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/**********************************************************************
Copyright(c) 2020 Arm Corporation All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name of Arm Corporation nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**********************************************************************/
.macro crc32_hw_common poly_type
.ifc \poly_type,crc32
mvn wCRC,wCRC
.endif
cbz LEN, .zero_length_ret
tbz BUF, 0, .align_short
ldrb wdata,[BUF],1
sub LEN,LEN,1
crc32_u8 wCRC,wCRC,wdata
.align_short:
tst BUF,2
ccmp LEN,1,0,ne
bhi .align_short_2
tst BUF,4
ccmp LEN,3,0,ne
bhi .align_word
.align_finish:
cmp LEN, 63
bls .loop_16B
.loop_64B:
ldp data0, data1, [BUF],#16
prfm pldl2keep,[BUF,2048]
sub LEN,LEN,#64
ldp data2, data3, [BUF],#16
prfm pldl1keep,[BUF,256]
cmp LEN,#64
crc32_u64 wCRC, wCRC, data0
crc32_u64 wCRC, wCRC, data1
ldp data0, data1, [BUF],#16
crc32_u64 wCRC, wCRC, data2
crc32_u64 wCRC, wCRC, data3
ldp data2, data3, [BUF],#16
crc32_u64 wCRC, wCRC, data0
crc32_u64 wCRC, wCRC, data1
crc32_u64 wCRC, wCRC, data2
crc32_u64 wCRC, wCRC, data3
bge .loop_64B
.loop_16B:
cmp LEN, 15
bls .less_16B
ldp data0, data1, [BUF],#16
sub LEN,LEN,#16
cmp LEN,15
crc32_u64 wCRC, wCRC, data0
crc32_u64 wCRC, wCRC, data1
bls .less_16B
ldp data0, data1, [BUF],#16
sub LEN,LEN,#16
cmp LEN,15
crc32_u64 wCRC, wCRC, data0
crc32_u64 wCRC, wCRC, data1
bls .less_16B
ldp data0, data1, [BUF],#16
sub LEN,LEN,#16 //MUST less than 16B
crc32_u64 wCRC, wCRC, data0
crc32_u64 wCRC, wCRC, data1
.less_16B:
cmp LEN, 7
bls .less_8B
ldr data0, [BUF], 8
sub LEN, LEN, #8
crc32_u64 wCRC, wCRC, data0
.less_8B:
cmp LEN, 3
bls .less_4B
ldr wdata, [BUF], 4
sub LEN, LEN, #4
crc32_u32 wCRC, wCRC, wdata
.less_4B:
cmp LEN, 1
bls .less_2B
ldrh wdata, [BUF], 2
sub LEN, LEN, #2
crc32_u16 wCRC, wCRC, wdata
.less_2B:
cbz LEN, .zero_length_ret
ldrb wdata, [BUF]
crc32_u8 wCRC, wCRC, wdata
.zero_length_ret:
.ifc \poly_type,crc32
mvn w0, wCRC
.else
mov w0, wCRC
.endif
ret
.align_short_2:
ldrh wdata, [BUF], 2
sub LEN, LEN, 2
tst BUF, 4
crc32_u16 wCRC, wCRC, wdata
ccmp LEN, 3, 0, ne
bls .align_finish
.align_word:
ldr wdata, [BUF], 4
sub LEN, LEN, #4
crc32_u32 wCRC, wCRC, wdata
b .align_finish
.endm
.macro crc32_3crc_fold poly_type
.ifc \poly_type,crc32
mvn wCRC,wCRC
.endif
cbz LEN, .zero_length_ret
tbz BUF, 0, .align_short
ldrb wdata,[BUF],1
sub LEN,LEN,1
crc32_u8 wCRC,wCRC,wdata
.align_short:
tst BUF,2
ccmp LEN,1,0,ne
bhi .align_short_2
tst BUF,4
ccmp LEN,3,0,ne
bhi .align_word
.align_finish:
cmp LEN,1023
adr const_adr, .Lconstants
bls 1f
ldp dconst0,dconst1,[const_adr]
2:
ldr crc0_data0,[ptr_crc0],8
prfm pldl2keep,[ptr_crc0,3*1024-8]
mov crc1,0
mov crc2,0
add ptr_crc1,ptr_crc0,336
add ptr_crc2,ptr_crc0,336*2
crc32_u64 crc0,crc0,crc0_data0
.set offset,0
.set ptr_offset,8
.rept 5
ldp crc0_data0,crc0_data1,[ptr_crc0],16
ldp crc1_data0,crc1_data1,[ptr_crc1],16
.set offset,offset+64
.set ptr_offset,ptr_offset+16
prfm pldl2keep,[ptr_crc0,3*1024-ptr_offset+offset]
crc32_u64 crc0,crc0,crc0_data0
crc32_u64 crc0,crc0,crc0_data1
ldp crc2_data0,crc2_data1,[ptr_crc2],16
