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48 lines
1.6 KiB
48 lines
1.6 KiB
;***************************************************************************** |
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;* x86-optimized Float DSP functions |
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;* |
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;* Copyright 2016 James Almer |
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;* |
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;* This file is part of FFmpeg. |
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;* |
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;* FFmpeg is free software; you can redistribute it and/or |
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;* modify it under the terms of the GNU Lesser General Public |
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;* License as published by the Free Software Foundation; either |
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;* version 2.1 of the License, or (at your option) any later version. |
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;* |
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;* FFmpeg is distributed in the hope that it will be useful, |
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;* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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;* Lesser General Public License for more details. |
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;* |
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;* You should have received a copy of the GNU Lesser General Public |
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;* License along with FFmpeg; if not, write to the Free Software |
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;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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;****************************************************************************** |
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%include "x86util.asm" |
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SECTION .text |
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;----------------------------------------------------------------------------- |
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; void ff_butterflies_fixed(float *src0, float *src1, int len); |
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;----------------------------------------------------------------------------- |
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INIT_XMM sse2 |
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cglobal butterflies_fixed, 3,3,3, src0, src1, len |
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shl lend, 2 |
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add src0q, lenq |
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add src1q, lenq |
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neg lenq |
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align 16 |
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.loop: |
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mova m0, [src0q + lenq] |
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mova m1, [src1q + lenq] |
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mova m2, m0 |
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paddd m0, m1 |
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psubd m2, m1 |
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mova [src0q + lenq], m0 |
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mova [src1q + lenq], m2 |
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add lenq, mmsize |
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jl .loop |
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RET
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