########################################################################
# Implement fast SHA-512 with AVX2 instructions. (x86_64)
#
# Copyright (C) 2013 Intel Corporation.
#
# Authors:
#     James Guilford <james.guilford@intel.com>
#     Kirk Yap <kirk.s.yap@intel.com>
#     David Cote <david.m.cote@intel.com>
#     Tim Chen <tim.c.chen@linux.intel.com>
#
# This software is available to you under a choice of one of two
# licenses.  You may choose to be licensed under the terms of the GNU
# General Public License (GPL) Version 2, available from the file
# COPYING in the main directory of this source tree, or the
# OpenIB.org BSD license below:
#
#     Redistribution and use in source and binary forms, with or
#     without modification, are permitted provided that the following
#     conditions are met:
#
#      - Redistributions of source code must retain the above
#        copyright notice, this list of conditions and the following
#        disclaimer.
#
#      - Redistributions in binary form must reproduce the above
#        copyright notice, this list of conditions and the following
#        disclaimer in the documentation and/or other materials
#        provided with the distribution.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
#
########################################################################
#
# This code is described in an Intel White-Paper:
# "Fast SHA-512 Implementations on Intel Architecture Processors"
#
# To find it, surf to http://www.intel.com/p/en_US/embedded
# and search for that title.
#
########################################################################
# This code schedules 1 blocks at a time, with 4 lanes per block
########################################################################

#include <linux/linkage.h>

.text

# Virtual Registers
Y_0 = %ymm4
Y_1 = %ymm5
Y_2 = %ymm6
Y_3 = %ymm7

YTMP0 = %ymm0
YTMP1 = %ymm1
YTMP2 = %ymm2
YTMP3 = %ymm3
YTMP4 = %ymm8
XFER  = YTMP0

BYTE_FLIP_MASK  = %ymm9

# 1st arg is %rdi, which is saved to the stack and accessed later via %r12
CTX1        = %rdi
CTX2        = %r12
# 2nd arg
INP         = %rsi
# 3rd arg
NUM_BLKS    = %rdx

c           = %rcx
d           = %r8
e           = %rdx
y3          = %rsi

TBL   = %rdi # clobbers CTX1

a     = %rax
b     = %rbx

f     = %r9
g     = %r10
h     = %r11
old_h = %r11

T1    = %r12 # clobbers CTX2
y0    = %r13
y1    = %r14
y2    = %r15

# Local variables (stack frame)
XFER_SIZE = 4*8
SRND_SIZE = 1*8
INP_SIZE = 1*8
INPEND_SIZE = 1*8
CTX_SIZE = 1*8

frame_XFER = 0
frame_SRND = frame_XFER + XFER_SIZE
frame_INP = frame_SRND + SRND_SIZE
frame_INPEND = frame_INP + INP_SIZE
frame_CTX = frame_INPEND + INPEND_SIZE
frame_size = frame_CTX + CTX_SIZE

## assume buffers not aligned
#define VMOVDQ vmovdqu

# addm [mem], reg
# Add reg to mem using reg-mem add and store
.macro addm p1 p2
        add     \p1, \p2
        mov     \p2, \p1
.endm


# COPY_YMM_AND_BSWAP ymm, [mem], byte_flip_mask
# Load ymm with mem and byte swap each dword
.macro COPY_YMM_AND_BSWAP p1 p2 p3
        VMOVDQ \p2, \p1
        vpshufb \p3, \p1, \p1
.endm
# rotate_Ys
# Rotate values of symbols Y0...Y3
.macro rotate_Ys
        Y_ = Y_0
        Y_0 = Y_1
        Y_1 = Y_2
        Y_2 = Y_3
        Y_3 = Y_
.endm

# RotateState
.macro RotateState
        # Rotate symbols a..h right
        old_h  = h
        TMP_   = h
        h      = g
        g      = f
        f      = e
        e      = d
        d      = c
        c      = b
        b      = a
        a      = TMP_
.endm

# macro MY_VPALIGNR     YDST, YSRC1, YSRC2, RVAL
# YDST = {YSRC1, YSRC2} >> RVAL*8
.macro MY_VPALIGNR YDST YSRC1 YSRC2 RVAL
        vperm2f128      $0x3, \YSRC2, \YSRC1, \YDST     # YDST = {YS1_LO, YS2_HI}
        vpalignr        $\RVAL, \YSRC2, \YDST, \YDST    # YDST = {YDS1, YS2} >> RVAL*8
.endm

