From: Rémi Denis-Courmont <r...@remlab.net>
---
libavutil/riscv/float_dsp_init.c | 2 ++
libavutil/riscv/float_dsp_rvv.S | 21 +++++++++++++++++++++
2 files changed, 23 insertions(+)
diff --git a/libavutil/riscv/float_dsp_init.c b/libavutil/riscv/float_dsp_init.c
index dacd81c08b..cc9b7e83dc 100644
--- a/libavutil/riscv/float_dsp_init.c
+++ b/libavutil/riscv/float_dsp_init.c
@@ -38,6 +38,7 @@ void ff_vector_fmul_add_rvv(float *dst, const float *src0,
const float *src1,
void ff_vector_fmul_reverse_rvv(float *dst, const float *src0,
const float *src1, int len);
void ff_butterflies_float_rvv(float *v1, float *v2, int len);
+float ff_scalarproduct_float_rvv(const float *v1, const float *v2, int len);
void ff_vector_dmul_rvv(double *dst, const double *src0, const double *src1,
int len);
@@ -59,6 +60,7 @@ av_cold void ff_float_dsp_init_riscv(AVFloatDSPContext *fdsp)
fdsp->vector_fmul_add = ff_vector_fmul_add_rvv;
fdsp->vector_fmul_reverse = ff_vector_fmul_reverse_rvv;
fdsp->butterflies_float = ff_butterflies_float_rvv;
+ fdsp->scalarproduct_float = ff_scalarproduct_float_rvv;
if (flags & AV_CPU_FLAG_RV_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 84f675970c..48a44b8150 100644
--- a/libavutil/riscv/float_dsp_rvv.S
+++ b/libavutil/riscv/float_dsp_rvv.S
@@ -172,6 +172,27 @@ func ff_butterflies_float_rvv, zve32f
ret
endfunc
+// a0 = (a0).(a1) [0..a2-1]
+func ff_scalarproduct_float_rvv, zve32f
+ vsetvli zero, zero, e32, m1, ta, ma
+ vmv.s.x v8, zero
+1:
+ vsetvli t0, a2, e32, m1, ta, ma
+ slli t1, t0, 2
+ vle32.v v16, (a0)
+ add a0, a0, t1
+ vle32.v v24, (a1)
+ add a1, a1, t1
+ vfmul.vv v16, v16, v24
+ sub a2, a2, t0
+ vfredusum.vs v8, v16, v8
+ bnez a2, 1b
+
+ vfmv.f.s fa0, v8
+NOHWF fmv.x.w a0, fa0
+ ret
+endfunc
+
// (a0) = (a1) * (a2) [0..a3-1]
func ff_vector_dmul_rvv, zve64d
1:
--
2.37.2
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