[FFmpeg-devel] [PATCH 02/10] lavc/vp8dsp: R-V V put_bilin_h

[uk7b@foxmail.com]

From: sunyuechi <sunyuechi@iscas.ac.cn>

C908:
vp8_put_bilin4_h_c: 373.5
vp8_put_bilin4_h_rvv_i32: 158.7
vp8_put_bilin8_h_c: 1437.7
vp8_put_bilin8_h_rvv_i32: 318.7
vp8_put_bilin16_h_c: 2845.7
vp8_put_bilin16_h_rvv_i32: 374.7
---
 libavcodec/riscv/vp8dsp_init.c | 14 +++++++++++
 libavcodec/riscv/vp8dsp_rvv.S  | 45 ++++++++++++++++++++++++++++++++++
 2 files changed, 59 insertions(+)

diff --git a/libavcodec/riscv/vp8dsp_init.c b/libavcodec/riscv/vp8dsp_init.c
index fa3feeacf7..778d5ceb29 100644
--- a/libavcodec/riscv/vp8dsp_init.c
+++ b/libavcodec/riscv/vp8dsp_init.c
@@ -34,6 +34,10 @@ VP8_EPEL(16, rvi);
 VP8_EPEL(8,  rvi);
 VP8_EPEL(4,  rvi);
 
+VP8_BILIN(16, rvv);
+VP8_BILIN(8,  rvv);
+VP8_BILIN(4,  rvv);
+
 av_cold void ff_vp78dsp_init_riscv(VP8DSPContext *c)
 {
 #if HAVE_RV
@@ -48,6 +52,16 @@ av_cold void ff_vp78dsp_init_riscv(VP8DSPContext *c)
         c->put_vp8_epel_pixels_tab[2][0][0] = ff_put_vp8_pixels4_rvi;
         c->put_vp8_bilinear_pixels_tab[2][0][0] = ff_put_vp8_pixels4_rvi;
     }
+#if HAVE_RVV
+    if (flags & AV_CPU_FLAG_RVV_I32 && ff_get_rv_vlenb() >= 16) {
+        c->put_vp8_bilinear_pixels_tab[0][0][1] = ff_put_vp8_bilin16_h_rvv;
+        c->put_vp8_bilinear_pixels_tab[0][0][2] = ff_put_vp8_bilin16_h_rvv;
+        c->put_vp8_bilinear_pixels_tab[1][0][1] = ff_put_vp8_bilin8_h_rvv;
+        c->put_vp8_bilinear_pixels_tab[1][0][2] = ff_put_vp8_bilin8_h_rvv;
+        c->put_vp8_bilinear_pixels_tab[2][0][1] = ff_put_vp8_bilin4_h_rvv;
+        c->put_vp8_bilinear_pixels_tab[2][0][2] = ff_put_vp8_bilin4_h_rvv;
+    }
+#endif
 #endif
 }
 
diff --git a/libavcodec/riscv/vp8dsp_rvv.S b/libavcodec/riscv/vp8dsp_rvv.S
index 8a0773f964..760d9d3871 100644
--- a/libavcodec/riscv/vp8dsp_rvv.S
+++ b/libavcodec/riscv/vp8dsp_rvv.S
@@ -20,6 +20,18 @@
 
 #include "libavutil/riscv/asm.S"
 
+.macro vsetvlstatic8 len
+.if \len <= 4
+        vsetivli        zero, \len, e8, mf4, ta, ma
+.elseif \len <= 8
+        vsetivli        zero, \len, e8, mf2, ta, ma
+.elseif \len <= 16
+        vsetivli        zero, \len, e8, m1, ta, ma
+.elseif \len <= 31
+        vsetivli        zero, \len, e8, m2, ta, ma
+.endif
+.endm
+
 .macro vp8_idct_dc_add
         vlse32.v      v0, (a0), a2
         lh            a5, 0(a1)
@@ -71,3 +83,36 @@ func ff_vp8_idct_dc_add4uv_rvv, zve32x
 
         ret
 endfunc
+
+.macro bilin_h_load dst len
+        vsetvlstatic8   \len + 1
+        vle8.v          \dst, (a2)
+        vslide1down.vx  v2, \dst, t5
+        vsetvlstatic8   \len
+        vwmulu.vx       v28, \dst, t1
+        vwmaccu.vx      v28, a5, v2
+        vwaddu.wx       v24, v28, t4
+        vnsra.wi        \dst, v24, 3
+.endm
+
+.macro put_vp8_bilin_h len
+func ff_put_vp8_bilin\len\()_h_rvv, zve32x
+        li              t1, 8
+        li              t4, 4
+        li              t5, 1
+        sub             t1, t1, a5
+1:
+        addi            a4, a4, -1
+        bilin_h_load    v0, \len
+        vse8.v          v0, (a0)
+        add             a2, a2, a3
+        add             a0, a0, a1
+        bnez            a4, 1b
+
+        ret
+endfunc
+.endm
+
+.irp len 16,8,4
+put_vp8_bilin_h \len
+.endr
-- 
2.45.0

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