.macro FOUR_ROUNDS_AND_SCHED
################################### RND N + 0 #########################################

        # Extract w[t-7]
        MY_VPALIGNR     YTMP0, Y_3, Y_2, 8              # YTMP0 = W[-7]
        # Calculate w[t-16] + w[t-7]
        vpaddq          Y_0, YTMP0, YTMP0               # YTMP0 = W[-7] + W[-16]
        # Extract w[t-15]
        MY_VPALIGNR     YTMP1, Y_1, Y_0, 8              # YTMP1 = W[-15]

        # Calculate sigma0

        # Calculate w[t-15] ror 1
        vpsrlq          $1, YTMP1, YTMP2
        vpsllq          $(64-1), YTMP1, YTMP3
        vpor            YTMP2, YTMP3, YTMP3             # YTMP3 = W[-15] ror 1
        # Calculate w[t-15] shr 7
        vpsrlq          $7, YTMP1, YTMP4                # YTMP4 = W[-15] >> 7

        mov     a, y3           # y3 = a                                # MAJA
        rorx    $41, e, y0      # y0 = e >> 41                          # S1A
        rorx    $18, e, y1      # y1 = e >> 18                          # S1B
        add     frame_XFER(%rsp),h              # h = k + w + h         # --
        or      c, y3           # y3 = a|c                              # MAJA
        mov     f, y2           # y2 = f                                # CH
        rorx    $34, a, T1      # T1 = a >> 34                          # S0B

        xor     y1, y0          # y0 = (e>>41) ^ (e>>18)                # S1
        xor     g, y2           # y2 = f^g                              # CH
        rorx    $14, e, y1      # y1 = (e >> 14)                        # S1

        and     e, y2           # y2 = (f^g)&e                          # CH
        xor     y1, y0          # y0 = (e>>41) ^ (e>>18) ^ (e>>14)      # S1
        rorx    $39, a, y1      # y1 = a >> 39                          # S0A
        add     h, d            # d = k + w + h + d                     # --

        and     b, y3           # y3 = (a|c)&b                          # MAJA
        xor     T1, y1          # y1 = (a>>39) ^ (a>>34)                # S0
        rorx    $28, a, T1      # T1 = (a >> 28)                        # S0

        xor     g, y2           # y2 = CH = ((f^g)&e)^g                 # CH
        xor     T1, y1          # y1 = (a>>39) ^ (a>>34) ^ (a>>28)      # S0
        mov     a, T1           # T1 = a                                # MAJB
        and     c, T1           # T1 = a&c                              # MAJB

        add     y0, y2          # y2 = S1 + CH                          # --
        or      T1, y3          # y3 = MAJ = (a|c)&b)|(a&c)             # MAJ
        add     y1, h           # h = k + w + h + S0                    # --

        add     y2, d           # d = k + w + h + d + S1 + CH = d + t1  # --

        add     y2, h           # h = k + w + h + S0 + S1 + CH = t1 + S0# --
        add     y3, h           # h = t1 + S0 + MAJ                     # --

        RotateState

################################### RND N + 1 #########################################

        # Calculate w[t-15] ror 8
        vpsrlq          $8, YTMP1, YTMP2
        vpsllq          $(64-8), YTMP1, YTMP1
        vpor            YTMP2, YTMP1, YTMP1             # YTMP1 = W[-15] ror 8
        # XOR the three components
        vpxor           YTMP4, YTMP3, YTMP3             # YTMP3 = W[-15] ror 1 ^ W[-15] >> 7
        vpxor           YTMP1, YTMP3, YTMP1             # YTMP1 = s0


        # Add three components, w[t-16], w[t-7] and sigma0
        vpaddq          YTMP1, YTMP0, YTMP0             # YTMP0 = W[-16] + W[-7] + s0
        # Move to appropriate lanes for calculating w[16] and w[17]
        vperm2f128      $0x0, YTMP0, YTMP0, Y_0         # Y_0 = W[-16] + W[-7] + s0 {BABA}
        # Move to appropriate lanes for calculating w[18] and w[19]
        vpand           MASK_YMM_LO(%rip), YTMP0, YTMP0 # YTMP0 = W[-16] + W[-7] + s0 {DC00}

