mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-24 08:12:44 +00:00
49 lines
1.6 KiB
NASM
49 lines
1.6 KiB
NASM
|
;*****************************************************************************
|
||
|
|
;* x86-optimized Float DSP functions
|
||
|
|
;*
|
||
|
|
;* Copyright 2016 James Almer
|
||
|
|
;*
|
||
|
|
;* 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_butterflies_fixed(float *src0, float *src1, int len);
|
||
|
|
;-----------------------------------------------------------------------------
|
||
|
|
INIT_XMM sse2
|
||
|
|
cglobal butterflies_fixed, 3,3,3, src0, src1, len
|
||
|
|
shl lend, 2
|
||
|
|
add src0q, lenq
|
||
|
|
add src1q, lenq
|
||
|
|
neg lenq
|
||
|
|
|
||
|
|
align 16
|
||
|
|
.loop:
|
||
|
|
mova m0, [src0q + lenq]
|
||
|
|
mova m1, [src1q + lenq]
|
||
|
|
mova m2, m0
|
||
|
|
paddd m0, m1
|
||
|
|
psubd m2, m1
|
||
|
|
mova [src0q + lenq], m0
|
||
|
|
mova [src1q + lenq], m2
|
||
|
|
add lenq, mmsize
|
||
|
|
jl .loop
|
||
|
|
RET
|