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lavc/h264dsp: R-V V 8-bit h264_idct8_add

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T-Head C908 (cycles):
h264_idct8_add_8bpp_c:      1072.0
h264_idct8_add_8bpp_rvv_i32: 318.5
release/7.1
Rémi Denis-Courmont 5 months ago
parent ecd3a97834
commit f9d1230224
2 changed files with 135 additions and 1 deletions
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  1. 2
      libavcodec/riscv/h264dsp_init.c
  2. 134
      libavcodec/riscv/h264idct_rvv.S

2
libavcodec/riscv/h264dsp_init.c
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@ -35,6 +35,7 @@ void ff_h264_h_loop_filter_luma_mbaff_8_rvv(uint8_t *pix, ptrdiff_t stride,
int alpha, int beta, int8_t *tc0);
void ff_h264_idct_add_8_rvv(uint8_t *dst, int16_t *block, int stride);
void ff_h264_idct8_add_8_rvv(uint8_t *dst, int16_t *block, int stride);
void ff_h264_idct_add16_8_rvv(uint8_t *dst, const int *blockoffset,
int16_t *block, int stride,
const uint8_t nnzc[5 * 8]);
@ -65,6 +66,7 @@ av_cold void ff_h264dsp_init_riscv(H264DSPContext *dsp, const int bit_depth,
ff_h264_h_loop_filter_luma_mbaff_8_rvv;
dsp->h264_idct_add = ff_h264_idct_add_8_rvv;
dsp->h264_idct8_add = ff_h264_idct8_add_8_rvv;
# if __riscv_xlen == 64
dsp->h264_idct_add16 = ff_h264_idct_add16_8_rvv;
dsp->h264_idct_add16intra = ff_h264_idct_add16intra_8_rvv;

