[FFmpeg-cvslog] lavu/riscv: remove bogus B extension

[Rémi Denis-Courmont]

ffmpeg | branch: master | Rémi Denis-Courmont <remi at remlab.net> | Sat May 11 19:05:06 2024 +0300| [20fbc07af1ebd5a68b8fd1203ceb4cab60bd7328] | committer: Rémi Denis-Courmont

lavu/riscv: remove bogus B extension

The B Bit manipulation extension was not defined to this day, and
probably never will. Instead it was broken down into Zba, Zbb, Zbc and
Zbs with no particular blessed set to make up B.

This removes the bogus field test. Linux never set this bit, nor
(AFAICT) did FreeBSD or any other OS. We can always add it back in the
unlikely event that it gets taken into use.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=20fbc07af1ebd5a68b8fd1203ceb4cab60bd7328
---

 libavutil/riscv/cpu.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/libavutil/riscv/cpu.c b/libavutil/riscv/cpu.c
index 1fe1a397c4..9b57d77502 100644
--- a/libavutil/riscv/cpu.c
+++ b/libavutil/riscv/cpu.c
@@ -91,8 +91,6 @@ int ff_get_cpu_flags_riscv(void)
             ret |= AV_CPU_FLAG_RVF;
         if (hwcap & HWCAP_RV('D'))
             ret |= AV_CPU_FLAG_RVD;
-        if (hwcap & HWCAP_RV('B'))
-            ret |= AV_CPU_FLAG_RVB_ADDR | AV_CPU_FLAG_RVB_BASIC;
 
         /* The V extension implies all Zve* functional subsets */
         if (hwcap & HWCAP_RV('V'))