########################################################################
# Copyright (c) 2013, Intel Corporation
#
# 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.
#
# * Neither the name of the 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 INTEL CORPORATION ""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 INTEL CORPORATION 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.
########################################################################
##
## Authors:
## Erdinc Ozturk <erdinc.ozturk@intel.com>
## Vinodh Gopal <vinodh.gopal@intel.com>
## James Guilford <james.guilford@intel.com>
## Tim Chen <tim.c.chen@linux.intel.com>
##
## References:
## This code was derived and highly optimized from the code described in paper:
## Vinodh Gopal et. al. Optimized Galois-Counter-Mode Implementation
## on Intel Architecture Processors. August, 2010
## The details of the implementation is explained in:
## Erdinc Ozturk et. al. Enabling High-Performance Galois-Counter-Mode
## on Intel Architecture Processors. October, 2012.
##
## Assumptions:
##
##
##
## iv:
## 0 1 2 3
## 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
## | Salt (From the SA) |
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
## | Initialization Vector |
## | (This is the sequence number from IPSec header) |
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
## | 0x1 |
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
##
##
##
## AAD:
## AAD padded to 128 bits with 0
## for example, assume AAD is a u32 vector
##
## if AAD is 8 bytes:
## AAD[3] = {A0, A1}#
## padded AAD in xmm register = {A1 A0 0 0}
##
## 0 1 2 3
## 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
## | SPI (A1) |
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
## | 32-bit Sequence Number (A0) |
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
## | 0x0 |
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
##
## AAD Format with 32-bit Sequence Number
##
## if AAD is 12 bytes:
## AAD[3] = {A0, A1, A2}#
## padded AAD in xmm register = {A2 A1 A0 0}
##
## 0 1 2 3
## 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
## | SPI (A2) |
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
## | 64-bit Extended Sequence Number {A1,A0} |
## | |
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
## | 0x0 |
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
##
## AAD Format with 64-bit Extended Sequence Number
##
##
## aadLen:
## from the definition of the spec, aadLen can only be 8 or 12 bytes.
## The code additionally supports aadLen of length 16 bytes.
##
## TLen:
## from the definition of the spec, TLen can only be 8, 12 or 16 bytes.
##
## poly = x^128 + x^127 + x^126 + x^121 + 1
## throughout the code, one tab and two tab indentations are used. one tab is
## for GHASH part, two tabs is for AES part.
##
#include <linux/linkage.h>
#include <asm/inst.h>
.data
.align 16
POLY: .octa 0xC2000000000000000000000000000001
POLY2: .octa 0xC20000000000000000000001C2000000
TWOONE: .octa 0x00000001000000000000000000000001
# order of these constants should not change.
# more specifically, ALL_F should follow SHIFT_MASK, and ZERO should follow ALL_F
SHUF_MASK: .octa 0x000102030405060708090A0B0C0D0E0F
SHIFT_MASK: .octa 0x0f0e0d0c0b0a09080706050403020100
ALL_F: .octa 0xffffffffffffffffffffffffffffffff
ZERO: .octa 0x00000000000000000000000000000000
ONE: .octa 0x00000000000000000000000000000001
ONEf: .octa 0x01000000000000000000000000000000
.text
##define the fields of the gcm aes context
#{
# u8 expanded_keys[16*11] store expanded keys
# u8 shifted_hkey_1[16] store HashKey <<1 mod poly here
# u8 shifted_hkey_2[16] store HashKey^2 <<1 mod poly here
# u8 shifted_hkey_3[16] store HashKey^3 <<1 mod poly here
# u8 shifted_hkey_4[16] store HashKey^4 <<1 mod poly here
# u8 shifted_hkey_5[16] store HashKey^5 <<1 mod poly here
# u8 shifted_hkey_6[16] store HashKey^6 <<1 mod poly here
# u8 shifted_hkey_7[16] store HashKey^7 <<1 mod poly here
# u8 shifted_hkey_8[16] store HashKey^8 <<1 mod poly here
# u8 shifted_hkey_1_k[16] store XOR HashKey <<1 mod poly here (for Karatsuba purposes)
# u8 shifted_hkey_2_k[16] store XOR HashKey^2 <<1 mod poly here (for Karatsuba purposes)
# u8 shifted_hkey_3_k[16] store XOR HashKey^3 <<1 mod poly here (for Karatsuba purposes)
# u8 shifted_hkey_4_k[16] store XOR HashKey^4 <<1 mod poly here (for Karatsuba purposes)
# u8 shifted_hkey_5_k[16] store XOR HashKey^5 <<1 mod poly here (for Karatsuba purposes)
# u8 shifted_hkey_6_k[16] store XOR HashKey^6 <<1 mod poly here (for Karatsuba purposes)
# u8 shifted_hkey_7_k[16] store XOR HashKey^7 <<1 mod poly here (for Karatsuba purposes)
# u8 shifted_hkey_8_k[16] store XOR HashKey^8 <<1 mod poly here (for Karatsuba purposes)
#} gcm_ctx#
HashKey = 16*11 # store HashKey <<1 mod poly here
HashKey_2 = 16*12 # store HashKey^2 <<1 mod poly here
HashKey_3 = 16*13 # store HashKey^3 <<1 mod poly here
HashKey_4 = 16*14 # store HashKey^4 <<1 mod poly here
HashKey_5 = 16*15 # store HashKey^5 <<1 mod poly here
HashKey_6 = 16*16 # store HashKey^6 <<1 mod poly here
HashKey_7 = 16*17 # store HashKey^7 <<1 mod poly here
HashKey_8 = 16*18 # store HashKey^8 <<1 mod poly here
HashKey_k = 16*19 # store XOR of HashKey <<1 mod poly here (for Karatsuba purposes)
HashKey_2_k = 16*20 # store XOR of HashKey^2 <<1 mod poly here (for Karatsuba purposes)
HashKey_3_k = 16*21 # store XOR of HashKey^3 <<1 mod poly here (for Karatsuba purposes)
HashKey_4_k = 16*22 # store XOR of HashKey^4 <<1 mod poly here (for Karatsuba purposes)
HashKey_5_k = 16*23 # store XOR of HashKey^5 <<1 mod poly here (for Karatsuba purposes)
HashKey_6_k = 16*24 # store XOR of HashKey^6 <<1 mod poly here (for Karatsuba purposes)
HashKey_7_k = 16*25 # store XOR of HashKey^7 <<1 mod poly here (for Karatsuba purposes)
HashKey_8_k = 16*26 # store XOR of HashKey^8 <<1 mod poly here (for Karatsuba purposes)
#define arg1 %rdi
#define arg2 %rsi
#define arg3 %rdx
#define arg4 %rcx
#define arg5 %r8
#define arg6 %r9
#define arg7 STACK_OFFSET+8*1(%r14)
#define arg8 STACK_OFFSET+8*2(%r14)
#define arg9 STACK_OFFSET+8*3(%r14)
i = 0
j = 0
out_order = 0
in_order = 1
DEC = 0
ENC = 1
.macro define_reg r n
reg_\r = %xmm\n
.endm
.macro setreg
.altmacro
define_reg i %i
define_reg j %j
.noaltmacro
.endm
# need to push 4 registers into stack to maintain
STACK_OFFSET = 8*4
TMP1 = 16*0 # Temporary storage for AAD
TMP2 = 16*1 # Temporary storage for AES State 2 (State 1 is stored in an XMM register)
TMP3 = 16*2 # Temporary storage for AES State 3
TMP4 = 16*3 # Temporary storage for AES State 4
TMP5 = 16*4 # Temporary storage for AES State 5
TMP6 = 16*5 # Temporary storage for AES State 6
TMP7 = 16*6 # Temporary storage for AES State 7
TMP8 = 16*7 # Temporary storage for AES State 8
VARIABLE_OFFSET = 16*8
################################
# Utility Macros
################################
# Encryption of a single block
.macro ENCRYPT_SINGLE_BLOCK XMM0
vpxor (arg1), \XMM0, \XMM0
i = 1
setreg
.rep 9
vaesenc 16*i(arg1), \XMM0, \XMM0
i = (i+1)