crc32_u64 crc1,crc1,crc1_data0
crc32_u64 crc1,crc1,crc1_data1
crc32_u64 crc2,crc2,crc2_data0
crc32_u64 crc2,crc2,crc2_data1
.endr
.set l1_offset,0
.rept 10
ldp crc0_data0,crc0_data1,[ptr_crc0],16
ldp crc1_data0,crc1_data1,[ptr_crc1],16
.set offset,offset+64
.set ptr_offset,ptr_offset+16
prfm pldl2keep,[ptr_crc0,3*1024-ptr_offset+offset]
prfm pldl1keep,[ptr_crc0,2*1024-ptr_offset+l1_offset]
.set l1_offset,l1_offset+64
crc32_u64 crc0,crc0,crc0_data0
crc32_u64 crc0,crc0,crc0_data1
ldp crc2_data0,crc2_data1,[ptr_crc2],16
crc32_u64 crc1,crc1,crc1_data0
crc32_u64 crc1,crc1,crc1_data1
crc32_u64 crc2,crc2,crc2_data0
crc32_u64 crc2,crc2,crc2_data1
.endr
.rept 6
ldp crc0_data0,crc0_data1,[ptr_crc0],16
ldp crc1_data0,crc1_data1,[ptr_crc1],16
.set ptr_offset,ptr_offset+16
prfm pldl1keep,[ptr_crc0,2*1024-ptr_offset+l1_offset]
.set l1_offset,l1_offset+64
crc32_u64 crc0,crc0,crc0_data0
crc32_u64 crc0,crc0,crc0_data1
ldp crc2_data0,crc2_data1,[ptr_crc2],16
crc32_u64 crc1,crc1,crc1_data0
crc32_u64 crc1,crc1,crc1_data1
crc32_u64 crc2,crc2,crc2_data0
crc32_u64 crc2,crc2,crc2_data1
.endr
ldr crc2_data0,[ptr_crc2]
fmov dtmp0,xcrc0
fmov dtmp1,xcrc1
crc32_u64 crc2,crc2,crc2_data0
add ptr_crc0,ptr_crc0,1024-(336+8)
pmull vtmp0.1q,vtmp0.1d,vconst0.1d
sub LEN,LEN,1024
pmull vtmp1.1q,vtmp1.1d,vconst1.1d
cmp LEN,1024
fmov xcrc0,dtmp0
fmov xcrc1,dtmp1
crc32_u64 crc0,wzr,xcrc0
crc32_u64 crc1,wzr,xcrc1
eor crc0,crc0,crc2
eor crc0,crc0,crc1
bhs 2b
1:
cmp LEN, 63
bls .loop_16B
.loop_64B:
ldp data0, data1, [BUF],#16
sub LEN,LEN,#64
ldp data2, data3, [BUF],#16
cmp LEN,#64
crc32_u64 wCRC, wCRC, data0
crc32_u64 wCRC, wCRC, data1
ldp data0, data1, [BUF],#16
crc32_u64 wCRC, wCRC, data2
crc32_u64 wCRC, wCRC, data3
ldp data2, data3, [BUF],#16
crc32_u64 wCRC, wCRC, data0
crc32_u64 wCRC, wCRC, data1
crc32_u64 wCRC, wCRC, data2
crc32_u64 wCRC, wCRC, data3
bge .loop_64B
.loop_16B:
cmp LEN, 15
bls .less_16B
ldp data0, data1, [BUF],#16
sub LEN,LEN,#16
cmp LEN,15
crc32_u64 wCRC, wCRC, data0
crc32_u64 wCRC, wCRC, data1
bls .less_16B
ldp data0, data1, [BUF],#16
sub LEN,LEN,#16
cmp LEN,15
crc32_u64 wCRC, wCRC, data0
crc32_u64 wCRC, wCRC, data1
bls .less_16B
ldp data0, data1, [BUF],#16
sub LEN,LEN,#16 //MUST less than 16B
crc32_u64 wCRC, wCRC, data0
crc32_u64 wCRC, wCRC, data1
.less_16B:
cmp LEN, 7
bls .less_8B
ldr data0, [BUF], 8
sub LEN, LEN, #8
crc32_u64 wCRC, wCRC, data0
.less_8B:
cmp LEN, 3
bls .less_4B
ldr wdata, [BUF], 4
sub LEN, LEN, #4
crc32_u32 wCRC, wCRC, wdata
.less_4B:
cmp LEN, 1
bls .less_2B
ldrh wdata, [BUF], 2
sub LEN, LEN, #2
crc32_u16 wCRC, wCRC, wdata
.less_2B:
cbz LEN, .zero_length_ret
ldrb wdata, [BUF]
crc32_u8 wCRC, wCRC, wdata
.zero_length_ret:
.ifc \poly_type,crc32
mvn w0, wCRC
.else
mov w0, wCRC
.endif
ret
.align_short_2:
ldrh wdata, [BUF], 2
sub LEN, LEN, 2
tst BUF, 4
crc32_u16 wCRC, wCRC, wdata
ccmp LEN, 3, 0, ne
bls .align_finish
.align_word:
ldr wdata, [BUF], 4
sub LEN, LEN, #4
crc32_u32 wCRC, wCRC, wdata
b .align_finish
.Lconstants:
.ifc \poly_type,crc32
.quad 0xb486819b
.quad 0x76278617
.else
.quad 0xe417f38a
.quad 0x8f158014
.endif
.endm
|
