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lavc/takdsp: R-V V decorrelate_sm 

C908:
decorrelate_sm_c: 130.0
decorrelate_sm_rvv_i32: 43.2

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>
(with minor changes)
This commit is contained in:
sunyuechi 2023-12-18 22:53:39 +08:00 committed by Rémi Denis-Courmont
parent 0c6203c97a
commit 3d39b8d4e7
2 changed files with 20 additions and 0 deletions
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2
libavcodec/riscv/takdsp_init.c
View File

@ -27,6 +27,7 @@
void ff_decorrelate_ls_rvv(const int32_t *p1, int32_t *p2, int length);
void ff_decorrelate_sr_rvv(int32_t *p1, const int32_t *p2, int length);
void ff_decorrelate_sm_rvv(int32_t *p1, int32_t *p2, int length);
av_cold void ff_takdsp_init_riscv(TAKDSPContext *dsp)
{
@ -36,6 +37,7 @@ av_cold void ff_takdsp_init_riscv(TAKDSPContext *dsp)
if ((flags & AV_CPU_FLAG_RVV_I32) && (flags & AV_CPU_FLAG_RVB_ADDR)) {
dsp->decorrelate_ls = ff_decorrelate_ls_rvv;
dsp->decorrelate_sr = ff_decorrelate_sr_rvv;
dsp->decorrelate_sm = ff_decorrelate_sm_rvv;
}
#endif
}

18
libavcodec/riscv/takdsp_rvv.S
View File

@ -47,3 +47,21 @@ func ff_decorrelate_sr_rvv, zve32x
bnez a2, 1b
ret
endfunc
func ff_decorrelate_sm_rvv, zve32x
1:
vsetvli t0, a2, e32, m8, ta, ma
vle32.v v8, (a1)
sub a2, a2, t0
vle32.v v0, (a0)
vsra.vi v16, v8, 1
vsub.vv v0, v0, v16
vse32.v v0, (a0)
sh2add a0, t0, a0
vadd.vv v8, v0, v8
vse32.v v8, (a1)
sh2add a1, t0, a1
bnez a2, 1b
ret
endfunc