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-########################################################################
-# Implement fast SHA-512 with SSSE3 instructions. (x86_64)
-#
-# Copyright (C) 2013 Intel Corporation.
-#
-# Authors:
-# James Guilford <james.guilford@intel.com>
-# Kirk Yap <kirk.s.yap@intel.com>
-# David Cote <david.m.cote@intel.com>
-# Tim Chen <tim.c.chen@linux.intel.com>
-#
-# This software is available to you under a choice of one of two
-# licenses. You may choose to be licensed under the terms of the GNU
-# General Public License (GPL) Version 2, available from the file
-# COPYING in the main directory of this source tree, or the
-# OpenIB.org BSD license below:
-#
-# 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.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
-# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
-# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-# SOFTWARE.
-#
-########################################################################
-#
-# This code is described in an Intel White-Paper:
-# "Fast SHA-512 Implementations on Intel Architecture Processors"
-#
-# To find it, surf to http://www.intel.com/p/en_US/embedded
-# and search for that title.
-#
-########################################################################
-
-#include <linux/linkage.h>
-#include <linux/cfi_types.h>
-
-.text
-
-# Virtual Registers
-# ARG1
-digest = %rdi
-# ARG2
-msg = %rsi
-# ARG3
-msglen = %rdx
-T1 = %rcx
-T2 = %r8
-a_64 = %r9
-b_64 = %r10
-c_64 = %r11
-d_64 = %r12
-e_64 = %r13
-f_64 = %r14
-g_64 = %r15
-h_64 = %rbx
-tmp0 = %rax
-
-# Local variables (stack frame)
-
-W_SIZE = 80*8
-WK_SIZE = 2*8
-
-frame_W = 0
-frame_WK = frame_W + W_SIZE
-frame_size = frame_WK + WK_SIZE
-
-# Useful QWORD "arrays" for simpler memory references
-# MSG, DIGEST, K_t, W_t are arrays
-# WK_2(t) points to 1 of 2 qwords at frame.WK depending on t being odd/even
-
-# Input message (arg1)
-#define MSG(i) 8*i(msg)
-
-# Output Digest (arg2)
-#define DIGEST(i) 8*i(digest)
-
-# SHA Constants (static mem)
-#define K_t(i) 8*i+K512(%rip)
-
-# Message Schedule (stack frame)
-#define W_t(i) 8*i+frame_W(%rsp)
-
-# W[t]+K[t] (stack frame)
-#define WK_2(i) 8*((i%2))+frame_WK(%rsp)
-
-.macro RotateState
- # Rotate symbols a..h right
- TMP = h_64
- h_64 = g_64
- g_64 = f_64
- f_64 = e_64
- e_64 = d_64
- d_64 = c_64
- c_64 = b_64
- b_64 = a_64
- a_64 = TMP
-.endm
-
-.macro SHA512_Round rnd
-
- # Compute Round %%t
- mov f_64, T1 # T1 = f
- mov e_64, tmp0 # tmp = e
- xor g_64, T1 # T1 = f ^ g
- ror $23, tmp0 # 41 # tmp = e ror 23
- and e_64, T1 # T1 = (f ^ g) & e
