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| author | Rémi Denis-Courmont <remi@remlab.net> | 2024-05-26 08:25:16 +0300 |
|---|---|---|
| committer | Rémi Denis-Courmont <remi@remlab.net> | 2024-05-29 16:57:02 +0300 |
| commit | c53d42380d3f57c318fa76329c8fdcb47a05093a (patch) | |
| tree | 638dc4c396e77614fe6d14f4991987e63bbadae0 | |
| parent | d82c5035558730f0d1f2e5aec66df6d0db7f4e6f (diff) | |
| download | ffmpeg-c53d42380d3f57c318fa76329c8fdcb47a05093a.tar.gz | |
lavc/lpc: optimise RVV vector type for compute_autocorr
On SpacemiT X60 (with len == 4000):
autocorr_10_c: 2303.7
autocorr_10_rvv_f64: 1411.5 (before)
autocorr_10_rvv_f64: 842.2 (after)
| -rw-r--r-- | libavcodec/riscv/lpc_init.c | 3 | ||||
| -rw-r--r-- | libavcodec/riscv/lpc_rvv.S | 5 |
2 files changed, 5 insertions, 3 deletions
diff --git a/libavcodec/riscv/lpc_init.c b/libavcodec/riscv/lpc_init.c index 08efae4da7..d9bcbbe604 100644 --- a/libavcodec/riscv/lpc_init.c +++ b/libavcodec/riscv/lpc_init.c @@ -36,7 +36,8 @@ av_cold void ff_lpc_init_riscv(LPCContext *c) if ((flags & AV_CPU_FLAG_RVV_F64) && (flags & AV_CPU_FLAG_RVB_ADDR)) { c->lpc_apply_welch_window = ff_lpc_apply_welch_window_rvv; - if (ff_get_rv_vlenb() > c->max_order) + if ((flags & AV_CPU_FLAG_RVB_BASIC) && + ff_get_rv_vlenb() > c->max_order) c->lpc_compute_autocorr = ff_lpc_compute_autocorr_rvv; } #endif diff --git a/libavcodec/riscv/lpc_rvv.S b/libavcodec/riscv/lpc_rvv.S index 3fdf80ebed..8cf79963f1 100644 --- a/libavcodec/riscv/lpc_rvv.S +++ b/libavcodec/riscv/lpc_rvv.S @@ -86,10 +86,11 @@ func ff_lpc_apply_welch_window_rvv, zve64d ret endfunc -func ff_lpc_compute_autocorr_rvv, zve64d +func ff_lpc_compute_autocorr_rvv, zve64d, zbb addi a2, a2, 1 + vtype_vli t1, a2, t2, e64, ta, ma li t0, 1 - vsetvli zero, a2, e64, m8, ta, ma + vsetvl zero, a2, t1 fcvt.d.l ft0, t0 vle64.v v0, (a0) sh3add a0, a2, a0 # data += lag |