########################################################################
# 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>

# constants in mergeable sections, linker can reorder and merge
.section	.rodata.cst16.POLY, "aM", @progbits, 16
.align 16
POLY:            .octa     0xC2000000000000000000000000000001

.section	.rodata.cst16.POLY2, "aM", @progbits, 16
.align 16
POLY2:           .octa     0xC20000000000000000000001C2000000

.section	.rodata.cst16.TWOONE, "aM", @progbits, 16
.align 16
TWOONE:          .octa     0x00000001000000000000000000000001

.section	.rodata.cst16.SHUF_MASK, "aM", @progbits, 16
.align 16
SHUF_MASK:       .octa     0x000102030405060708090A0B0C0D0E0F

.section	.rodata.cst16.ONE, "aM", @progbits, 16
.align 16
ONE:             .octa     0x00000000000000000000000000000001

.section	.rodata.cst16.ONEf, "aM", @progbits, 16
.align 16
ONEf:            .octa     0x01000000000000000000000000000000

# order of these constants should not change.
# more specifically, ALL_F should follow SHIFT_MASK, and zero should follow ALL_F
.section	.rodata, "a", @progbits
.align 16
SHIFT_MASK:      .octa     0x0f0e0d0c0b0a09080706050403020100
ALL_F:           .octa     0xffffffffffffffffffffffffffffffff
                 .octa     0x00000000000000000000000000000000

.section .rodata
.align 16
.type aad_shift_arr, @object
.size aad_shift_arr, 272
aad_shift_arr:
        .octa     0xffffffffffffffffffffffffffffffff
        .octa     0xffffffffffffffffffffffffffffff0C
        .octa     0xffffffffffffffffffffffffffff0D0C
        .octa     0xffffffffffffffffffffffffff0E0D0C
        .octa     0xffffffffffffffffffffffff0F0E0D0C
        .octa     0xffffffffffffffffffffff0C0B0A0908
        .octa     0xffffffffffffffffffff0D0C0B0A0908
        .octa     0xffffffffffffffffff0E0D0C0B0A0908
        .octa     0xffffffffffffffff0F0E0D0C0B0A0908
        .octa     0xffffffffffffff0C0B0A090807060504
        .octa     0xffffffffffff0D0C0B0A090807060504
        .octa     0xffffffffff0E0D0C0B0A090807060504
        .octa     0xffffffff0F0E0D0C0B0A090807060504
        .octa     0xffffff0C0B0A09080706050403020100
        .octa     0xffff0D0C0B0A09080706050403020100
        .octa     0xff0E0D0C0B0A09080706050403020100
        .octa     0x0F0E0D0C0B0A09080706050403020100


.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)
	j = 0
	setreg

	mov     arg6, %r10                      # r10 = AAD
	mov     arg7, %r12                      # r12 = aadLen


	mov     %r12, %r11

	vpxor   reg_j, reg_j, reg_j
	vpxor   reg_i, reg_i, reg_i
	cmp     $16, %r11
	jl      _get_AAD_rest8\@
_get_AAD_blocks\@:
	vmovdqu (%r10), reg_i
	vpshufb SHUF_MASK(%rip), reg_i, reg_i
	vpxor   reg_i, reg_j, reg_j
	GHASH_MUL_AVX       reg_j, \T2, \T1, \T3, \T4, \T5, \T6
	add     $16, %r10
	sub     $16, %r12
	sub     $16, %r11
	cmp     $16, %r11
	jge     _get_AAD_blocks\@
	vmovdqu reg_j, reg_i
	cmp     $0, %r11
	je      _get_AAD_done\@

	vpxor   reg_i, reg_i, reg_i

	/* read the last <16B of AAD. since we have at least 4B of
	data right after the AAD (the ICV, and maybe some CT), we can
	read 4B/8B blocks safely, and then get rid of the extra stuff */
_get_AAD_rest8\@:
	cmp     $4, %r11
	jle     _get_AAD_rest4\@
	movq    (%r10), \T1
	add     $8, %r10
	sub     $8, %r11
	vpslldq $8, \T1, \T1
	vpsrldq $8, reg_i, reg_i
	vpxor   \T1, reg_i, reg_i
	jmp     _get_AAD_rest8\@
_get_AAD_rest4\@:
	cmp     $0, %r11
	jle      _get_AAD_rest0\@
	mov     (%r10), %eax
	movq    %rax, \T1
	add     $4, %r10
	sub     $4, %r11
	vpslldq $12, \T1, \T1
	vpsrldq $4, reg_i, reg_i
	vpxor   \T1, reg_i, reg_i
_get_AAD_rest0\@:
	/* finalize: shift out the extra bytes we read, and align
	left. since pslldq can only shift by an immediate, we use
	vpshufb and an array of shuffle masks */
	movq    %r12, %r11
	salq    $4, %r11
	movdqu  aad_shift_arr(%r11), \T1
	vpshufb \T1, reg_i, reg_i
_get_AAD_rest_final\@:
	vpshufb SHUF_MASK(%rip), reg_i, reg_i
	vpxor   reg_j, reg_i, reg_i
	GHASH_MUL_AVX       reg_i, \T2, \T1, \T3, \T4, \T5, \T6

