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ede04f0a1f
Previously windows build could only use yasm because some procedural items such as proc_start were not supported by nasm. This adds a few macros and fixes so nasm can be used to build on windows. Change-Id: Ia05dc3ff482f33b0f915bb1be3c7df5e4a753b3a Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
596 lines
14 KiB
NASM
596 lines
14 KiB
NASM
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; Copyright(c) 2011-2020 Intel Corporation All rights reserved.
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;
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; Redistribution and use in source and binary forms, with or without
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; modification, are permitted provided that the following conditions
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; are met:
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; * Redistributions of source code must retain the above copyright
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; notice, this list of conditions and the following disclaimer.
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; * Redistributions in binary form must reproduce the above copyright
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; notice, this list of conditions and the following disclaimer in
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; the documentation and/or other materials provided with the
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; distribution.
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; * Neither the name of Intel Corporation nor the names of its
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; contributors may be used to endorse or promote products derived
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; from this software without specific prior written permission.
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;
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; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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; A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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; OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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; SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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; LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;
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; Function API:
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; UINT16 crc16_t10dif_copy_by4_02(
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; UINT16 init_crc, //initial CRC value, 16 bits
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; unsigned char *dst, //buffer pointer destination for copy
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; const unsigned char *src, //buffer pointer to calculate CRC on
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; UINT64 len //buffer length in bytes (64-bit data)
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; );
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;
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; Authors:
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; Erdinc Ozturk
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; Vinodh Gopal
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; James Guilford
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;
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; Reference paper titled "Fast CRC Computation for Generic Polynomials Using PCLMULQDQ Instruction"
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; URL: http://download.intel.com/design/intarch/papers/323102.pdf
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;
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%include "reg_sizes.asm"
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%define fetch_dist 1024
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[bits 64]
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default rel
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section .text
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%ifidn __OUTPUT_FORMAT__, win64
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%xdefine arg1 rcx
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%xdefine arg2 rdx
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%xdefine arg3 r8
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%xdefine arg4 r9
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%xdefine tmp1 r10
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%xdefine arg1_low32 ecx
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%else
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%xdefine arg1 rdi
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%xdefine arg2 rsi
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%xdefine arg3 rdx
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%xdefine arg4 rcx
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%xdefine tmp1 r10
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%xdefine arg1_low32 edi
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%endif
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align 16
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mk_global crc16_t10dif_copy_by4_02, function
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crc16_t10dif_copy_by4_02:
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; adjust the 16-bit initial_crc value, scale it to 32 bits
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shl arg1_low32, 16
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; After this point, code flow is exactly same as a 32-bit CRC.
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; The only difference is before returning eax, we will shift
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; it right 16 bits, to scale back to 16 bits.
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sub rsp,16*4+8
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; push the xmm registers into the stack to maintain
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movdqa [rsp+16*2],xmm6
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movdqa [rsp+16*3],xmm7
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; check if smaller than 128B
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cmp arg4, 128
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; for sizes less than 128, we can't fold 64B at a time...
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jl _less_than_128
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; load the initial crc value
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vmovd xmm6, arg1_low32 ; initial crc
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; crc value does not need to be byte-reflected, but it needs to
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; be moved to the high part of the register.
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; because data will be byte-reflected and will align with
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; initial crc at correct place.