setreg
.endr
vaesenclast 16*10(arg1), \XMM0, \XMM0
.endm
#ifdef CONFIG_AS_AVX
###############################################################################
# GHASH_MUL MACRO to implement: Data*HashKey mod (128,127,126,121,0)
# Input: A and B (128-bits each, bit-reflected)
# Output: C = A*B*x mod poly, (i.e. >>1 )
# To compute GH = GH*HashKey mod poly, give HK = HashKey<<1 mod poly as input
# GH = GH * HK * x mod poly which is equivalent to GH*HashKey mod poly.
###############################################################################
.macro GHASH_MUL_AVX GH HK T1 T2 T3 T4 T5
vpshufd $0b01001110, \GH, \T2
vpshufd $0b01001110, \HK, \T3
vpxor \GH , \T2, \T2 # T2 = (a1+a0)
vpxor \HK , \T3, \T3 # T3 = (b1+b0)
vpclmulqdq $0x11, \HK, \GH, \T1 # T1 = a1*b1
vpclmulqdq $0x00, \HK, \GH, \GH # GH = a0*b0
vpclmulqdq $0x00, \T3, \T2, \T2 # T2 = (a1+a0)*(b1+b0)
vpxor \GH, \T2,\T2
vpxor \T1, \T2,\T2 # T2 = a0*b1+a1*b0
vpslldq $8, \T2,\T3 # shift-L T3 2 DWs
vpsrldq $8, \T2,\T2 # shift-R T2 2 DWs
vpxor \T3, \GH, \GH
vpxor \T2, \T1, \T1 # <T1:GH> = GH x HK
#first phase of the reduction
vpslld $31, \GH, \T2 # packed right shifting << 31
vpslld $30, \GH, \T3 # packed right shifting shift << 30
vpslld $25, \GH, \T4 # packed right shifting shift << 25
vpxor \T3, \T2, \T2 # xor the shifted versions
vpxor \T4, \T2, \T2
vpsrldq $4, \T2, \T5 # shift-R T5 1 DW
vpslldq $12, \T2, \T2 # shift-L T2 3 DWs
vpxor \T2, \GH, \GH # first phase of the reduction complete
#second phase of the reduction
vpsrld $1,\GH, \T2 # packed left shifting >> 1
vpsrld $2,\GH, \T3 # packed left shifting >> 2
vpsrld $7,\GH, \T4 # packed left shifting >> 7
vpxor \T3, \T2, \T2 # xor the shifted versions
vpxor \T4, \T2, \T2
vpxor \T5, \T2, \T2
vpxor \T2, \GH, \GH
vpxor \T1, \GH, \GH # the result is in GH
.endm
.macro PRECOMPUTE_AVX HK T1 T2 T3 T4 T5 T6
# Haskey_i_k holds XORed values of the low and high parts of the Haskey_i
vmovdqa \HK, \T5
vpshufd $0b01001110, \T5, \T1
vpxor \T5, \T1, \T1
vmovdqa \T1, HashKey_k(arg1)
GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^2<<1 mod poly
vmovdqa \T5, HashKey_2(arg1) # [HashKey_2] = HashKey^2<<1 mod poly
vpshufd $0b01001110, \T5, \T1
vpxor \T5, \T1, \T1
vmovdqa \T1, HashKey_2_k(arg1)
GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^3<<1 mod poly
vmovdqa \T5, HashKey_3(arg1)
vpshufd $0b01001110, \T5, \T1
vpxor \T5, \T1, \T1
vmovdqa \T1, HashKey_3_k(arg1)
GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^4<<1 mod poly
vmovdqa \T5, HashKey_4(arg1)
vpshufd $0b01001110, \T5, \T1
vpxor \T5, \T1, \T1
vmovdqa \T1, HashKey_4_k(arg1)
GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^5<<1 mod poly
vmovdqa \T5, HashKey_5(arg1)
vpshufd $0b01001110, \T5, \T1
vpxor \T5, \T1, \T1
vmovdqa \T1, HashKey_5_k(arg1)
GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^6<<1 mod poly
vmovdqa \T5, HashKey_6(arg1)
vpshufd $0b01001110, \T5, \T1
vpxor \T5, \T1, \T1
vmovdqa \T1, HashKey_6_k(arg1)
GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^7<<1 mod poly
vmovdqa \T5, HashKey_7(arg1)
vpshufd $0b01001110, \T5, \T1
vpxor \T5, \T1, \T1
vmovdqa \T1, HashKey_7_k(arg1)
GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^8<<1 mod poly
vmovdqa \T5, HashKey_8(arg1)
vpshufd $0b01001110, \T5, \T1
vpxor \T5, \T1, \T1
vmovdqa \T1, HashKey_8_k(arg1)
.endm
## if a = number of total plaintext bytes
## b = floor(a/16)
## num_initial_blocks = b mod 4#
## encrypt the initial num_initial_blocks blocks and apply ghash on the ciphertext
## r10, r11, r12, rax are clobbered
## arg1, arg2, arg3, r14 are used as a pointer only, not modified
.macro INITIAL_BLOCKS_AVX num_initial_blocks T1 T2 T3 T4 T5 CTR XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 T6 T_key ENC_DEC
i = (8-\num_initial_blocks)
setreg
mov arg6, %r10 # r10 = AAD
mov arg7, %r12 # r12 = aadLen
mov %r12, %r11
vpxor reg_i, reg_i, reg_i
_get_AAD_loop\@:
vmovd (%r10), \T1
vpslldq $12, \T1, \T1
vpsrldq $4, reg_i, reg_i
vpxor \T1, reg_i, reg_i
add $4, %r10
sub $4, %r12
jg _get_AAD_loop\@
cmp $16, %r11
je _get_AAD_loop2_done\@
mov $16, %r12
_get_AAD_loop2\@:
vpsrldq $4, reg_i, reg_i
sub $4, %r12
cmp %r11, %r12
jg _get_AAD_loop2\@
_get_AAD_loop2_done\@:
#byte-reflect the AAD data
vpshufb SHUF_MASK(%rip), reg_i, reg_i
# initialize the data pointer offset as zero
xor %r11, %r11
# start AES for num_initial_blocks blocks
mov arg5, %rax # rax = *Y0
vmovdqu (%rax), \CTR # CTR = Y0
vpshufb SHUF_MASK(%rip), \CTR, \CTR
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, reg_i
vpshufb SHUF_MASK(%rip), reg_i, reg_i # perform a 16Byte swap
i = (i+1)
setreg
.endr
vmovdqa (arg1), \T_key
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vpxor \T_key, reg_i, reg_i
i = (i+1)
setreg
.endr
j = 1
setreg
.rep 9
vmovdqa 16*j(arg1), \T_key
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vaesenc \T_key, reg_i, reg_i
i = (i+1)
setreg
.endr
j = (j+1)
setreg
.endr
vmovdqa 16*10(arg1), \T_key
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vaesenclast \T_key, reg_i, reg_i
i = (i+1)
setreg
.endr
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vmovdqu (arg3, %r11), \T1
vpxor \T1, reg_i, reg_i
vmovdqu reg_i, (arg2 , %r11) # write back ciphertext for num_initial_blocks blocks
add $16, %r11
.if \ENC_DEC == DEC
vmovdqa \T1, reg_i
.endif
vpshufb SHUF_MASK(%rip), reg_i, reg_i # prepare ciphertext for GHASH computations
i = (i+1)
setreg
.endr
i = (8-\num_initial_blocks)
j = (9-\num_initial_blocks)
setreg
GHASH_MUL_AVX reg_i, \T2, \T1, \T3, \T4, \T5, \T6
.rep \num_initial_blocks
vpxor reg_i, reg_j, reg_j
GHASH_MUL_AVX reg_j, \T2, \T1, \T3, \T4, \T5, \T6 # apply GHASH on num_initial_blocks blocks
i = (i+1)
j = (j+1)
setreg
.endr
# XMM8 has the combined result here
vmovdqa \XMM8, TMP1(%rsp)
vmovdqa \XMM8, \T3
cmp $128, %r13
jl _initial_blocks_done\@ # no need for precomputed constants
###############################################################################
# Haskey_i_k holds XORed values of the low and high parts of the Haskey_i
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM1
vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM2
vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM3
vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM4
vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM5
vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM6
vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM7
vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM8
vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap
vmovdqa (arg1), \T_key
vpxor \T_key, \XMM1, \XMM1
vpxor \T_key, \XMM2, \XMM2
vpxor \T_key, \XMM3, \XMM3
vpxor \T_key, \XMM4, \XMM4
vpxor \T_key, \XMM5, \XMM5
vpxor \T_key, \XMM6, \XMM6
vpxor \T_key, \XMM7, \XMM7
vpxor \T_key, \XMM8, \XMM8
i = 1
setreg
.rep 9 # do 9 rounds
vmovdqa 16*i(arg1), \T_key
vaesenc \T_key, \XMM1, \XMM1
vaesenc \T_key, \XMM2, \XMM2
vaesenc \T_key, \XMM3, \XMM3
vaesenc \T_key, \XMM4, \XMM4
vaesenc \T_key, \XMM5, \XMM5
vaesenc \T_key, \XMM6, \XMM6
vaesenc \T_key, \XMM7, \XMM7
vaesenc \T_key, \XMM8, \XMM8
i = (i+1)
setreg
.endr
vmovdqa 16*i(arg1), \T_key
vaesenclast \T_key, \XMM1, \XMM1
vaesenclast \T_key, \XMM2, \XMM2
vaesenclast \T_key, \XMM3, \XMM3
vaesenclast \T_key, \XMM4, \XMM4
vaesenclast \T_key, \XMM5, \XMM5
vaesenclast \T_key, \XMM6, \XMM6
vaesenclast \T_key, \XMM7, \XMM7
vaesenclast \T_key, \XMM8, \XMM8
vmovdqu (arg3, %r11), \T1
vpxor \T1, \XMM1, \XMM1
vmovdqu \XMM1, (arg2 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM1
