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isa-l/crc/crc64_jones_norm_by8.asm
H.J. Lu cd888f01a4 x86: Add ENDBR32/ENDBR64 at function entries for Intel CET 
To support Intel CET, all indirect branch targets must start with
ENDBR32/ENDBR64.  Here is a patch to define endbranch and add it to
function entries in x86 assembly codes which are indirect branch
targets as discovered by running testsuite on Intel CET machine and
visual inspection.

Verified with

$ CC="gcc -Wl,-z,cet-report=error -fcf-protection" CXX="g++ -Wl,-z,cet-report=error -fcf-protection" .../configure x86_64-linux
$ make -j8
$ make -j8 check

with both nasm and yasm on both CET and non-CET machines.

Change-Id: I9822578e7294fb5043a64ab7de5c41de81a7d337
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
2020-05-26 09:16:49 -07:00

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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Copyright(c) 2011-2016 Intel 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 Intel 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.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Function API:
; uint64_t crc64_jones_norm_by8(
; uint64_t init_crc, //initial CRC value, 64 bits
; const unsigned char *buf, //buffer pointer to calculate CRC on
; uint64_t len //buffer length in bytes (64-bit data)
; );
;
%include "reg_sizes.asm"
%define fetch_dist 1024
[bits 64]
default rel
section .text
%ifidn __OUTPUT_FORMAT__, win64
%xdefine arg1 rcx
%xdefine arg2 rdx
%xdefine arg3 r8
%else
%xdefine arg1 rdi
%xdefine arg2 rsi
%xdefine arg3 rdx
%endif
%define TMP 16*0
%ifidn __OUTPUT_FORMAT__, win64
%define XMM_SAVE 16*2
%define VARIABLE_OFFSET 16*10+8
%else
%define VARIABLE_OFFSET 16*2+8
%endif
align 16
mk_global crc64_jones_norm_by8, function
crc64_jones_norm_by8:
endbranch
not arg1 ;~init_crc
sub rsp,VARIABLE_OFFSET
%ifidn __OUTPUT_FORMAT__, win64
; push the xmm registers into the stack to maintain
movdqa [rsp + XMM_SAVE + 16*0], xmm6
movdqa [rsp + XMM_SAVE + 16*1], xmm7
movdqa [rsp + XMM_SAVE + 16*2], xmm8
movdqa [rsp + XMM_SAVE + 16*3], xmm9
movdqa [rsp + XMM_SAVE + 16*4], xmm10
movdqa [rsp + XMM_SAVE + 16*5], xmm11
movdqa [rsp + XMM_SAVE + 16*6], xmm12
movdqa [rsp + XMM_SAVE + 16*7], xmm13
%endif
; check if smaller than 256
cmp arg3, 256
; for sizes less than 256, we can't fold 128B at a time...
jl _less_than_256
; load the initial crc value
movq xmm10, arg1 ; initial crc
; crc value does not need to be byte-reflected, but it needs to be moved to the high part of the register.
; because data will be byte-reflected and will align with initial crc at correct place.
pslldq xmm10, 8
movdqa xmm11, [SHUF_MASK]
; receive the initial 128B data, xor the initial crc value
movdqu xmm0, [arg2+16*0]
movdqu xmm1, [arg2+16*1]
movdqu xmm2, [arg2+16*2]
movdqu xmm3, [arg2+16*3]
movdqu xmm4, [arg2+16*4]
movdqu xmm5, [arg2+16*5]
movdqu xmm6, [arg2+16*6]
movdqu xmm7, [arg2+16*7]
pshufb xmm0, xmm11
; XOR the initial_crc value
pxor xmm0, xmm10
pshufb xmm1, xmm11
pshufb xmm2, xmm11
pshufb xmm3, xmm11
pshufb xmm4, xmm11
pshufb xmm5, xmm11
pshufb xmm6, xmm11
pshufb xmm7, xmm11
movdqa xmm10, [rk3] ;xmm10 has rk3 and rk4
;imm value of pclmulqdq instruction will determine which constant to use
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; we subtract 256 instead of 128 to save one instruction from the loop
sub arg3, 256
; at this section of the code, there is 128*x+y (0<=y<128) bytes of buffer. The _fold_128_B_loop
; loop will fold 128B at a time until we have 128+y Bytes of buffer
; fold 128B at a time. This section of the code folds 8 xmm registers in parallel