        # Calculate w[16] and w[17] in both 128 bit lanes

        # Calculate sigma1 for w[16] and w[17] on both 128 bit lanes
        vperm2f128      $0x11, Y_3, Y_3, YTMP2          # YTMP2 = W[-2] {BABA}
        vpsrlq          $6, YTMP2, YTMP4                # YTMP4 = W[-2] >> 6 {BABA}


        mov     a, y3           # y3 = a                                # MAJA
        rorx    $41, e, y0      # y0 = e >> 41                          # S1A
        rorx    $18, e, y1      # y1 = e >> 18                          # S1B
        add     1*8+frame_XFER(%rsp), h         # h = k + w + h         # --
        or      c, y3           # y3 = a|c                              # MAJA


        mov     f, y2           # y2 = f                                # CH
        rorx    $34, a, T1      # T1 = a >> 34                          # S0B
        xor     y1, y0          # y0 = (e>>41) ^ (e>>18)                # S1
        xor     g, y2           # y2 = f^g                              # CH


        rorx    $14, e, y1      # y1 = (e >> 14)                        # S1
        xor     y1, y0          # y0 = (e>>41) ^ (e>>18) ^ (e>>14)      # S1
        rorx    $39, a, y1      # y1 = a >> 39                          # S0A
        and     e, y2           # y2 = (f^g)&e                          # CH
        add     h, d            # d = k + w + h + d                     # --

        and     b, y3           # y3 = (a|c)&b                          # MAJA
        xor     T1, y1          # y1 = (a>>39) ^ (a>>34)                # S0

        rorx    $28, a, T1      # T1 = (a >> 28)                        # S0
        xor     g, y2           # y2 = CH = ((f^g)&e)^g                 # CH

        xor     T1, y1          # y1 = (a>>39) ^ (a>>34) ^ (a>>28)      # S0
        mov     a, T1           # T1 = a                                # MAJB
        and     c, T1           # T1 = a&c                              # MAJB
        add     y0, y2          # y2 = S1 + CH                          # --

        or      T1, y3          # y3 = MAJ = (a|c)&b)|(a&c)             # MAJ
        add     y1, h           # h = k + w + h + S0                    # --

        add     y2, d           # d = k + w + h + d + S1 + CH = d + t1  # --
        add     y2, h           # h = k + w + h + S0 + S1 + CH = t1 + S0# --
        add     y3, h           # h = t1 + S0 + MAJ                     # --

        RotateState


################################### RND N + 2 #########################################

        vpsrlq          $19, YTMP2, YTMP3               # YTMP3 = W[-2] >> 19 {BABA}
        vpsllq          $(64-19), YTMP2, YTMP1          # YTMP1 = W[-2] << 19 {BABA}
        vpor            YTMP1, YTMP3, YTMP3             # YTMP3 = W[-2] ror 19 {BABA}
        vpxor           YTMP3, YTMP4, YTMP4             # YTMP4 = W[-2] ror 19 ^ W[-2] >> 6 {BABA}
        vpsrlq          $61, YTMP2, YTMP3               # YTMP3 = W[-2] >> 61 {BABA}
        vpsllq          $(64-61), YTMP2, YTMP1          # YTMP1 = W[-2] << 61 {BABA}
        vpor            YTMP1, YTMP3, YTMP3             # YTMP3 = W[-2] ror 61 {BABA}
        vpxor           YTMP3, YTMP4, YTMP4             # YTMP4 = s1 = (W[-2] ror 19) ^
                                                        #  (W[-2] ror 61) ^ (W[-2] >> 6) {BABA}

        # Add sigma1 to the other compunents to get w[16] and w[17]
        vpaddq          YTMP4, Y_0, Y_0                 # Y_0 = {W[1], W[0], W[1], W[0]}

        # Calculate sigma1 for w[18] and w[19] for upper 128 bit lane
        vpsrlq          $6, Y_0, YTMP4                  # YTMP4 = W[-2] >> 6 {DC--}

        mov     a, y3           # y3 = a                                # MAJA
        rorx    $41, e, y0      # y0 = e >> 41                          # S1A
        add     2*8+frame_XFER(%rsp), h         # h = k + w + h         # --

        rorx    $18, e, y1      # y1 = e >> 18                          # S1B
        or      c, y3           # y3 = a|c                              # MAJA
        mov     f, y2           # y2 = f                                # CH
        xor     g, y2           # y2 = f^g                              # CH

        rorx    $34, a, T1      # T1 = a >> 34                          # S0B
        xor     y1, y0          # y0 = (e>>41) ^ (e>>18)                # S1
        and     e, y2           # y2 = (f^g)&e                          # CH

