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148 lines
2.8 KiB
148 lines
2.8 KiB
; 7zCrcOpt.asm -- CRC32 calculation : optimized version
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; 2009-12-12 : Igor Pavlov : Public domain
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include 7zAsm.asm
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MY_ASM_START
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rD equ r2
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rN equ r7
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ifdef x64
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num_VAR equ r8
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table_VAR equ r9
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else
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data_size equ (REG_SIZE * 5)
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crc_table equ (REG_SIZE + data_size)
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num_VAR equ [r4 + data_size]
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table_VAR equ [r4 + crc_table]
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endif
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SRCDAT equ rN + rD + 4 *
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CRC macro op:req, dest:req, src:req, t:req
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op dest, DWORD PTR [r5 + src * 4 + 0400h * t]
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endm
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CRC_XOR macro dest:req, src:req, t:req
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CRC xor, dest, src, t
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endm
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CRC_MOV macro dest:req, src:req, t:req
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CRC mov, dest, src, t
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endm
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CRC1b macro
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movzx x6, BYTE PTR [rD]
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inc rD
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movzx x3, x0_L
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xor x6, x3
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shr x0, 8
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CRC xor, x0, r6, 0
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dec rN
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endm
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MY_PROLOG macro crc_end:req
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MY_PUSH_4_REGS
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mov x0, x1
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mov rN, num_VAR
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mov r5, table_VAR
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test rN, rN
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jz crc_end
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@@:
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test rD, 7
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jz @F
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CRC1b
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jnz @B
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@@:
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cmp rN, 16
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jb crc_end
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add rN, rD
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mov num_VAR, rN
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sub rN, 8
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and rN, NOT 7
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sub rD, rN
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xor x0, [SRCDAT 0]
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endm
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MY_EPILOG macro crc_end:req
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xor x0, [SRCDAT 0]
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mov rD, rN
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mov rN, num_VAR
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sub rN, rD
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crc_end:
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test rN, rN
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jz @F
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CRC1b
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jmp crc_end
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@@:
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MY_POP_4_REGS
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endm
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MY_PROC CrcUpdateT8, 4
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MY_PROLOG crc_end_8
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mov x1, [SRCDAT 1]
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align 16
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main_loop_8:
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mov x6, [SRCDAT 2]
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movzx x3, x1_L
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CRC_XOR x6, r3, 3
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movzx x3, x1_H
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CRC_XOR x6, r3, 2
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shr x1, 16
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movzx x3, x1_L
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movzx x1, x1_H
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CRC_XOR x6, r3, 1
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movzx x3, x0_L
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CRC_XOR x6, r1, 0
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mov x1, [SRCDAT 3]
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CRC_XOR x6, r3, 7
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movzx x3, x0_H
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shr x0, 16
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CRC_XOR x6, r3, 6
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movzx x3, x0_L
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CRC_XOR x6, r3, 5
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movzx x3, x0_H
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CRC_MOV x0, r3, 4
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xor x0, x6
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add rD, 8
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jnz main_loop_8
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MY_EPILOG crc_end_8
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MY_ENDP
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MY_PROC CrcUpdateT4, 4
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MY_PROLOG crc_end_4
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align 16
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main_loop_4:
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movzx x1, x0_L
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movzx x3, x0_H
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shr x0, 16
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movzx x6, x0_H
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and x0, 0FFh
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CRC_MOV x1, r1, 3
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xor x1, [SRCDAT 1]
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CRC_XOR x1, r3, 2
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CRC_XOR x1, r6, 0
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CRC_XOR x1, r0, 1
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movzx x0, x1_L
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movzx x3, x1_H
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shr x1, 16
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movzx x6, x1_H
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and x1, 0FFh
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CRC_MOV x0, r0, 3
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xor x0, [SRCDAT 2]
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CRC_XOR x0, r3, 2
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CRC_XOR x0, r6, 0
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CRC_XOR x0, r1, 1
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add rD, 8
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jnz main_loop_4
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MY_EPILOG crc_end_4
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MY_ENDP
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end
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