_fold_128_B_loop:
; update the buffer pointer
add arg2, 128 ; buf += 128;
prefetchnta [arg2+fetch_dist+0]
movdqu xmm9, [arg2+16*0]
movdqu xmm12, [arg2+16*1]
pshufb xmm9, xmm11
pshufb xmm12, xmm11
movdqa xmm8, xmm0
movdqa xmm13, xmm1
pclmulqdq xmm0, xmm10, 0x0
pclmulqdq xmm8, xmm10 , 0x11
pclmulqdq xmm1, xmm10, 0x0
pclmulqdq xmm13, xmm10 , 0x11
pxor xmm0, xmm9
xorps xmm0, xmm8
pxor xmm1, xmm12
xorps xmm1, xmm13
prefetchnta [arg2+fetch_dist+32]
movdqu xmm9, [arg2+16*2]
movdqu xmm12, [arg2+16*3]
pshufb xmm9, xmm11
pshufb xmm12, xmm11
movdqa xmm8, xmm2
movdqa xmm13, xmm3
pclmulqdq xmm2, xmm10, 0x0
pclmulqdq xmm8, xmm10 , 0x11
pclmulqdq xmm3, xmm10, 0x0
pclmulqdq xmm13, xmm10 , 0x11
pxor xmm2, xmm9
xorps xmm2, xmm8
pxor xmm3, xmm12
xorps xmm3, xmm13
prefetchnta [arg2+fetch_dist+64]
movdqu xmm9, [arg2+16*4]
movdqu xmm12, [arg2+16*5]
pshufb xmm9, xmm11
pshufb xmm12, xmm11
movdqa xmm8, xmm4
movdqa xmm13, xmm5
pclmulqdq xmm4, xmm10, 0x0
pclmulqdq xmm8, xmm10 , 0x11
pclmulqdq xmm5, xmm10, 0x0
pclmulqdq xmm13, xmm10 , 0x11
pxor xmm4, xmm9
xorps xmm4, xmm8
pxor xmm5, xmm12
xorps xmm5, xmm13
prefetchnta [arg2+fetch_dist+96]
movdqu xmm9, [arg2+16*6]
movdqu xmm12, [arg2+16*7]
pshufb xmm9, xmm11
pshufb xmm12, xmm11
movdqa xmm8, xmm6
movdqa xmm13, xmm7
pclmulqdq xmm6, xmm10, 0x0
pclmulqdq xmm8, xmm10 , 0x11
pclmulqdq xmm7, xmm10, 0x0
pclmulqdq xmm13, xmm10 , 0x11
pxor xmm6, xmm9
xorps xmm6, xmm8
pxor xmm7, xmm12
xorps xmm7, xmm13
sub arg3, 128
; check if there is another 128B in the buffer to be able to fold
jge _fold_128_B_loop
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
add arg2, 128
; at this point, the buffer pointer is pointing at the last y Bytes of the buffer, where 0 <= y < 128
; the 128B of folded data is in 8 of the xmm registers: xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7
; fold the 8 xmm registers to 1 xmm register with different constants
movdqa xmm10, [rk9]
movdqa xmm8, xmm0
pclmulqdq xmm0, xmm10, 0x11
pclmulqdq xmm8, xmm10, 0x0
pxor xmm7, xmm8
xorps xmm7, xmm0
movdqa xmm10, [rk11]
movdqa xmm8, xmm1
pclmulqdq xmm1, xmm10, 0x11
pclmulqdq xmm8, xmm10, 0x0
pxor xmm7, xmm8
xorps xmm7, xmm1
movdqa xmm10, [rk13]
movdqa xmm8, xmm2
pclmulqdq xmm2, xmm10, 0x11
pclmulqdq xmm8, xmm10, 0x0
pxor xmm7, xmm8
pxor xmm7, xmm2
movdqa xmm10, [rk15]
movdqa xmm8, xmm3
pclmulqdq xmm3, xmm10, 0x11
pclmulqdq xmm8, xmm10, 0x0
pxor xmm7, xmm8
xorps xmm7, xmm3
movdqa xmm10, [rk17]
movdqa xmm8, xmm4
pclmulqdq xmm4, xmm10, 0x11
pclmulqdq xmm8, xmm10, 0x0
pxor xmm7, xmm8
pxor xmm7, xmm4
movdqa xmm10, [rk19]
movdqa xmm8, xmm5
pclmulqdq xmm5, xmm10, 0x11
pclmulqdq xmm8, xmm10, 0x0
pxor xmm7, xmm8
xorps xmm7, xmm5
movdqa xmm10, [rk1] ;xmm10 has rk1 and rk2
movdqa xmm8, xmm6
pclmulqdq xmm6, xmm10, 0x11
pclmulqdq xmm8, xmm10, 0x0
pxor xmm7, xmm8
pxor xmm7, xmm6
; instead of 128, we add 112 to the loop counter to save 1 instruction from the loop
; instead of a cmp instruction, we use the negative flag with the jl instruction
add arg3, 128-16
jl _final_reduction_for_128
; now we have 16+y bytes left to reduce. 16 Bytes is in register xmm7 and the rest is in memory
; we can fold 16 bytes at a time if y>=16
; continue folding 16B at a time
_16B_reduction_loop:
movdqa xmm8, xmm7
pclmulqdq xmm7, xmm10, 0x11
pclmulqdq xmm8, xmm10, 0x0
pxor xmm7, xmm8
movdqu xmm0, [arg2]
pshufb xmm0, xmm11
pxor xmm7, xmm0
add arg2, 16
sub arg3, 16
; instead of a cmp instruction, we utilize the flags with the jge instruction
; equivalent of: cmp arg3, 16-16
; check if there is any more 16B in the buffer to be able to fold
jge _16B_reduction_loop
;now we have 16+z bytes left to reduce, where 0<= z < 16.