        rorx    $14, e, y1      # y1 = (e >> 14)                        # S1
        add     h, d            # d = k + w + h + d                     # --
        and     b, y3           # y3 = (a|c)&b                          # MAJA

        xor     y1, y0          # y0 = (e>>41) ^ (e>>18) ^ (e>>14)      # S1
        rorx    $39, a, y1      # y1 = a >> 39                          # S0A
        xor     g, y2           # y2 = CH = ((f^g)&e)^g                 # CH

        xor     T1, y1          # y1 = (a>>39) ^ (a>>34)                # S0
        rorx    $28, a, T1      # T1 = (a >> 28)                        # S0

        xor     T1, y1          # y1 = (a>>39) ^ (a>>34) ^ (a>>28)      # S0
        mov     a, T1           # T1 = a                                # MAJB
        and     c, T1           # T1 = a&c                              # MAJB
        add     y0, y2          # y2 = S1 + CH                          # --

        or      T1, y3          # y3 = MAJ = (a|c)&b)|(a&c)             # MAJ
        add     y1, h           # h = k + w + h + S0                    # --
        add     y2, d           # d = k + w + h + d + S1 + CH = d + t1  # --
        add     y2, h           # h = k + w + h + S0 + S1 + CH = t1 + S0# --

        add     y3, h           # h = t1 + S0 + MAJ                     # --

        RotateState

################################### RND N + 3 #########################################

        vpsrlq          $19, Y_0, YTMP3                 # YTMP3 = W[-2] >> 19 {DC--}
        vpsllq          $(64-19), Y_0, YTMP1            # YTMP1 = W[-2] << 19 {DC--}
        vpor            YTMP1, YTMP3, YTMP3             # YTMP3 = W[-2] ror 19 {DC--}
        vpxor           YTMP3, YTMP4, YTMP4             # YTMP4 = W[-2] ror 19 ^ W[-2] >> 6 {DC--}
        vpsrlq          $61, Y_0, YTMP3                 # YTMP3 = W[-2] >> 61 {DC--}
        vpsllq          $(64-61), Y_0, YTMP1            # YTMP1 = W[-2] << 61 {DC--}
        vpor            YTMP1, YTMP3, YTMP3             # YTMP3 = W[-2] ror 61 {DC--}
        vpxor           YTMP3, YTMP4, YTMP4             # YTMP4 = s1 = (W[-2] ror 19) ^
                                                        #  (W[-2] ror 61) ^ (W[-2] >> 6) {DC--}

        # Add the sigma0 + w[t-7] + w[t-16] for w[18] and w[19]
        # to newly calculated sigma1 to get w[18] and w[19]
        vpaddq          YTMP4, YTMP0, YTMP2             # YTMP2 = {W[3], W[2], --, --}

        # Form w[19, w[18], w17], w[16]
        vpblendd                $0xF0, YTMP2, Y_0, Y_0          # Y_0 = {W[3], W[2], W[1], W[0]}

        mov     a, y3           # y3 = a                                # MAJA
        rorx    $41, e, y0      # y0 = e >> 41                          # S1A
        rorx    $18, e, y1      # y1 = e >> 18                          # S1B
        add     3*8+frame_XFER(%rsp), h         # h = k + w + h         # --
        or      c, y3           # y3 = a|c                              # MAJA


        mov     f, y2           # y2 = f                                # CH
        rorx    $34, a, T1      # T1 = a >> 34                          # S0B
        xor     y1, y0          # y0 = (e>>41) ^ (e>>18)                # S1
        xor     g, y2           # y2 = f^g                              # CH


        rorx    $14, e, y1      # y1 = (e >> 14)                        # S1
        and     e, y2           # y2 = (f^g)&e                          # CH
        add     h, d            # d = k + w + h + d                     # --
        and     b, y3           # y3 = (a|c)&b                          # MAJA

        xor     y1, y0          # y0 = (e>>41) ^ (e>>18) ^ (e>>14)      # S1
        xor     g, y2           # y2 = CH = ((f^g)&e)^g                 # CH

        rorx    $39, a, y1      # y1 = a >> 39                          # S0A
        add     y0, y2          # y2 = S1 + CH                          # --

        xor     T1, y1          # y1 = (a>>39) ^ (a>>34)                # S0
        add     y2, d           # d = k + w + h + d + S1 + CH = d + t1  # --

        rorx    $28, a, T1      # T1 = (a >> 28)                        # S0

        xor     T1, y1          # y1 = (a>>39) ^ (a>>34) ^ (a>>28)      # S0
        mov     a, T1           # T1 = a                                # MAJB
        and     c, T1           # T1 = a&c                              # MAJB
        or      T1, y3          # y3 = MAJ = (a|c)&b)|(a&c)             # MAJ

        add     y1, h           # h = k + w + h + S0                    # --
        add     y2, h           # h = k + w + h + S0 + S1 + CH = t1 + S0# --
        add     y3, h           # h = t1 + S0 + MAJ                     # --

