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C x86_64/sha256-compress-n.asm
ifelse(`
Copyright (C) 2013, 2022 Niels Möller
This file is part of GNU Nettle.
GNU Nettle is free software: you can redistribute it and/or
modify it under the terms of either:
* the GNU Lesser General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at your
option) any later version.
or
* the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your
option) any later version.
or both in parallel, as here.
GNU Nettle is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received copies of the GNU General Public License and
the GNU Lesser General Public License along with this program. If
not, see http://www.gnu.org/licenses/.
')
.file "sha256-compress-n.asm"
define(`STATE', `%rdi')
define(`K', `%rsi')
define(`BLOCKS', `%rdx')
define(`INPUT', `%rcx')
define(`STATE_SAVED', `64(%rsp)')
define(`SA', `%eax')
define(`SB', `%ebx')
define(`SC', `%ebp')
define(`SD', `%r8d')
define(`SE', `%r9d')
define(`SF', `%r10d')
define(`SG', `%r11d')
define(`SH', `%r12d')
define(`T0', `%r13d')
define(`T1', `%r14d')
define(`COUNT', `%rdi') C Overlap STATE
define(`W', `%r15d')
define(`EXPN', `
movl OFFSET($1)(%rsp), W
movl OFFSET(eval(($1 + 14) % 16))(%rsp), T0
movl T0, T1
shrl `$'10, T0
roll `$'13, T1
xorl T1, T0
roll `$'2, T1
xorl T1, T0
addl T0, W
movl OFFSET(eval(($1 + 1) % 16))(%rsp), T0
movl T0, T1
shrl `$'3, T0
roll `$'14, T1
xorl T1, T0
roll `$'11, T1
xorl T1, T0
addl T0, W
addl OFFSET(eval(($1 + 9) % 16))(%rsp), W
movl W, OFFSET($1)(%rsp)
')
C ROUND(A,B,C,D,E,F,G,H,K)
C
C H += S1(E) + Choice(E,F,G) + K + W
C D += H
C H += S0(A) + Majority(A,B,C)
C
C Where
C
C S1(E) = E<<<26 ^ E<<<21 ^ E<<<7
C S0(A) = A<<<30 ^ A<<<19 ^ A<<<10
C Choice (E, F, G) = G^(E&(F^G))
C Majority (A,B,C) = (A&B) + (C&(A^B))
define(`ROUND', `
movl $5, T0
movl $5, T1
roll `$'7, T0
roll `$'21, T1
xorl T0, T1
roll `$'19, T0
xorl T0, T1
addl W, $8
addl T1, $8
movl $7, T0
xorl $6, T0
andl $5, T0
xorl $7, T0
addl OFFSET($9)(K,COUNT,4), $8
addl T0, $8
addl $8, $4
movl $1, T0
movl $1, T1
roll `$'10, T0
roll `$'19, T1
xorl T0, T1
roll `$'20, T0
xorl T0, T1
addl T1, $8
movl $1, T0
movl $1, T1
andl $2, T0
xorl $2, T1
addl T0, $8
andl $3, T1
addl T1, $8
')
define(`NOEXPN', `
movl OFFSET($1)(INPUT, COUNT, 4), W
bswapl W
movl W, OFFSET($1)(%rsp, COUNT, 4)