;first, we reduce the data in the xmm7 register
_final_reduction_for_128:
; check if any more data to fold. If not, compute the CRC of the final 128 bits
add arg3, 16
je _128_done
; here we are getting data that is less than 16 bytes.
; since we know that there was data before the pointer, we can offset the input pointer before the actual point, to receive exactly 16 bytes.
; after that the registers need to be adjusted.
_get_last_two_xmms:
movdqa xmm2, xmm7
movdqu xmm1, [arg2 - 16 + arg3]
pshufb xmm1, xmm11
; get rid of the extra data that was loaded before
; load the shift constant
lea rax, [pshufb_shf_table + 16]
sub rax, arg3
movdqu xmm0, [rax]
; shift xmm2 to the left by arg3 bytes
pshufb xmm2, xmm0
; shift xmm7 to the right by 16-arg3 bytes
pxor xmm0, [mask1]
pshufb xmm7, xmm0
pblendvb xmm1, xmm2 ;xmm0 is implicit
; fold 16 Bytes
movdqa xmm2, xmm1
movdqa xmm8, xmm7
pclmulqdq xmm7, xmm10, 0x11
pclmulqdq xmm8, xmm10, 0x0
pxor xmm7, xmm8
pxor xmm7, xmm2
_128_done:
; compute crc of a 128-bit value
movdqa xmm10, [rk5] ; rk5 and rk6 in xmm10
movdqa xmm0, xmm7
;64b fold
pclmulqdq xmm7, xmm10, 0x01 ; H*L
pslldq xmm0, 8
pxor xmm7, xmm0
;barrett reduction
_barrett:
movdqa xmm10, [rk7] ; rk7 and rk8 in xmm10
movdqa xmm0, xmm7
movdqa xmm1, xmm7
pand xmm1, [mask3]
pclmulqdq xmm7, xmm10, 0x01
pxor xmm7, xmm1
pclmulqdq xmm7, xmm10, 0x11
pxor xmm7, xmm0
pextrq rax, xmm7, 0
_cleanup:
not rax
%ifidn __OUTPUT_FORMAT__, win64
movdqa xmm6, [rsp + XMM_SAVE + 16*0]
movdqa xmm7, [rsp + XMM_SAVE + 16*1]
movdqa xmm8, [rsp + XMM_SAVE + 16*2]
movdqa xmm9, [rsp + XMM_SAVE + 16*3]
movdqa xmm10, [rsp + XMM_SAVE + 16*4]
movdqa xmm11, [rsp + XMM_SAVE + 16*5]
movdqa xmm12, [rsp + XMM_SAVE + 16*6]
movdqa xmm13, [rsp + XMM_SAVE + 16*7]
%endif
add rsp, VARIABLE_OFFSET
ret
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
align 16
_less_than_256:
; check if there is enough buffer to be able to fold 16B at a time
cmp arg3, 32
jl _less_than_32
movdqa xmm11, [SHUF_MASK]
; if there is, load the constants
movdqa xmm10, [rk1] ; rk1 and rk2 in xmm10
movq xmm0, arg1 ; get the initial crc value
pslldq xmm0, 8 ; align it to its correct place
movdqu xmm7, [arg2] ; load the plaintext
pshufb xmm7, xmm11 ; byte-reflect the plaintext
pxor xmm7, xmm0
; update the buffer pointer
add arg2, 16
; update the counter. subtract 32 instead of 16 to save one instruction from the loop
sub arg3, 32
jmp _16B_reduction_loop
align 16
_less_than_32:
; mov initial crc to the return value. this is necessary for zero-length buffers.
