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https://github.com/FFmpeg/FFmpeg.git
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108 lines
2.9 KiB
NASM
108 lines
2.9 KiB
NASM
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;*******************************************************************************
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;* SIMD-optimized IDCT functions for HEVC decoding
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;* Copyright (c) 2014 Pierre-Edouard LEPERE
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;* Copyright (c) 2014 James Almer
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;*
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;* This file is part of Libav.
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;*
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;* Libav 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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;* Libav 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 Libav; 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 .text
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; void ff_hevc_idctHxW_dc_{8,10}_<opt>(int16_t *coeffs)
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; %1 = HxW
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; %2 = number of loops
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; %3 = bitdepth
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%macro IDCT_DC 3
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cglobal hevc_idct_%1x%1_dc_%3, 1, 2, 1, coeff, tmp
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movsx tmpd, word [coeffq]
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add tmpd, (1 << (14 - %3)) + 1
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sar tmpd, (15 - %3)
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movd xm0, tmpd
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SPLATW m0, xm0
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DEFINE_ARGS coeff, cnt
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mov cntd, %2
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.loop:
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mova [coeffq+mmsize*0], m0
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mova [coeffq+mmsize*1], m0
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mova [coeffq+mmsize*2], m0
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mova [coeffq+mmsize*3], m0
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add coeffq, mmsize*8
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mova [coeffq+mmsize*-4], m0
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mova [coeffq+mmsize*-3], m0
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mova [coeffq+mmsize*-2], m0
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mova [coeffq+mmsize*-1], m0
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dec cntd
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jg .loop
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RET
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%endmacro
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; %1 = HxW
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; %2 = bitdepth
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%macro IDCT_DC_NL 2 ; No loop
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cglobal hevc_idct_%1x%1_dc_%2, 1, 2, 1, coeff, tmp
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movsx tmpd, word [coeffq]
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add tmpd, (1 << (14 - %2)) + 1
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sar tmpd, (15 - %2)
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movd m0, tmpd
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SPLATW m0, xm0
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mova [coeffq+mmsize*0], m0
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mova [coeffq+mmsize*1], m0
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mova [coeffq+mmsize*2], m0
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mova [coeffq+mmsize*3], m0
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%if mmsize == 16
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mova [coeffq+mmsize*4], m0
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mova [coeffq+mmsize*5], m0
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mova [coeffq+mmsize*6], m0
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mova [coeffq+mmsize*7], m0
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%endif
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RET
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%endmacro
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; 8-bit
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INIT_MMX mmxext
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IDCT_DC_NL 4, 8
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IDCT_DC 8, 2, 8
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INIT_XMM sse2
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IDCT_DC_NL 8, 8
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IDCT_DC 16, 4, 8
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IDCT_DC 32, 16, 8
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%if HAVE_AVX2_EXTERNAL
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INIT_YMM avx2
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IDCT_DC 16, 2, 8
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IDCT_DC 32, 8, 8
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%endif ;HAVE_AVX2_EXTERNAL
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; 10-bit
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INIT_MMX mmxext
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IDCT_DC_NL 4, 10
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IDCT_DC 8, 2, 10
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INIT_XMM sse2
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IDCT_DC_NL 8, 10
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IDCT_DC 16, 4, 10
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IDCT_DC 32, 16, 10
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%if HAVE_AVX2_EXTERNAL
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INIT_YMM avx2
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IDCT_DC 16, 2, 10
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IDCT_DC 32, 8, 10
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%endif ;HAVE_AVX2_EXTERNAL
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