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crc: Add new vclmul version of crc32_iscsi
Change-Id: I1c509c6ea312b6eb4e1c2c1c8bb7044f7b043e0d Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
This commit is contained in:
Greg Tucker
parent
ae45f60e78
commit
ec73d39086
@ -50,6 +50,7 @@ lsrc_x86_64 += \
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crc/crc32_ieee_by16_10.asm \
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crc/crc32_iscsi_01.asm \
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crc/crc32_iscsi_00.asm \
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crc/crc32_iscsi_by16_10.asm \
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crc/crc_multibinary.asm \
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crc/crc64_multibinary.asm \
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crc/crc64_ecma_refl_by8.asm \
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556
crc/crc32_iscsi_by16_10.asm
Normal file
556
crc/crc32_iscsi_by16_10.asm
Normal file
@ -0,0 +1,556 @@
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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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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; UINT32 crc32_iscsi_by16_10(
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; UINT32 init_crc, //initial CRC value, 32 bits
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; const unsigned char *buf, //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://www.intel.com/content/dam/www/public/us/en/documents/white-papers/fast-crc-computation-generic-polynomials-pclmulqdq-paper.pdf
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;
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;
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%include "reg_sizes.asm"
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%ifndef FUNCTION_NAME
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%define FUNCTION_NAME crc32_iscsi_by16_10
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%endif
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%if (AS_FEATURE_LEVEL) >= 10
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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 r8
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%xdefine arg2 rcx
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%xdefine arg3 rdx
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%xdefine arg1_low32 r8d
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%else
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%xdefine arg1 rdx
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%xdefine arg2 rdi
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%xdefine arg3 rsi
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%xdefine arg1_low32 edx
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%endif
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%define TMP 16*0
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%ifidn __OUTPUT_FORMAT__, win64
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%define XMM_SAVE 16*2
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%define VARIABLE_OFFSET 16*12+8
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%else
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%define VARIABLE_OFFSET 16*2+8
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%endif
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align 16
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mk_global FUNCTION_NAME, function
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FUNCTION_NAME:
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endbranch
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sub rsp, VARIABLE_OFFSET
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%ifidn __OUTPUT_FORMAT__, win64
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; push the xmm registers into the stack to maintain
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vmovdqa [rsp + XMM_SAVE + 16*0], xmm6
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vmovdqa [rsp + XMM_SAVE + 16*1], xmm7
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vmovdqa [rsp + XMM_SAVE + 16*2], xmm8
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vmovdqa [rsp + XMM_SAVE + 16*3], xmm9
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vmovdqa [rsp + XMM_SAVE + 16*4], xmm10
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vmovdqa [rsp + XMM_SAVE + 16*5], xmm11
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vmovdqa [rsp + XMM_SAVE + 16*6], xmm12
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vmovdqa [rsp + XMM_SAVE + 16*7], xmm13
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vmovdqa [rsp + XMM_SAVE + 16*8], xmm14
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vmovdqa [rsp + XMM_SAVE + 16*9], xmm15
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%endif
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; check if smaller than 256B
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cmp arg3, 256
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jl .less_than_256
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; load the initial crc value
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vmovd xmm10, arg1_low32 ; initial crc
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; receive the initial 64B data, xor the initial crc value
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vmovdqu8 zmm0, [arg2+16*0]
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vmovdqu8 zmm4, [arg2+16*4]
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vpxorq zmm0, zmm10
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vbroadcasti32x4 zmm10, [rk3] ;xmm10 has rk3 and rk4
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;imm value of pclmulqdq instruction will determine which constant to use
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sub arg3, 256
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cmp arg3, 256
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jl .fold_128_B_loop
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vmovdqu8 zmm7, [arg2+16*8]
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vmovdqu8 zmm8, [arg2+16*12]
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vbroadcasti32x4 zmm16, [rk_1] ;zmm16 has rk-1 and rk-2