.endif
vmovdqu 16*1(arg3, %r11), \T1
vpxor \T1, \XMM2, \XMM2
vmovdqu \XMM2, 16*1(arg2 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM2
.endif
vmovdqu 16*2(arg3, %r11), \T1
vpxor \T1, \XMM3, \XMM3
vmovdqu \XMM3, 16*2(arg2 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM3
.endif
vmovdqu 16*3(arg3, %r11), \T1
vpxor \T1, \XMM4, \XMM4
vmovdqu \XMM4, 16*3(arg2 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM4
.endif
vmovdqu 16*4(arg3, %r11), \T1
vpxor \T1, \XMM5, \XMM5
vmovdqu \XMM5, 16*4(arg2 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM5
.endif
vmovdqu 16*5(arg3, %r11), \T1
vpxor \T1, \XMM6, \XMM6
vmovdqu \XMM6, 16*5(arg2 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM6
.endif
vmovdqu 16*6(arg3, %r11), \T1
vpxor \T1, \XMM7, \XMM7
vmovdqu \XMM7, 16*6(arg2 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM7
.endif
vmovdqu 16*7(arg3, %r11), \T1
vpxor \T1, \XMM8, \XMM8
vmovdqu \XMM8, 16*7(arg2 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM8
.endif
add $128, %r11
vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap
vpxor TMP1(%rsp), \XMM1, \XMM1 # combine GHASHed value with the corresponding ciphertext
vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap
###############################################################################
_initial_blocks_done\@:
.endm
# encrypt 8 blocks at a time
# ghash the 8 previously encrypted ciphertext blocks
# arg1, arg2, arg3 are used as pointers only, not modified
# r11 is the data offset value
.macro GHASH_8_ENCRYPT_8_PARALLEL_AVX T1 T2 T3 T4 T5 T6 CTR XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 T7 loop_idx ENC_DEC
vmovdqa \XMM1, \T2
vmovdqa \XMM2, TMP2(%rsp)
vmovdqa \XMM3, TMP3(%rsp)
vmovdqa \XMM4, TMP4(%rsp)
vmovdqa \XMM5, TMP5(%rsp)
vmovdqa \XMM6, TMP6(%rsp)
vmovdqa \XMM7, TMP7(%rsp)
vmovdqa \XMM8, TMP8(%rsp)
.if \loop_idx == in_order
vpaddd ONE(%rip), \CTR, \XMM1 # INCR CNT
vpaddd ONE(%rip), \XMM1, \XMM2
vpaddd ONE(%rip), \XMM2, \XMM3
vpaddd ONE(%rip), \XMM3, \XMM4
vpaddd ONE(%rip), \XMM4, \XMM5
vpaddd ONE(%rip), \XMM5, \XMM6
vpaddd ONE(%rip), \XMM6, \XMM7
vpaddd ONE(%rip), \XMM7, \XMM8
vmovdqa \XMM8, \CTR
vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap
.else
vpaddd ONEf(%rip), \CTR, \XMM1 # INCR CNT
vpaddd ONEf(%rip), \XMM1, \XMM2
vpaddd ONEf(%rip), \XMM2, \XMM3
vpaddd ONEf(%rip), \XMM3, \XMM4
vpaddd ONEf(%rip), \XMM4, \XMM5
vpaddd ONEf(%rip), \XMM5, \XMM6
vpaddd ONEf(%rip), \XMM6, \XMM7
vpaddd ONEf(%rip), \XMM7, \XMM8
vmovdqa \XMM8, \CTR
.endif
#######################################################################
vmovdqu (arg1), \T1
vpxor \T1, \XMM1, \XMM1
vpxor \T1, \XMM2, \XMM2
vpxor \T1, \XMM3, \XMM3
vpxor \T1, \XMM4, \XMM4
vpxor \T1, \XMM5, \XMM5
vpxor \T1, \XMM6, \XMM6
vpxor \T1, \XMM7, \XMM7
vpxor \T1, \XMM8, \XMM8
#######################################################################
vmovdqu 16*1(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqu 16*2(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
#######################################################################
vmovdqa HashKey_8(arg1), \T5
vpclmulqdq $0x11, \T5, \T2, \T4 # T4 = a1*b1
vpclmulqdq $0x00, \T5, \T2, \T7 # T7 = a0*b0
vpshufd $0b01001110, \T2, \T6
vpxor \T2, \T6, \T6
vmovdqa HashKey_8_k(arg1), \T5
vpclmulqdq $0x00, \T5, \T6, \T6
vmovdqu 16*3(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP2(%rsp), \T1
vmovdqa HashKey_7(arg1), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpshufd $0b01001110, \T1, \T3
vpxor \T1, \T3, \T3
vmovdqa HashKey_7_k(arg1), \T5
vpclmulqdq $0x10, \T5, \T3, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*4(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
#######################################################################
vmovdqa TMP3(%rsp), \T1
vmovdqa HashKey_6(arg1), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpshufd $0b01001110, \T1, \T3
vpxor \T1, \T3, \T3
vmovdqa HashKey_6_k(arg1), \T5
vpclmulqdq $0x10, \T5, \T3, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*5(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP4(%rsp), \T1
vmovdqa HashKey_5(arg1), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpshufd $0b01001110, \T1, \T3
vpxor \T1, \T3, \T3
vmovdqa HashKey_5_k(arg1), \T5
vpclmulqdq $0x10, \T5, \T3, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*6(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP5(%rsp), \T1
vmovdqa HashKey_4(arg1), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpshufd $0b01001110, \T1, \T3
vpxor \T1, \T3, \T3
vmovdqa HashKey_4_k(arg1), \T5
vpclmulqdq $0x10, \T5, \T3, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*7(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP6(%rsp), \T1
vmovdqa HashKey_3(arg1), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpshufd $0b01001110, \T1, \T3
vpxor \T1, \T3, \T3
vmovdqa HashKey_3_k(arg1), \T5
vpclmulqdq $0x10, \T5, \T3, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*8(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP7(%rsp), \T1
vmovdqa HashKey_2(arg1), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpshufd $0b01001110, \T1, \T3
vpxor \T1, \T3, \T3
vmovdqa HashKey_2_k(arg1), \T5
vpclmulqdq $0x10, \T5, \T3, \T3
vpxor \T3, \T6, \T6
#######################################################################
vmovdqu 16*9(arg1), \T5
vaesenc \T5, \XMM1, \XMM1
vaesenc \T5, \XMM2, \XMM2
vaesenc \T5, \XMM3, \XMM3
vaesenc \T5, \XMM4, \XMM4
vaesenc \T5, \XMM5, \XMM5
vaesenc \T5, \XMM6, \XMM6
vaesenc \T5, \XMM7, \XMM7
vaesenc \T5, \XMM8, \XMM8
vmovdqa TMP8(%rsp), \T1
vmovdqa HashKey(arg1), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpshufd $0b01001110, \T1, \T3
vpxor \T1, \T3, \T3
vmovdqa HashKey_k(arg1), \T5
vpclmulqdq $0x10, \T5, \T3, \T3
vpxor \T3, \T6, \T6
vpxor \T4, \T6, \T6
vpxor \T7, \T6, \T6
vmovdqu 16*10(arg1), \T5
i = 0
j = 1
setreg
.rep 8
vpxor 16*i(arg3, %r11), \T5, \T2
.if \ENC_DEC == ENC
vaesenclast \T2, reg_j, reg_j
.else
vaesenclast \T2, reg_j, \T3
vmovdqu 16*i(arg3, %r11), reg_j
vmovdqu \T3, 16*i(arg2, %r11)
.endif
i = (i+1)
j = (j+1)
setreg
.endr
#######################################################################
vpslldq $8, \T6, \T3 # shift-L T3 2 DWs
vpsrldq $8, \T6, \T6 # shift-R T2 2 DWs
vpxor \T3, \T7, \T7
vpxor \T4, \T6, \T6 # accumulate the results in T6:T7
#######################################################################
#first phase of the reduction
#######################################################################
vpslld $31, \T7, \T2 # packed right shifting << 31
vpslld $30, \T7, \T3 # packed right shifting shift << 30
vpslld $25, \T7, \T4 # packed right shifting shift << 25
vpxor \T3, \T2, \T2 # xor the shifted versions
vpxor \T4, \T2, \T2
vpsrldq $4, \T2, \T1 # shift-R T1 1 DW
vpslldq $12, \T2, \T2 # shift-L T2 3 DWs
vpxor \T2, \T7, \T7 # first phase of the reduction complete
#######################################################################
.if \ENC_DEC == ENC
vmovdqu \XMM1, 16*0(arg2,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM2, 16*1(arg2,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM3, 16*2(arg2,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM4, 16*3(arg2,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM5, 16*4(arg2,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM6, 16*5(arg2,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM7, 16*6(arg2,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM8, 16*7(arg2,%r11) # Write to the Ciphertext buffer
