161 lines
2.3 KiB
ArmAsm
161 lines
2.3 KiB
ArmAsm
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global _start
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[bits 32]
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[section .text]
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%include "utils.s"
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_start:
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; HASH
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mov esi, file
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xor ebx, ebx ; current value
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xor edi, edi ; current label high
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xor ecx, ecx ; current label low
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mov ebp, 17 ; mul value
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hash:
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movzx eax, byte [esi]
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inc esi
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cmp al, 10
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je next_seq
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cmp al, '-'
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je minus
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cmp al, '='
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je equals
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; save label
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cmp ecx, 0x00ffffff
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ja .needs_high
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shl ecx, 8
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mov cl, al
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jmp .do_hash
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.needs_high:
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xchg eax, edi
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shl eax, 8
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mov al, cl
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xchg eax, edi
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mov cl, al
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.do_hash:
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; do HASH
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; current += new
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add eax, ebx
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; current *= 17
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mul ebp
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; current %= 256
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movzx ebx, al
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jmp hash
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; i'm not using a linked list whatever
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minus:
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; box *box = boxes+current*1024
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shl ebx, 10
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lea ebp, [ebx+boxes]
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lea ebx, [ebx+boxes+4]
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; box->max
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mov eax, [ebp]
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.find_eq:
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test eax, eax
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jz .done
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dec eax
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cmp [ebx], ecx
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jne .cont
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cmp [ebx+4], edi
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jne .cont
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xchg esi, edx
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; remove match, move others down
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mov edi, ebx
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lea esi, [ebx+12]
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; len = eax*8 + eax*4
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mov ecx, eax
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shl ecx, 3
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shl eax, 2
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add ecx, eax
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rep movsd
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xchg esi, edx
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; decrease max
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dec dword [ebp]
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jmp .done
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.cont:
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add ebx, 12
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jmp .find_eq
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.done:
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inc esi
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jmp next_seq
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equals:
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; box *box = boxes+current*1024
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shl ebx, 10
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lea ebp, [ebx+boxes]
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lea ebx, [ebx+boxes+4]
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; box->max
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mov eax, [ebp]
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.find_eq:
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test eax, eax
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jz .no_match
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dec eax
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cmp [ebx], ecx
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jne .cont
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cmp [ebx+4], edi
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jne .cont
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; update match
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mov al, [esi] ; ascii num
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sub al, '0' ; to binary
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mov [ebx+8], al
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jmp .done
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.cont:
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add ebx, 12
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jmp .find_eq
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.no_match:
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; new entry
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mov [ebx], ecx
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mov [ebx+4], edi
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mov al, [esi]
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sub al, '0'
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mov [ebx+8], al
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; inc max
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inc dword [ebp]
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.done:
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add esi, 2
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next_seq:
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xor ebx, ebx ; current value
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xor edi, edi ; current label high
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xor ecx, ecx ; current label low
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mov ebp, 17 ; mul value
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cmp esi, file.over
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jb hash
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mov esi, boxes
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calc_shit:
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cmp dword [esi], 0
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je .cont
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mov edi, esi
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sub edi, boxes
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shr edi, 10 ; box idx
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inc edi ; box num
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mov ecx, 1 ; slot num
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lea ebx, [esi+4] ; lenses
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.inner:
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mov eax, edi ; box num
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mul ecx ; slot num
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mul dword [ebx+8] ; focal length
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add [final_value], eax
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add ebx, 12
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inc ecx
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cmp ecx, [esi]
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jbe .inner
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.cont:
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add esi, 1024
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cmp esi, boxes.end
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jb calc_shit
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game_over:
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mov eax, [final_value]
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call print_dec
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call newline
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jmp exit
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[section .data]
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final_value: dd 0
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file: incbin "input"
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.over:
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[section .bss]
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boxes: resb 256*1024
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.end:
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