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sub arg3, 256
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.fold_256_B_loop:
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add arg2, 256
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vmovdqu8 zmm3, [arg2+16*0]
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vpclmulqdq zmm1, zmm0, zmm16, 0x10
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vpclmulqdq zmm2, zmm0, zmm16, 0x01
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vpxorq zmm0, zmm1, zmm2
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vpxorq zmm0, zmm0, zmm3
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vmovdqu8 zmm9, [arg2+16*4]
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vpclmulqdq zmm5, zmm4, zmm16, 0x10
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vpclmulqdq zmm6, zmm4, zmm16, 0x01
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vpxorq zmm4, zmm5, zmm6
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vpxorq zmm4, zmm4, zmm9
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vmovdqu8 zmm11, [arg2+16*8]
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vpclmulqdq zmm12, zmm7, zmm16, 0x10
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vpclmulqdq zmm13, zmm7, zmm16, 0x01
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vpxorq zmm7, zmm12, zmm13
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vpxorq zmm7, zmm7, zmm11
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vmovdqu8 zmm17, [arg2+16*12]
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vpclmulqdq zmm14, zmm8, zmm16, 0x10
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vpclmulqdq zmm15, zmm8, zmm16, 0x01
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vpxorq zmm8, zmm14, zmm15
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vpxorq zmm8, zmm8, zmm17
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sub arg3, 256
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jge .fold_256_B_loop
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;; Fold 256 into 128
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add arg2, 256
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vpclmulqdq zmm1, zmm0, zmm10, 0x01
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vpclmulqdq zmm2, zmm0, zmm10, 0x10
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vpternlogq zmm7, zmm1, zmm2, 0x96 ; xor ABC
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vpclmulqdq zmm5, zmm4, zmm10, 0x01
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vpclmulqdq zmm6, zmm4, zmm10, 0x10
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vpternlogq zmm8, zmm5, zmm6, 0x96 ; xor ABC
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vmovdqa32 zmm0, zmm7
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vmovdqa32 zmm4, zmm8
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add arg3, 128
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jmp .fold_128_B_register
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; at this section of the code, there is 128*x+y (0<=y<128) bytes of buffer. The fold_128_B_loop
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; loop will fold 128B at a time until we have 128+y Bytes of buffer
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; fold 128B at a time. This section of the code folds 8 xmm registers in parallel
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.fold_128_B_loop:
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add arg2, 128
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vmovdqu8 zmm8, [arg2+16*0]
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vpclmulqdq zmm2, zmm0, zmm10, 0x10
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vpclmulqdq zmm1, zmm0, zmm10, 0x01
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vpxorq zmm0, zmm2, zmm1
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vpxorq zmm0, zmm0, zmm8
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vmovdqu8 zmm9, [arg2+16*4]
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vpclmulqdq zmm5, zmm4, zmm10, 0x10
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vpclmulqdq zmm6, zmm4, zmm10, 0x01
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vpxorq zmm4, zmm5, zmm6
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vpxorq zmm4, zmm4, zmm9
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sub arg3, 128
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jge .fold_128_B_loop
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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add arg2, 128
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; at this point, the buffer pointer is pointing at the last y Bytes of the buffer, where 0 <= y < 128
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; the 128B of folded data is in 8 of the xmm registers: xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7
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.fold_128_B_register:
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; fold the 8 128b parts into 1 xmm register with different constants
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vmovdqu8 zmm16, [rk9] ; multiply by rk9-rk16
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vmovdqu8 zmm11, [rk17] ; multiply by rk17-rk20, rk1,rk2, 0,0
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vpclmulqdq zmm1, zmm0, zmm16, 0x01
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vpclmulqdq zmm2, zmm0, zmm16, 0x10
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vextracti64x2 xmm7, zmm4, 3 ; save last that has no multiplicand
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vpclmulqdq zmm5, zmm4, zmm11, 0x01
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vpclmulqdq zmm6, zmm4, zmm11, 0x10
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vmovdqa xmm10, [rk1] ; Needed later in reduction loop
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vpternlogq zmm1, zmm2, zmm5, 0x96 ; xor ABC
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vpternlogq zmm1, zmm6, zmm7, 0x96 ; xor ABC
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vshufi64x2 zmm8, zmm1, zmm1, 0x4e ; Swap 1,0,3,2 - 01 00 11 10
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vpxorq ymm8, ymm8, ymm1
