在 2021/7/29 20:26, Jiaxun Yang 写道:
在2021年7月29日七月 下午5:29，yinshiyou...@loongson.cn写道：
-----原始邮件-----
发件人: "Jiaxun Yang" <jiaxun.y...@flygoat.com>
发送时间: 2021-07-29 14:32:35 (星期四)
收件人: ffmpeg-devel@ffmpeg.org
抄送: yinshiyou...@loongson.cn, "Jiaxun Yang" <jiaxun.y...@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.y...@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
Hmm, I don't think it's worthy to hava a configure option for this.
and adding 'pxor' support in upstream gcc/clang.
Are you going to input anything?
If not I may request TC comment next week.
Downstream users are complaining about the breakage.
Thanks.
- Jiaxun
For clang I don't think it's possible as we don't have loongson mmi support in
upstream codebase.
For GCC I'd like to have a try but I need a full list of instructions needs to
be converted as I asked in another thread.
Also given that we've already have many users with older toolchain and it's
impossible to let them upgrade at once, this method could address the issue
without trouble present users.
Thanks.
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