.endif
#######################################################################
#second phase of the reduction
vpsrld $1, \T7, \T2 # packed left shifting >> 1
vpsrld $2, \T7, \T3 # packed left shifting >> 2
vpsrld $7, \T7, \T4 # packed left shifting >> 7
vpxor \T3, \T2, \T2 # xor the shifted versions
vpxor \T4, \T2, \T2
vpxor \T1, \T2, \T2
vpxor \T2, \T7, \T7
vpxor \T7, \T6, \T6 # the result is in T6
#######################################################################
vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap
vpxor \T6, \XMM1, \XMM1
.endm
# GHASH the last 4 ciphertext blocks.
.macro GHASH_LAST_8_AVX T1 T2 T3 T4 T5 T6 T7 XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8
## Karatsuba Method
vpshufd $0b01001110, \XMM1, \T2
vpxor \XMM1, \T2, \T2
vmovdqa HashKey_8(arg1), \T5
vpclmulqdq $0x11, \T5, \XMM1, \T6
vpclmulqdq $0x00, \T5, \XMM1, \T7
vmovdqa HashKey_8_k(arg1), \T3
vpclmulqdq $0x00, \T3, \T2, \XMM1
######################
vpshufd $0b01001110, \XMM2, \T2
vpxor \XMM2, \T2, \T2
vmovdqa HashKey_7(arg1), \T5
vpclmulqdq $0x11, \T5, \XMM2, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM2, \T4
vpxor \T4, \T7, \T7
vmovdqa HashKey_7_k(arg1), \T3
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vpshufd $0b01001110, \XMM3, \T2
vpxor \XMM3, \T2, \T2
vmovdqa HashKey_6(arg1), \T5
vpclmulqdq $0x11, \T5, \XMM3, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM3, \T4
vpxor \T4, \T7, \T7
vmovdqa HashKey_6_k(arg1), \T3
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vpshufd $0b01001110, \XMM4, \T2
vpxor \XMM4, \T2, \T2
vmovdqa HashKey_5(arg1), \T5
vpclmulqdq $0x11, \T5, \XMM4, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM4, \T4
vpxor \T4, \T7, \T7
vmovdqa HashKey_5_k(arg1), \T3
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vpshufd $0b01001110, \XMM5, \T2
vpxor \XMM5, \T2, \T2
vmovdqa HashKey_4(arg1), \T5
vpclmulqdq $0x11, \T5, \XMM5, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM5, \T4
vpxor \T4, \T7, \T7
vmovdqa HashKey_4_k(arg1), \T3
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vpshufd $0b01001110, \XMM6, \T2
vpxor \XMM6, \T2, \T2
vmovdqa HashKey_3(arg1), \T5
vpclmulqdq $0x11, \T5, \XMM6, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM6, \T4
vpxor \T4, \T7, \T7
vmovdqa HashKey_3_k(arg1), \T3
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vpshufd $0b01001110, \XMM7, \T2
vpxor \XMM7, \T2, \T2
vmovdqa HashKey_2(arg1), \T5
vpclmulqdq $0x11, \T5, \XMM7, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM7, \T4
vpxor \T4, \T7, \T7
vmovdqa HashKey_2_k(arg1), \T3
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vpshufd $0b01001110, \XMM8, \T2
vpxor \XMM8, \T2, \T2
vmovdqa HashKey(arg1), \T5
vpclmulqdq $0x11, \T5, \XMM8, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM8, \T4
vpxor \T4, \T7, \T7
vmovdqa HashKey_k(arg1), \T3
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
vpxor \T6, \XMM1, \XMM1
vpxor \T7, \XMM1, \T2
vpslldq $8, \T2, \T4
vpsrldq $8, \T2, \T2
vpxor \T4, \T7, \T7
vpxor \T2, \T6, \T6 # <T6:T7> holds the result of
# the accumulated carry-less multiplications
#######################################################################
#first phase of the reduction
vpslld $31, \T7, \T2 # packed right shifting << 31
vpslld $30, \T7, \T3 # packed right shifting shift << 30
vpslld $25, \T7, \T4 # packed right shifting shift << 25
vpxor \T3, \T2, \T2 # xor the shifted versions
vpxor \T4, \T2, \T2
vpsrldq $4, \T2, \T1 # shift-R T1 1 DW
vpslldq $12, \T2, \T2 # shift-L T2 3 DWs
vpxor \T2, \T7, \T7 # first phase of the reduction complete
#######################################################################
#second phase of the reduction
vpsrld $1, \T7, \T2 # packed left shifting >> 1
vpsrld $2, \T7, \T3 # packed left shifting >> 2
vpsrld $7, \T7, \T4 # packed left shifting >> 7
vpxor \T3, \T2, \T2 # xor the shifted versions
vpxor \T4, \T2, \T2
vpxor \T1, \T2, \T2
vpxor \T2, \T7, \T7
vpxor \T7, \T6, \T6 # the result is in T6
.endm
# combined for GCM encrypt and decrypt functions
# clobbering all xmm registers
# clobbering r10, r11, r12, r13, r14, r15
.macro GCM_ENC_DEC_AVX ENC_DEC
#the number of pushes must equal STACK_OFFSET
push %r12
push %r13
push %r14
push %r15
mov %rsp, %r14
sub $VARIABLE_OFFSET, %rsp
and $~63, %rsp # align rsp to 64 bytes
vmovdqu HashKey(arg1), %xmm13 # xmm13 = HashKey
mov arg4, %r13 # save the number of bytes of plaintext/ciphertext
and $-16, %r13 # r13 = r13 - (r13 mod 16)
mov %r13, %r12
shr $4, %r12
and $7, %r12
jz _initial_num_blocks_is_0\@
cmp $7, %r12
je _initial_num_blocks_is_7\@
cmp $6, %r12
je _initial_num_blocks_is_6\@
cmp $5, %r12
je _initial_num_blocks_is_5\@
cmp $4, %r12
je _initial_num_blocks_is_4\@
cmp $3, %r12
je _initial_num_blocks_is_3\@
cmp $2, %r12
je _initial_num_blocks_is_2\@
jmp _initial_num_blocks_is_1\@
_initial_num_blocks_is_7\@:
INITIAL_BLOCKS_AVX 7, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*7, %r13
jmp _initial_blocks_encrypted\@
_initial_num_blocks_is_6\@:
INITIAL_BLOCKS_AVX 6, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*6, %r13
jmp _initial_blocks_encrypted\@
_initial_num_blocks_is_5\@:
INITIAL_BLOCKS_AVX 5, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*5, %r13
jmp _initial_blocks_encrypted\@
_initial_num_blocks_is_4\@:
INITIAL_BLOCKS_AVX 4, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*4, %r13
jmp _initial_blocks_encrypted\@
_initial_num_blocks_is_3\@:
INITIAL_BLOCKS_AVX 3, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*3, %r13
jmp _initial_blocks_encrypted\@
_initial_num_blocks_is_2\@:
INITIAL_BLOCKS_AVX 2, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*2, %r13
jmp _initial_blocks_encrypted\@
_initial_num_blocks_is_1\@:
INITIAL_BLOCKS_AVX 1, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*1, %r13
jmp _initial_blocks_encrypted\@
_initial_num_blocks_is_0\@:
INITIAL_BLOCKS_AVX 0, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
_initial_blocks_encrypted\@:
cmp $0, %r13
je _zero_cipher_left\@
sub $128, %r13
je _eight_cipher_left\@
vmovd %xmm9, %r15d
and $255, %r15d
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
_encrypt_by_8_new\@:
cmp $(255-8), %r15d
jg _encrypt_by_8\@
add $8, %r15b
GHASH_8_ENCRYPT_8_PARALLEL_AVX %xmm0, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm15, out_order, \ENC_DEC
add $128, %r11
sub $128, %r13
jne _encrypt_by_8_new\@
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
jmp _eight_cipher_left\@
_encrypt_by_8\@:
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
add $8, %r15b
GHASH_8_ENCRYPT_8_PARALLEL_AVX %xmm0, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm15, in_order, \ENC_DEC
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
add $128, %r11
sub $128, %r13
jne _encrypt_by_8_new\@
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
_eight_cipher_left\@:
GHASH_LAST_8_AVX %xmm0, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, %xmm15, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8
_zero_cipher_left\@:
cmp $16, arg4
jl _only_less_than_16\@
mov arg4, %r13
and $15, %r13 # r13 = (arg4 mod 16)
je _multiple_of_16_bytes\@
# handle the last <16 Byte block seperately
vpaddd ONE(%rip), %xmm9, %xmm9 # INCR CNT to get Yn
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
ENCRYPT_SINGLE_BLOCK %xmm9 # E(K, Yn)
sub $16, %r11
add %r13, %r11
vmovdqu (arg3, %r11), %xmm1 # receive the last <16 Byte block
lea SHIFT_MASK+16(%rip), %r12
sub %r13, %r12 # adjust the shuffle mask pointer to be
# able to shift 16-r13 bytes (r13 is the
# number of bytes in plaintext mod 16)
vmovdqu (%r12), %xmm2 # get the appropriate shuffle mask
vpshufb %xmm2, %xmm1, %xmm1 # shift right 16-r13 bytes
jmp _final_ghash_mul\@
_only_less_than_16\@:
# check for 0 length
mov arg4, %r13
and $15, %r13 # r13 = (arg4 mod 16)
je _multiple_of_16_bytes\@
# handle the last <16 Byte block seperately
vpaddd ONE(%rip), %xmm9, %xmm9 # INCR CNT to get Yn
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
ENCRYPT_SINGLE_BLOCK %xmm9 # E(K, Yn)
lea SHIFT_MASK+16(%rip), %r12
sub %r13, %r12 # adjust the shuffle mask pointer to be
# able to shift 16-r13 bytes (r13 is the
# number of bytes in plaintext mod 16)
_get_last_16_byte_loop\@:
movb (arg3, %r11), %al
movb %al, TMP1 (%rsp , %r11)
add $1, %r11
cmp %r13, %r11
jne _get_last_16_byte_loop\@
vmovdqu TMP1(%rsp), %xmm1
sub $16, %r11
_final_ghash_mul\@:
.if \ENC_DEC == DEC
vmovdqa %xmm1, %xmm2
vpxor %xmm1, %xmm9, %xmm9 # Plaintext XOR E(K, Yn)
vmovdqu ALL_F-SHIFT_MASK(%r12), %xmm1 # get the appropriate mask to
# mask out top 16-r13 bytes of xmm9
vpand %xmm1, %xmm9, %xmm9 # mask out top 16-r13 bytes of xmm9
vpand %xmm1, %xmm2, %xmm2
vpshufb SHUF_MASK(%rip), %xmm2, %xmm2
vpxor %xmm2, %xmm14, %xmm14
#GHASH computation for the last <16 Byte block
GHASH_MUL_AVX %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6
sub %r13, %r11
add $16, %r11
.else
vpxor %xmm1, %xmm9, %xmm9 # Plaintext XOR E(K, Yn)
vmovdqu ALL_F-SHIFT_MASK(%r12), %xmm1 # get the appropriate mask to
# mask out top 16-r13 bytes of xmm9
vpand %xmm1, %xmm9, %xmm9 # mask out top 16-r13 bytes of xmm9
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
vpxor %xmm9, %xmm14, %xmm14
#GHASH computation for the last <16 Byte block
GHASH_MUL_AVX %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6
sub %r13, %r11
add $16, %r11
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 # shuffle xmm9 back to output as ciphertext
.endif
#############################