        RotateState

        rotate_Ys
.endm

.macro DO_4ROUNDS

################################### RND N + 0 #########################################

        mov     f, y2           # y2 = f                                # CH
        rorx    $41, e, y0      # y0 = e >> 41                          # S1A
        rorx    $18, e, y1      # y1 = e >> 18                          # S1B
        xor     g, y2           # y2 = f^g                              # CH

        xor     y1, y0          # y0 = (e>>41) ^ (e>>18)                # S1
        rorx    $14, e, y1      # y1 = (e >> 14)                        # S1
        and     e, y2           # y2 = (f^g)&e                          # CH

        xor     y1, y0          # y0 = (e>>41) ^ (e>>18) ^ (e>>14)      # S1
        rorx    $34, a, T1      # T1 = a >> 34                          # S0B
        xor     g, y2           # y2 = CH = ((f^g)&e)^g                 # CH
        rorx    $39, a, y1      # y1 = a >> 39                          # S0A
        mov     a, y3           # y3 = a                                # MAJA

        xor     T1, y1          # y1 = (a>>39) ^ (a>>34)                # S0
        rorx    $28, a, T1      # T1 = (a >> 28)                        # S0
        add     frame_XFER(%rsp), h             # h = k + w + h         # --
        or      c, y3           # y3 = a|c                              # MAJA

        xor     T1, y1          # y1 = (a>>39) ^ (a>>34) ^ (a>>28)      # S0
        mov     a, T1           # T1 = a                                # MAJB
        and     b, y3           # y3 = (a|c)&b                          # MAJA
        and     c, T1           # T1 = a&c                              # MAJB
        add     y0, y2          # y2 = S1 + CH                          # --

        add     h, d            # d = k + w + h + d                     # --
        or      T1, y3          # y3 = MAJ = (a|c)&b)|(a&c)             # MAJ
        add     y1, h           # h = k + w + h + S0                    # --

        add     y2, d           # d = k + w + h + d + S1 + CH = d + t1  # --

        RotateState

################################### RND N + 1 #########################################

        add     y2, old_h       # h = k + w + h + S0 + S1 + CH = t1 + S0# --
        mov     f, y2           # y2 = f                                # CH
        rorx    $41, e, y0      # y0 = e >> 41                          # S1A
        rorx    $18, e, y1      # y1 = e >> 18                          # S1B
        xor     g, y2           # y2 = f^g                              # CH

        xor     y1, y0          # y0 = (e>>41) ^ (e>>18)                # S1
        rorx    $14, e, y1      # y1 = (e >> 14)                        # S1
        and     e, y2           # y2 = (f^g)&e                          # CH
        add     y3, old_h       # h = t1 + S0 + MAJ                     # --

        xor     y1, y0          # y0 = (e>>41) ^ (e>>18) ^ (e>>14)      # S1
        rorx    $34, a, T1      # T1 = a >> 34                          # S0B
        xor     g, y2           # y2 = CH = ((f^g)&e)^g                 # CH
        rorx    $39, a, y1      # y1 = a >> 39                          # S0A
        mov     a, y3           # y3 = a                                # MAJA

        xor     T1, y1          # y1 = (a>>39) ^ (a>>34)                # S0
        rorx    $28, a, T1      # T1 = (a >> 28)                        # S0
        add     8*1+frame_XFER(%rsp), h         # h = k + w + h         # --
        or      c, y3           # y3 = a|c                              # MAJA

        xor     T1, y1          # y1 = (a>>39) ^ (a>>34) ^ (a>>28)      # S0
        mov     a, T1           # T1 = a                                # MAJB
        and     b, y3           # y3 = (a|c)&b                          # MAJA
        and     c, T1           # T1 = a&c                              # MAJB
        add     y0, y2          # y2 = S1 + CH                          # --

