From aec115a7179f23642c2b1c1a1cae3253a40c38fc Mon Sep 17 00:00:00 2001
From: sunyuechi <sunyue...@iscas.ac.cn>
Date: Wed, 31 Jan 2024 19:04:11 +0800
Subject: [PATCH 4/4] lavc/rv34dsp: R-V V rv34_idct_dc_add
C908:
rv34_idct_dc_add_c: 134.7
rv34_idct_dc_add_rvv_i32: 45.5
---
libavcodec/riscv/rv34dsp_init.c | 2 ++
libavcodec/riscv/rv34dsp_rvv.S | 20 ++++++++++++++++++++
2 files changed, 22 insertions(+)
diff --git a/libavcodec/riscv/rv34dsp_init.c b/libavcodec/riscv/rv34dsp_init.c
index 852c8ad9a8..7dcadc7e43 100644
--- a/libavcodec/riscv/rv34dsp_init.c
+++ b/libavcodec/riscv/rv34dsp_init.c
@@ -26,6 +26,7 @@
#include "libavcodec/rv34dsp.h"
void ff_rv34_inv_transform_dc_rvv(int16_t *block);
+void ff_rv34_idct_dc_add_rvv(uint8_t *dst, ptrdiff_t stride, int dc);
av_cold void ff_rv34dsp_init_riscv(RV34DSPContext *c)
{
@@ -34,6 +35,7 @@ av_cold void ff_rv34dsp_init_riscv(RV34DSPContext *c)
if (flags & AV_CPU_FLAG_RVV_I32 && ff_get_rv_vlenb() >= 16) {
c->rv34_inv_transform_dc = ff_rv34_inv_transform_dc_rvv;
+ c->rv34_idct_dc_add = ff_rv34_idct_dc_add_rvv;
}
#endif
}
diff --git a/libavcodec/riscv/rv34dsp_rvv.S b/libavcodec/riscv/rv34dsp_rvv.S
index acf5b0c3e8..c73b9c4555 100644
--- a/libavcodec/riscv/rv34dsp_rvv.S
+++ b/libavcodec/riscv/rv34dsp_rvv.S
@@ -36,3 +36,23 @@ func ff_rv34_inv_transform_dc_rvv, zve32x
ret
endfunc
+
+func ff_rv34_idct_dc_add_rvv, zve32x
+ vsetivli zero, 4, e8, mf4, ta, ma
+ vlse32.v v0, (a0), a1
+ li t1, 169
+ mulw t1, t1, a2
+ li a2, 255
+ addiw t1, t1, 512
+ sraiw t1, t1, 10
+ vsetivli zero, 4*4, e16, m2, ta, ma
+ vzext.vf2 v2, v0
+ vadd.vx v2, v2, t1
+ vmax.vx v2, v2, zero
+ vsetvli zero, zero, e8, m1, ta, ma
+ vnclipu.wi v0, v2, 0
+ vsetivli zero, 4, e8, mf4, ta, ma
+ vsse32.v v0, (a0), a1
+
+ ret
+endfunc
--
2.43.0
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