mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
135 lines
3.1 KiB
135 lines
3.1 KiB
;****************************************************************************** |
|
;* optimized bswap buffer functions |
|
;* Copyright (c) 2008 Loren Merritt |
|
;* |
|
;* This file is part of Libav. |
|
;* |
|
;* Libav 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. |
|
;* |
|
;* Libav 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 Libav; 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_bswap32: db 3, 2, 1, 0, 7, 6, 5, 4, 11, 10, 9, 8, 15, 14, 13, 12 |
|
|
|
SECTION_TEXT |
|
|
|
; %1 = aligned/unaligned |
|
%macro BSWAP_LOOPS 1 |
|
mov r3, r2 |
|
sar r2, 3 |
|
jz .left4_%1 |
|
.loop8_%1: |
|
mov%1 m0, [r1 + 0] |
|
mov%1 m1, [r1 + 16] |
|
%if cpuflag(ssse3) |
|
pshufb m0, m2 |
|
pshufb m1, m2 |
|
mov%1 [r0 + 0], m0 |
|
mov%1 [r0 + 16], m1 |
|
%else |
|
pshuflw m0, m0, 10110001b |
|
pshuflw m1, m1, 10110001b |
|
pshufhw m0, m0, 10110001b |
|
pshufhw m1, m1, 10110001b |
|
mova m2, m0 |
|
mova m3, m1 |
|
psllw m0, 8 |
|
psllw m1, 8 |
|
psrlw m2, 8 |
|
psrlw m3, 8 |
|
por m2, m0 |
|
por m3, m1 |
|
mov%1 [r0 + 0], m2 |
|
mov%1 [r0 + 16], m3 |
|
%endif |
|
add r0, 32 |
|
add r1, 32 |
|
dec r2 |
|
jnz .loop8_%1 |
|
.left4_%1: |
|
mov r2, r3 |
|
and r3, 4 |
|
jz .left |
|
mov%1 m0, [r1] |
|
%if cpuflag(ssse3) |
|
pshufb m0, m2 |
|
mov%1 [r0], m0 |
|
%else |
|
pshuflw m0, m0, 10110001b |
|
pshufhw m0, m0, 10110001b |
|
mova m2, m0 |
|
psllw m0, 8 |
|
psrlw m2, 8 |
|
por m2, m0 |
|
mov%1 [r0], m2 |
|
%endif |
|
add r1, 16 |
|
add r0, 16 |
|
%endmacro |
|
|
|
; void ff_bswap_buf(uint32_t *dst, const uint32_t *src, int w); |
|
%macro BSWAP32_BUF 0 |
|
%if cpuflag(ssse3) |
|
cglobal bswap32_buf, 3,4,3 |
|
mov r3, r1 |
|
mova m2, [pb_bswap32] |
|
%else |
|
cglobal bswap32_buf, 3,4,5 |
|
mov r3, r1 |
|
%endif |
|
and r3, 15 |
|
jz .start_align |
|
BSWAP_LOOPS u |
|
jmp .left |
|
.start_align: |
|
BSWAP_LOOPS a |
|
.left: |
|
%if cpuflag(ssse3) |
|
mov r3, r2 |
|
and r2, 2 |
|
jz .left1 |
|
movq m0, [r1] |
|
pshufb m0, m2 |
|
movq [r0], m0 |
|
add r1, 8 |
|
add r0, 8 |
|
.left1: |
|
and r3, 1 |
|
jz .end |
|
mov r2d, [r1] |
|
bswap r2d |
|
mov [r0], r2d |
|
%else |
|
and r2, 3 |
|
jz .end |
|
.loop2: |
|
mov r3d, [r1] |
|
bswap r3d |
|
mov [r0], r3d |
|
add r1, 4 |
|
add r0, 4 |
|
dec r2 |
|
jnz .loop2 |
|
%endif |
|
.end: |
|
RET |
|
%endmacro |
|
|
|
INIT_XMM sse2 |
|
BSWAP32_BUF |
|
|
|
INIT_XMM ssse3 |
|
BSWAP32_BUF
|
|
|