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SECTION .text
%macro CRC1b 0
movzx EDX, BYTE [ESI]
inc ESI
movzx EBX, AL
xor EDX, EBX
shr EAX, 8
xor EAX, [EBP + EDX * 4]
dec EDI
%endmacro
data_size equ (28)
crc_table equ (data_size + 4)
align 16
global CrcUpdateT8
global _CrcUpdateT8
CrcUpdateT8:
_CrcUpdateT8:
push EBX
push ESI
push EDI
push EBP
mov EAX, [ESP + 20] ; CRC
mov ESI, [ESP + 24] ; buf
mov EDI, [ESP + data_size] ; size
mov EBP, [ESP + crc_table] ; tables
test EDI, EDI
jz sl_end
sl:
test ESI, 7
jz sl_end
CRC1b
jnz sl
sl_end:
cmp EDI, 16
jb NEAR crc_end
mov [ESP + data_size], EDI
sub EDI, 8
and EDI, ~ 7
sub [ESP + data_size], EDI
add EDI, ESI
xor EAX, [ESI]
mov EBX, [ESI + 4]
movzx ECX, BL
align 16
main_loop:
mov EDX, [EBP + ECX*4 + 0C00h]
movzx ECX, BH
xor EDX, [EBP + ECX*4 + 0800h]
shr EBX, 16
movzx ECX, BL
xor EDX, [EBP + ECX*4 + 0400h]
xor EDX, [ESI + 8]
movzx ECX, AL
movzx EBX, BH
xor EDX, [EBP + EBX*4 + 0000h]
mov EBX, [ESI + 12]
xor EDX, [EBP + ECX*4 + 01C00h]
movzx ECX, AH
add ESI, 8
shr EAX, 16
xor EDX, [EBP + ECX*4 + 01800h]
movzx ECX, AL
xor EDX, [EBP + ECX*4 + 01400h]
movzx ECX, AH
mov EAX, [EBP + ECX*4 + 01000h]
movzx ECX, BL
xor EAX,EDX
cmp ESI, EDI
jne main_loop
xor EAX, [ESI]
mov EDI, [ESP + data_size]
crc_end:
test EDI, EDI
jz fl_end
fl:
CRC1b
jnz fl
fl_end:
pop EBP
pop EDI
pop ESI
pop EBX
ret ; 8
; end
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