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)
Showing the changes to libavcodec (2 of 2 files). Show all
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| @@ -36,7 +36,8 @@ av_cold void ff_lpc_init_riscv(LPCContext *c) · 35 unmodified lines | ||
| 36 | 36 | if ((flags & AV_CPU_FLAG_RVV_F64) && (flags & AV_CPU_FLAG_RVB_ADDR)) { |
| 37 | 37 | c->lpc_apply_welch_window = ff_lpc_apply_welch_window_rvv; |
| 38 | 38 | |
| 39 | − if (ff_get_rv_vlenb() > c->max_order) | |
| 39 | + if ((flags & AV_CPU_FLAG_RVB_BASIC) && | |
| 40 | + ff_get_rv_vlenb() > c->max_order) | |
| 40 | 41 | c->lpc_compute_autocorr = ff_lpc_compute_autocorr_rvv; |
| 41 | 42 | } |
| 42 | 43 | #endif |
| @@ -86,10 +86,11 @@ func ff_lpc_apply_welch_window_rvv, zve64d · 85 unmodified lines | ||
| 86 | 86 | ret |
| 87 | 87 | endfunc |
| 88 | 88 | |
| 89 | −func ff_lpc_compute_autocorr_rvv, zve64d | |
| 89 | +func ff_lpc_compute_autocorr_rvv, zve64d, zbb | |
| 90 | 90 | addi a2, a2, 1 |
| 91 | + vtype_vli t1, a2, t2, e64, ta, ma | |
| 91 | 92 | li t0, 1 |
| 92 | − vsetvli zero, a2, e64, m8, ta, ma | |
| 93 | + vsetvl zero, a2, t1 | |
| 93 | 94 | fcvt.d.l ft0, t0 |
| 94 | 95 | vle64.v v0, (a0) |
| 95 | 96 | sh3add a0, a2, a0 # data += lag |