        add     h, d            # d = k + w + h + d                     # --
        or      T1, y3          # y3 = MAJ = (a|c)&b)|(a&c)             # MAJ
        add     y1, h           # h = k + w + h + S0                    # --

        add     y2, d           # d = k + w + h + d + S1 + CH = d + t1  # --

        RotateState

################################### RND N + 2 #########################################

        add     y2, old_h       # h = k + w + h + S0 + S1 + CH = t1 + S0# --
        mov     f, y2           # y2 = f                                # CH
        rorx    $41, e, y0      # y0 = e >> 41                          # S1A
        rorx    $18, e, y1      # y1 = e >> 18                          # S1B
        xor     g, y2           # y2 = f^g                              # CH

        xor     y1, y0          # y0 = (e>>41) ^ (e>>18)                # S1
        rorx    $14, e, y1      # y1 = (e >> 14)                        # S1
        and     e, y2           # y2 = (f^g)&e                          # CH
        add     y3, old_h       # h = t1 + S0 + MAJ                     # --

        xor     y1, y0          # y0 = (e>>41) ^ (e>>18) ^ (e>>14)      # S1
        rorx    $34, a, T1      # T1 = a >> 34                          # S0B
        xor     g, y2           # y2 = CH = ((f^g)&e)^g                 # CH
        rorx    $39, a, y1      # y1 = a >> 39                          # S0A
        mov     a, y3           # y3 = a                                # MAJA

        xor     T1, y1          # y1 = (a>>39) ^ (a>>34)                # S0
        rorx    $28, a, T1      # T1 = (a >> 28)                        # S0
        add     8*2+frame_XFER(%rsp), h         # h = k + w + h         # --
        or      c, y3           # y3 = a|c                              # MAJA

        xor     T1, y1          # y1 = (a>>39) ^ (a>>34) ^ (a>>28)      # S0
        mov     a, T1           # T1 = a                                # MAJB
        and     b, y3           # y3 = (a|c)&b                          # MAJA
        and     c, T1           # T1 = a&c                              # MAJB
        add     y0, y2          # y2 = S1 + CH                          # --

        add     h, d            # d = k + w + h + d                     # --
        or      T1, y3          # y3 = MAJ = (a|c)&b)|(a&c)             # MAJ
        add     y1, h           # h = k + w + h + S0                    # --

        add     y2, d           # d = k + w + h + d + S1 + CH = d + t1  # --

        RotateState

################################### RND N + 3 #########################################

        add     y2, old_h       # h = k + w + h + S0 + S1 + CH = t1 + S0# --
        mov     f, y2           # y2 = f                                # CH
        rorx    $41, e, y0      # y0 = e >> 41                          # S1A
        rorx    $18, e, y1      # y1 = e >> 18                          # S1B
        xor     g, y2           # y2 = f^g                              # CH

        xor     y1, y0          # y0 = (e>>41) ^ (e>>18)                # S1
        rorx    $14, e, y1      # y1 = (e >> 14)                        # S1
        and     e, y2           # y2 = (f^g)&e                          # CH
        add     y3, old_h       # h = t1 + S0 + MAJ                     # --

        xor     y1, y0          # y0 = (e>>41) ^ (e>>18) ^ (e>>14)      # S1
        rorx    $34, a, T1      # T1 = a >> 34                          # S0B
        xor     g, y2           # y2 = CH = ((f^g)&e)^g                 # CH
        rorx    $39, a, y1      # y1 = a >> 39                          # S0A
        mov     a, y3           # y3 = a                                # MAJA

        xor     T1, y1          # y1 = (a>>39) ^ (a>>34)                # S0
        rorx    $28, a, T1      # T1 = (a >> 28)                        # S0
        add     8*3+frame_XFER(%rsp), h         # h = k + w + h         # --
        or      c, y3           # y3 = a|c                              # MAJA

        xor     T1, y1          # y1 = (a>>39) ^ (a>>34) ^ (a>>28)      # S0
        mov     a, T1           # T1 = a                                # MAJB
        and     b, y3           # y3 = (a|c)&b                          # MAJA
        and     c, T1           # T1 = a&c                              # MAJB
        add     y0, y2          # y2 = S1 + CH                          # --


        add     h, d            # d = k + w + h + d                     # --
        or      T1, y3          # y3 = MAJ = (a|c)&b)|(a&c)             # MAJ
        add     y1, h           # h = k + w + h + S0                    # --