# output r13 Bytes
vmovq %xmm9, %rax
cmp $8, %r13
jle _less_than_8_bytes_left\@
mov %rax, (arg2 , %r11)
add $8, %r11
vpsrldq $8, %xmm9, %xmm9
vmovq %xmm9, %rax
sub $8, %r13
_less_than_8_bytes_left\@:
movb %al, (arg2 , %r11)
add $1, %r11
shr $8, %rax
sub $1, %r13
jne _less_than_8_bytes_left\@
#############################
_multiple_of_16_bytes\@:
mov arg7, %r12 # r12 = aadLen (number of bytes)
shl $3, %r12 # convert into number of bits
vmovd %r12d, %xmm15 # len(A) in xmm15
shl $3, arg4 # len(C) in bits (*128)
vmovq arg4, %xmm1
vpslldq $8, %xmm15, %xmm15 # xmm15 = len(A)|| 0x0000000000000000
vpxor %xmm1, %xmm15, %xmm15 # xmm15 = len(A)||len(C)
vpxor %xmm15, %xmm14, %xmm14
GHASH_MUL_AVX %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6 # final GHASH computation
vpshufb SHUF_MASK(%rip), %xmm14, %xmm14 # perform a 16Byte swap
mov arg5, %rax # rax = *Y0
vmovdqu (%rax), %xmm9 # xmm9 = Y0
ENCRYPT_SINGLE_BLOCK %xmm9 # E(K, Y0)
vpxor %xmm14, %xmm9, %xmm9
_return_T\@:
mov arg8, %r10 # r10 = authTag
mov arg9, %r11 # r11 = auth_tag_len
cmp $16, %r11
je _T_16\@
cmp $12, %r11
je _T_12\@
_T_8\@:
vmovq %xmm9, %rax
mov %rax, (%r10)
jmp _return_T_done\@
_T_12\@:
vmovq %xmm9, %rax
mov %rax, (%r10)
vpsrldq $8, %xmm9, %xmm9
vmovd %xmm9, %eax
mov %eax, 8(%r10)
jmp _return_T_done\@
_T_16\@:
vmovdqu %xmm9, (%r10)
_return_T_done\@:
mov %r14, %rsp
pop %r15
pop %r14
pop %r13
pop %r12
.endm
#############################################################
#void aesni_gcm_precomp_avx_gen2
# (gcm_data *my_ctx_data,
# u8 *hash_subkey)# /* H, the Hash sub key input. Data starts on a 16-byte boundary. */
#############################################################
ENTRY(aesni_gcm_precomp_avx_gen2)
#the number of pushes must equal STACK_OFFSET
push %r12
push %r13
push %r14
push %r15
mov %rsp, %r14
sub $VARIABLE_OFFSET, %rsp
and $~63, %rsp # align rsp to 64 bytes
vmovdqu (arg2), %xmm6 # xmm6 = HashKey
vpshufb SHUF_MASK(%rip), %xmm6, %xmm6
############### PRECOMPUTATION of HashKey<<1 mod poly from the HashKey
vmovdqa %xmm6, %xmm2
vpsllq $1, %xmm6, %xmm6
vpsrlq $63, %xmm2, %xmm2
vmovdqa %xmm2, %xmm1
vpslldq $8, %xmm2, %xmm2
vpsrldq $8, %xmm1, %xmm1
vpor %xmm2, %xmm6, %xmm6
#reduction
vpshufd $0b00100100, %xmm1, %xmm2
vpcmpeqd TWOONE(%rip), %xmm2, %xmm2
vpand POLY(%rip), %xmm2, %xmm2
vpxor %xmm2, %xmm6, %xmm6 # xmm6 holds the HashKey<<1 mod poly
#######################################################################
vmovdqa %xmm6, HashKey(arg1) # store HashKey<<1 mod poly
PRECOMPUTE_AVX %xmm6, %xmm0, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5
mov %r14, %rsp
pop %r15
pop %r14
pop %r13
pop %r12
ret
ENDPROC(aesni_gcm_precomp_avx_gen2)
###############################################################################
#void aesni_gcm_enc_avx_gen2(
# gcm_data *my_ctx_data, /* aligned to 16 Bytes */
# u8 *out, /* Ciphertext output. Encrypt in-place is allowed. */
# const u8 *in, /* Plaintext input */
# u64 plaintext_len, /* Length of data in Bytes for encryption. */
# u8 *iv, /* Pre-counter block j0: 4 byte salt
# (from Security Association) concatenated with 8 byte
# Initialisation Vector (from IPSec ESP Payload)
# concatenated with 0x00000001. 16-byte aligned pointer. */
# const u8 *aad, /* Additional Authentication Data (AAD)*/
# u64 aad_len, /* Length of AAD in bytes. With RFC4106 this is going to be 8 or 12 Bytes */
# u8 *auth_tag, /* Authenticated Tag output. */
# u64 auth_tag_len)# /* Authenticated Tag Length in bytes.
# Valid values are 16 (most likely), 12 or 8. */
###############################################################################
ENTRY(aesni_gcm_enc_avx_gen2)
GCM_ENC_DEC_AVX ENC
ret
ENDPROC(aesni_gcm_enc_avx_gen2)
###############################################################################
#void aesni_gcm_dec_avx_gen2(
# gcm_data *my_ctx_data, /* aligned to 16 Bytes */
# u8 *out, /* Plaintext output. Decrypt in-place is allowed. */
# const u8 *in, /* Ciphertext input */
# u64 plaintext_len, /* Length of data in Bytes for encryption. */
# u8 *iv, /* Pre-counter block j0: 4 byte salt
# (from Security Association) concatenated with 8 byte
# Initialisation Vector (from IPSec ESP Payload)
# concatenated with 0x00000001. 16-byte aligned pointer. */
# const u8 *aad, /* Additional Authentication Data (AAD)*/
# u64 aad_len, /* Length of AAD in bytes. With RFC4106 this is going to be 8 or 12 Bytes */
# u8 *auth_tag, /* Authenticated Tag output. */
# u64 auth_tag_len)# /* Authenticated Tag Length in bytes.
# Valid values are 16 (most likely), 12 or 8. */
###############################################################################
ENTRY(aesni_gcm_dec_avx_gen2)
GCM_ENC_DEC_AVX DEC
ret
ENDPROC(aesni_gcm_dec_avx_gen2)
#endif /* CONFIG_AS_AVX */
#ifdef CONFIG_AS_AVX2
###############################################################################
# GHASH_MUL MACRO to implement: Data*HashKey mod (128,127,126,121,0)
# Input: A and B (128-bits each, bit-reflected)
# Output: C = A*B*x mod poly, (i.e. >>1 )
# To compute GH = GH*HashKey mod poly, give HK = HashKey<<1 mod poly as input
# GH = GH * HK * x mod poly which is equivalent to GH*HashKey mod poly.
###############################################################################
.macro GHASH_MUL_AVX2 GH HK T1 T2 T3 T4 T5
vpclmulqdq $0x11,\HK,\GH,\T1 # T1 = a1*b1
vpclmulqdq $0x00,\HK,\GH,\T2 # T2 = a0*b0
vpclmulqdq $0x01,\HK,\GH,\T3 # T3 = a1*b0
vpclmulqdq $0x10,\HK,\GH,\GH # GH = a0*b1
vpxor \T3, \GH, \GH
vpsrldq $8 , \GH, \T3 # shift-R GH 2 DWs
vpslldq $8 , \GH, \GH # shift-L GH 2 DWs
vpxor \T3, \T1, \T1
vpxor \T2, \GH, \GH
#######################################################################
#first phase of the reduction
vmovdqa POLY2(%rip), \T3
vpclmulqdq $0x01, \GH, \T3, \T2
vpslldq $8, \T2, \T2 # shift-L T2 2 DWs
vpxor \T2, \GH, \GH # first phase of the reduction complete
#######################################################################
#second phase of the reduction
vpclmulqdq $0x00, \GH, \T3, \T2
vpsrldq $4, \T2, \T2 # shift-R T2 1 DW (Shift-R only 1-DW to obtain 2-DWs shift-R)
vpclmulqdq $0x10, \GH, \T3, \GH
vpslldq $4, \GH, \GH # shift-L GH 1 DW (Shift-L 1-DW to obtain result with no shifts)
vpxor \T2, \GH, \GH # second phase of the reduction complete
#######################################################################
vpxor \T1, \GH, \GH # the result is in GH
.endm
.macro PRECOMPUTE_AVX2 HK T1 T2 T3 T4 T5 T6
# Haskey_i_k holds XORed values of the low and high parts of the Haskey_i
vmovdqa \HK, \T5
GHASH_MUL_AVX2 \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^2<<1 mod poly
vmovdqa \T5, HashKey_2(arg1) # [HashKey_2] = HashKey^2<<1 mod poly
GHASH_MUL_AVX2 \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^3<<1 mod poly
vmovdqa \T5, HashKey_3(arg1)
GHASH_MUL_AVX2 \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^4<<1 mod poly
vmovdqa \T5, HashKey_4(arg1)
GHASH_MUL_AVX2 \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^5<<1 mod poly
vmovdqa \T5, HashKey_5(arg1)
GHASH_MUL_AVX2 \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^6<<1 mod poly
vmovdqa \T5, HashKey_6(arg1)
GHASH_MUL_AVX2 \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^7<<1 mod poly
vmovdqa \T5, HashKey_7(arg1)
GHASH_MUL_AVX2 \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^8<<1 mod poly
vmovdqa \T5, HashKey_8(arg1)
.endm
## if a = number of total plaintext bytes
## b = floor(a/16)
## num_initial_blocks = b mod 4#
## encrypt the initial num_initial_blocks blocks and apply ghash on the ciphertext
## r10, r11, r12, rax are clobbered
## arg1, arg2, arg3, r14 are used as a pointer only, not modified
.macro INITIAL_BLOCKS_AVX2 num_initial_blocks T1 T2 T3 T4 T5 CTR XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 T6 T_key ENC_DEC VER
i = (8-\num_initial_blocks)
setreg
mov arg6, %r10 # r10 = AAD
mov arg7, %r12 # r12 = aadLen
mov %r12, %r11
vpxor reg_i, reg_i, reg_i
_get_AAD_loop\@:
vmovd (%r10), \T1
vpslldq $12, \T1, \T1
vpsrldq $4, reg_i, reg_i
vpxor \T1, reg_i, reg_i
add $4, %r10
sub $4, %r12
jg _get_AAD_loop\@
cmp $16, %r11
je _get_AAD_loop2_done\@
mov $16, %r12
_get_AAD_loop2\@:
vpsrldq $4, reg_i, reg_i
sub $4, %r12
cmp %r11, %r12
jg _get_AAD_loop2\@
_get_AAD_loop2_done\@:
#byte-reflect the AAD data
vpshufb SHUF_MASK(%rip), reg_i, reg_i
# initialize the data pointer offset as zero
xor %r11, %r11
# start AES for num_initial_blocks blocks
mov arg5, %rax # rax = *Y0
vmovdqu (%rax), \CTR # CTR = Y0
vpshufb SHUF_MASK(%rip), \CTR, \CTR
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, reg_i
vpshufb SHUF_MASK(%rip), reg_i, reg_i # perform a 16Byte swap
i = (i+1)
setreg
.endr
vmovdqa (arg1), \T_key
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vpxor \T_key, reg_i, reg_i
i = (i+1)
setreg
.endr
j = 1
setreg
.rep 9
vmovdqa 16*j(arg1), \T_key
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vaesenc \T_key, reg_i, reg_i
i = (i+1)
setreg
.endr
j = (j+1)
setreg
.endr
vmovdqa 16*10(arg1), \T_key
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vaesenclast \T_key, reg_i, reg_i
i = (i+1)
setreg
.endr
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vmovdqu (arg3, %r11), \T1
vpxor \T1, reg_i, reg_i
vmovdqu reg_i, (arg2 , %r11) # write back ciphertext for
# num_initial_blocks blocks
add $16, %r11
.if \ENC_DEC == DEC
vmovdqa \T1, reg_i
.endif
vpshufb SHUF_MASK(%rip), reg_i, reg_i # prepare ciphertext for GHASH computations
i = (i+1)
setreg
.endr
i = (8-\num_initial_blocks)
