[FFmpeg-devel] [PATCH 13/18] lavu/riscv: float vector multiplication-addition with RVV
remi at remlab.net
remi at remlab.net
Fri Sep 9 18:48:54 EEST 2022
From: Rémi Denis-Courmont <remi at remlab.net>
---
libavutil/riscv/float_dsp_init.c | 3 +++
libavutil/riscv/float_dsp_rvv.S | 19 +++++++++++++++++++
2 files changed, 22 insertions(+)
diff --git a/libavutil/riscv/float_dsp_init.c b/libavutil/riscv/float_dsp_init.c
index b63da72acd..9b31ed2ed1 100644
--- a/libavutil/riscv/float_dsp_init.c
+++ b/libavutil/riscv/float_dsp_init.c
@@ -28,6 +28,8 @@ void ff_vector_fmac_scalar_rvv(float *dst, const float *src, float mul,
int len);
void ff_vector_fmul_scalar_rvv(float *dst, const float *src, float mul,
int len);
+void ff_vector_fmul_add_rvv(float *dst, const float *src0, const float *src1,
+ const float *src2, int len);
void ff_vector_dmul_rvv(double *dst, const double *src0, const double *src1,
int len);
@@ -45,6 +47,7 @@ av_cold void ff_float_dsp_init_riscv(AVFloatDSPContext *fdsp)
fdsp->vector_fmul = ff_vector_fmul_rvv;
fdsp->vector_fmac_scalar = ff_vector_fmac_scalar_rvv;
fdsp->vector_fmul_scalar = ff_vector_fmul_scalar_rvv;
+ fdsp->vector_fmul_add = ff_vector_fmul_add_rvv;
if (flags & AV_CPU_FLAG_ZVE64D) {
fdsp->vector_dmul = ff_vector_dmul_rvv;
diff --git a/libavutil/riscv/float_dsp_rvv.S b/libavutil/riscv/float_dsp_rvv.S
index 5a7d92abd6..efbf12179f 100644
--- a/libavutil/riscv/float_dsp_rvv.S
+++ b/libavutil/riscv/float_dsp_rvv.S
@@ -73,6 +73,25 @@ NOHWF mv a2, a3
ret
endfunc
+// (a0) = (a1) * (a2) + (a3) [0..a4-1]
+func ff_vector_fmul_add_rvv, zve32f
+1: vsetvli t0, a4, e32, m8, ta, ma
+ slli t1, t0, 2
+ vle32.v v8, (a1)
+ add a1, a1, t1
+ vle32.v v16, (a2)
+ add a2, a2, t1
+ vle32.v v24, (a3)
+ add a3, a3, t1
+ vfmadd.vv v8, v16, v24
+ sub a4, a4, t0
+ vse32.v v8, (a0)
+ add a0, a0, t1
+ bnez a4, 1b
+
+ ret
+endfunc
+
// (a0) = (a1) * (a2) [0..a3-1]
func ff_vector_dmul_rvv, zve64d
1: vsetvli t0, a3, e64, m8, ta, ma
--
2.37.2
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