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