_get_AAD_done\@:
	# 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

.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     $8, %r11
        jl      _T_4\@

_T_8\@:
        vmovq   %xmm9, %rax
        mov     %rax, (%r10)
        add     $8, %r10
        sub     $8, %r11
        vpsrldq $8, %xmm9, %xmm9
        cmp     $0, %r11
        je     _return_T_done\@
_T_4\@:
        vmovd   %xmm9, %eax
        mov     %eax, (%r10)
        add     $4, %r10
        sub     $4, %r11
        vpsrldq     $4, %xmm9, %xmm9
        cmp     $0, %r11
        je     _return_T_done\@
_T_123\@:
        vmovd     %xmm9, %eax
        cmp     $2, %r11
        jl     _T_1\@
        mov     %ax, (%r10)
        cmp     $2, %r11
        je     _return_T_done\@
        add     $2, %r10
        sar     $16, %eax
_T_1\@:
        mov     %al, (%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)
	j = 0
	setreg

	mov     arg6, %r10                       # r10 = AAD
	mov     arg7, %r12                       # r12 = aadLen


	mov     %r12, %r11

	vpxor   reg_j, reg_j, reg_j
	vpxor   reg_i, reg_i, reg_i

	cmp     $16, %r11
	jl      _get_AAD_rest8\@
_get_AAD_blocks\@:
	vmovdqu (%r10), reg_i
	vpshufb SHUF_MASK(%rip), reg_i, reg_i
	vpxor   reg_i, reg_j, reg_j
	GHASH_MUL_AVX2      reg_j, \T2, \T1, \T3, \T4, \T5, \T6
	add     $16, %r10
	sub     $16, %r12
	sub     $16, %r11
	cmp     $16, %r11
	jge     _get_AAD_blocks\@
	vmovdqu reg_j, reg_i
	cmp     $0, %r11
	je      _get_AAD_done\@

	vpxor   reg_i, reg_i, reg_i

	/* read the last <16B of AAD. since we have at least 4B of
	data right after the AAD (the ICV, and maybe some CT), we can
	read 4B/8B blocks safely, and then get rid of the extra stuff */
_get_AAD_rest8\@:
	cmp     $4, %r11
	jle     _get_AAD_rest4\@
	movq    (%r10), \T1
	add     $8, %r10
	sub     $8, %r11
	vpslldq $8, \T1, \T1
	vpsrldq $8, reg_i, reg_i
	vpxor   \T1, reg_i, reg_i
	jmp     _get_AAD_rest8\@
_get_AAD_rest4\@:
	cmp     $0, %r11
	jle     _get_AAD_rest0\@
	mov     (%r10), %eax
	movq    %rax, \T1
	add     $4, %r10
	sub     $4, %r11
	vpslldq $12, \T1, \T1
	vpsrldq $4, reg_i, reg_i
	vpxor   \T1, reg_i, reg_i
_get_AAD_rest0\@:
	/* finalize: shift out the extra bytes we read, and align
	left. since pslldq can only shift by an immediate, we use
	vpshufb and an array of shuffle masks */
	movq    %r12, %r11
	salq    $4, %r11
	movdqu  aad_shift_arr(%r11), \T1
	vpshufb \T1, reg_i, reg_i
_get_AAD_rest_final\@:
	vpshufb SHUF_MASK(%rip), reg_i, reg_i
	vpxor   reg_j, reg_i, reg_i
	GHASH_MUL_AVX2      reg_i, \T2, \T1, \T3, \T4, \T5, \T6

_get_AAD_done\@:
	# 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

.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     $8, %r11
        jl      _T_4\@

_T_8\@:
        vmovq   %xmm9, %rax
        mov     %rax, (%r10)
        add     $8, %r10
        sub     $8, %r11
        vpsrldq $8, %xmm9, %xmm9
        cmp     $0, %r11
        je     _return_T_done\@
_T_4\@:
        vmovd   %xmm9, %eax
        mov     %eax, (%r10)
        add     $4, %r10
        sub     $4, %r11
        vpsrldq     $4, %xmm9, %xmm9
        cmp     $0, %r11
        je     _return_T_done\@
_T_123\@:
        vmovd     %xmm9, %eax
        cmp     $2, %r11
        jl     _T_1\@
        mov     %ax, (%r10)
        cmp     $2, %r11
        je     _return_T_done\@
        add     $2, %r10
        sar     $16, %eax
_T_1\@:
        mov     %al, (%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 */