mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-12 19:18:44 +02:00
84 lines
3.1 KiB
NASM
84 lines
3.1 KiB
NASM
|
;******************************************************************************
|
||
|
|
;* Vorbis x86 optimizations
|
||
|
|
;* Copyright (C) 2006 Loren Merritt <lorenm@u.washington.edu>
|
||
|
|
;*
|
||
|
|
;* This file is part of Libav.
|
||
|
|
;*
|
||
|
|
;* Libav 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.
|
||
|
|
;*
|
||
|
|
;* Libav 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 Libav; 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
|
||
|
|
|
||
|
|
%if ARCH_X86_32
|
||
|
|
INIT_MMX 3dnow
|
||
|
|
cglobal vorbis_inverse_coupling, 3, 3, 6, mag, ang, block_size
|
||
|
|
pxor m7, m7
|
||
|
|
lea magq, [magq+block_sizeq*4]
|
||
|
|
lea angq, [angq+block_sizeq*4]
|
||
|
|
neg block_sizeq
|
||
|
|
.loop:
|
||
|
|
mova m0, [magq+block_sizeq*4]
|
||
|
|
mova m1, [angq+block_sizeq*4]
|
||
|
|
mova m2, m0
|
||
|
|
mova m3, m1
|
||
|
|
pfcmpge m2, m7 ; m <= 0.0
|
||
|
|
pfcmpge m3, m7 ; a <= 0.0
|
||
|
|
pslld m2, 31 ; keep only the sign bit
|
||
|
|
pxor m1, m2
|
||
|
|
mova m4, m3
|
||
|
|
pand m3, m1
|
||
|
|
pandn m4, m1
|
||
|
|
pfadd m3, m0 ; a = m + ((a < 0) & (a ^ sign(m)))
|
||
|
|
pfsub m0, m4 ; m = m + ((a > 0) & (a ^ sign(m)))
|
||
|
|
mova [angq+block_sizeq*4], m3
|
||
|
|
mova [magq+block_sizeq*4], m0
|
||
|
|
add block_sizeq, 2
|
||
|
|
jl .loop
|
||
|
|
femms
|
||
|
|
RET
|
||
|
|
%endif
|
||
|
|
|
||
|
|
INIT_XMM sse
|
||
|
|
cglobal vorbis_inverse_coupling, 3, 4, 6, mag, ang, block_size, cntr
|
||
|
|
mova m5, [pdw_80000000]
|
||
|
|
xor cntrq, cntrq
|
||
|
|
align 16
|
||
|
|
.loop:
|
||
|
|
mova m0, [magq+cntrq*4]
|
||
|
|
mova m1, [angq+cntrq*4]
|
||
|
|
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+cntrq*4], m3
|
||
|
|
mova [magq+cntrq*4], m0
|
||
|
|
add cntrq, 4
|
||
|
|
cmp cntrq, block_sizeq
|
||
|
|
jl .loop
|
||
|
|
RET
|