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e183914af0
A lot of asm-optimized routines in arch/x86/crypto/ keep its
constants in .data. This is wrong, they should be on .rodata.
Mnay of these constants are the same in different modules.
For example, 128-bit shuffle mask 0x000102030405060708090A0B0C0D0E0F
exists in at least half a dozen places.
There is a way to let linker merge them and use just one copy.
The rules are as follows: mergeable objects of different sizes
should not share sections. You can't put them all in one .rodata
section, they will lose "mergeability".
GCC puts its mergeable constants in ".rodata.cstSIZE" sections,
or ".rodata.cstSIZE.<object_name>" if -fdata-sections is used.
This patch does the same:
.section .rodata.cst16.SHUF_MASK, "aM", @progbits, 16
It is important that all data in such section consists of
16-byte elements, not larger ones, and there are no implicit
use of one element from another.
When this is not the case, use non-mergeable section:
.section .rodata[.VAR_NAME], "a", @progbits
This reduces .data by ~15 kbytes:
text data bss dec hex filename
11097415 2705840 2630712 16433967 fac32f vmlinux-prev.o
11112095 2690672 2630712 16433479 fac147 vmlinux.o
Merged objects are visible in System.map:
ffffffff81a28810 r POLY
ffffffff81a28810 r POLY
ffffffff81a28820 r TWOONE
ffffffff81a28820 r TWOONE
ffffffff81a28830 r PSHUFFLE_BYTE_FLIP_MASK <- merged regardless of
ffffffff81a28830 r SHUF_MASK <------------- the name difference
ffffffff81a28830 r SHUF_MASK
ffffffff81a28830 r SHUF_MASK
..
ffffffff81a28d00 r K512 <- merged three identical 640-byte tables
ffffffff81a28d00 r K512
ffffffff81a28d00 r K512
Use of object names in section name suffixes is not strictly necessary,
but might help if someday link stage will use garbage collection
to eliminate unused sections (ld --gc-sections).
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
CC: Herbert Xu <herbert@gondor.apana.org.au>
CC: Josh Poimboeuf <jpoimboe@redhat.com>
CC: Xiaodong Liu <xiaodong.liu@intel.com>
CC: Megha Dey <megha.dey@intel.com>
CC: linux-crypto@vger.kernel.org
CC: x86@kernel.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
425 lines
13 KiB
ArmAsm
425 lines
13 KiB
ArmAsm
########################################################################
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# Implement fast SHA-512 with SSSE3 instructions. (x86_64)
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#
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# Copyright (C) 2013 Intel Corporation.
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#
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# Authors:
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# James Guilford <james.guilford@intel.com>
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# Kirk Yap <kirk.s.yap@intel.com>
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# David Cote <david.m.cote@intel.com>
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# Tim Chen <tim.c.chen@linux.intel.com>
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#
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# This software is available to you under a choice of one of two
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# licenses. You may choose to be licensed under the terms of the GNU
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# General Public License (GPL) Version 2, available from the file
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# COPYING in the main directory of this source tree, or the
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# OpenIB.org BSD license below:
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# - Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# - Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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#
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########################################################################
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#
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# This code is described in an Intel White-Paper:
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# "Fast SHA-512 Implementations on Intel Architecture Processors"
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#
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# To find it, surf to http://www.intel.com/p/en_US/embedded
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# and search for that title.