- xor e_64, tmp0 # tmp = (e ror 23) ^ e
- xor g_64, T1 # T1 = ((f ^ g) & e) ^ g = CH(e,f,g)
- idx = \rnd
- add WK_2(idx), T1 # W[t] + K[t] from message scheduler
- ror $4, tmp0 # 18 # tmp = ((e ror 23) ^ e) ror 4
- xor e_64, tmp0 # tmp = (((e ror 23) ^ e) ror 4) ^ e
- mov a_64, T2 # T2 = a
- add h_64, T1 # T1 = CH(e,f,g) + W[t] + K[t] + h
- ror $14, tmp0 # 14 # tmp = ((((e ror23)^e)ror4)^e)ror14 = S1(e)
- add tmp0, T1 # T1 = CH(e,f,g) + W[t] + K[t] + S1(e)
- mov a_64, tmp0 # tmp = a
- xor c_64, T2 # T2 = a ^ c
- and c_64, tmp0 # tmp = a & c
- and b_64, T2 # T2 = (a ^ c) & b
- xor tmp0, T2 # T2 = ((a ^ c) & b) ^ (a & c) = Maj(a,b,c)
- mov a_64, tmp0 # tmp = a
- ror $5, tmp0 # 39 # tmp = a ror 5
- xor a_64, tmp0 # tmp = (a ror 5) ^ a
- add T1, d_64 # e(next_state) = d + T1
- ror $6, tmp0 # 34 # tmp = ((a ror 5) ^ a) ror 6
- xor a_64, tmp0 # tmp = (((a ror 5) ^ a) ror 6) ^ a
- lea (T1, T2), h_64 # a(next_state) = T1 + Maj(a,b,c)
- ror $28, tmp0 # 28 # tmp = ((((a ror5)^a)ror6)^a)ror28 = S0(a)
- add tmp0, h_64 # a(next_state) = T1 + Maj(a,b,c) S0(a)
- RotateState
-.endm
-
-.macro SHA512_2Sched_2Round_sse rnd
-
- # Compute rounds t-2 and t-1
- # Compute message schedule QWORDS t and t+1
-
- # Two rounds are computed based on the values for K[t-2]+W[t-2] and
- # K[t-1]+W[t-1] which were previously stored at WK_2 by the message
- # scheduler.
- # The two new schedule QWORDS are stored at [W_t(%%t)] and [W_t(%%t+1)].
- # They are then added to their respective SHA512 constants at
- # [K_t(%%t)] and [K_t(%%t+1)] and stored at dqword [WK_2(%%t)]
- # For brievity, the comments following vectored instructions only refer to
- # the first of a pair of QWORDS.
- # Eg. XMM2=W[t-2] really means XMM2={W[t-2]|W[t-1]}
- # The computation of the message schedule and the rounds are tightly
- # stitched to take advantage of instruction-level parallelism.
- # For clarity, integer instructions (for the rounds calculation) are indented
- # by one tab. Vectored instructions (for the message scheduler) are indented
- # by two tabs.
-
- mov f_64, T1
- idx = \rnd -2
- movdqa W_t(idx), %xmm2 # XMM2 = W[t-2]
- xor g_64, T1
- and e_64, T1
- movdqa %xmm2, %xmm0 # XMM0 = W[t-2]
- xor g_64, T1
- idx = \rnd
- add WK_2(idx), T1
- idx = \rnd - 15
- movdqu W_t(idx), %xmm5 # XMM5 = W[t-15]
- mov e_64, tmp0
- ror $23, tmp0 # 41
- movdqa %xmm5, %xmm3 # XMM3 = W[t-15]
- xor e_64, tmp0
- ror $4, tmp0 # 18
- psrlq $61-19, %xmm0 # XMM0 = W[t-2] >> 42
- xor e_64, tmp0
- ror $14, tmp0 # 14
- psrlq $(8-7), %xmm3 # XMM3 = W[t-15] >> 1
- add tmp0, T1
- add h_64, T1