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vpslldq xmm6, 12
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vmovdqa xmm7, [SHUF_MASK]
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; receive the initial 64B data, xor the initial crc value
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vmovdqu xmm0, [arg3]
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vmovdqu xmm1, [arg3+16]
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vmovdqu xmm2, [arg3+32]
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vmovdqu xmm3, [arg3+48]
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; copy initial data
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vmovdqu [arg2], xmm0
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vmovdqu [arg2+16], xmm1
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vmovdqu [arg2+32], xmm2
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vmovdqu [arg2+48], xmm3
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vpshufb xmm0, xmm7
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; XOR the initial_crc value
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vpxor xmm0, xmm6
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vpshufb xmm1, xmm7
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vpshufb xmm2, xmm7
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vpshufb xmm3, xmm7
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vmovdqa xmm6, [rk3] ;xmm6 has rk3 and rk4
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;imm value of pclmulqdq instruction
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;will determine which constant to use
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; we subtract 128 instead of 64 to save one instruction from the loop
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sub arg4, 128
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; at this section of the code, there is 64*x+y (0<=y<64) bytes of
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; buffer. The _fold_64_B_loop
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; loop will fold 64B at a time until we have 64+y Bytes of buffer
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; fold 64B at a time. This section of the code folds 4 xmm
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; registers in parallel
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_fold_64_B_loop:
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; update the buffer pointer
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add arg3, 64 ; buf += 64;
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add arg2, 64
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prefetchnta [arg3+fetch_dist+0]
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vmovdqu xmm4, xmm0
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vmovdqu xmm5, xmm1
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vpclmulqdq xmm0, xmm6 , 0x11
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vpclmulqdq xmm1, xmm6 , 0x11
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vpclmulqdq xmm4, xmm6, 0x0
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vpclmulqdq xmm5, xmm6, 0x0
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vpxor xmm0, xmm4
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vpxor xmm1, xmm5
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prefetchnta [arg3+fetch_dist+32]
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vmovdqu xmm4, xmm2
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vmovdqu xmm5, xmm3
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vpclmulqdq xmm2, xmm6, 0x11
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vpclmulqdq xmm3, xmm6, 0x11
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vpclmulqdq xmm4, xmm6, 0x0
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vpclmulqdq xmm5, xmm6, 0x0
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vpxor xmm2, xmm4
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vpxor xmm3, xmm5
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vmovdqu xmm4, [arg3]
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vmovdqu xmm5, [arg3+16]
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vmovdqu [arg2], xmm4
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vmovdqu [arg2+16], xmm5
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vpshufb xmm4, xmm7
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vpshufb xmm5, xmm7
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vpxor xmm0, xmm4
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vpxor xmm1, xmm5
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vmovdqu xmm4, [arg3+32]
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vmovdqu xmm5, [arg3+48]
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vmovdqu [arg2+32], xmm4
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vmovdqu [arg2+48], xmm5
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vpshufb xmm4, xmm7
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vpshufb xmm5, xmm7
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vpxor xmm2, xmm4
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vpxor xmm3, xmm5
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sub arg4, 64
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; check if there is another 64B in the buffer to be able to fold
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jge _fold_64_B_loop
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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add arg3, 64
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add arg2, 64
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; at this point, the buffer pointer is pointing at the last y Bytes of the buffer
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; the 64B of folded data is in 4 of the xmm registers: xmm0, xmm1, xmm2, xmm3
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; fold the 4 xmm registers to 1 xmm register with different constants
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vmovdqa xmm6, [rk1] ;xmm6 has rk1 and rk2
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;imm value of pclmulqdq instruction will
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;determine which constant to use
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vmovdqa xmm4, xmm0
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vpclmulqdq xmm0, xmm6, 0x11
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vpclmulqdq xmm4, xmm6, 0x0
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vpxor xmm1, xmm4
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vpxor xmm1, xmm0
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vmovdqa xmm4, xmm1
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vpclmulqdq xmm1, xmm6, 0x11
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vpclmulqdq xmm4, xmm6, 0x0
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vpxor xmm2, xmm4
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vpxor xmm2, xmm1
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vmovdqa xmm4, xmm2
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vpclmulqdq xmm2, xmm6, 0x11
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vpclmulqdq xmm4, xmm6, 0x0
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vpxor xmm3, xmm4
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vpxor xmm3, xmm2
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; instead of 64, we add 48 to the loop counter to save 1 instruction from the loop
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; instead of a cmp instruction, we use the negative flag with the jl instruction
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add arg4, 64-16
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jl _final_reduction_for_128
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; now we have 16+y bytes left to reduce. 16 Bytes
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; is in register xmm3 and the rest is in memory
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; we can fold 16 bytes at a time if y>=16
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; continue folding 16B at a time
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_16B_reduction_loop:
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vmovdqa xmm4, xmm3
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vpclmulqdq xmm3, xmm6, 0x11
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vpclmulqdq xmm4, xmm6, 0x0
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vpxor xmm3, xmm4
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vmovdqu xmm0, [arg3]
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vmovdqu [arg2], xmm0
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vpshufb xmm0, xmm7
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vpxor xmm3, xmm0
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add arg3, 16
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add arg2, 16
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sub arg4, 16
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; instead of a cmp instruction, we utilize the flags with the jge instruction
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; equivalent of: cmp arg4, 16-16
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; check if there is any more 16B in the buffer to be able to fold
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jge _16B_reduction_loop
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;now we have 16+z bytes left to reduce, where 0<= z < 16.
