[FFmpeg-cvslog] lavc/sbrdsp: R-V V neg_odd_64
Rémi Denis-Courmont
git at videolan.org
Wed Nov 1 22:54:02 EET 2023
ffmpeg | branch: master | Rémi Denis-Courmont <remi at remlab.net> | Sun Oct 29 18:22:08 2023 +0200| [d06fd18f8f4c6a81ef94cbb600620d83ad51269d] | committer: Rémi Denis-Courmont
lavc/sbrdsp: R-V V neg_odd_64
With 128-bit vectors, this is mostly pointless but also harmless.
Performance gains should be more noticeable with larger vector sizes.
neg_odd_64_c: 76.2
neg_odd_64_rvv_i64: 74.7
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d06fd18f8f4c6a81ef94cbb600620d83ad51269d
---
libavcodec/riscv/sbrdsp_init.c | 5 +++++
libavcodec/riscv/sbrdsp_rvv.S | 17 +++++++++++++++++
2 files changed, 22 insertions(+)
diff --git a/libavcodec/riscv/sbrdsp_init.c b/libavcodec/riscv/sbrdsp_init.c
index e0e62278b0..1b85b2cae9 100644
--- a/libavcodec/riscv/sbrdsp_init.c
+++ b/libavcodec/riscv/sbrdsp_init.c
@@ -25,6 +25,7 @@
void ff_sbr_sum64x5_rvv(float *z);
float ff_sbr_sum_square_rvv(float (*x)[2], int n);
+void ff_sbr_neg_odd_64_rvv(float *x);
av_cold void ff_sbrdsp_init_riscv(SBRDSPContext *c)
{
@@ -35,5 +36,9 @@ av_cold void ff_sbrdsp_init_riscv(SBRDSPContext *c)
c->sum64x5 = ff_sbr_sum64x5_rvv;
c->sum_square = ff_sbr_sum_square_rvv;
}
+#if __riscv_xlen >= 64
+ if ((flags & AV_CPU_FLAG_RVV_I64) && (flags & AV_CPU_FLAG_RVB_ADDR))
+ c->neg_odd_64 = ff_sbr_neg_odd_64_rvv;
+#endif
#endif
}
diff --git a/libavcodec/riscv/sbrdsp_rvv.S b/libavcodec/riscv/sbrdsp_rvv.S
index 4684630953..b510190b15 100644
--- a/libavcodec/riscv/sbrdsp_rvv.S
+++ b/libavcodec/riscv/sbrdsp_rvv.S
@@ -67,3 +67,20 @@ func ff_sbr_sum_square_rvv, zve32f
NOHWF fmv.x.w a0, fa0
ret
endfunc
+
+#if __riscv_xlen >= 64
+func ff_sbr_neg_odd_64_rvv, zve64x
+ li a1, 32
+ li t1, 1 << 63
+1:
+ vsetvli t0, a1, e64, m8, ta, ma
+ vle64.v v8, (a0)
+ sub a1, a1, t0
+ vxor.vx v8, v8, t1
+ vse64.v v8, (a0)
+ sh3add a0, t0, a0
+ bnez t0, 1b
+
+ ret
+endfunc
+#endif
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