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vextracti64x2 xmm5, ymm8, 1
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vpxorq xmm7, xmm5, xmm8
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; instead of 128, we add 128-16 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 arg3, 128-16
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jl .final_reduction_for_128
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; now we have 16+y bytes left to reduce. 16 Bytes is in register xmm7 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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vpclmulqdq xmm8, xmm7, xmm10, 0x1
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vpclmulqdq xmm7, xmm7, xmm10, 0x10
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vpxor xmm7, xmm8
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vmovdqu xmm0, [arg2]
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vpxor xmm7, xmm0
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add arg2, 16
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sub arg3, 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 arg3, 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 xmm7 register
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.final_reduction_for_128:
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add arg3, 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, we can offset
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; the input pointer before the actual point, 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, xmm7
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vmovdqu xmm1, [arg2 - 16 + arg3]
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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]
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add rax, arg3
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vmovdqu xmm0, [rax]
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vpshufb xmm7, xmm0
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vpxor xmm0, [mask3]
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vpshufb xmm2, xmm0
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vpblendvb xmm2, xmm2, xmm1, xmm0
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;;;;;;;;;;
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vpclmulqdq xmm8, xmm7, xmm10, 0x1
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vpclmulqdq xmm7, xmm7, xmm10, 0x10
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vpxor xmm7, xmm8
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vpxor xmm7, xmm2
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.128_done:
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; compute crc of a 128-bit value
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vmovdqa xmm10, [rk5]
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vmovdqa xmm0, xmm7
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;64b fold
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vpclmulqdq xmm7, xmm10, 0
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vpsrldq xmm0, 8
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vpxor xmm7, xmm0
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;32b fold
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vmovdqa xmm0, xmm7
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vpslldq xmm7, 4
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vpclmulqdq xmm7, xmm10, 0x10
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vpxor xmm7, xmm0
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;barrett reduction
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.barrett:
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vpand xmm7, [mask2]
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vmovdqa xmm1, xmm7
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vmovdqa xmm2, xmm7
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vmovdqa xmm10, [rk7]
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vpclmulqdq xmm7, xmm10, 0
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vpxor xmm7, xmm2
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vpand xmm7, [mask]
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vmovdqa xmm2, xmm7
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vpclmulqdq xmm7, xmm10, 0x10
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vpxor xmm7, xmm2
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vpxor xmm7, xmm1
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vpextrd eax, xmm7, 2
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.cleanup:
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%ifidn __OUTPUT_FORMAT__, win64
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vmovdqa xmm6, [rsp + XMM_SAVE + 16*0]
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vmovdqa xmm7, [rsp + XMM_SAVE + 16*1]
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vmovdqa xmm8, [rsp + XMM_SAVE + 16*2]
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vmovdqa xmm9, [rsp + XMM_SAVE + 16*3]
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vmovdqa xmm10, [rsp + XMM_SAVE + 16*4]
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vmovdqa xmm11, [rsp + XMM_SAVE + 16*5]
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vmovdqa xmm12, [rsp + XMM_SAVE + 16*6]
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vmovdqa xmm13, [rsp + XMM_SAVE + 16*7]
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vmovdqa xmm14, [rsp + XMM_SAVE + 16*8]
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vmovdqa xmm15, [rsp + XMM_SAVE + 16*9]
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%endif
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add rsp, VARIABLE_OFFSET
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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_256:
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; check if there is enough buffer to be able to fold 16B at a time
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cmp arg3, 32
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jl .less_than_32
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; if there is, load the constants
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vmovdqa xmm10, [rk1] ; rk1 and rk2 in xmm10