j = (9-\num_initial_blocks)
setreg
GHASH_MUL_AVX2 reg_i, \T2, \T1, \T3, \T4, \T5, \T6
.rep \num_initial_blocks
vpxor reg_i, reg_j, reg_j
GHASH_MUL_AVX2 reg_j, \T2, \T1, \T3, \T4, \T5, \T6 # apply GHASH on num_initial_blocks blocks
i = (i+1)
j = (j+1)
setreg
.endr
# XMM8 has the combined result here
vmovdqa \XMM8, TMP1(%rsp)
vmovdqa \XMM8, \T3
cmp $128, %r13
jl _initial_blocks_done\@ # no need for precomputed constants
###############################################################################
# Haskey_i_k holds XORed values of the low and high parts of the Haskey_i
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM1
vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM2
vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM3
vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM4
vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM5
vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM6
vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM7
vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM8
vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap
vmovdqa (arg1), \T_key
vpxor \T_key, \XMM1, \XMM1
vpxor \T_key, \XMM2, \XMM2
vpxor \T_key, \XMM3, \XMM3
vpxor \T_key, \XMM4, \XMM4
vpxor \T_key, \XMM5, \XMM5
vpxor \T_key, \XMM6, \XMM6
vpxor \T_key, \XMM7, \XMM7
vpxor \T_key, \XMM8, \XMM8
i = 1
setreg
.rep 9 # do 9 rounds
vmovdqa 16*i(arg1), \T_key
vaesenc \T_key, \XMM1, \XMM1
vaesenc \T_key, \XMM2, \XMM2
vaesenc \T_key, \XMM3, \XMM3
vaesenc \T_key, \XMM4, \XMM4
vaesenc \T_key, \XMM5, \XMM5
vaesenc \T_key, \XMM6, \XMM6
vaesenc \T_key, \XMM7, \XMM7
vaesenc \T_key, \XMM8, \XMM8
i = (i+1)
setreg
.endr
vmovdqa 16*i(arg1), \T_key
vaesenclast \T_key, \XMM1, \XMM1
vaesenclast \T_key, \XMM2, \XMM2
vaesenclast \T_key, \XMM3, \XMM3
vaesenclast \T_key, \XMM4, \XMM4
vaesenclast \T_key, \XMM5, \XMM5
vaesenclast \T_key, \XMM6, \XMM6
vaesenclast \T_key, \XMM7, \XMM7
vaesenclast \T_key, \XMM8, \XMM8
vmovdqu (arg3, %r11), \T1
vpxor \T1, \XMM1, \XMM1
vmovdqu \XMM1, (arg2 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM1
.endif
vmovdqu 16*1(arg3, %r11), \T1
vpxor \T1, \XMM2, \XMM2
vmovdqu \XMM2, 16*1(arg2 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM2
.endif
vmovdqu 16*2(arg3, %r11), \T1
vpxor \T1, \XMM3, \XMM3
vmovdqu \XMM3, 16*2(arg2 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM3
.endif
vmovdqu 16*3(arg3, %r11), \T1
vpxor \T1, \XMM4, \XMM4
vmovdqu \XMM4, 16*3(arg2 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM4
.endif
vmovdqu 16*4(arg3, %r11), \T1
vpxor \T1, \XMM5, \XMM5
vmovdqu \XMM5, 16*4(arg2 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM5
.endif
vmovdqu 16*5(arg3, %r11), \T1
vpxor \T1, \XMM6, \XMM6
vmovdqu \XMM6, 16*5(arg2 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM6
.endif
vmovdqu 16*6(arg3, %r11), \T1
vpxor \T1, \XMM7, \XMM7
vmovdqu \XMM7, 16*6(arg2 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM7
.endif
vmovdqu 16*7(arg3, %r11), \T1
vpxor \T1, \XMM8, \XMM8
vmovdqu \XMM8, 16*7(arg2 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM8
.endif
add $128, %r11
vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap
vpxor TMP1(%rsp), \XMM1, \XMM1 # combine GHASHed value with
# the corresponding ciphertext
vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap
###############################################################################
_initial_blocks_done\@:
.endm
# encrypt 8 blocks at a time
# ghash the 8 previously encrypted ciphertext blocks
# arg1, arg2, arg3 are used as pointers only, not modified
# r11 is the data offset value
.macro GHASH_8_ENCRYPT_8_PARALLEL_AVX2 T1 T2 T3 T4 T5 T6 CTR XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 T7 loop_idx ENC_DEC
vmovdqa \XMM1, \T2
vmovdqa \XMM2, TMP2(%rsp)
vmovdqa \XMM3, TMP3(%rsp)
vmovdqa \XMM4, TMP4(%rsp)
vmovdqa \XMM5, TMP5(%rsp)
vmovdqa \XMM6, TMP6(%rsp)
vmovdqa \XMM7, TMP7(%rsp)
vmovdqa \XMM8, TMP8(%rsp)
.if \loop_idx == in_order
vpaddd ONE(%rip), \CTR, \XMM1 # INCR CNT
vpaddd ONE(%rip), \XMM1, \XMM2
vpaddd ONE(%rip), \XMM2, \XMM3
vpaddd ONE(%rip), \XMM3, \XMM4
vpaddd ONE(%rip), \XMM4, \XMM5
vpaddd ONE(%rip), \XMM5, \XMM6
vpaddd ONE(%rip), \XMM6, \XMM7
vpaddd ONE(%rip), \XMM7, \XMM8
vmovdqa \XMM8, \CTR
vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap
.else
vpaddd ONEf(%rip), \CTR, \XMM1 # INCR CNT
vpaddd ONEf(%rip), \XMM1, \XMM2
vpaddd ONEf(%rip), \XMM2, \XMM3
vpaddd ONEf(%rip), \XMM3, \XMM4
vpaddd ONEf(%rip), \XMM4, \XMM5
vpaddd ONEf(%rip), \XMM5, \XMM6
vpaddd ONEf(%rip), \XMM6, \XMM7
vpaddd ONEf(%rip), \XMM7, \XMM8
vmovdqa \XMM8, \CTR
.endif
#######################################################################
vmovdqu (arg1), \T1
vpxor \T1, \XMM1, \XMM1
vpxor \T1, \XMM2, \XMM2
vpxor \T1, \XMM3, \XMM3
vpxor \T1, \XMM4, \XMM4
vpxor \T1, \XMM5, \XMM5
vpxor \T1, \XMM6, \XMM6
vpxor \T1, \XMM7, \XMM7
vpxor \T1, \XMM8, \XMM8
#######################################################################
vmovdqu 16*1(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqu 16*2(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
#######################################################################
vmovdqa HashKey_8(arg1), \T5
vpclmulqdq $0x11, \T5, \T2, \T4 # T4 = a1*b1
vpclmulqdq $0x00, \T5, \T2, \T7 # T7 = a0*b0
vpclmulqdq $0x01, \T5, \T2, \T6 # T6 = a1*b0
vpclmulqdq $0x10, \T5, \T2, \T5 # T5 = a0*b1
vpxor \T5, \T6, \T6
vmovdqu 16*3(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP2(%rsp), \T1
vmovdqa HashKey_7(arg1), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpclmulqdq $0x01, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vpclmulqdq $0x10, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*4(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
#######################################################################
vmovdqa TMP3(%rsp), \T1
vmovdqa HashKey_6(arg1), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpclmulqdq $0x01, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vpclmulqdq $0x10, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*5(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP4(%rsp), \T1
vmovdqa HashKey_5(arg1), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpclmulqdq $0x01, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vpclmulqdq $0x10, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*6(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP5(%rsp), \T1
vmovdqa HashKey_4(arg1), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpclmulqdq $0x01, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vpclmulqdq $0x10, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*7(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP6(%rsp), \T1
vmovdqa HashKey_3(arg1), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpclmulqdq $0x01, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vpclmulqdq $0x10, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*8(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP7(%rsp), \T1
vmovdqa HashKey_2(arg1), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpclmulqdq $0x01, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vpclmulqdq $0x10, \T5, \T1, \T3
vpxor \T3, \T6, \T6
#######################################################################
vmovdqu 16*9(arg1), \T5
vaesenc \T5, \XMM1, \XMM1
vaesenc \T5, \XMM2, \XMM2
vaesenc \T5, \XMM3, \XMM3
vaesenc \T5, \XMM4, \XMM4
vaesenc \T5, \XMM5, \XMM5
vaesenc \T5, \XMM6, \XMM6
vaesenc \T5, \XMM7, \XMM7
vaesenc \T5, \XMM8, \XMM8
vmovdqa TMP8(%rsp), \T1
vmovdqa HashKey(arg1), \T5
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpclmulqdq $0x01, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vpclmulqdq $0x10, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T1
vmovdqu 16*10(arg1), \T5
i = 0
j = 1
setreg
.rep 8
vpxor 16*i(arg3, %r11), \T5, \T2
.if \ENC_DEC == ENC
vaesenclast \T2, reg_j, reg_j
.else
vaesenclast \T2, reg_j, \T3
vmovdqu 16*i(arg3, %r11), reg_j
vmovdqu \T3, 16*i(arg2, %r11)
.endif
i = (i+1)
j = (j+1)
setreg
.endr
#######################################################################
vpslldq $8, \T6, \T3 # shift-L T3 2 DWs
vpsrldq $8, \T6, \T6 # shift-R T2 2 DWs
vpxor \T3, \T7, \T7
vpxor \T6, \T1, \T1 # accumulate the results in T1:T7
#######################################################################
#first phase of the reduction
vmovdqa POLY2(%rip), \T3
vpclmulqdq $0x01, \T7, \T3, \T2
vpslldq $8, \T2, \T2 # shift-L xmm2 2 DWs
vpxor \T2, \T7, \T7 # first phase of the reduction complete
#######################################################################
.if \ENC_DEC == ENC
vmovdqu \XMM1, 16*0(arg2,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM2, 16*1(arg2,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM3, 16*2(arg2,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM4, 16*3(arg2,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM5, 16*4(arg2,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM6, 16*5(arg2,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM7, 16*6(arg2,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM8, 16*7(arg2,%r11) # Write to the Ciphertext buffer
.endif
#######################################################################
#second phase of the reduction
vpclmulqdq $0x00, \T7, \T3, \T2
vpsrldq $4, \T2, \T2 # shift-R xmm2 1 DW (Shift-R only 1-DW to obtain 2-DWs shift-R)
vpclmulqdq $0x10, \T7, \T3, \T4
vpslldq $4, \T4, \T4 # shift-L xmm0 1 DW (Shift-L 1-DW to obtain result with no shifts)