        add     y2, d           # d = k + w + h + d + S1 + CH = d + t1  # --

        add     y2, h           # h = k + w + h + S0 + S1 + CH = t1 + S0# --

        add     y3, h           # h = t1 + S0 + MAJ                     # --

        RotateState

.endm

########################################################################
# void sha512_transform_rorx(struct sha512_block_state *state,
#                            const u8 *data, size_t nblocks);
# Purpose: Updates the SHA512 digest stored at "state" with the message
# stored in "data".
# The size of the message pointed to by "data" must be an integer multiple
# of SHA512 message blocks.
# "nblocks" is the message length in SHA512 blocks.  Must be >= 1.
########################################################################
SYM_FUNC_START(sha512_transform_rorx)

        # Save GPRs
        push    %rbx
        push    %r12
        push    %r13
        push    %r14
        push    %r15

        # Allocate Stack Space
        push    %rbp
        mov     %rsp, %rbp
        sub     $frame_size, %rsp
        and     $~(0x20 - 1), %rsp

        shl     $7, NUM_BLKS    # convert to bytes
        add     INP, NUM_BLKS   # pointer to end of data
        mov     NUM_BLKS, frame_INPEND(%rsp)

        ## load initial digest
        mov     8*0(CTX1), a
        mov     8*1(CTX1), b
        mov     8*2(CTX1), c
        mov     8*3(CTX1), d
        mov     8*4(CTX1), e
        mov     8*5(CTX1), f
        mov     8*6(CTX1), g
        mov     8*7(CTX1), h

        # save %rdi (CTX) before it gets clobbered
        mov     %rdi, frame_CTX(%rsp)

        vmovdqa PSHUFFLE_BYTE_FLIP_MASK(%rip), BYTE_FLIP_MASK

.Lloop0:
        lea     K512(%rip), TBL

        ## byte swap first 16 dwords
        COPY_YMM_AND_BSWAP      Y_0, (INP), BYTE_FLIP_MASK
        COPY_YMM_AND_BSWAP      Y_1, 1*32(INP), BYTE_FLIP_MASK
        COPY_YMM_AND_BSWAP      Y_2, 2*32(INP), BYTE_FLIP_MASK
        COPY_YMM_AND_BSWAP      Y_3, 3*32(INP), BYTE_FLIP_MASK

        mov     INP, frame_INP(%rsp)

        ## schedule 64 input dwords, by doing 12 rounds of 4 each
        movq    $4, frame_SRND(%rsp)

.align 16
.Lloop1:
        vpaddq  (TBL), Y_0, XFER
        vmovdqa XFER, frame_XFER(%rsp)
        FOUR_ROUNDS_AND_SCHED

        vpaddq  1*32(TBL), Y_0, XFER
        vmovdqa XFER, frame_XFER(%rsp)
        FOUR_ROUNDS_AND_SCHED

        vpaddq  2*32(TBL), Y_0, XFER
        vmovdqa XFER, frame_XFER(%rsp)
        FOUR_ROUNDS_AND_SCHED

        vpaddq  3*32(TBL), Y_0, XFER
        vmovdqa XFER, frame_XFER(%rsp)
        add     $(4*32), TBL
        FOUR_ROUNDS_AND_SCHED

        subq    $1, frame_SRND(%rsp)
        jne     .Lloop1

        movq    $2, frame_SRND(%rsp)
.Lloop2:
        vpaddq  (TBL), Y_0, XFER
        vmovdqa XFER, frame_XFER(%rsp)
        DO_4ROUNDS
        vpaddq  1*32(TBL), Y_1, XFER
        vmovdqa XFER, frame_XFER(%rsp)
        add     $(2*32), TBL
        DO_4ROUNDS

        vmovdqa Y_2, Y_0
        vmovdqa Y_3, Y_1

        subq    $1, frame_SRND(%rsp)
        jne     .Lloop2

        mov     frame_CTX(%rsp), CTX2
        addm    8*0(CTX2), a
        addm    8*1(CTX2), b
        addm    8*2(CTX2), c
        addm    8*3(CTX2), d
        addm    8*4(CTX2), e
        addm    8*5(CTX2), f
        addm    8*6(CTX2), g
        addm    8*7(CTX2), h

        mov     frame_INP(%rsp), INP
        add     $128, INP
        cmp     frame_INPEND(%rsp), INP
        jne     .Lloop0