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vmovd xmm0, arg1_low32 ; get the initial crc value
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vmovdqu xmm7, [arg2] ; load the plaintext
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vpxor xmm7, xmm0
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; update the buffer pointer
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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 arg3, 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 arg3, arg3
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je .cleanup
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vmovd xmm0, arg1_low32 ; get the initial crc value
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cmp arg3, 16
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je .exact_16_left
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jl .less_than_16_left
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vmovdqu xmm7, [arg2] ; load the plaintext
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vpxor xmm7, xmm0 ; xor the initial crc value
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add arg2, 16
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sub arg3, 16
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vmovdqa xmm10, [rk1] ; rk1 and rk2 in xmm10
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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 arg3, 4
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jl .only_less_than_4
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; backup the counter value
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mov r9, arg3
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cmp arg3, 8
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jl .less_than_8_left
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; load 8 Bytes
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mov rax, [arg2]
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mov [r11], rax
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add r11, 8
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sub arg3, 8
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add arg2, 8
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.less_than_8_left:
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cmp arg3, 4
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jl .less_than_4_left
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; load 4 Bytes
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mov eax, [arg2]
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mov [r11], eax
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add r11, 4
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sub arg3, 4
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add arg2, 4
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.less_than_4_left:
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cmp arg3, 2
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jl .less_than_2_left
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; load 2 Bytes
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mov ax, [arg2]
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mov [r11], ax
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add r11, 2
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sub arg3, 2
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add arg2, 2
|
||||
.less_than_2_left:
|
||||
cmp arg3, 1
|
||||
jl .zero_left
|
||||
|
||||
; load 1 Byte
|
||||
mov al, [arg2]
|
||||
mov [r11], al
|
||||
|
||||
.zero_left:
|
||||
vmovdqa xmm7, [rsp]
|
||||
vpxor xmm7, xmm0 ; xor the initial crc value
|
||||
|
||||
lea rax,[pshufb_shf_table]
|
||||
vmovdqu xmm0, [rax + r9]
|
||||
vpshufb xmm7,xmm0
|
||||
jmp .128_done
|
||||
|
||||
align 16
|
||||
.exact_16_left:
|
||||
vmovdqu xmm7, [arg2]
|
||||
vpxor xmm7, xmm0 ; xor the initial crc value
|
||||
jmp .128_done
|
||||
|
||||
.only_less_than_4:
|
||||
cmp arg3, 3
|
||||
jl .only_less_than_3
|
||||
|
||||
; load 3 Bytes
|
||||
mov al, [arg2]
|
||||
mov [r11], al
|
||||
|
||||
mov al, [arg2+1]
|
||||
mov [r11+1], al
|
||||
|
||||
mov al, [arg2+2]
|
||||
mov [r11+2], al
|
||||
|
||||
vmovdqa xmm7, [rsp]
|
||||
vpxor xmm7, xmm0 ; xor the initial crc value
|
||||
|
||||
vpslldq xmm7, 5
|
||||
jmp .barrett
|
||||
|
||||
.only_less_than_3:
|
||||
cmp arg3, 2
|
||||
jl .only_less_than_2
|
||||
|
||||
; load 2 Bytes
|
||||
mov al, [arg2]
|
||||
mov [r11], al
|
||||
|
||||
mov al, [arg2+1]
|
||||
mov [r11+1], al
|
||||
|
||||
vmovdqa xmm7, [rsp]
|
||||
vpxor xmm7, xmm0 ; xor the initial crc value
|
||||
|
||||
vpslldq xmm7, 6
|
||||
jmp .barrett
|
||||
|
||||
.only_less_than_2:
|
||||
; load 1 Byte
|
||||
mov al, [arg2]
|
||||
mov [r11], al
|
||||
|
||||
vmovdqa xmm7, [rsp]
|
||||
vpxor xmm7, xmm0 ; xor the initial crc value
|
||||
|
||||
vpslldq xmm7, 7
|
||||
jmp .barrett
|
||||
|
||||
section .data
|
||||
align 32
|
||||
|
||||
%ifndef USE_CONSTS
|
||||
; precomputed constants
|
||||
rk_1: dq 0x00000000b9e02b86
|
||||
rk_2: dq 0x00000000dcb17aa4
|
||||
rk1: dq 0x00000000493c7d27
|
||||
rk2: dq 0x0000000ec1068c50
|
||||
rk3: dq 0x0000000206e38d70
|
||||
rk4: dq 0x000000006992cea2
|
||||
rk5: dq 0x00000000493c7d27
|
||||
rk6: dq 0x00000000dd45aab8
|
||||
rk7: dq 0x00000000dea713f0
|
||||
rk8: dq 0x0000000105ec76f0
|
||||
rk9: dq 0x0000000047db8317
|
||||
rk10: dq 0x000000002ad91c30
|
||||
rk11: dq 0x000000000715ce53
|
||||
rk12: dq 0x00000000c49f4f67
|
||||
rk13: dq 0x0000000039d3b296
|
||||
rk14: dq 0x00000000083a6eec
|
||||
rk15: dq 0x000000009e4addf8
|
||||
rk16: dq 0x00000000740eef02
|
||||
rk17: dq 0x00000000ddc0152b
|
||||
rk18: dq 0x000000001c291d04
|
||||
rk19: dq 0x00000000ba4fc28e
|
||||
rk20: dq 0x000000003da6d0cb
|
||||
|
||||
rk_1b: dq 0x00000000493c7d27
|
||||
rk_2b: dq 0x0000000ec1068c50
|
||||
dq 0x0000000000000000
|
||||
dq 0x0000000000000000
|
||||
|
||||
%else
|
||||
INCLUDE_CONSTS
|
||||
%endif
|
||||
|
||||
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
|
||||
|
||||
mask: dq 0xFFFFFFFFFFFFFFFF, 0x0000000000000000
|
||||
mask2: dq 0xFFFFFFFF00000000, 0xFFFFFFFFFFFFFFFF
|
||||
mask3: dq 0x8080808080808080, 0x8080808080808080
|
||||
|
||||
%else ; Assembler doesn't understand these opcodes. Add empty symbol for windows.
