mirror of
https://github.com/ckolivas/lrzip.git
synced 2025-12-06 07:12:00 +01:00
103 lines
1.6 KiB
ArmAsm
103 lines
1.6 KiB
ArmAsm
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SECTION .text
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%macro CRC1b 0
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movzx EDX, BYTE [ESI]
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inc ESI
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movzx EBX, AL
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xor EDX, EBX
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shr EAX, 8
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xor EAX, [EBP + EDX * 4]
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dec EDI
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%endmacro
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data_size equ (28)
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crc_table equ (data_size + 4)
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align 16
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global CrcUpdateT8
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global _CrcUpdateT8
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CrcUpdateT8:
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_CrcUpdateT8:
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push EBX
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push ESI
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push EDI
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push EBP
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mov EAX, [ESP + 20]
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mov ESI, [ESP + 24]
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mov EDI, [ESP + data_size]
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mov EBP, [ESP + crc_table]
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test EDI, EDI
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jz sl_end
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sl:
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test ESI, 7
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jz sl_end
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CRC1b
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jnz sl
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sl_end:
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cmp EDI, 16
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jb NEAR crc_end
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mov [ESP + data_size], EDI
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sub EDI, 8
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and EDI, ~ 7
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sub [ESP + data_size], EDI
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add EDI, ESI
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xor EAX, [ESI]
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mov EBX, [ESI + 4]
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movzx ECX, BL
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align 16
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main_loop:
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mov EDX, [EBP + ECX*4 + 0C00h]
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movzx ECX, BH
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xor EDX, [EBP + ECX*4 + 0800h]
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shr EBX, 16
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movzx ECX, BL
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xor EDX, [EBP + ECX*4 + 0400h]
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xor EDX, [ESI + 8]
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movzx ECX, AL
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movzx EBX, BH
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xor EDX, [EBP + EBX*4 + 0000h]
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mov EBX, [ESI + 12]
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xor EDX, [EBP + ECX*4 + 01C00h]
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movzx ECX, AH
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add ESI, 8
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shr EAX, 16
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xor EDX, [EBP + ECX*4 + 01800h]
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movzx ECX, AL
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xor EDX, [EBP + ECX*4 + 01400h]
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movzx ECX, AH
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mov EAX, [EBP + ECX*4 + 01000h]
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movzx ECX, BL
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xor EAX,EDX
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cmp ESI, EDI
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jne main_loop
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xor EAX, [ESI]
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mov EDI, [ESP + data_size]
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crc_end:
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test EDI, EDI
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jz fl_end
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fl:
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CRC1b
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jnz fl
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fl_end:
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pop EBP
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pop EDI
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pop ESI
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pop EBX
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ret
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%ifidn __OUTPUT_FORMAT__,elf
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section .note.GNU-stack noalloc noexec nowrite progbits
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%endif
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