134
libavcodec/riscv/h264idct_rvv.S
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@ -103,6 +103,137 @@ func ff_h264_idct_add_8_rvv, zve32x
ret
endfunc
.variant_cc ff_h264_idct8_rvv
func ff_h264_idct8_rvv, zve32x
vsra.vi v9, v7, 1
vsra.vi v11, v3, 1
vsra.vi v12, v2, 1
vsra.vi v13, v5, 1
vsra.vi v14, v6, 1
vsra.vi v15, v1, 1
vadd.vv v9, v3, v9
vsub.vv v11, v1, v11
vsub.vv v13, v13, v1
vadd.vv v15, v3, v15
vsub.vv v9, v5, v9
vadd.vv v11, v11, v7
vadd.vv v13, v13, v7
vadd.vv v15, v15, v5
vadd.vv v8, v0, v4 # a0
vsub.vv v9, v9, v7 # a1
vsub.vv v10, v0, v4 # a2
vsub.vv v11, v11, v3 # a3
vsub.vv v12, v12, v6 # a4
vadd.vv v13, v13, v5 # a5
vadd.vv v14, v14, v2 # a6
vadd.vv v15, v15, v1 # a7
vsra.vi v7, v9, 2
vsra.vi v5, v11, 2
vsra.vi v3, v13, 2
vsra.vi v1, v15, 2
vadd.vv v0, v8, v14 # b0
vadd.vv v6, v10, v12 # b2
vsub.vv v2, v10, v12 # b4
vsub.vv v4, v8, v14 # b6
vsub.vv v8, v15, v7 # b7
vsub.vv v14, v5, v13 # b5
vadd.vv v12, v1, v9 # b1
vadd.vv v10, v11, v3 # b3
vadd.vv v1, v6, v14
vsub.vv v6, v6, v14
vsub.vv v7, v0, v8
vadd.vv v0, v0, v8
vsub.vv v5, v2, v10
vadd.vv v2, v2, v10
vadd.vv v3, v4, v12
vsub.vv v4, v4, v12
jr t0
endfunc
func ff_h264_idct8_add_8_rvv, zve32x
csrwi vxrm, 0
.Lidct8_add_8_rvv:
vsetivli zero, 8, e16, m1, ta, ma
addi t1, a1, 1 * 8 * 2
vle16.v v0, (a1)
addi t2, a1, 2 * 8 * 2
vle16.v v1, (t1)
addi t3, a1, 3 * 8 * 2
vle16.v v2, (t2)
addi t4, a1, 4 * 8 * 2
vle16.v v3, (t3)
addi t5, a1, 5 * 8 * 2
vle16.v v4, (t4)
addi t6, a1, 6 * 8 * 2
vle16.v v5, (t5)
addi a7, a1, 7 * 8 * 2
vle16.v v6, (t6)
vle16.v v7, (a7)
jal t0, ff_h264_idct8_rvv
vse16.v v0, (a1)
vse16.v v1, (t1)
vse16.v v2, (t2)
vse16.v v3, (t3)
vse16.v v4, (t4)
vse16.v v5, (t5)
vse16.v v6, (t6)
vse16.v v7, (a7)
vlseg8e16.v v0, (a1)
.rept 1024 / __riscv_xlen
sx zero, ((__riscv_xlen / 8) * \+)(a1)
.endr
jal t0, ff_h264_idct8_rvv
add t1, a0, a2
vle8.v v16, (a0)
add t2, t1, a2
vle8.v v17, (t1)
add t3, t2, a2
vle8.v v18, (t2)
add t4, t3, a2
vle8.v v19, (t3)
add t5, t4, a2
vle8.v v20, (t4)
add t6, t5, a2
vle8.v v21, (t5)
add a7, t6, a2
vle8.v v22, (t6)
vle8.v v23, (a7)
.irp n,0,1,2,3,4,5,6,7
vssra.vi v\n, v\n, 6
.endr
vsetvli zero, zero, e8, mf2, ta, ma
vwaddu.wv v0, v0, v16
vwaddu.wv v1, v1, v17
vwaddu.wv v2, v2, v18
vwaddu.wv v3, v3, v19
vwaddu.wv v4, v4, v20
vwaddu.wv v5, v5, v21
vwaddu.wv v6, v6, v22
vwaddu.wv v7, v7, v23
vsetvli zero, zero, e16, m1, ta, ma
.irp n,0,1,2,3,4,5,6,7
vmax.vx v\n, v\n, zero
.endr
vsetvli zero, zero, e8, mf2, ta, ma
vnclipu.wi v16, v0, 0
vnclipu.wi v17, v1, 0
vnclipu.wi v18, v2, 0
vnclipu.wi v19, v3, 0
vnclipu.wi v20, v4, 0
vnclipu.wi v21, v5, 0
vnclipu.wi v22, v6, 0
vnclipu.wi v23, v7, 0
vse8.v v16, (a0)
vse8.v v17, (t1)
vse8.v v18, (t2)
vse8.v v19, (t3)
vse8.v v20, (t4)
vse8.v v21, (t5)
vse8.v v22, (t6)
vse8.v v23, (a7)
ret
endfunc
const ff_h264_scan8
.byte 014, 015, 024, 025, 016, 017, 026, 027
.byte 034, 035, 044, 045, 036, 037, 046, 047
@ -251,6 +382,7 @@ func ff_h264_idct_add16intra_\depth\()_rvv, zve32x
endfunc
func ff_h264_idct8_add4_\depth\()_rvv, zve32x
csrwi vxrm, 0
addi sp, sp, -80
lla t0, ff_h264_scan8
sd s0, (sp)
@ -300,7 +432,7 @@ func ff_h264_idct8_add4_\depth\()_rvv, zve32x
call ff_h264_idct8_dc_add_\depth\()_c
j 3f
2:
call ff_h264_idct8_add_\depth\()_c
call .Lidct8_add_\depth\()_rvv
3:
srli s3, s3, 1
addi s5, s5, 4 * 4

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