        # Restore Stack Pointer
        mov     %rbp, %rsp
        pop     %rbp

        # Restore GPRs
        pop     %r15
        pop     %r14
        pop     %r13
        pop     %r12
        pop     %rbx

        vzeroupper
        RET
SYM_FUNC_END(sha512_transform_rorx)

########################################################################
### Binary Data


# Mergeable 640-byte rodata section. This allows linker to merge the table
# with other, exactly the same 640-byte fragment of another rodata section
# (if such section exists).
.section        .rodata.cst640.K512, "aM", @progbits, 640
.align 64
# K[t] used in SHA512 hashing
K512:
        .quad   0x428a2f98d728ae22,0x7137449123ef65cd
        .quad   0xb5c0fbcfec4d3b2f,0xe9b5dba58189dbbc
        .quad   0x3956c25bf348b538,0x59f111f1b605d019
        .quad   0x923f82a4af194f9b,0xab1c5ed5da6d8118
        .quad   0xd807aa98a3030242,0x12835b0145706fbe
        .quad   0x243185be4ee4b28c,0x550c7dc3d5ffb4e2
        .quad   0x72be5d74f27b896f,0x80deb1fe3b1696b1
        .quad   0x9bdc06a725c71235,0xc19bf174cf692694
        .quad   0xe49b69c19ef14ad2,0xefbe4786384f25e3
        .quad   0x0fc19dc68b8cd5b5,0x240ca1cc77ac9c65
        .quad   0x2de92c6f592b0275,0x4a7484aa6ea6e483
        .quad   0x5cb0a9dcbd41fbd4,0x76f988da831153b5
        .quad   0x983e5152ee66dfab,0xa831c66d2db43210
        .quad   0xb00327c898fb213f,0xbf597fc7beef0ee4
        .quad   0xc6e00bf33da88fc2,0xd5a79147930aa725
        .quad   0x06ca6351e003826f,0x142929670a0e6e70
        .quad   0x27b70a8546d22ffc,0x2e1b21385c26c926
        .quad   0x4d2c6dfc5ac42aed,0x53380d139d95b3df
        .quad   0x650a73548baf63de,0x766a0abb3c77b2a8
        .quad   0x81c2c92e47edaee6,0x92722c851482353b
        .quad   0xa2bfe8a14cf10364,0xa81a664bbc423001
        .quad   0xc24b8b70d0f89791,0xc76c51a30654be30
        .quad   0xd192e819d6ef5218,0xd69906245565a910
        .quad   0xf40e35855771202a,0x106aa07032bbd1b8
        .quad   0x19a4c116b8d2d0c8,0x1e376c085141ab53
        .quad   0x2748774cdf8eeb99,0x34b0bcb5e19b48a8
        .quad   0x391c0cb3c5c95a63,0x4ed8aa4ae3418acb
        .quad   0x5b9cca4f7763e373,0x682e6ff3d6b2b8a3
        .quad   0x748f82ee5defb2fc,0x78a5636f43172f60
        .quad   0x84c87814a1f0ab72,0x8cc702081a6439ec
        .quad   0x90befffa23631e28,0xa4506cebde82bde9
        .quad   0xbef9a3f7b2c67915,0xc67178f2e372532b
        .quad   0xca273eceea26619c,0xd186b8c721c0c207
        .quad   0xeada7dd6cde0eb1e,0xf57d4f7fee6ed178
        .quad   0x06f067aa72176fba,0x0a637dc5a2c898a6
        .quad   0x113f9804bef90dae,0x1b710b35131c471b
        .quad   0x28db77f523047d84,0x32caab7b40c72493
        .quad   0x3c9ebe0a15c9bebc,0x431d67c49c100d4c
        .quad   0x4cc5d4becb3e42b6,0x597f299cfc657e2a
        .quad   0x5fcb6fab3ad6faec,0x6c44198c4a475817

.section        .rodata.cst32.PSHUFFLE_BYTE_FLIP_MASK, "aM", @progbits, 32
.align 32
# Mask for byte-swapping a couple of qwords in an XMM register using (v)pshufb.
PSHUFFLE_BYTE_FLIP_MASK:
        .octa 0x08090a0b0c0d0e0f0001020304050607
        .octa 0x18191a1b1c1d1e1f1011121314151617

.section        .rodata.cst32.MASK_YMM_LO, "aM", @progbits, 32
.align 32
MASK_YMM_LO:
        .octa 0x00000000000000000000000000000000
        .octa 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF