Le 3 décembre 2023 19:50:18 GMT+02:00, Zhao Zhili <quinkbl...@foxmail.com> a écrit : > > >> On Oct 3, 2023, at 00:47, Rémi Denis-Courmont <r...@remlab.net> wrote: >> >> >> diff --git a/libavcodec/riscv/ac3dsp_rvb.S b/libavcodec/riscv/ac3dsp_rvb.S >> new file mode 100644 >> index 0000000000..48f8bb101e >> --- /dev/null >> +++ b/libavcodec/riscv/ac3dsp_rvb.S >> >> +func ff_extract_exponents_rvb, zbb >> +1: >> + lw t0, (a1) >> + addi a0, a0, 1 >> + neg t1, t0 >> + addi a1, a1, 4 >> + max t0, t0, t1 >> + addi a2, a2, -1 >> + clz t0, t0 >> + addi t0, t0, 24 - __riscv_xlen >> + sb t0, -1(a0) >> + bgtz a2, 1b >> + >> + ret >> +endfunc >> — > >Got build failure with clang 14: > ><instantiation>:6:21: warning: unknown option, expected 'push', 'pop', 'rvc', >'norvc', 'relax' or 'norelax' > .option arch, +zbb > ^ >src/libavcodec/riscv/ac3dsp_rvb.S:24:1: note: while in macro instantiation >func ff_extract_exponents_rvb, zbb >^ >src/libavcodec/riscv/ac3dsp_rvb.S:30:9: error: instruction requires the >following: 'Zbb' (Basic Bit-Manipulation) > max t0, t0, t1 > ^ >src/libavcodec/riscv/ac3dsp_rvb.S:32:9: error: instruction requires the >following: 'Zbb' (Basic Bit-Manipulation) > clz t0, t0 > ^ >make: *** [/home/quink/work/ffmpeg/ffbuild/common.mak:93: >libavcodec/riscv/ac3dsp_rvb.o] Error 1 >make: *** Waiting for unfinished jobs.... ><instantiation>:6:21: warning: unknown option, expected 'push', 'pop', 'rvc', >'norvc', 'relax' or 'norelax' > .option arch, +f > ^ >src/libavcodec/riscv/audiodsp_rvf.S:23:1: note: while in macro instantiation >func ff_vector_clipf_rvf, f >^ > >Someone says clang 14 has Zbb extensions support. I don’t know what’s going on.
Forgot the explanation: the problem seems to be the arch option, not the Zbb extension. I think you can get around it with -no-integrated-as, but then... what I said in the other mail. Br, _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".