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#
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########################################################################
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#include <linux/linkage.h>
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.text
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# Virtual Registers
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# ARG1
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digest = %rdi
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# ARG2
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msg = %rsi
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# ARG3
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msglen = %rdx
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T1 = %rcx
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T2 = %r8
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a_64 = %r9
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b_64 = %r10
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c_64 = %r11
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d_64 = %r12
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e_64 = %r13
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f_64 = %r14
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g_64 = %r15
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h_64 = %rbx
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tmp0 = %rax
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# Local variables (stack frame)
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W_SIZE = 80*8
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WK_SIZE = 2*8
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RSPSAVE_SIZE = 1*8
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GPRSAVE_SIZE = 5*8
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frame_W = 0
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frame_WK = frame_W + W_SIZE
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frame_RSPSAVE = frame_WK + WK_SIZE
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frame_GPRSAVE = frame_RSPSAVE + RSPSAVE_SIZE
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frame_size = frame_GPRSAVE + GPRSAVE_SIZE
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# Useful QWORD "arrays" for simpler memory references
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# MSG, DIGEST, K_t, W_t are arrays
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# WK_2(t) points to 1 of 2 qwords at frame.WK depdending on t being odd/even
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# Input message (arg1)
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#define MSG(i) 8*i(msg)
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# Output Digest (arg2)
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#define DIGEST(i) 8*i(digest)
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# SHA Constants (static mem)
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#define K_t(i) 8*i+K512(%rip)
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# Message Schedule (stack frame)
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#define W_t(i) 8*i+frame_W(%rsp)
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# W[t]+K[t] (stack frame)
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#define WK_2(i) 8*((i%2))+frame_WK(%rsp)
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.macro RotateState
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# Rotate symbols a..h right
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TMP = h_64
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h_64 = g_64
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g_64 = f_64
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f_64 = e_64
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e_64 = d_64
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d_64 = c_64
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c_64 = b_64
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b_64 = a_64
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a_64 = TMP
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.endm
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.macro SHA512_Round rnd
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# Compute Round %%t
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mov f_64, T1 # T1 = f
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mov e_64, tmp0 # tmp = e
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xor g_64, T1 # T1 = f ^ g
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ror $23, tmp0 # 41 # tmp = e ror 23
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and e_64, T1 # T1 = (f ^ g) & e
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xor e_64, tmp0 # tmp = (e ror 23) ^ e
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xor g_64, T1 # T1 = ((f ^ g) & e) ^ g = CH(e,f,g)
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idx = \rnd
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add WK_2(idx), T1 # W[t] + K[t] from message scheduler
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ror $4, tmp0 # 18 # tmp = ((e ror 23) ^ e) ror 4
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xor e_64, tmp0 # tmp = (((e ror 23) ^ e) ror 4) ^ e
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mov a_64, T2 # T2 = a
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add h_64, T1 # T1 = CH(e,f,g) + W[t] + K[t] + h
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ror $14, tmp0 # 14 # tmp = ((((e ror23)^e)ror4)^e)ror14 = S1(e)
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add tmp0, T1 # T1 = CH(e,f,g) + W[t] + K[t] + S1(e)
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mov a_64, tmp0 # tmp = a
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xor c_64, T2 # T2 = a ^ c
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and c_64, tmp0 # tmp = a & c
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and b_64, T2 # T2 = (a ^ c) & b
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xor tmp0, T2 # T2 = ((a ^ c) & b) ^ (a & c) = Maj(a,b,c)
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mov a_64, tmp0 # tmp = a
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ror $5, tmp0 # 39 # tmp = a ror 5
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xor a_64, tmp0 # tmp = (a ror 5) ^ a
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add T1, d_64 # e(next_state) = d + T1
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ror $6, tmp0 # 34 # tmp = ((a ror 5) ^ a) ror 6
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xor a_64, tmp0 # tmp = (((a ror 5) ^ a) ror 6) ^ a
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lea (T1, T2), h_64 # a(next_state) = T1 + Maj(a,b,c)
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ror $28, tmp0 # 28 # tmp = ((((a ror5)^a)ror6)^a)ror28 = S0(a)
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add tmp0, h_64 # a(next_state) = T1 + Maj(a,b,c) S0(a)
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RotateState
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.endm
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.macro SHA512_2Sched_2Round_sse rnd
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# Compute rounds t-2 and t-1
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# Compute message schedule QWORDS t and t+1
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# Two rounds are computed based on the values for K[t-2]+W[t-2] and
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# K[t-1]+W[t-1] which were previously stored at WK_2 by the message
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# scheduler.
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# The two new schedule QWORDS are stored at [W_t(%%t)] and [W_t(%%t+1)].
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# They are then added to their respective SHA512 constants at
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# [K_t(%%t)] and [K_t(%%t+1)] and stored at dqword [WK_2(%%t)]
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# For brievity, the comments following vectored instructions only refer to
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# the first of a pair of QWORDS.
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# Eg. XMM2=W[t-2] really means XMM2={W[t-2]|W[t-1]}
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# The computation of the message schedule and the rounds are tightly
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# stitched to take advantage of instruction-level parallelism.
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# For clarity, integer instructions (for the rounds calculation) are indented
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# by one tab. Vectored instructions (for the message scheduler) are indented
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# by two tabs.