- pxor %xmm2, %xmm0 # XMM0 = (W[t-2] >> 42) ^ W[t-2]
- mov a_64, T2
- xor c_64, T2
- pxor %xmm5, %xmm3 # XMM3 = (W[t-15] >> 1) ^ W[t-15]
- and b_64, T2
- mov a_64, tmp0
- psrlq $(19-6), %xmm0 # XMM0 = ((W[t-2]>>42)^W[t-2])>>13
- and c_64, tmp0
- xor tmp0, T2
- psrlq $(7-1), %xmm3 # XMM3 = ((W[t-15]>>1)^W[t-15])>>6
- mov a_64, tmp0
- ror $5, tmp0 # 39
- pxor %xmm2, %xmm0 # XMM0 = (((W[t-2]>>42)^W[t-2])>>13)^W[t-2]
- xor a_64, tmp0
- ror $6, tmp0 # 34
- pxor %xmm5, %xmm3 # XMM3 = (((W[t-15]>>1)^W[t-15])>>6)^W[t-15]
- xor a_64, tmp0
- ror $28, tmp0 # 28
- psrlq $6, %xmm0 # XMM0 = ((((W[t-2]>>42)^W[t-2])>>13)^W[t-2])>>6
- add tmp0, T2
- add T1, d_64
- psrlq $1, %xmm3 # XMM3 = (((W[t-15]>>1)^W[t-15])>>6)^W[t-15]>>1
- lea (T1, T2), h_64
- RotateState
- movdqa %xmm2, %xmm1 # XMM1 = W[t-2]
- mov f_64, T1
- xor g_64, T1
- movdqa %xmm5, %xmm4 # XMM4 = W[t-15]
- and e_64, T1
- xor g_64, T1
- psllq $(64-19)-(64-61) , %xmm1 # XMM1 = W[t-2] << 42
- idx = \rnd + 1
- add WK_2(idx), T1
- mov e_64, tmp0
- psllq $(64-1)-(64-8), %xmm4 # XMM4 = W[t-15] << 7
- ror $23, tmp0 # 41
- xor e_64, tmp0
- pxor %xmm2, %xmm1 # XMM1 = (W[t-2] << 42)^W[t-2]
- ror $4, tmp0 # 18
- xor e_64, tmp0
- pxor %xmm5, %xmm4 # XMM4 = (W[t-15]<<7)^W[t-15]
- ror $14, tmp0 # 14
- add tmp0, T1
- psllq $(64-61), %xmm1 # XMM1 = ((W[t-2] << 42)^W[t-2])<<3
- add h_64, T1
- mov a_64, T2
- psllq $(64-8), %xmm4 # XMM4 = ((W[t-15]<<7)^W[t-15])<<56
- xor c_64, T2
- and b_64, T2
- pxor %xmm1, %xmm0 # XMM0 = s1(W[t-2])
- mov a_64, tmp0
- and c_64, tmp0
- idx = \rnd - 7
- movdqu W_t(idx), %xmm1 # XMM1 = W[t-7]
- xor tmp0, T2
- pxor %xmm4, %xmm3 # XMM3 = s0(W[t-15])
- mov a_64, tmp0
- paddq %xmm3, %xmm0 # XMM0 = s1(W[t-2]) + s0(W[t-15])
- ror $5, tmp0 # 39
- idx =\rnd-16
- paddq W_t(idx), %xmm0 # XMM0 = s1(W[t-2]) + s0(W[t-15]) + W[t-16]
- xor a_64, tmp0
- paddq %xmm1, %xmm0 # XMM0 = s1(W[t-2]) + W[t-7] + s0(W[t-15]) + W[t-16]
- ror $6, tmp0 # 34
- movdqa %xmm0, W_t(\rnd) # Store scheduled qwords
- xor a_64, tmp0
- paddq K_t(\rnd), %xmm0 # Compute W[t]+K[t]
- ror $28, tmp0 # 28
- idx = \rnd
- movdqa %xmm0, WK_2(idx) # Store W[t]+K[t] for next rounds
- add tmp0, T2
- add T1, d_64
- lea (T1, T2), h_64
- RotateState
-.endm
-
-########################################################################
-## void sha512_transform_ssse3(struct sha512_state *state, const u8 *data,
-## int blocks);
-# (struct sha512_state is assumed to begin with u64 state[8])
-# Purpose: Updates the SHA512 digest stored at "state" with the message
-# stored in "data".
-# The size of the message pointed to by "data" must be an integer multiple
-# of SHA512 message blocks.
