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lavc/riscv: depend on RVB and simplify accordingly

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There is no known (real) hardware with V and without the complete B
extension. B was indeed required in the RISC-V application profile from
2022, earlier than V. There should not be any relevant hardware in the
future either.

In practice, different R-V Vector optimisations in FFmpeg already depend on
every constituent of the B extension anyhow, so it would not work well.
This commit is contained in:
Rémi Denis-Courmont 2024-07-27 14:30:17 +03:00
parent cb31f17ca8
commit 616fdeaea3
22 changed files with 45 additions and 47 deletions
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2
libavcodec/riscv/rv40dsp_init.c
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@ -41,7 +41,7 @@ av_cold void ff_rv40dsp_init_riscv(RV34DSPContext *c)
int flags = av_get_cpu_flags();
if ((flags & AV_CPU_FLAG_RVV_I32) && ff_rv_vlen_least(128) &&
(flags & AV_CPU_FLAG_RVB_ADDR)) {
(flags & AV_CPU_FLAG_RVB)) {
c->put_chroma_pixels_tab[0] = ff_put_rv40_chroma_mc8_rvv;
c->put_chroma_pixels_tab[1] = ff_put_rv40_chroma_mc4_rvv;
c->avg_chroma_pixels_tab[0] = ff_avg_rv40_chroma_mc8_rvv;