Le tiistaina 7. toukokuuta 2024, 20.41.30 EEST Lynne a écrit :
> May 7, 2024, 18:54 by u...@foxmail.com:
> > From: sunyuechi <sunyue...@iscas.ac.cn>
> >
> > C908:
> > vp8_put_pixels4_c: 78.0
> > vp8_put_pixels4_rvi: 33.7
> > vp8_put_pixels8_c: 278.0
> > vp8_put_pixels8_rvi: 55.0
> > vp8_put_pixels16_c: 999.0
> > vp8_put_pixels16_rvi: 86.7
> > ---
> >
> > libavcodec/riscv/Makefile | 1 +
> > libavcodec/riscv/vp8dsp.h | 75 ++++++++++++++++++++++++++++++++++
> > libavcodec/riscv/vp8dsp_init.c | 22 ++++++++++
> > libavcodec/riscv/vp8dsp_rvi.S | 61 +++++++++++++++++++++++++++
> > libavcodec/vp8dsp.c | 2 +
> > libavcodec/vp8dsp.h | 1 +
> > 6 files changed, 162 insertions(+)
> > create mode 100644 libavcodec/riscv/vp8dsp.h
> > create mode 100644 libavcodec/riscv/vp8dsp_rvi.S
> >
> > +
> > +av_cold void ff_vp78dsp_init_riscv(VP8DSPContext *c)
> > +{
> > +#if HAVE_RV
> > + int flags = av_get_cpu_flags();
> > + if (flags & AV_CPU_FLAG_RVI) {
> > +#if __riscv_xlen >= 64
>
> Why are you not detecting this at runtime?
XLEN is a compile time constant of the ABI. You cannot run 32-bit code in 64-
bit mode, and the ELF loader will not allow you to do so.
--
Rémi Denis-Courmont
http://www.remlab.net/
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