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57 lines
2.1 KiB
57 lines
2.1 KiB
;****************************************************************************** |
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;* Vorbis x86 optimizations |
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;* Copyright (C) 2006 Loren Merritt <lorenm@u.washington.edu> |
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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 "libavutil/x86/x86util.asm" |
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SECTION_RODATA |
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pdw_80000000: times 4 dd 0x80000000 |
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SECTION .text |
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INIT_XMM sse |
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cglobal vorbis_inverse_coupling, 3, 3, 6, mag, ang, block_size |
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mova m5, [pdw_80000000] |
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shl block_sized, 2 |
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add magq, block_sizeq |
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add angq, block_sizeq |
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neg block_sizeq |
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align 16 |
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.loop: |
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mova m0, [magq+block_sizeq] |
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mova m1, [angq+block_sizeq] |
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xorps m2, m2 |
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xorps m3, m3 |
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cmpleps m2, m0 ; m <= 0.0 |
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cmpleps m3, m1 ; a <= 0.0 |
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andps m2, m5 ; keep only the sign bit |
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xorps m1, m2 |
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mova m4, m3 |
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andps m3, m1 |
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andnps m4, m1 |
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addps m3, m0 ; a = m + ((a < 0) & (a ^ sign(m))) |
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subps m0, m4 ; m = m + ((a > 0) & (a ^ sign(m))) |
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mova [angq+block_sizeq], m3 |
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mova [magq+block_sizeq], m0 |
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add block_sizeq, mmsize |
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jl .loop |
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RET
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