Created
May 4, 2011 14:08
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## Wypisanie elementów tablicy do pliku / stdout | |
## - stałe systemowe - | |
.equ kernel, 0x80 | |
.equ stdout, 1 | |
.equ exit, 0x01 | |
.equ write, 0x04 | |
.equ create, 0x08 #create file function | |
.equ close, 0x06 #close file function | |
## - inne przydatne | |
.equ zero_str, '0' | |
.data | |
table: | |
.long 10,70,50,90,60,80,40,20,0,30 | |
count: | |
.long ( . - table) >> 2 # Dzielenie przez 4 (rozmiar long) | |
item_num: | |
.string " " | |
item_desc: | |
.string ". " | |
item_value: | |
.string " \n" | |
item_end: | |
ending: | |
.string "-----------\n" | |
ending_len: | |
.long (. - ending) | |
file_name: | |
.string "tablica.txt" | |
file_h: | |
.long 0 | |
file_create_error: | |
.ascii "File creation error!\n" | |
file_create_error_len: | |
.long ( . - file_create_error ) | |
.equ mode, 0x1FF #attributes for file creating ([000]111|111|111) | |
.equ item_len, (item_end - item_num) | |
.text | |
.global _start | |
_start: | |
CALL create_file | |
CALL disp_table | |
CALL sort_table_bubble | |
CALL disp_table | |
JMP quit | |
## -Funkcje-------------------------------------------------------------- | |
## Zwraca file handle na końcu stosu | |
.type create_file, @function | |
create_file: | |
MOVL $create, %eax | |
MOVL $file_name, %ebx | |
MOVL $mode, %ecx | |
INT $kernel | |
NOP | |
CMPL $0, %eax | |
JAE _create_file_no_error | |
## Błąd: | |
MOVL $write, %eax | |
MOVL $stdout, %ebx | |
MOVL $file_create_error, %ecx | |
MOVL file_create_error_len, %edx | |
INT $kernel | |
MOVL $2, %eax | |
NOP | |
_create_file_no_error: | |
MOVL %eax, file_h | |
RET | |
## Sortowanie bąbelkowe | |
.type sort_table_bubble, @function | |
sort_table_bubble: | |
## count - argument - liczba elementów | |
## edx - zewnętrzny licznik | |
## ecx - wewnętrzny licznik | |
MOVL count, %edx | |
sort_table_bubble_outer: | |
DEC %edx | |
MOVL %edx, %ecx | |
XOR %esi, %esi | |
sort_table_bubble_inner: | |
PUSH %ecx | |
PUSH %edx | |
## Właściwe sortowanie (dla każdego elementu w każdym przebiegu) | |
## esi - index aktualnego elementu | |
MOVL table(,%esi,4), %edx | |
CMPL table+4(,%esi,4), %edx | |
## Omijamy zamianę elementów | |
JB sort_table_bubble_noswap | |
sort_table_bubble_swap: | |
XCHGL table+4(,%esi,4), %edx | |
MOVL %edx, table(,%esi,4) | |
## debug | |
NOP | |
MOVL count, %edx | |
CALL disp_table | |
NOP | |
MOVL count, %edx | |
CALL disp_table | |
sort_table_bubble_noswap: | |
INC %esi | |
POP %edx | |
POP %ecx | |
LOOP sort_table_bubble_inner | |
CMPL $1, %edx | |
JNZ sort_table_bubble_outer | |
RET | |
## ## sortowanie przez wstawianie | |
## .type sort_table_pick, @function | |
## sort_table_pick: | |
## ## edi - licznik zewnętrzny | |
## ## eci - licznik wewnętrzny | |
## MOVL count, %edi | |
## MOVL %edi, %eci | |
## sort_table_pick_outer: | |
## DEC %edi | |
## sort_table_pick_inner: | |
## Wyświetlanie tableki | |
.type disp_table, @function | |
disp_table: | |
PUSH %esi | |
XOR %esi, %esi | |
MOVL count, %ecx | |
_disp_item: | |
PUSH %ecx | |
MOVL table(,%esi,4), %ebx | |
INC %esi | |
CALL makestr | |
MOVL $write, %eax | |
MOVL file_h, %ebx | |
MOVL $item_num, %ecx | |
MOVL $item_len, %edx | |
INT $kernel | |
POP %ecx | |
## Loop działa w oparciu o %ecx (dekrementuje) | |
LOOP _disp_item | |
MOVL $write, %eax | |
MOVL file_h, %ebx | |
MOVL $ending, %ecx | |
MOVL ending_len, %edx | |
INT $kernel | |
POP %esi | |
RET | |
#---------------------------------------------------------------- | |
## eax - liczba | |
## edi - miejsce w pamięci gdzie liczbę (kod ascii) wrzucić | |
## tzn tam gdzie liczba ma się skończyć. edi jest dekrementowane! | |
## przyjmujemy że index tablicy jest w %esi | |
.type makestr,@function | |
makestr: | |
MOV %esi,%eax | |
MOVL $item_num + 3,%edi | |
CALL n2str | |
MOV %ebx,%eax | |
MOVL $item_value + 4,%edi | |
CALL n2str | |
RET | |
#---------------------------------------------------------------- | |
.type n2str,@function | |
n2str: | |
PUSH %ebx | |
PUSH %edx | |
MOVL $10,%ebx | |
nextdig: | |
XOR %edx,%edx | |
DIV %ebx | |
ADDB $zero_str,%dl | |
MOVB %dl,(%edi) | |
CMPL $0,%eax | |
JZ empty | |
DEC %edi | |
JMP nextdig | |
empty: | |
POP %edx | |
POP %ebx | |
RET | |
#---------------------------------------------------------------- | |
quit: | |
MOV $exit, %eax | |
INT $kernel | |
MOVL $write, %eax | |
MOVL $stdout, %ebx | |
MOVL $item_desc, %ecx | |
MOVL $2, %edx | |
INT $kernel | |
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