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;first, we reduce the data in the xmm3 register
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_final_reduction_for_128:
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; check if any more data to fold. If not, compute the CRC of the final 128 bits
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add arg4, 16
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je _128_done
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; here we are getting data that is less than 16 bytes.
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; since we know that there was data before the pointer,
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; we can offset the input pointer before the actual point,
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; to receive exactly 16 bytes.
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; after that the registers need to be adjusted.
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_get_last_two_xmms:
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vmovdqa xmm2, xmm3
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vmovdqu xmm1, [arg3 - 16 + arg4]
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vmovdqu [arg2 - 16 + arg4], xmm1
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vpshufb xmm1, xmm7
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; get rid of the extra data that was loaded before
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; load the shift constant
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lea rax, [pshufb_shf_table + 16]
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sub rax, arg4
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vmovdqu xmm0, [rax]
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; shift xmm2 to the left by arg4 bytes
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vpshufb xmm2, xmm0
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; shift xmm3 to the right by 16-arg4 bytes
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vpxor xmm0, [mask1]
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vpshufb xmm3, xmm0
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vpblendvb xmm1, xmm1, xmm2, xmm0
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; fold 16 Bytes
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vmovdqa xmm2, xmm1
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vmovdqa xmm4, xmm3
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vpclmulqdq xmm3, xmm6, 0x11
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vpclmulqdq xmm4, xmm6, 0x0
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vpxor xmm3, xmm4
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vpxor xmm3, xmm2
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_128_done:
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; compute crc of a 128-bit value
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vmovdqa xmm6, [rk5] ; rk5 and rk6 in xmm6
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vmovdqa xmm0, xmm3
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;64b fold
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vpclmulqdq xmm3, xmm6, 0x1
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vpslldq xmm0, 8
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vpxor xmm3, xmm0
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;32b fold
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vmovdqa xmm0, xmm3
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vpand xmm0, [mask2]
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vpsrldq xmm3, 12
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vpclmulqdq xmm3, xmm6, 0x10
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vpxor xmm3, xmm0
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;barrett reduction
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_barrett:
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vmovdqa xmm6, [rk7] ; rk7 and rk8 in xmm6
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vmovdqa xmm0, xmm3
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vpclmulqdq xmm3, xmm6, 0x01
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vpslldq xmm3, 4
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vpclmulqdq xmm3, xmm6, 0x11
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vpslldq xmm3, 4
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vpxor xmm3, xmm0
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vpextrd eax, xmm3,1
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_cleanup:
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; scale the result back to 16 bits
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shr eax, 16
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vmovdqa xmm6, [rsp+16*2]
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vmovdqa xmm7, [rsp+16*3]
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add rsp,16*4+8
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ret
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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align 16
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_less_than_128:
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; check if there is enough buffer to be able to fold 16B at a time
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cmp arg4, 32
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jl _less_than_32
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vmovdqa xmm7, [SHUF_MASK]
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; if there is, load the constants
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vmovdqa xmm6, [rk1] ; rk1 and rk2 in xmm6
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vmovd xmm0, arg1_low32 ; get the initial crc value
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vpslldq xmm0, 12 ; align it to its correct place
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vmovdqu xmm3, [arg3] ; load the plaintext
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vmovdqu [arg2], xmm3 ; store copy
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vpshufb xmm3, xmm7 ; byte-reflect the plaintext
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vpxor xmm3, xmm0
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; update the buffer pointer
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add arg3, 16
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add arg2, 16
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; update the counter. subtract 32 instead of 16 to save one instruction from the loop
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sub arg4, 32
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jmp _16B_reduction_loop
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align 16
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_less_than_32:
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; mov initial crc to the return value. this is necessary for zero-length buffers.
