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;******************************************************************************
;* Copyright Nick Kurshev
;* Copyright Michael (michaelni@gmx.at)
;* Copyright 2018 Jokyo Images
;*
;* 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 "libavutil/x86/x86util.asm"
SECTION_RODATA
pb_shuffle2103: db 2, 1, 0, 3, 6, 5, 4, 7, 10, 9, 8, 11, 14, 13, 12, 15
pb_shuffle0321: db 0, 3, 2, 1, 4, 7, 6, 5, 8, 11, 10, 9, 12, 15, 14, 13
pb_shuffle1230: db 1, 2, 3, 0, 5, 6, 7, 4, 9, 10, 11, 8, 13, 14, 15, 12
pb_shuffle3012: db 3, 0, 1, 2, 7, 4, 5, 6, 11, 8, 9, 10, 15, 12, 13, 14
pb_shuffle3210: db 3, 2, 1, 0, 7, 6, 5, 4, 11, 10, 9, 8, 15, 14, 13, 12
SECTION .text
;------------------------------------------------------------------------------
; shuffle_bytes_## (const uint8_t *src, uint8_t *dst, int src_size)
;------------------------------------------------------------------------------
; %1-4 index shuffle
%macro SHUFFLE_BYTES 4
cglobal shuffle_bytes_%1%2%3%4, 3, 5, 2, src, dst, w, tmp, x
VBROADCASTI128 m0, [pb_shuffle%1%2%3%4]
movsxdifnidn wq, wd
mov xq, wq
add srcq, wq
add dstq, wq
neg wq
;calc scalar loop
and xq, mmsize-4
je .loop_simd
.loop_scalar:
mov tmpb, [srcq + wq + %1]
mov [dstq+wq + 0], tmpb
mov tmpb, [srcq + wq + %2]
mov [dstq+wq + 1], tmpb
mov tmpb, [srcq + wq + %3]
mov [dstq+wq + 2], tmpb
mov tmpb, [srcq + wq + %4]
mov [dstq+wq + 3], tmpb
add wq, 4
sub xq, 4
jg .loop_scalar
;check if src_size < mmsize
cmp wq, 0
jge .end
.loop_simd:
movu m1, [srcq+wq]
pshufb m1, m0
movu [dstq+wq], m1
add wq, mmsize
jl .loop_simd
.end:
RET
%endmacro
INIT_XMM ssse3
SHUFFLE_BYTES 2, 1, 0, 3
SHUFFLE_BYTES 0, 3, 2, 1
SHUFFLE_BYTES 1, 2, 3, 0
SHUFFLE_BYTES 3, 0, 1, 2
SHUFFLE_BYTES 3, 2, 1, 0
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