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- ;*****************************************************************************
- ;* 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
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