[FFmpeg-cvslog] lavu/float_dsp: R-V V scalarproduct_double
Rémi Denis-Courmont
git at videolan.org
Fri May 31 22:26:02 EEST 2024
ffmpeg | branch: master | Rémi Denis-Courmont <remi at remlab.net> | Wed May 29 17:57:09 2024 +0300| [9238f6cb415d5a688e76f804e74ebddfd556bdda] | committer: Rémi Denis-Courmont
lavu/float_dsp: R-V V scalarproduct_double
C908:
scalarproduct_double_c: 39.2
scalarproduct_double_rvv_f64: 10.5
X60:
scalarproduct_double_c: 35.0
scalarproduct_double_rvv_f64: 5.2
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9238f6cb415d5a688e76f804e74ebddfd556bdda
---
libavutil/riscv/float_dsp_init.c | 3 +++
libavutil/riscv/float_dsp_rvv.S | 21 +++++++++++++++++++++
2 files changed, 24 insertions(+)
diff --git a/libavutil/riscv/float_dsp_init.c b/libavutil/riscv/float_dsp_init.c
index 585f237225..155496fa6b 100644
--- a/libavutil/riscv/float_dsp_init.c
+++ b/libavutil/riscv/float_dsp_init.c
@@ -46,6 +46,8 @@ void ff_vector_dmac_scalar_rvv(double *dst, const double *src, double mul,
int len);
void ff_vector_dmul_scalar_rvv(double *dst, const double *src, double mul,
int len);
+double ff_scalarproduct_double_rvv(const double *v1, const double *v2,
+ size_t len);
av_cold void ff_float_dsp_init_riscv(AVFloatDSPContext *fdsp)
{
@@ -68,6 +70,7 @@ av_cold void ff_float_dsp_init_riscv(AVFloatDSPContext *fdsp)
fdsp->vector_dmul = ff_vector_dmul_rvv;
fdsp->vector_dmac_scalar = ff_vector_dmac_scalar_rvv;
fdsp->vector_dmul_scalar = ff_vector_dmul_scalar_rvv;
+ fdsp->scalarproduct_double = ff_scalarproduct_double_rvv;
}
}
#endif
diff --git a/libavutil/riscv/float_dsp_rvv.S b/libavutil/riscv/float_dsp_rvv.S
index e6ec182a7a..2f0ade6db6 100644
--- a/libavutil/riscv/float_dsp_rvv.S
+++ b/libavutil/riscv/float_dsp_rvv.S
@@ -249,3 +249,24 @@ NOHWD mv a2, a3
ret
endfunc
+
+func ff_scalarproduct_double_rvv, zve64f
+ vsetvli t0, zero, e64, m8, ta, ma
+ vmv.v.x v8, zero
+ vmv.s.x v0, zero
+1:
+ vsetvli t0, a2, e64, m8, tu, ma
+ vle64.v v16, (a0)
+ sub a2, a2, t0
+ vle64.v v24, (a1)
+ sh3add a0, t0, a0
+ vfmacc.vv v8, v16, v24
+ sh3add a1, t0, a1
+ bnez a2, 1b
+
+ vsetvli t0, zero, e64, m8, ta, ma
+ vfredusum.vs v0, v8, v0
+ vfmv.f.s fa0, v0
+NOHWD fmv.x.w a0, fa0
+ ret
+endfunc
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