Le 22 mai 2024 23:28:54 GMT+03:00, "Rémi Denis-Courmont" <r...@remlab.net> a écrit : >This removes one stray LI and reworks the vector arithmetic to avoid >changing the vector configuration. On K230, this takes the 46.5 cycle >count down from 46.5 to 43.5. >--- > libavcodec/riscv/rv34dsp_rvv.S | 13 ++++++------- > 1 file changed, 6 insertions(+), 7 deletions(-) > >diff --git a/libavcodec/riscv/rv34dsp_rvv.S b/libavcodec/riscv/rv34dsp_rvv.S >index f1f6345012..e8aff7e570 100644 >--- a/libavcodec/riscv/rv34dsp_rvv.S >+++ b/libavcodec/riscv/rv34dsp_rvv.S >@@ -36,16 +36,15 @@ func ff_rv34_idct_dc_add_rvv, zve32x > vsetivli zero, 4, e8, mf4, ta, ma > vlse32.v v0, (a0), a1 > li t1, 169 >+ li t2, 128 > mul t1, t1, a2 >- li a2, 255 >+ vsetivli zero, 4*4, e8, m1, ta, ma >+ vwsubu.vx v2, v0, t2 > addi t1, t1, 512 > srai t1, t1, 10 >- vsetivli zero, 4*4, e16, m2, ta, ma >- vzext.vf2 v2, v0 >- vadd.vx v2, v2, t1 >- vmax.vx v2, v2, zero >- vsetvli zero, zero, e8, m1, ta, ma >- vnclipu.wi v0, v2, 0 >+ vwadd.wx v2, v2, t1
Hmm, this should not work, as t1 has more than 8 bits. Maybe checkasm is sloppy here. >+ vnclip.wi v0, v2, 0 >+ vxor.vx v0, v0, t2 > vsetivli zero, 4, e8, mf4, ta, ma > vsse32.v v0, (a0), a1 > _______________________________________________ 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".
