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;*****************************************************************************
;* Copyright (c) 2015 Rodger Combs <rodger.combs@gmail.com>
;*
;* This file is part of FFmpeg.
;*
;* FFmpeg is free software; you can redistribute it and/or
;* modify it under the terms of the GNU Lesser General Public
;* License as published by the Free Software Foundation; either
;* version 2.1 of the License, or (at your option) any later version.
;*
;* FFmpeg 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
;* Lesser General Public License for more details.
;*
;* You should have received a copy of the GNU Lesser General Public
;* License along with FFmpeg; if not, write to the Free Software
;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
;******************************************************************************
%include "x86util.asm"
SECTION .text
;-----------------------------------------------------------------------------
; void ff_aes_decrypt(AVAES *a, uint8_t *dst, const uint8_t *src,
; int count, uint8_t *iv, int rounds)
;-----------------------------------------------------------------------------
%macro AES_CRYPT 2
cglobal aes_%1rypt_%2, 5, 5, 2
test r3d, r3d
je .ret
shl r3d, 4
add r0, 0x70
add r2, r3
add r1, r3
neg r3
pxor m1, m1
test r4, r4
je .block
movu m1, [r4] ; iv
.block:
movu m0, [r2+r3] ; state
%ifidn %1, enc
pxor m0, m1
%endif
pxor m0, [r0+8*2*%2-0x70]
%if %2 > 10
%if %2 > 12
aes%1 m0, [r0+0x60]
aes%1 m0, [r0+0x50]
%endif
aes%1 m0, [r0+0x40]
aes%1 m0, [r0+0x30]
%endif
aes%1 m0, [r0+0x20]
aes%1 m0, [r0+0x10]
aes%1 m0, [r0+0x00]
aes%1 m0, [r0-0x10]
aes%1 m0, [r0-0x20]
aes%1 m0, [r0-0x30]
aes%1 m0, [r0-0x40]
aes%1 m0, [r0-0x50]
aes%1 m0, [r0-0x60]
aes%1last m0, [r0-0x70]
test r4, r4
je .noiv
%ifidn %1, enc
mova m1, m0
%else
pxor m0, m1
movu m1, [r2+r3]
%endif
.noiv:
movu [r1+r3], m0
add r3, 16
jl .block
test r4, r4
je .ret
%ifidn %1, dec
movu [r4], m1
%else
movu [r4], m0
%endif
.ret:
REP_RET
%endmacro
%if HAVE_AESNI_EXTERNAL
INIT_XMM aesni
AES_CRYPT enc, 10
AES_CRYPT enc, 12
AES_CRYPT enc, 14
AES_CRYPT dec, 10
AES_CRYPT dec, 12
AES_CRYPT dec, 14
%endif
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