||||||
|
jz .zero
|
||||||
|
mov ebx, 10 ; base 10
|
||||||
|
xor esi, esi ; counter
|
||||||
|
.div_shit:
|
||||||
|
xor edx, edx
|
||||||
|
; divide
|
||||||
|
div ebx
|
||||||
|
dec ecx ; next char
|
||||||
|
inc esi
|
||||||
|
; store
|
||||||
|
add dl, '0'
|
||||||
|
mov byte [ecx], dl
|
||||||
|
; check if done
|
||||||
|
test eax, eax
|
||||||
|
jnz .div_shit ; continue
|
||||||
|
mov edx, esi ; counter in edx
|
||||||
|
jmp .write
|
||||||
|
.zero:
|
||||||
|
mov byte [ecx], '0'
|
||||||
|
mov edx, 1 ; length
|
||||||
|
.write:
|
||||||
|
mov eax, 4 ; write
|
||||||
|
mov ebx, 1 ; stdout
|
||||||
|
int 0x80
|
||||||
|
add esp, 12 ; restore stack
|
||||||
|
popad ; restore regs
|
||||||
|
ret
|
||||||
|
|
||||||
|
; input in EAX, all regs unmodified
|
||||||
|
print_sign_dec:
|
||||||
|
pushad ; save regs
|
||||||
|
; range -2147483648 to 2147483647 is 11 chars
|
||||||
|
; round to nearest 32-bit boundary
|
||||||
|
sub esp, 12
|
||||||
|
; string in ECX, length in EDX
|
||||||
|
lea ecx, [esp+11] ; last possible byte
|
||||||
|
; check for 0, negative
|
||||||
|
xor ebp, ebp
|
||||||
|
test eax, eax
|
||||||
|
jz .zero
|
||||||
|
jns .positive
|
||||||
|
neg eax
|
||||||
|
mov ebp, 1
|
||||||
|
.positive:
|
||||||
|
mov ebx, 10 ; base 10
|
||||||
|
xor esi, esi ; counter
|
||||||
|
.div_shit:
|
||||||
|
xor edx, edx
|
||||||
|
; divide
|
||||||
|
div ebx
|
||||||
|
dec ecx ; next char
|
||||||
|
inc esi
|
||||||
|
; store
|
||||||
|
add dl, '0'
|
||||||
|
mov byte [ecx], dl
|
||||||
|
; check if done
|
||||||
|
test eax, eax
|
||||||
|
jnz .div_shit ; continue
|
||||||
|
mov edx, esi ; counter in edx
|
||||||
|
jmp .write
|
||||||
|
.zero:
|
||||||
|
mov byte [ecx], '0'
|
||||||
|
mov edx, 1 ; length
|
||||||
|
.write:
|
||||||
|
test ebp, ebp
|
||||||
|
jz .no_minus
|
||||||
|
dec ecx
|
||||||
|
inc edx
|
||||||
|
mov byte [ecx], '-'
|
||||||
|
.no_minus:
|
||||||
|
mov eax, 4 ; write
|
||||||
|
mov ebx, 1 ; stdout
|
||||||
|
int 0x80
|
||||||
|
add esp, 12 ; restore stack
|
||||||
|
popad ; restore regs
|
||||||
|
ret
|
||||||
|
|
||||||
|
; input in ESI, len in ECX, all regs unmodified
|
||||||
|
print_string:
|
||||||
|
pushad ; save regs
|
||||||
|
mov eax, 4 ; write
|
||||||
|
mov ebx, 1 ; stdout
|
||||||
|
mov edx, ecx ; length
|
||||||
|
mov ecx, esi ; string
|
||||||
|
int 0x80
|
||||||
|
popad ; restore regs
|
||||||
|
ret
|
||||||
|
|
||||||
|
; input in AL, all regs unmodified
|
||||||
|
print_char:
|
||||||
|
pushad ; save regs
|
||||||
|
push eax
|
||||||
|
mov eax, 4 ; write
|
||||||
|
mov ebx, 1 ; stdout
|
||||||
|
mov edx, 1 ; length
|
||||||
|
mov ecx, esp ; string
|
||||||
|
int 0x80
|
||||||
|
add esp, 4
|
||||||
|
popad ; restore regs
|
||||||
|
ret
|
||||||
|
|
||||||
|
; --- MACROS ---
|
||||||
|
%define len(x) x %+ .over - x
|
||||||
|
%macro p_string 1
|
||||||
|
push esi
|
||||||
|
push ecx
|
||||||
|
mov esi, %1
|
||||||
|
mov ecx, len(%1)
|
||||||
|
call print_string
|
||||||
|
pop ecx
|
||||||
|
pop esi
|
||||||
|
%endmacro
|
||||||
Loading…
Reference in New Issue
Block a user