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mov eax, arg1_low32
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test arg4, arg4
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je _cleanup
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vmovdqa xmm7, [SHUF_MASK]
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vmovd xmm0, arg1_low32 ; get the initial crc value
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vpslldq xmm0, 12 ; align it to its correct place
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cmp arg4, 16
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je _exact_16_left
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jl _less_than_16_left
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vmovdqu xmm3, [arg3] ; load the plaintext
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vmovdqu [arg2], xmm3 ; store the copy
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vpshufb xmm3, xmm7 ; byte-reflect the plaintext
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vpxor xmm3, xmm0 ; xor the initial crc value
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add arg3, 16
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add arg2, 16
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sub arg4, 16
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vmovdqa xmm6, [rk1] ; rk1 and rk2 in xmm6
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jmp _get_last_two_xmms
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align 16
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_less_than_16_left:
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; use stack space to load data less than 16 bytes, zero-out the 16B in memory first.
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vpxor xmm1, xmm1
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mov r11, rsp
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vmovdqa [r11], xmm1
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cmp arg4, 4
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jl _only_less_than_4
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; backup the counter value
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mov tmp1, arg4
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cmp arg4, 8
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jl _less_than_8_left
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; load 8 Bytes
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mov rax, [arg3]
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mov [arg2], rax
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mov [r11], rax
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add r11, 8
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sub arg4, 8
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add arg3, 8
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add arg2, 8
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_less_than_8_left:
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cmp arg4, 4
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jl _less_than_4_left
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; load 4 Bytes
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mov eax, [arg3]
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mov [arg2], eax
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mov [r11], eax
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add r11, 4
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sub arg4, 4
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add arg3, 4
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add arg2, 4
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_less_than_4_left:
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cmp arg4, 2
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jl _less_than_2_left
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; load 2 Bytes
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mov ax, [arg3]
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mov [arg2], ax
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mov [r11], ax
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add r11, 2
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sub arg4, 2
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add arg3, 2
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add arg2, 2
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_less_than_2_left:
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cmp arg4, 1
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jl _zero_left
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; load 1 Byte
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mov al, [arg3]
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mov [arg2], al
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mov [r11], al
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_zero_left:
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vmovdqa xmm3, [rsp]
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vpshufb xmm3, xmm7