')
C const uint8_t *
C _nettle_sha256_compress_n(uint32_t *state, const uint32_t *k,
C size_t blocks, const uint8_t *input)
.text
ALIGN(16)
PROLOGUE(_nettle_sha256_compress_n)
W64_ENTRY(4, 0)
test BLOCKS, BLOCKS
jz .Lend
sub $120, %rsp
mov STATE, STATE_SAVED C Save state, to free a register
mov %rbx, 72(%rsp)
mov %rbp, 80(%rsp)
mov %r12, 88(%rsp)
mov %r13, 96(%rsp)
mov %r14, 104(%rsp)
mov %r15, 112(%rsp)
movl (STATE), SA
movl 4(STATE), SB
movl 8(STATE), SC
movl 12(STATE), SD
movl 16(STATE), SE
movl 20(STATE), SF
movl 24(STATE), SG
movl 28(STATE), SH
.Loop_block:
xorl XREG(COUNT), XREG(COUNT)
ALIGN(16)
.Loop1:
NOEXPN(0) ROUND(SA,SB,SC,SD,SE,SF,SG,SH,0)
NOEXPN(1) ROUND(SH,SA,SB,SC,SD,SE,SF,SG,1)
NOEXPN(2) ROUND(SG,SH,SA,SB,SC,SD,SE,SF,2)
NOEXPN(3) ROUND(SF,SG,SH,SA,SB,SC,SD,SE,3)
NOEXPN(4) ROUND(SE,SF,SG,SH,SA,SB,SC,SD,4)
NOEXPN(5) ROUND(SD,SE,SF,SG,SH,SA,SB,SC,5)
NOEXPN(6) ROUND(SC,SD,SE,SF,SG,SH,SA,SB,6)
NOEXPN(7) ROUND(SB,SC,SD,SE,SF,SG,SH,SA,7)
addl $8, XREG(COUNT)
cmpl $16, XREG(COUNT)
jne .Loop1
.Loop2:
EXPN( 0) ROUND(SA,SB,SC,SD,SE,SF,SG,SH,0)
EXPN( 1) ROUND(SH,SA,SB,SC,SD,SE,SF,SG,1)
EXPN( 2) ROUND(SG,SH,SA,SB,SC,SD,SE,SF,2)
EXPN( 3) ROUND(SF,SG,SH,SA,SB,SC,SD,SE,3)
EXPN( 4) ROUND(SE,SF,SG,SH,SA,SB,SC,SD,4)
EXPN( 5) ROUND(SD,SE,SF,SG,SH,SA,SB,SC,5)
EXPN( 6) ROUND(SC,SD,SE,SF,SG,SH,SA,SB,6)
EXPN( 7) ROUND(SB,SC,SD,SE,SF,SG,SH,SA,7)
EXPN( 8) ROUND(SA,SB,SC,SD,SE,SF,SG,SH,8)
EXPN( 9) ROUND(SH,SA,SB,SC,SD,SE,SF,SG,9)
EXPN(10) ROUND(SG,SH,SA,SB,SC,SD,SE,SF,10)
EXPN(11) ROUND(SF,SG,SH,SA,SB,SC,SD,SE,11)
EXPN(12) ROUND(SE,SF,SG,SH,SA,SB,SC,SD,12)
EXPN(13) ROUND(SD,SE,SF,SG,SH,SA,SB,SC,13)
EXPN(14) ROUND(SC,SD,SE,SF,SG,SH,SA,SB,14)
EXPN(15) ROUND(SB,SC,SD,SE,SF,SG,SH,SA,15)
addl $16, XREG(COUNT)
cmpl $64, XREG(COUNT)
jne .Loop2
mov STATE_SAVED, STATE
addl (STATE), SA
addl 4(STATE), SB
addl 8(STATE), SC
addl 12(STATE), SD
addl 16(STATE), SE
addl 20(STATE), SF
addl 24(STATE), SG
addl 28(STATE), SH
movl SA, (STATE)
movl SB, 4(STATE)
movl SC, 8(STATE)
movl SD, 12(STATE)
movl SE, 16(STATE)
movl SF, 20(STATE)
movl SG, 24(STATE)
movl SH, 28(STATE)
add $64, INPUT
dec BLOCKS
jnz .Loop_block
mov 72(%rsp), %rbx
mov 80(%rsp), %rbp
mov 88(%rsp), %r12
mov 96(%rsp), %r13
mov 104(%rsp),%r14
mov 112(%rsp),%r15
add $120, %rsp
.Lend:
mov INPUT, %rax
W64_EXIT(4, 0)
ret
EPILOGUE(_nettle_sha256_compress_n)
|