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mov f_64, T1
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idx = \rnd -2
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movdqa W_t(idx), %xmm2 # XMM2 = W[t-2]
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xor g_64, T1
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and e_64, T1
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movdqa %xmm2, %xmm0 # XMM0 = W[t-2]
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xor g_64, T1
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idx = \rnd
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add WK_2(idx), T1
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idx = \rnd - 15
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movdqu W_t(idx), %xmm5 # XMM5 = W[t-15]
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mov e_64, tmp0
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ror $23, tmp0 # 41
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movdqa %xmm5, %xmm3 # XMM3 = W[t-15]
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xor e_64, tmp0
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ror $4, tmp0 # 18
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psrlq $61-19, %xmm0 # XMM0 = W[t-2] >> 42
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xor e_64, tmp0
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ror $14, tmp0 # 14
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psrlq $(8-7), %xmm3 # XMM3 = W[t-15] >> 1
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add tmp0, T1
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add h_64, T1
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pxor %xmm2, %xmm0 # XMM0 = (W[t-2] >> 42) ^ W[t-2]
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mov a_64, T2
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xor c_64, T2
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pxor %xmm5, %xmm3 # XMM3 = (W[t-15] >> 1) ^ W[t-15]
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and b_64, T2
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mov a_64, tmp0
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psrlq $(19-6), %xmm0 # XMM0 = ((W[t-2]>>42)^W[t-2])>>13
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and c_64, tmp0
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xor tmp0, T2
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psrlq $(7-1), %xmm3 # XMM3 = ((W[t-15]>>1)^W[t-15])>>6
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mov a_64, tmp0
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ror $5, tmp0 # 39
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pxor %xmm2, %xmm0 # XMM0 = (((W[t-2]>>42)^W[t-2])>>13)^W[t-2]
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xor a_64, tmp0
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ror $6, tmp0 # 34
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pxor %xmm5, %xmm3 # XMM3 = (((W[t-15]>>1)^W[t-15])>>6)^W[t-15]
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xor a_64, tmp0
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ror $28, tmp0 # 28
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psrlq $6, %xmm0 # XMM0 = ((((W[t-2]>>42)^W[t-2])>>13)^W[t-2])>>6
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add tmp0, T2
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add T1, d_64
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psrlq $1, %xmm3 # XMM3 = (((W[t-15]>>1)^W[t-15])>>6)^W[t-15]>>1
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lea (T1, T2), h_64
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RotateState
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movdqa %xmm2, %xmm1 # XMM1 = W[t-2]
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mov f_64, T1
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xor g_64, T1
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movdqa %xmm5, %xmm4 # XMM4 = W[t-15]
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and e_64, T1
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xor g_64, T1
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psllq $(64-19)-(64-61) , %xmm1 # XMM1 = W[t-2] << 42
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idx = \rnd + 1
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add WK_2(idx), T1
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mov e_64, tmp0
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psllq $(64-1)-(64-8), %xmm4 # XMM4 = W[t-15] << 7
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ror $23, tmp0 # 41
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xor e_64, tmp0
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pxor %xmm2, %xmm1 # XMM1 = (W[t-2] << 42)^W[t-2]
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ror $4, tmp0 # 18
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xor e_64, tmp0
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pxor %xmm5, %xmm4 # XMM4 = (W[t-15]<<7)^W[t-15]
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ror $14, tmp0 # 14
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add tmp0, T1
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psllq $(64-61), %xmm1 # XMM1 = ((W[t-2] << 42)^W[t-2])<<3
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add h_64, T1
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mov a_64, T2
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psllq $(64-8), %xmm4 # XMM4 = ((W[t-15]<<7)^W[t-15])<<56
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xor c_64, T2
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and b_64, T2
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pxor %xmm1, %xmm0 # XMM0 = s1(W[t-2])
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mov a_64, tmp0
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and c_64, tmp0
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idx = \rnd - 7
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movdqu W_t(idx), %xmm1 # XMM1 = W[t-7]
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xor tmp0, T2
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pxor %xmm4, %xmm3 # XMM3 = s0(W[t-15])
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mov a_64, tmp0
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paddq %xmm3, %xmm0 # XMM0 = s1(W[t-2]) + s0(W[t-15])
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ror $5, tmp0 # 39
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idx =\rnd-16
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paddq W_t(idx), %xmm0 # XMM0 = s1(W[t-2]) + s0(W[t-15]) + W[t-16]
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xor a_64, tmp0
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paddq %xmm1, %xmm0 # XMM0 = s1(W[t-2]) + W[t-7] + s0(W[t-15]) + W[t-16]
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ror $6, tmp0 # 34
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movdqa %xmm0, W_t(\rnd) # Store scheduled qwords
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xor a_64, tmp0
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paddq K_t(\rnd), %xmm0 # Compute W[t]+K[t]
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ror $28, tmp0 # 28
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idx = \rnd
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movdqa %xmm0, WK_2(idx) # Store W[t]+K[t] for next rounds
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add tmp0, T2
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add T1, d_64
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lea (T1, T2), h_64
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RotateState
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.endm
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########################################################################
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# void sha512_transform_ssse3(void* D, const void* M, u64 L)#
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# Purpose: Updates the SHA512 digest stored at D with the message stored in M.