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vpxor xmm3, xmm0 ; xor the initial crc value
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; shl tmp1, 4
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lea rax, [pshufb_shf_table + 16]
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sub rax, tmp1
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vmovdqu xmm0, [rax]
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vpxor xmm0, [mask1]
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vpshufb xmm3, xmm0
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jmp _128_done
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align 16
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_exact_16_left:
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vmovdqu xmm3, [arg3]
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vmovdqu [arg2], xmm3
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vpshufb xmm3, xmm7
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vpxor xmm3, xmm0 ; xor the initial crc value
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jmp _128_done
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_only_less_than_4:
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cmp arg4, 3
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jl _only_less_than_3
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; load 3 Bytes
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mov al, [arg3]
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mov [arg2], al
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mov [r11], al
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mov al, [arg3+1]
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mov [arg2+1], al
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mov [r11+1], al
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mov al, [arg3+2]
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mov [arg2+2], al
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mov [r11+2], al
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vmovdqa xmm3, [rsp]
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vpshufb xmm3, xmm7
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vpxor xmm3, xmm0 ; xor the initial crc value
|
|
|
|
vpsrldq xmm3, 5
|
|
|
|
jmp _barrett
|
|
_only_less_than_3:
|
|
cmp arg4, 2
|
|
jl _only_less_than_2
|
|
|
|
; load 2 Bytes
|
|
mov al, [arg3]
|
|
mov [arg2], al
|
|
mov [r11], al
|
|
|
|
mov al, [arg3+1]
|
|
mov [arg2+1], al
|
|
mov [r11+1], al
|
|
|
|
vmovdqa xmm3, [rsp]
|
|
vpshufb xmm3, xmm7
|
|
vpxor xmm3, xmm0 ; xor the initial crc value
|
|
|
|
vpsrldq xmm3, 6
|
|
|
|
jmp _barrett
|
|
_only_less_than_2:
|
|
|
|
; load 1 Byte
|
|
mov al, [arg3]
|
|
mov [arg2],al
|
|
mov [r11], al
|
|
|
|
vmovdqa xmm3, [rsp]
|
|
vpshufb xmm3, xmm7
|
|
vpxor xmm3, xmm0 ; xor the initial crc value
|
|
|
|
vpsrldq xmm3, 7
|
|
|
|
jmp _barrett
|
|
|
|
section .data
|
|
|
|
; precomputed constants
|
|
; these constants are precomputed from the poly: 0x8bb70000 (0x8bb7 scaled to 32 bits)
|
|
align 16
|
|
; Q = 0x18BB70000
|
|
; rk1 = 2^(32*3) mod Q << 32
|
|
; rk2 = 2^(32*5) mod Q << 32
|
|
; rk3 = 2^(32*15) mod Q << 32
|
|
; rk4 = 2^(32*17) mod Q << 32
|
|
; rk5 = 2^(32*3) mod Q << 32
|
|
; rk6 = 2^(32*2) mod Q << 32
|
|
; rk7 = floor(2^64/Q)
|
|
; rk8 = Q
|
|
rk1:
|
|
DQ 0x2d56000000000000
|
|
rk2:
|
|
DQ 0x06df000000000000
|
|
rk3:
|
|
DQ 0x044c000000000000
|
|
rk4:
|
|
DQ 0xe658000000000000
|
|
rk5:
|
|
DQ 0x2d56000000000000
|
|
rk6:
|
|
DQ 0x1368000000000000
|
|
rk7:
|
|
DQ 0x00000001f65a57f8
|
|
rk8:
|
|
DQ 0x000000018bb70000
|
|
mask1:
|
|
dq 0x8080808080808080, 0x8080808080808080
|
|
mask2:
|
|
dq 0xFFFFFFFFFFFFFFFF, 0x00000000FFFFFFFF
|
|
|
|
SHUF_MASK:
|
|
dq 0x08090A0B0C0D0E0F, 0x0001020304050607
|
|
|
|
pshufb_shf_table:
|
|
; use these values for shift constants for the pshufb instruction
|
|
; different alignments result in values as shown:
|
|
; dq 0x8887868584838281, 0x008f8e8d8c8b8a89 ; shl 15 (16-1) / shr1
|
|
; dq 0x8988878685848382, 0x01008f8e8d8c8b8a ; shl 14 (16-3) / shr2
|
|
; dq 0x8a89888786858483, 0x0201008f8e8d8c8b ; shl 13 (16-4) / shr3
|
|
; dq 0x8b8a898887868584, 0x030201008f8e8d8c ; shl 12 (16-4) / shr4
|
|
; dq 0x8c8b8a8988878685, 0x04030201008f8e8d ; shl 11 (16-5) / shr5
|
|
; dq 0x8d8c8b8a89888786, 0x0504030201008f8e ; shl 10 (16-6) / shr6
|
|
; dq 0x8e8d8c8b8a898887, 0x060504030201008f ; shl 9 (16-7) / shr7
|
|
; dq 0x8f8e8d8c8b8a8988, 0x0706050403020100 ; shl 8 (16-8) / shr8
|
|
; dq 0x008f8e8d8c8b8a89, 0x0807060504030201 ; shl 7 (16-9) / shr9
|
|
; dq 0x01008f8e8d8c8b8a, 0x0908070605040302 ; shl 6 (16-10) / shr10
|
|
; dq 0x0201008f8e8d8c8b, 0x0a09080706050403 ; shl 5 (16-11) / shr11
|
|
; dq 0x030201008f8e8d8c, 0x0b0a090807060504 ; shl 4 (16-12) / shr12
|
|
; dq 0x04030201008f8e8d, 0x0c0b0a0908070605 ; shl 3 (16-13) / shr13
|
|
; dq 0x0504030201008f8e, 0x0d0c0b0a09080706 ; shl 2 (16-14) / shr14
|
|
; dq 0x060504030201008f, 0x0e0d0c0b0a090807 ; shl 1 (16-15) / shr15
|
|
dq 0x8786858483828100, 0x8f8e8d8c8b8a8988
|
|
dq 0x0706050403020100, 0x000e0d0c0b0a0908
|