mov rax, arg1
test arg3, arg3
je _cleanup
movdqa xmm11, [SHUF_MASK]
movq xmm0, arg1 ; get the initial crc value
pslldq xmm0, 8 ; align it to its correct place
cmp arg3, 16
je _exact_16_left
jl _less_than_16_left
movdqu xmm7, [arg2] ; load the plaintext
pshufb xmm7, xmm11 ; byte-reflect the plaintext
pxor xmm7, xmm0 ; xor the initial crc value
add arg2, 16
sub arg3, 16
movdqa xmm10, [rk1] ; rk1 and rk2 in xmm10
jmp _get_last_two_xmms
align 16
_less_than_16_left:
; use stack space to load data less than 16 bytes, zero-out the 16B in memory first.
pxor xmm1, xmm1
mov r11, rsp
movdqa [r11], xmm1
; backup the counter value
mov r9, arg3
cmp arg3, 8
jl _less_than_8_left
; load 8 Bytes
mov rax, [arg2]
mov [r11], rax
add r11, 8
sub arg3, 8
add arg2, 8
_less_than_8_left:
cmp arg3, 4
jl _less_than_4_left
; load 4 Bytes
mov eax, [arg2]
mov [r11], eax
add r11, 4
sub arg3, 4
add arg2, 4
_less_than_4_left:
cmp arg3, 2
jl _less_than_2_left
; load 2 Bytes
mov ax, [arg2]
mov [r11], ax
add r11, 2
sub arg3, 2
add arg2, 2
_less_than_2_left:
cmp arg3, 1
jl _zero_left
; load 1 Byte
mov al, [arg2]
mov [r11], al
_zero_left:
movdqa xmm7, [rsp]
pshufb xmm7, xmm11
pxor xmm7, xmm0 ; xor the initial crc value
; shl r9, 4
lea rax, [pshufb_shf_table + 16]
sub rax, r9
cmp r9, 8
jl _end_1to7
_end_8to15:
movdqu xmm0, [rax]
pxor xmm0, [mask1]
pshufb xmm7, xmm0
jmp _128_done
_end_1to7:
; Right shift (8-length) bytes in XMM
add rax, 8
movdqu xmm0, [rax]
pshufb xmm7,xmm0
jmp _barrett
align 16
_exact_16_left:
movdqu xmm7, [arg2]
pshufb xmm7, xmm11
pxor xmm7, xmm0 ; xor the initial crc value
jmp _128_done
section .data
; precomputed constants
align 16
rk1:
DQ 0x4445ed2750017038
rk2:
DQ 0x698b74157cfbd736
rk3:
DQ 0x0cfcfb5101c4b775
rk4:
DQ 0x65403fd47cbec866
rk5:
DQ 0x4445ed2750017038
rk6:
DQ 0x0000000000000000
rk7:
DQ 0xddf3eeb298be6cf8
rk8:
DQ 0xad93d23594c935a9
rk9:
DQ 0xd8dc208e2ba527b4
rk10:
DQ 0xf032cfec76bb2bc5
rk11:
DQ 0xb536044f357f4238
rk12:
DQ 0xfdbf104d938ba67a
rk13:
DQ 0xeeddad9297a843e7
rk14:
DQ 0x3550bce629466473
rk15:
DQ 0x4e501e58ca43d25e
rk16:
DQ 0x13c961588f27f643
rk17:
DQ 0x3b60d00dcb1099bc
rk18:
DQ 0x44bf1f468c53b9a3
rk19:
DQ 0x96f2236e317179ee
rk20:
DQ 0xf00839aa0dd64bac
mask1:
dq 0x8080808080808080, 0x8080808080808080
mask2:
dq 0xFFFFFFFFFFFFFFFF, 0x00000000FFFFFFFF
mask3:
dq 0x0000000000000000, 0xFFFFFFFFFFFFFFFF
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, 0x0f0e0d0c0b0a0908
dq 0x8080808080808080, 0x0f0e0d0c0b0a0908
dq 0x8080808080808080, 0x8080808080808080
;;; func core, ver, snum
slversion crc64_jones_norm_by8, 01, 00, 0026
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