vpxor \T2, \T4, \T4 # second phase of the reduction complete
#######################################################################
vpxor \T4, \T1, \T1 # the result is in T1
vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap
vpxor \T1, \XMM1, \XMM1
.endm
# GHASH the last 4 ciphertext blocks.
.macro GHASH_LAST_8_AVX2 T1 T2 T3 T4 T5 T6 T7 XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8
## Karatsuba Method
vmovdqa HashKey_8(arg1), \T5
vpshufd $0b01001110, \XMM1, \T2
vpshufd $0b01001110, \T5, \T3
vpxor \XMM1, \T2, \T2
vpxor \T5, \T3, \T3
vpclmulqdq $0x11, \T5, \XMM1, \T6
vpclmulqdq $0x00, \T5, \XMM1, \T7
vpclmulqdq $0x00, \T3, \T2, \XMM1
######################
vmovdqa HashKey_7(arg1), \T5
vpshufd $0b01001110, \XMM2, \T2
vpshufd $0b01001110, \T5, \T3
vpxor \XMM2, \T2, \T2
vpxor \T5, \T3, \T3
vpclmulqdq $0x11, \T5, \XMM2, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM2, \T4
vpxor \T4, \T7, \T7
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vmovdqa HashKey_6(arg1), \T5
vpshufd $0b01001110, \XMM3, \T2
vpshufd $0b01001110, \T5, \T3
vpxor \XMM3, \T2, \T2
vpxor \T5, \T3, \T3
vpclmulqdq $0x11, \T5, \XMM3, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM3, \T4
vpxor \T4, \T7, \T7
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vmovdqa HashKey_5(arg1), \T5
vpshufd $0b01001110, \XMM4, \T2
vpshufd $0b01001110, \T5, \T3
vpxor \XMM4, \T2, \T2
vpxor \T5, \T3, \T3
vpclmulqdq $0x11, \T5, \XMM4, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM4, \T4
vpxor \T4, \T7, \T7
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vmovdqa HashKey_4(arg1), \T5
vpshufd $0b01001110, \XMM5, \T2
vpshufd $0b01001110, \T5, \T3
vpxor \XMM5, \T2, \T2
vpxor \T5, \T3, \T3
vpclmulqdq $0x11, \T5, \XMM5, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM5, \T4
vpxor \T4, \T7, \T7
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vmovdqa HashKey_3(arg1), \T5
vpshufd $0b01001110, \XMM6, \T2
vpshufd $0b01001110, \T5, \T3
vpxor \XMM6, \T2, \T2
vpxor \T5, \T3, \T3
vpclmulqdq $0x11, \T5, \XMM6, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM6, \T4
vpxor \T4, \T7, \T7
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vmovdqa HashKey_2(arg1), \T5
vpshufd $0b01001110, \XMM7, \T2
vpshufd $0b01001110, \T5, \T3
vpxor \XMM7, \T2, \T2
vpxor \T5, \T3, \T3
vpclmulqdq $0x11, \T5, \XMM7, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM7, \T4
vpxor \T4, \T7, \T7
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vmovdqa HashKey(arg1), \T5
vpshufd $0b01001110, \XMM8, \T2
vpshufd $0b01001110, \T5, \T3
vpxor \XMM8, \T2, \T2
vpxor \T5, \T3, \T3
vpclmulqdq $0x11, \T5, \XMM8, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM8, \T4
vpxor \T4, \T7, \T7
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
vpxor \T6, \XMM1, \XMM1
vpxor \T7, \XMM1, \T2
vpslldq $8, \T2, \T4
vpsrldq $8, \T2, \T2
vpxor \T4, \T7, \T7
vpxor \T2, \T6, \T6 # <T6:T7> holds the result of the
# accumulated carry-less multiplications
#######################################################################
#first phase of the reduction
vmovdqa POLY2(%rip), \T3
vpclmulqdq $0x01, \T7, \T3, \T2
vpslldq $8, \T2, \T2 # shift-L xmm2 2 DWs
vpxor \T2, \T7, \T7 # first phase of the reduction complete
#######################################################################
#second phase of the reduction
vpclmulqdq $0x00, \T7, \T3, \T2
vpsrldq $4, \T2, \T2 # shift-R T2 1 DW (Shift-R only 1-DW to obtain 2-DWs shift-R)
vpclmulqdq $0x10, \T7, \T3, \T4
vpslldq $4, \T4, \T4 # shift-L T4 1 DW (Shift-L 1-DW to obtain result with no shifts)
vpxor \T2, \T4, \T4 # second phase of the reduction complete
#######################################################################
vpxor \T4, \T6, \T6 # the result is in T6
.endm
# combined for GCM encrypt and decrypt functions
# clobbering all xmm registers
# clobbering r10, r11, r12, r13, r14, r15
.macro GCM_ENC_DEC_AVX2 ENC_DEC
#the number of pushes must equal STACK_OFFSET
push %r12
push %r13
push %r14
push %r15
mov %rsp, %r14
sub $VARIABLE_OFFSET, %rsp
and $~63, %rsp # align rsp to 64 bytes
vmovdqu HashKey(arg1), %xmm13 # xmm13 = HashKey
mov arg4, %r13 # save the number of bytes of plaintext/ciphertext
and $-16, %r13 # r13 = r13 - (r13 mod 16)
mov %r13, %r12
shr $4, %r12
and $7, %r12
jz _initial_num_blocks_is_0\@
cmp $7, %r12
je _initial_num_blocks_is_7\@
cmp $6, %r12
je _initial_num_blocks_is_6\@
cmp $5, %r12
je _initial_num_blocks_is_5\@
cmp $4, %r12
je _initial_num_blocks_is_4\@
cmp $3, %r12
je _initial_num_blocks_is_3\@
cmp $2, %r12
je _initial_num_blocks_is_2\@
jmp _initial_num_blocks_is_1\@
_initial_num_blocks_is_7\@:
INITIAL_BLOCKS_AVX2 7, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*7, %r13
jmp _initial_blocks_encrypted\@
_initial_num_blocks_is_6\@:
INITIAL_BLOCKS_AVX2 6, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*6, %r13
jmp _initial_blocks_encrypted\@
_initial_num_blocks_is_5\@:
INITIAL_BLOCKS_AVX2 5, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*5, %r13
jmp _initial_blocks_encrypted\@
_initial_num_blocks_is_4\@:
INITIAL_BLOCKS_AVX2 4, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*4, %r13
jmp _initial_blocks_encrypted\@
_initial_num_blocks_is_3\@:
INITIAL_BLOCKS_AVX2 3, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*3, %r13
jmp _initial_blocks_encrypted\@
_initial_num_blocks_is_2\@:
INITIAL_BLOCKS_AVX2 2, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*2, %r13
jmp _initial_blocks_encrypted\@
_initial_num_blocks_is_1\@:
INITIAL_BLOCKS_AVX2 1, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*1, %r13
jmp _initial_blocks_encrypted\@
_initial_num_blocks_is_0\@:
INITIAL_BLOCKS_AVX2 0, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
_initial_blocks_encrypted\@:
cmp $0, %r13
je _zero_cipher_left\@
sub $128, %r13
je _eight_cipher_left\@
vmovd %xmm9, %r15d
and $255, %r15d
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
_encrypt_by_8_new\@:
cmp $(255-8), %r15d
jg _encrypt_by_8\@
add $8, %r15b
GHASH_8_ENCRYPT_8_PARALLEL_AVX2 %xmm0, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm15, out_order, \ENC_DEC
add $128, %r11
sub $128, %r13
jne _encrypt_by_8_new\@
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
jmp _eight_cipher_left\@
_encrypt_by_8\@:
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
add $8, %r15b
GHASH_8_ENCRYPT_8_PARALLEL_AVX2 %xmm0, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm15, in_order, \ENC_DEC
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
add $128, %r11
sub $128, %r13
jne _encrypt_by_8_new\@
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
_eight_cipher_left\@:
GHASH_LAST_8_AVX2 %xmm0, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, %xmm15, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8
_zero_cipher_left\@:
cmp $16, arg4
jl _only_less_than_16\@
mov arg4, %r13
and $15, %r13 # r13 = (arg4 mod 16)
je _multiple_of_16_bytes\@
# handle the last <16 Byte block seperately
vpaddd ONE(%rip), %xmm9, %xmm9 # INCR CNT to get Yn
