[FFmpeg-devel] [PATCH 1/3] lavc/vc1dsp: factor R-V V inv_trans_8 code
Rémi Denis-Courmont
remi at remlab.net
Thu Jun 27 22:04:33 EEST 2024
---
libavcodec/riscv/vc1dsp_rvv.S | 64 +++++++++++++----------------------
1 file changed, 23 insertions(+), 41 deletions(-)
diff --git a/libavcodec/riscv/vc1dsp_rvv.S b/libavcodec/riscv/vc1dsp_rvv.S
index 7e1fb84b0c..b3a1f55ab9 100644
--- a/libavcodec/riscv/vc1dsp_rvv.S
+++ b/libavcodec/riscv/vc1dsp_rvv.S
@@ -165,6 +165,7 @@ func ff_vc1_inv_trans_8_rvv, zve32x
vsll.vi v23, v7, 4
vsub.vv v20, v20, v21
vsub.vv v22, v22, v23
+ srli t2, t1, 2
vadd.vv v0, v28, v16
vadd.vv v19, v20, v22 # t4
vadd.vv v1, v29, v17
@@ -174,6 +175,14 @@ func ff_vc1_inv_trans_8_rvv, zve32x
vsub.vv v5, v30, v18
vsub.vv v6, v29, v17
vsub.vv v7, v28, v16
+ beqz t2, 1f # faster than 4x add t2=zero
+ .irp n,4,5,6,7
+ vadd.vi v\n, v\n, 1
+ .endr
+1:
+ .irp n,0,1,2,3,4,5,6,7
+ vssra.vx v\n, v\n, t1
+ .endr
jr t0
endfunc
@@ -220,35 +229,22 @@ func ff_vc1_inv_trans_8x8_rvv, zve32x
addi a7, a0, 7 * 8 * 2
vle16.v v6, (a6)
vle16.v v7, (a7)
+ li t1, 3
jal t0, ff_vc1_inv_trans_8_rvv
- .irp n,0,1,2,3,4,5,6,7
- vssra.vi v\n, v\n, 3
- .endr
vsseg8e16.v v0, (a0)
.irp n,0,1,2,3,4,5,6,7
vle16.v v\n, (a\n)
.endr
+ li t1, 7
jal t0, ff_vc1_inv_trans_8_rvv
- vadd.vi v4, v4, 1
- vadd.vi v5, v5, 1
- vssra.vi v4, v4, 7
- vssra.vi v5, v5, 7
- vse16.v v4, (a4)
- vadd.vi v6, v6, 1
- vse16.v v5, (a5)
- vadd.vi v7, v7, 1
- vssra.vi v6, v6, 7
- vssra.vi v7, v7, 7
- vse16.v v6, (a6)
- vssra.vi v0, v0, 7
- vse16.v v7, (a7)
- vssra.vi v1, v1, 7
vse16.v v0, (a0)
- vssra.vi v2, v2, 7
vse16.v v1, (a1)
- vssra.vi v3, v3, 7
vse16.v v2, (a2)
vse16.v v3, (a3)
+ vse16.v v4, (a4)
+ vse16.v v5, (a5)
+ vse16.v v6, (a6)
+ vse16.v v7, (a7)
ret
endfunc
@@ -256,10 +252,8 @@ func ff_vc1_inv_trans_8x4_rvv, zve32x
csrwi vxrm, 0
vsetivli zero, 4, e16, mf2, ta, ma
vlseg8e16.v v0, (a2)
+ li t1, 3
jal t0, ff_vc1_inv_trans_8_rvv
- .irp n,0,1,2,3,4,5,6,7
- vssra.vi v\n, v\n, 3
- .endr
vsseg8e16.v v0, (a2)
addi a3, a2, 1 * 8 * 2
vsetivli zero, 8, e16, m1, ta, ma
@@ -323,33 +317,21 @@ func ff_vc1_inv_trans_4x8_rvv, zve32x
addi t1, a2, 7 * 8 * 2
vle16.v v6, (t6)
vle16.v v7, (t1)
-
+ li t1, 7
jal t0, ff_vc1_inv_trans_8_rvv
- vadd.vi v4, v4, 1
add t0, a1, a0
- vadd.vi v5, v5, 1
- vadd.vi v6, v6, 1
- add t1, a1, t0
- vadd.vi v7, v7, 1
- vssra.vi v0, v0, 7
- add t2, a1, t1
- vssra.vi v1, v1, 7
- vssra.vi v2, v2, 7
- add t3, a1, t2
- vssra.vi v3, v3, 7
- vssra.vi v4, v4, 7
- add t4, a1, t3
- vssra.vi v5, v5, 7
- vssra.vi v6, v6, 7
- add t5, a1, t4
- vssra.vi v7, v7, 7
vle8.v v8, (a0)
- add t6, a1, t5
+ add t1, a1, t0
vle8.v v9, (t0)
+ add t2, a1, t1
vle8.v v10, (t1)
+ add t3, a1, t2
vle8.v v11, (t2)
+ add t4, a1, t3
vle8.v v12, (t3)
+ add t5, a1, t4
vle8.v v13, (t4)
+ add t6, a1, t5
vle8.v v14, (t5)
vle8.v v15, (t6)
vsetvli zero, zero, e8, mf4, ta, ma
--
2.45.2
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