[FFmpeg-devel] [PATCH] avcodec/mips: Support old style mmi instruction mnemonics

[yinshiyou-hf at loongson.cn]

> -----原始邮件-----
> 发件人: "Jiaxun Yang" <jiaxun.yang at flygoat.com>
> 发送时间: 2021-07-29 14:32:35 (星期四)
> 收件人: ffmpeg-devel at ffmpeg.org
> 抄送: yinshiyou-hf at loongson.cn, "Jiaxun Yang" <jiaxun.yang at flygoat.com>
> 主题: [PATCH] avcodec/mips: Support old style mmi instruction mnemonics
> 
> Loongson had renamed serval instruction mnemonics to distinguish
> integral and simd opreations. In ebedd26 ("libavcodec/mips: Fix
> specification of instruction name"), all old style mnemonics are
> replaced by the new one.
> However, upstream GCC doesn't support new style mnemonics, it breaks
> build.
> As stated by Loongson, their GCC toolchain support both style while
> clang only support the new one, we'll use new style for clang only.
> 
> Signed-off-by: Jiaxun Yang <jiaxun.yang at flygoat.com>
> ---
>  libavcodec/mips/blockdsp_mmi.c    |   8 +-
>  libavcodec/mips/h264chroma_mmi.c  |  20 +--
>  libavcodec/mips/h264dsp_mmi.c     | 288 +++++++++++++++---------------
>  libavcodec/mips/h264pred_mmi.c    |  18 +-
>  libavcodec/mips/h264qpel_mmi.c    |  26 +--
>  libavcodec/mips/hevcdsp_mmi.c     |  32 ++--
>  libavcodec/mips/hpeldsp_mmi.c     |  26 +--
>  libavcodec/mips/idctdsp_mmi.c     |   2 +-
>  libavcodec/mips/mpegvideo_mmi.c   |  94 +++++-----
>  libavcodec/mips/pixblockdsp_mmi.c |   8 +-
>  libavcodec/mips/simple_idct_mmi.c |  14 +-
>  libavcodec/mips/vc1dsp_mmi.c      |  34 ++--
>  libavcodec/mips/vp3dsp_idct_mmi.c | 132 +++++++-------
>  libavcodec/mips/vp8dsp_mmi.c      |  80 ++++-----
>  libavcodec/mips/vp9_mc_mmi.c      |  10 +-
>  libavcodec/mips/wmv2dsp_mmi.c     |   2 +-
>  libavutil/mips/mmiutils.h         |  22 +++
>  17 files changed, 419 insertions(+), 397 deletions(-)


> 

I suggest adding 'pxor' check in configure

and adding 'pxor' support in upstream gcc/clang.