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
ENCRYPT_SINGLE_BLOCK %xmm9 # E(K, Yn)
sub $16, %r11
add %r13, %r11
vmovdqu (arg3, %r11), %xmm1 # receive the last <16 Byte block
lea SHIFT_MASK+16(%rip), %r12
sub %r13, %r12 # adjust the shuffle mask pointer
# to be able to shift 16-r13 bytes
# (r13 is the number of bytes in plaintext mod 16)
vmovdqu (%r12), %xmm2 # get the appropriate shuffle mask
vpshufb %xmm2, %xmm1, %xmm1 # shift right 16-r13 bytes
jmp _final_ghash_mul\@
_only_less_than_16\@:
# check for 0 length
mov arg4, %r13
and $15, %r13 # r13 = (arg4 mod 16)
je _multiple_of_16_bytes\@
# handle the last <16 Byte block seperately
vpaddd ONE(%rip), %xmm9, %xmm9 # INCR CNT to get Yn
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
ENCRYPT_SINGLE_BLOCK %xmm9 # E(K, Yn)
lea SHIFT_MASK+16(%rip), %r12
sub %r13, %r12 # adjust the shuffle mask pointer to be
# able to shift 16-r13 bytes (r13 is the
# number of bytes in plaintext mod 16)
_get_last_16_byte_loop\@:
movb (arg3, %r11), %al
movb %al, TMP1 (%rsp , %r11)
add $1, %r11
cmp %r13, %r11
jne _get_last_16_byte_loop\@
vmovdqu TMP1(%rsp), %xmm1
sub $16, %r11
_final_ghash_mul\@:
.if \ENC_DEC == DEC
vmovdqa %xmm1, %xmm2
vpxor %xmm1, %xmm9, %xmm9 # Plaintext XOR E(K, Yn)
vmovdqu ALL_F-SHIFT_MASK(%r12), %xmm1 # get the appropriate mask to mask out top 16-r13 bytes of xmm9
vpand %xmm1, %xmm9, %xmm9 # mask out top 16-r13 bytes of xmm9
vpand %xmm1, %xmm2, %xmm2
vpshufb SHUF_MASK(%rip), %xmm2, %xmm2
vpxor %xmm2, %xmm14, %xmm14
#GHASH computation for the last <16 Byte block
GHASH_MUL_AVX2 %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6
sub %r13, %r11
add $16, %r11
.else
vpxor %xmm1, %xmm9, %xmm9 # Plaintext XOR E(K, Yn)
vmovdqu ALL_F-SHIFT_MASK(%r12), %xmm1 # get the appropriate mask to mask out top 16-r13 bytes of xmm9
vpand %xmm1, %xmm9, %xmm9 # mask out top 16-r13 bytes of xmm9
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
vpxor %xmm9, %xmm14, %xmm14
#GHASH computation for the last <16 Byte block
GHASH_MUL_AVX2 %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6
sub %r13, %r11
add $16, %r11
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 # shuffle xmm9 back to output as ciphertext
.endif
#############################
# output r13 Bytes
vmovq %xmm9, %rax
cmp $8, %r13
jle _less_than_8_bytes_left\@
mov %rax, (arg2 , %r11)
add $8, %r11
vpsrldq $8, %xmm9, %xmm9
vmovq %xmm9, %rax
sub $8, %r13
_less_than_8_bytes_left\@:
movb %al, (arg2 , %r11)
add $1, %r11
shr $8, %rax
sub $1, %r13
jne _less_than_8_bytes_left\@
#############################
_multiple_of_16_bytes\@:
mov arg7, %r12 # r12 = aadLen (number of bytes)
shl $3, %r12 # convert into number of bits
vmovd %r12d, %xmm15 # len(A) in xmm15
shl $3, arg4 # len(C) in bits (*128)
vmovq arg4, %xmm1
vpslldq $8, %xmm15, %xmm15 # xmm15 = len(A)|| 0x0000000000000000
vpxor %xmm1, %xmm15, %xmm15 # xmm15 = len(A)||len(C)
vpxor %xmm15, %xmm14, %xmm14
GHASH_MUL_AVX2 %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6 # final GHASH computation
vpshufb SHUF_MASK(%rip), %xmm14, %xmm14 # perform a 16Byte swap
mov arg5, %rax # rax = *Y0
vmovdqu (%rax), %xmm9 # xmm9 = Y0
ENCRYPT_SINGLE_BLOCK %xmm9 # E(K, Y0)
vpxor %xmm14, %xmm9, %xmm9
_return_T\@:
mov arg8, %r10 # r10 = authTag
mov arg9, %r11 # r11 = auth_tag_len
cmp $16, %r11
je _T_16\@
cmp $12, %r11
je _T_12\@
_T_8\@:
vmovq %xmm9, %rax
mov %rax, (%r10)
jmp _return_T_done\@
_T_12\@:
vmovq %xmm9, %rax
mov %rax, (%r10)
vpsrldq $8, %xmm9, %xmm9
vmovd %xmm9, %eax
mov %eax, 8(%r10)
jmp _return_T_done\@
_T_16\@:
vmovdqu %xmm9, (%r10)
_return_T_done\@:
mov %r14, %rsp
pop %r15
pop %r14
pop %r13
pop %r12
.endm
#############################################################
#void aesni_gcm_precomp_avx_gen4
# (gcm_data *my_ctx_data,
# u8 *hash_subkey)# /* H, the Hash sub key input.
# Data starts on a 16-byte boundary. */
#############################################################
ENTRY(aesni_gcm_precomp_avx_gen4)
#the number of pushes must equal STACK_OFFSET
push %r12
push %r13
push %r14
push %r15
mov %rsp, %r14
sub $VARIABLE_OFFSET, %rsp
and $~63, %rsp # align rsp to 64 bytes
vmovdqu (arg2), %xmm6 # xmm6 = HashKey
vpshufb SHUF_MASK(%rip), %xmm6, %xmm6
############### PRECOMPUTATION of HashKey<<1 mod poly from the HashKey
vmovdqa %xmm6, %xmm2
vpsllq $1, %xmm6, %xmm6
vpsrlq $63, %xmm2, %xmm2
vmovdqa %xmm2, %xmm1
vpslldq $8, %xmm2, %xmm2
vpsrldq $8, %xmm1, %xmm1
vpor %xmm2, %xmm6, %xmm6
#reduction
vpshufd $0b00100100, %xmm1, %xmm2
vpcmpeqd TWOONE(%rip), %xmm2, %xmm2
vpand POLY(%rip), %xmm2, %xmm2
vpxor %xmm2, %xmm6, %xmm6 # xmm6 holds the HashKey<<1 mod poly
#######################################################################
vmovdqa %xmm6, HashKey(arg1) # store HashKey<<1 mod poly
PRECOMPUTE_AVX2 %xmm6, %xmm0, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5
mov %r14, %rsp
pop %r15
pop %r14
pop %r13
pop %r12
ret
ENDPROC(aesni_gcm_precomp_avx_gen4)
###############################################################################
#void aesni_gcm_enc_avx_gen4(
# gcm_data *my_ctx_data, /* aligned to 16 Bytes */
# u8 *out, /* Ciphertext output. Encrypt in-place is allowed. */
# const u8 *in, /* Plaintext input */
# u64 plaintext_len, /* Length of data in Bytes for encryption. */
# u8 *iv, /* Pre-counter block j0: 4 byte salt
# (from Security Association) concatenated with 8 byte
# Initialisation Vector (from IPSec ESP Payload)
# concatenated with 0x00000001. 16-byte aligned pointer. */
# const u8 *aad, /* Additional Authentication Data (AAD)*/
# u64 aad_len, /* Length of AAD in bytes. With RFC4106 this is going to be 8 or 12 Bytes */
# u8 *auth_tag, /* Authenticated Tag output. */
# u64 auth_tag_len)# /* Authenticated Tag Length in bytes.
# Valid values are 16 (most likely), 12 or 8. */
###############################################################################
ENTRY(aesni_gcm_enc_avx_gen4)
GCM_ENC_DEC_AVX2 ENC
ret
ENDPROC(aesni_gcm_enc_avx_gen4)
###############################################################################
#void aesni_gcm_dec_avx_gen4(
# gcm_data *my_ctx_data, /* aligned to 16 Bytes */
# u8 *out, /* Plaintext output. Decrypt in-place is allowed. */
# const u8 *in, /* Ciphertext input */
# u64 plaintext_len, /* Length of data in Bytes for encryption. */
# u8 *iv, /* Pre-counter block j0: 4 byte salt
# (from Security Association) concatenated with 8 byte
# Initialisation Vector (from IPSec ESP Payload)
# concatenated with 0x00000001. 16-byte aligned pointer. */
# const u8 *aad, /* Additional Authentication Data (AAD)*/
# u64 aad_len, /* Length of AAD in bytes. With RFC4106 this is going to be 8 or 12 Bytes */
# u8 *auth_tag, /* Authenticated Tag output. */
# u64 auth_tag_len)# /* Authenticated Tag Length in bytes.
# Valid values are 16 (most likely), 12 or 8. */
###############################################################################
ENTRY(aesni_gcm_dec_avx_gen4)
GCM_ENC_DEC_AVX2 DEC
ret
ENDPROC(aesni_gcm_dec_avx_gen4)
#endif /* CONFIG_AS_AVX2 */