-# "blocks" is the message length in SHA512 blocks.
-########################################################################
-SYM_TYPED_FUNC_START(sha512_transform_ssse3)
-
- test msglen, msglen
- je .Lnowork
-
- # Save GPRs
- push %rbx
- push %r12
- push %r13
- push %r14
- push %r15
-
- # Allocate Stack Space
- push %rbp
- mov %rsp, %rbp
- sub $frame_size, %rsp
- and $~(0x20 - 1), %rsp
-
-.Lupdateblock:
-
-# Load state variables
- mov DIGEST(0), a_64
- mov DIGEST(1), b_64
- mov DIGEST(2), c_64
- mov DIGEST(3), d_64
- mov DIGEST(4), e_64
- mov DIGEST(5), f_64
- mov DIGEST(6), g_64
- mov DIGEST(7), h_64
-
- t = 0
- .rept 80/2 + 1
- # (80 rounds) / (2 rounds/iteration) + (1 iteration)
- # +1 iteration because the scheduler leads hashing by 1 iteration
- .if t < 2
- # BSWAP 2 QWORDS
- movdqa XMM_QWORD_BSWAP(%rip), %xmm1
- movdqu MSG(t), %xmm0
- pshufb %xmm1, %xmm0 # BSWAP
- movdqa %xmm0, W_t(t) # Store Scheduled Pair
- paddq K_t(t), %xmm0 # Compute W[t]+K[t]
- movdqa %xmm0, WK_2(t) # Store into WK for rounds
- .elseif t < 16
- # BSWAP 2 QWORDS# Compute 2 Rounds
- movdqu MSG(t), %xmm0
- pshufb %xmm1, %xmm0 # BSWAP
- SHA512_Round t-2 # Round t-2
- movdqa %xmm0, W_t(t) # Store Scheduled Pair
- paddq K_t(t), %xmm0 # Compute W[t]+K[t]
- SHA512_Round t-1 # Round t-1
- movdqa %xmm0, WK_2(t) # Store W[t]+K[t] into WK
- .elseif t < 79
- # Schedule 2 QWORDS# Compute 2 Rounds
- SHA512_2Sched_2Round_sse t
- .else
- # Compute 2 Rounds
- SHA512_Round t-2
- SHA512_Round t-1
- .endif
- t = t+2
- .endr
-
- # Update digest
- add a_64, DIGEST(0)
- add b_64, DIGEST(1)
- add c_64, DIGEST(2)
- add d_64, DIGEST(3)
- add e_64, DIGEST(4)
- add f_64, DIGEST(5)
- add g_64, DIGEST(6)
- add h_64, DIGEST(7)
-
- # Advance to next message block
- add $16*8, msg
- dec msglen
- jnz .Lupdateblock
-
- # Restore Stack Pointer
- mov %rbp, %rsp
- pop %rbp
-
- # Restore GPRs
- pop %r15
- pop %r14
- pop %r13
- pop %r12
- pop %rbx
-
-.Lnowork:
- RET
-SYM_FUNC_END(sha512_transform_ssse3)
-
-########################################################################
-### Binary Data
-
-.section .rodata.cst16.XMM_QWORD_BSWAP, "aM", @progbits, 16
-.align 16
-# Mask for byte-swapping a couple of qwords in an XMM register using (v)pshufb.
-XMM_QWORD_BSWAP:
- .octa 0x08090a0b0c0d0e0f0001020304050607
-
-# Mergeable 640-byte rodata section. This allows linker to merge the table
-# with other, exactly the same 640-byte fragment of another rodata section
-# (if such section exists).
-.section .rodata.cst640.K512, "aM", @progbits, 640
-.align 64
-# K[t] used in SHA512 hashing
-K512:
- .quad 0x428a2f98d728ae22,0x7137449123ef65cd
- .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
generated by cgit (git 2.34.1) at 2025-07-29 23:48:29 +0000