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# The size of the message pointed to by M must be an integer multiple of SHA512
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# message blocks.
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# L is the message length in SHA512 blocks.
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########################################################################
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ENTRY(sha512_transform_ssse3)
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cmp $0, msglen
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je nowork
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# Allocate Stack Space
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mov %rsp, %rax
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sub $frame_size, %rsp
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and $~(0x20 - 1), %rsp
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mov %rax, frame_RSPSAVE(%rsp)
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# Save GPRs
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mov %rbx, frame_GPRSAVE(%rsp)
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mov %r12, frame_GPRSAVE +8*1(%rsp)
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mov %r13, frame_GPRSAVE +8*2(%rsp)
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mov %r14, frame_GPRSAVE +8*3(%rsp)
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mov %r15, frame_GPRSAVE +8*4(%rsp)
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updateblock:
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# Load state variables
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mov DIGEST(0), a_64
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mov DIGEST(1), b_64
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mov DIGEST(2), c_64
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mov DIGEST(3), d_64
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mov DIGEST(4), e_64
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mov DIGEST(5), f_64
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mov DIGEST(6), g_64
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mov DIGEST(7), h_64
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t = 0
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.rept 80/2 + 1
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# (80 rounds) / (2 rounds/iteration) + (1 iteration)
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# +1 iteration because the scheduler leads hashing by 1 iteration
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.if t < 2
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# BSWAP 2 QWORDS
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movdqa XMM_QWORD_BSWAP(%rip), %xmm1
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movdqu MSG(t), %xmm0
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pshufb %xmm1, %xmm0 # BSWAP
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movdqa %xmm0, W_t(t) # Store Scheduled Pair
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paddq K_t(t), %xmm0 # Compute W[t]+K[t]
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movdqa %xmm0, WK_2(t) # Store into WK for rounds
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.elseif t < 16
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# BSWAP 2 QWORDS# Compute 2 Rounds
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movdqu MSG(t), %xmm0
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pshufb %xmm1, %xmm0 # BSWAP
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SHA512_Round t-2 # Round t-2
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movdqa %xmm0, W_t(t) # Store Scheduled Pair
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paddq K_t(t), %xmm0 # Compute W[t]+K[t]
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SHA512_Round t-1 # Round t-1
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movdqa %xmm0, WK_2(t) # Store W[t]+K[t] into WK
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.elseif t < 79
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# Schedule 2 QWORDS# Compute 2 Rounds
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SHA512_2Sched_2Round_sse t
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.else
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# Compute 2 Rounds
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SHA512_Round t-2
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SHA512_Round t-1
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.endif
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t = t+2
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.endr
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# Update digest
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add a_64, DIGEST(0)
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add b_64, DIGEST(1)
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add c_64, DIGEST(2)
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add d_64, DIGEST(3)
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add e_64, DIGEST(4)
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add f_64, DIGEST(5)
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add g_64, DIGEST(6)
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add h_64, DIGEST(7)
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# Advance to next message block
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add $16*8, msg
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dec msglen
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jnz updateblock
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# Restore GPRs
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mov frame_GPRSAVE(%rsp), %rbx
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mov frame_GPRSAVE +8*1(%rsp), %r12
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mov frame_GPRSAVE +8*2(%rsp), %r13
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mov frame_GPRSAVE +8*3(%rsp), %r14
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mov frame_GPRSAVE +8*4(%rsp), %r15
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# Restore Stack Pointer
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mov frame_RSPSAVE(%rsp), %rsp
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nowork:
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ret
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ENDPROC(sha512_transform_ssse3)
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########################################################################
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### Binary Data
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.section .rodata.cst16.XMM_QWORD_BSWAP, "aM", @progbits, 16
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.align 16
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# Mask for byte-swapping a couple of qwords in an XMM register using (v)pshufb.
