commit 552571e8b24b2619c39ec176e6cb8e75d3e7fdd3
author Darren Hsieh <darren.hsieh@sifive.com> Wed Jun 07 01:17:43 2023 -0700
committer libyuv LUCI CQ <libyuv-scoped@luci-project-accounts.iam.gserviceaccount.com> Wed Jun 14 00:57:00 2023 +0000
tree f433edd0b4ad45e656937fc6e3d48c3bfec4a3b9
parent 2a5d7e2fbc6735d633d50fb9711ac887e415eae3

[RVV] Enable ScaleRowDown34_RVV & ScaleRowDown34_{0,1}_Box_RVV

Run on SiFive internal FPGA:

Test case                       RVV function			Speedup
I444ScaleDownBy3by4_None	ScaleRowDown34_RVV	        5.8
I444ScaleDownBy3by4_Linear	ScaleRowDown34_0/1_Box_RVV	6.5
I444ScaleDownBy3by4_Bilinear	ScaleRowDown34_0/1_Box_RVV	6.3

Bug: libyuv:956
Change-Id: I8ef221ab14d631e14f1ba1aaa25d2b30d4e710db
Signed-off-by: Darren Hsieh <darren.hsieh@sifive.com>
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/4607777
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
Commit-Queue: Frank Barchard <fbarchard@chromium.org>

source/scale.cc

diff --git a/source/scale.cc b/source/scale.cc
index 1cda223..fe706dd 100644
--- a/source/scale.cc
+++ b/source/scale.cc
@@ -485,6 +485,17 @@
     }
   }
 #endif
+#if defined(HAS_SCALEROWDOWN34_RVV)
+  if (TestCpuFlag(kCpuHasRVV)) {
+    if (!filtering) {
+      ScaleRowDown34_0 = ScaleRowDown34_RVV;
+      ScaleRowDown34_1 = ScaleRowDown34_RVV;
+    } else {
+      ScaleRowDown34_0 = ScaleRowDown34_0_Box_RVV;
+      ScaleRowDown34_1 = ScaleRowDown34_1_Box_RVV;
+    }
+  }
+#endif
 
   for (y = 0; y < dst_height - 2; y += 3) {
     ScaleRowDown34_0(src_ptr, filter_stride, dst_ptr, dst_width);