C908:
decorrelate_sm_c: 130.0
decorrelate_sm_rvv_i32: 43.7
From 3dc613feaa6c38a7df47a3fc385e2140716e0ae2 Mon Sep 17 00:00:00 2001
From: sunyuechi <sunyue...@iscas.ac.cn>
Date: Mon, 18 Dec 2023 22:53:39 +0800
Subject: [PATCH 6/6] lavc/takdsp: R-V V decorrelate_sm
C908:
decorrelate_sm_c: 130.0
decorrelate_sm_rvv_i32: 43.7
---
libavcodec/riscv/takdsp_init.c | 2 ++
libavcodec/riscv/takdsp_rvv.S | 17 +++++++++++++++++
2 files changed, 19 insertions(+)
diff --git a/libavcodec/riscv/takdsp_init.c b/libavcodec/riscv/takdsp_init.c
index 0b4ec18086..85634d6db6 100644
--- a/libavcodec/riscv/takdsp_init.c
+++ b/libavcodec/riscv/takdsp_init.c
@@ -27,6 +27,7 @@
void ff_decorrelate_ls_rvv(int32_t *p1, int32_t *p2, int length);
void ff_decorrelate_sr_rvv(int32_t *p1, int32_t *p2, int length);
+void ff_decorrelate_sm_rvv(int32_t *p1, int32_t *p2, int length);
av_cold void ff_takdsp_init_riscv(TAKDSPContext *dsp)
{
@@ -36,6 +37,7 @@ av_cold void ff_takdsp_init_riscv(TAKDSPContext *dsp)
if ((flags & AV_CPU_FLAG_RVV_I32) && (flags & AV_CPU_FLAG_RVB_ADDR)) {
dsp->decorrelate_ls = ff_decorrelate_ls_rvv;
dsp->decorrelate_sr = ff_decorrelate_sr_rvv;
+ dsp->decorrelate_sm = ff_decorrelate_sm_rvv;
}
#endif
}
diff --git a/libavcodec/riscv/takdsp_rvv.S b/libavcodec/riscv/takdsp_rvv.S
index 65c79e1aa9..816e765039 100644
--- a/libavcodec/riscv/takdsp_rvv.S
+++ b/libavcodec/riscv/takdsp_rvv.S
@@ -47,3 +47,20 @@ func ff_decorrelate_sr_rvv, zve32x
bnez a2, 1b
ret
endfunc
+
+func ff_decorrelate_sm_rvv, zve32x
+1:
+ vsetvli t0, a2, e32, m8, ta, ma
+ vle32.v v0, (a0)
+ sub a2, a2, t0
+ vle32.v v8, (a1)
+ vsra.vi v16, v8, 1
+ vsub.vv v0, v0, v16
+ vse32.v v0, (a0)
+ sh2add a0, t0, a0
+ vadd.vv v0, v0, v8
+ vse32.v v0, (a1)
+ sh2add a1, t0, a1
+ bnez a2, 1b
+ ret
+endfunc
--
2.43.0
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