|
||||
%ifidn __OUTPUT_FORMAT__, win64
|
||||
global no_ %+ FUNCTION_NAME
|
||||
no_ %+ FUNCTION_NAME %+ :
|
||||
%endif
|
||||
%endif ; (AS_FEATURE_LEVEL) >= 10
|
||||
@ -57,6 +57,7 @@ extern crc16_t10dif_copy_base
|
||||
%if (AS_FEATURE_LEVEL) >= 10
|
||||
extern crc32_gzip_refl_by16_10
|
||||
extern crc32_ieee_by16_10
|
||||
extern crc32_iscsi_by16_10
|
||||
extern crc16_t10dif_by16_10
|
||||
%endif
|
||||
|
||||
@ -93,18 +94,58 @@ crc32_iscsi_dispatch_init:
|
||||
push rcx
|
||||
push rdx
|
||||
push rsi
|
||||
push rdi
|
||||
lea rsi, [crc32_iscsi_base WRT_OPT] ; Default
|
||||
|
||||
mov eax, 1
|
||||
cpuid
|
||||
lea rbx, [crc32_iscsi_00 WRT_OPT]
|
||||
lea rax, [crc32_iscsi_01 WRT_OPT]
|
||||
mov ebx, ecx ; save cpuid1.ecx
|
||||
test ecx, FLAG_CPUID1_ECX_SSE4_2
|
||||
jz .crc_iscsi_init_done ; use iscsi_base
|
||||
lea rsi, [crc32_iscsi_00 WRT_OPT]
|
||||
test ecx, FLAG_CPUID1_ECX_CLMUL
|
||||
jz .crc_iscsi_init_done ; use ieee_base
|
||||
lea rsi, [crc32_iscsi_01 WRT_OPT]
|
||||
|
||||
test ecx, FLAG_CPUID1_ECX_SSE4_2
|
||||
cmovne rsi, rbx
|
||||
test ecx, FLAG_CPUID1_ECX_CLMUL
|
||||
cmovne rsi, rax
|
||||
;; Test for XMM_YMM support/AVX
|
||||
test ecx, FLAG_CPUID1_ECX_OSXSAVE
|
||||
je .crc_iscsi_init_done
|
||||
xor ecx, ecx
|
||||
xgetbv ; xcr -> edx:eax
|
||||
mov edi, eax ; save xgetvb.eax
|
||||
|
||||
and eax, FLAG_XGETBV_EAX_XMM_YMM
|
||||
cmp eax, FLAG_XGETBV_EAX_XMM_YMM
|
||||
jne .crc_iscsi_init_done
|
||||
test ebx, FLAG_CPUID1_ECX_AVX
|
||||
je .crc_iscsi_init_done
|
||||
;; AVX/02 opt if available
|
||||
|
||||
%if AS_FEATURE_LEVEL >= 10
|
||||
;; Test for AVX2
|
||||
xor ecx, ecx
|
||||
mov eax, 7
|
||||
cpuid
|
||||
test ebx, FLAG_CPUID7_EBX_AVX2
|
||||
je .crc_iscsi_init_done ; No AVX2 possible
|
||||
|
||||
;; Test for AVX512
|
||||
and edi, FLAG_XGETBV_EAX_ZMM_OPM
|
||||
cmp edi, FLAG_XGETBV_EAX_ZMM_OPM
|
||||
jne .crc_iscsi_init_done ; No AVX512 possible
|
||||
and ebx, FLAGS_CPUID7_EBX_AVX512_G1
|
||||
cmp ebx, FLAGS_CPUID7_EBX_AVX512_G1
|
||||
jne .crc_iscsi_init_done
|
||||
|
||||
and ecx, FLAGS_CPUID7_ECX_AVX512_G2
|
||||
cmp ecx, FLAGS_CPUID7_ECX_AVX512_G2
|
||||
lea rbx, [crc32_iscsi_by16_10 WRT_OPT] ; AVX512/10 opt
|
||||
cmove rsi, rbx
|
||||
%endif
|
||||
|
||||
.crc_iscsi_init_done:
|
||||
mov [crc32_iscsi_dispatched], rsi
|
||||
pop rdi
|
||||
pop rsi
|
||||
pop rdx
|
||||
pop rcx
|
||||
|
||||
Loading…
Reference in New Issue
Block a user