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4349 Serge 1 
;******************************************************************************
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;* Vorbis x86 optimizations
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;* Copyright (C) 2006 Loren Merritt
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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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%if ARCH_X86_32
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INIT_MMX 3dnow
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cglobal vorbis_inverse_coupling, 3, 3, 6, mag, ang, block_size
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    pxor                     m7, m7
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    lea                    magq, [magq+block_sizeq*4]
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    lea                    angq, [angq+block_sizeq*4]
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    neg             block_sizeq
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.loop:
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    mova                     m0, [magq+block_sizeq*4]
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    mova                     m1, [angq+block_sizeq*4]
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    mova                     m2, m0
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    mova                     m3, m1
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    pfcmpge                  m2, m7     ; m <= 0.0
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    pfcmpge                  m3, m7     ; a <= 0.0
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    pslld                    m2, 31     ; keep only the sign bit
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    pxor                     m1, m2
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    mova                     m4, m3
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    pand                     m3, m1
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    pandn                    m4, m1
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    pfadd                    m3, m0     ; a = m + ((a < 0) & (a ^ sign(m)))
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    pfsub                    m0, m4     ; m = m + ((a > 0) & (a ^ sign(m)))
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    mova   [angq+block_sizeq*4], m3
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    mova   [magq+block_sizeq*4], m0
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    add             block_sizeq, 2
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    jl .loop
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    femms
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    RET
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%endif
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INIT_XMM sse
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cglobal vorbis_inverse_coupling, 3, 4, 6, mag, ang, block_size, cntr
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    mova                     m5, [pdw_80000000]
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    xor                   cntrq, cntrq
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align 16
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.loop:
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    mova                     m0, [magq+cntrq*4]
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    mova                     m1, [angq+cntrq*4]
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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+cntrq*4], m3
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    mova         [magq+cntrq*4], m0
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    add                   cntrq, 4
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    cmp                   cntrq, block_sizeq
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    jl .loop
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    RET