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lavc/flacdsp: R-V V flac_wasted33 

T-Head C908:
flac_wasted_33_c:       786.2
flac_wasted_33_rvv_i64: 486.5
This commit is contained in:
Rémi Denis-Courmont 2024-05-12 20:02:03 +03:00
parent 784672b833
commit 88d973a5d6
2 changed files with 36 additions and 0 deletions
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4
libavcodec/riscv/flacdsp_init.c
View File

@ -32,6 +32,7 @@ void ff_flac_lpc32_rvv(int32_t *decoded, const int coeffs[32],
void ff_flac_lpc32_rvv_simple(int32_t *decoded, const int coeffs[32],
int pred_order, int qlevel, int len);
void ff_flac_wasted32_rvv(int32_t *, int shift, int len);
void ff_flac_wasted33_rvv(int64_t *, const int32_t *, int shift, int len);
void ff_flac_decorrelate_indep2_16_rvv(uint8_t **out, int32_t **in,
int channels, int len, int shift);
void ff_flac_decorrelate_indep4_16_rvv(uint8_t **out, int32_t **in,
@ -84,6 +85,9 @@ av_cold void ff_flacdsp_init_riscv(FLACDSPContext *c, enum AVSampleFormat fmt,
c->wasted32 = ff_flac_wasted32_rvv;
if (flags & AV_CPU_FLAG_RVV_I64)
c->wasted33 = ff_flac_wasted33_rvv;
# if (__riscv_xlen >= 64)
switch (fmt) {
case AV_SAMPLE_FMT_S16:

32
libavcodec/riscv/flacdsp_rvv.S
View File

@ -115,6 +115,38 @@ func ff_flac_wasted32_rvv, zve32x
ret
endfunc
func ff_flac_wasted33_rvv, zve64x
srli t0, a2, 5
li t1, 1
bnez t0, 2f
sll a2, t1, a2
1:
vsetvli t0, a3, e32, m4, ta, ma
vle32.v v8, (a1)
sub a3, a3, t0
vwmulsu.vx v16, v8, a2
sh2add a1, t0, a1
vse64.v v16, (a0)
sh3add a0, t0, a0
bnez a3, 1b
ret
2: // Pessimistic case: wasted >= 32
vsetvli t0, a3, e32, m4, ta, ma
vle32.v v8, (a1)
sub a3, a3, t0
vwcvtu.x.x.v v16, v8
sh2add a1, t0, a1
vsetvli zero, zero, e64, m8, ta, ma
vsll.vx v16, v16, a2
vse64.v v16, (a0)
sh3add a0, t0, a0
bnez a3, 2b
ret
endfunc
#if (__riscv_xlen == 64)
func ff_flac_decorrelate_indep2_16_rvv, zve32x
ld a0, (a0)