From 8c5fdbfea42e9ad6ba6e1df5e4ea3c583d59537a Mon Sep 17 00:00:00 2001
From: sunyuechi <sunyue...@iscas.ac.cn>
Date: Tue, 16 Jan 2024 23:57:53 +0800
Subject: [PATCH 3/3] lavc/h264pred: R-V V pred16x16_dc_8
C908
pred16x16_dc_8_c: 2.5
pred16x16_dc_8_rvv_i32: 1.7
---
libavcodec/riscv/h264pred_init.c | 2 ++
libavcodec/riscv/h264pred_rvv.S | 28 ++++++++++++++++++++++++++++
2 files changed, 30 insertions(+)
diff --git a/libavcodec/riscv/h264pred_init.c b/libavcodec/riscv/h264pred_init.c
index 8665bc729e..e8d5b7dd8f 100644
--- a/libavcodec/riscv/h264pred_init.c
+++ b/libavcodec/riscv/h264pred_init.c
@@ -26,6 +26,7 @@
void ff_pred16x16_vertical_8_rvv(uint8_t *src, ptrdiff_t stride);
void ff_pred16x16_horizontal_8_rvv(uint8_t *src, ptrdiff_t stride);
+void ff_pred16x16_dc_8_rvv(uint8_t *src, ptrdiff_t stride);
av_cold void ff_h264_pred_init_riscv(H264PredContext *h, int codec_id,
const int bit_depth,
@@ -38,6 +39,7 @@ av_cold void ff_h264_pred_init_riscv(H264PredContext *h, int codec_id,
if (flags & AV_CPU_FLAG_RVV_I32) {
h->pred16x16[VERT_PRED8x8] = ff_pred16x16_vertical_8_rvv;
h->pred16x16[HOR_PRED8x8] = ff_pred16x16_horizontal_8_rvv;
+ h->pred16x16[DC_PRED8x8] = ff_pred16x16_dc_8_rvv;
}
#endif
}
diff --git a/libavcodec/riscv/h264pred_rvv.S b/libavcodec/riscv/h264pred_rvv.S
index ba1e9045e1..1492991ef4 100644
--- a/libavcodec/riscv/h264pred_rvv.S
+++ b/libavcodec/riscv/h264pred_rvv.S
@@ -48,3 +48,31 @@ func ff_pred16x16_horizontal_8_rvv, zve32x
ret
endfunc
+
+func ff_pred16x16_dc_8_rvv, zve32x
+ vsetivli zero, 1, e16, m1, ta, ma
+ vmv.v.x v16, zero
+
+ vsetivli zero, 16, e8, m1, ta, ma
+ sub t2, a0, a1
+ vle8.v v8, (t2)
+ vwredsumu.vs v16, v8, v16
+ addi t2, a0, -1
+ vlse8.v v8, (t2), a1
+ vwredsumu.vs v16, v8, v16
+ vsetivli zero, 1, e16, m1, ta, ma
+ vmv.x.s t1, v16
+ addi t1, t1, 16
+ srai t1, t1, 5
+ vsetivli zero, 16, e8, m1, ta, ma
+ vmv.v.x v0, t1
+ vsetivli zero, 4, e8, mf4, ta, ma
+ li t0, 16
+1:
+ vse32.v v0, (a0)
+ addi t0, t0, -1
+ add a0, a0, a1
+ bnez t0, 1b
+
+ ret
+endfunc
--
2.43.0
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