Subversion Repositories Kolibri OS

Rev

Rev 589 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
589 diamond 1 
init_crc_table:
2 
        xor     edx, edx
3 
        mov     edi, crc_table
4 
.1:
5 
        mov     ecx, 8
6 
        mov     eax, edx
7 
.2:
8 
        shr     eax, 1
9 
        jnc     @f
10 
        xor     eax, 0xEDB88320
11 
@@:
12 
        loop    .2
13 
        stosd
14 
        inc     dl
15 
        jnz     .1
16 
        ret
17 
 
6883 IgorA 18 
crc_continue:
19 
; in: eax = pervios crc, ecx = size, esi->buffer
20 
; out: eax = crc
21 
        xor     eax,-1
22 
		jmp crc.loop
23 
 
589 diamond 24 
crc:
25 
; in: ecx=size, esi->buffer
26 
; out: eax=crc
27 
        or      eax, -1
28 
        jecxz   .end
29 
.loop:
30 
        movzx   edx, al
31 
        xor     dl, byte [esi]
32 
        inc     esi
33 
        shr     eax, 8
34 
        xor     eax, [crc_table+edx*4]
35 
        loop    .loop
36 
.end:
37 
        xor     eax, -1
38 
        ret