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XMM_QWORD_BSWAP:
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.octa 0x08090a0b0c0d0e0f0001020304050607
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# Mergeable 640-byte rodata section. This allows linker to merge the table
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# with other, exactly the same 640-byte fragment of another rodata section
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# (if such section exists).
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.section .rodata.cst640.K512, "aM", @progbits, 640
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.align 64
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# K[t] used in SHA512 hashing
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K512:
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.quad 0x428a2f98d728ae22,0x7137449123ef65cd
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.quad 0xb5c0fbcfec4d3b2f,0xe9b5dba58189dbbc
|
|
.quad 0x3956c25bf348b538,0x59f111f1b605d019
|
|
.quad 0x923f82a4af194f9b,0xab1c5ed5da6d8118
|
|
.quad 0xd807aa98a3030242,0x12835b0145706fbe
|
|
.quad 0x243185be4ee4b28c,0x550c7dc3d5ffb4e2
|
|
.quad 0x72be5d74f27b896f,0x80deb1fe3b1696b1
|
|
.quad 0x9bdc06a725c71235,0xc19bf174cf692694
|
|
.quad 0xe49b69c19ef14ad2,0xefbe4786384f25e3
|
|
.quad 0x0fc19dc68b8cd5b5,0x240ca1cc77ac9c65
|
|
.quad 0x2de92c6f592b0275,0x4a7484aa6ea6e483
|
|
.quad 0x5cb0a9dcbd41fbd4,0x76f988da831153b5
|
|
.quad 0x983e5152ee66dfab,0xa831c66d2db43210
|
|
.quad 0xb00327c898fb213f,0xbf597fc7beef0ee4
|
|
.quad 0xc6e00bf33da88fc2,0xd5a79147930aa725
|
|
.quad 0x06ca6351e003826f,0x142929670a0e6e70
|
|
.quad 0x27b70a8546d22ffc,0x2e1b21385c26c926
|
|
.quad 0x4d2c6dfc5ac42aed,0x53380d139d95b3df
|
|
.quad 0x650a73548baf63de,0x766a0abb3c77b2a8
|
|
.quad 0x81c2c92e47edaee6,0x92722c851482353b
|
|
.quad 0xa2bfe8a14cf10364,0xa81a664bbc423001
|
|
.quad 0xc24b8b70d0f89791,0xc76c51a30654be30
|
|
.quad 0xd192e819d6ef5218,0xd69906245565a910
|
|
.quad 0xf40e35855771202a,0x106aa07032bbd1b8
|
|
.quad 0x19a4c116b8d2d0c8,0x1e376c085141ab53
|
|
.quad 0x2748774cdf8eeb99,0x34b0bcb5e19b48a8
|
|
.quad 0x391c0cb3c5c95a63,0x4ed8aa4ae3418acb
|
|
.quad 0x5b9cca4f7763e373,0x682e6ff3d6b2b8a3
|
|
.quad 0x748f82ee5defb2fc,0x78a5636f43172f60
|
|
.quad 0x84c87814a1f0ab72,0x8cc702081a6439ec
|
|
.quad 0x90befffa23631e28,0xa4506cebde82bde9
|
|
.quad 0xbef9a3f7b2c67915,0xc67178f2e372532b
|
|
.quad 0xca273eceea26619c,0xd186b8c721c0c207
|
|
.quad 0xeada7dd6cde0eb1e,0xf57d4f7fee6ed178
|
|
.quad 0x06f067aa72176fba,0x0a637dc5a2c898a6
|
|
.quad 0x113f9804bef90dae,0x1b710b35131c471b
|
|
.quad 0x28db77f523047d84,0x32caab7b40c72493
|
|
.quad 0x3c9ebe0a15c9bebc,0x431d67c49c100d4c
|
|
.quad 0x4cc5d4becb3e42b6,0x597f299cfc657e2a
|
|
.quad 0x5fcb6fab3ad6faec,0x6c44198c4a475817
|