Add Store3 to Sk2f

Bug: skia:
Change-Id: I0377e6a1dd8259e944f7902a5c68af524fa588c7
Reviewed-on: https://skia-review.googlesource.com/79382
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
diff --git a/tests/SkNxTest.cpp b/tests/SkNxTest.cpp
index 069f1bc..349ffb6 100644
--- a/tests/SkNxTest.cpp
+++ b/tests/SkNxTest.cpp
@@ -423,3 +423,17 @@
     REPORTER_ASSERT(r, y[2] == 5);
     REPORTER_ASSERT(r, y[3] == 7);
 }
+
+DEF_TEST(Sk2f_Store3, r) {
+    Sk2f p0{0, 3};
+    Sk2f p1{1, 4};
+    Sk2f p2{2, 5};
+    float dst[6];
+    Sk2f::Store3(dst, p0, p1, p2);
+    REPORTER_ASSERT(r, dst[0] == 0);
+    REPORTER_ASSERT(r, dst[1] == 1);
+    REPORTER_ASSERT(r, dst[2] == 2);
+    REPORTER_ASSERT(r, dst[3] == 3);
+    REPORTER_ASSERT(r, dst[4] == 4);
+    REPORTER_ASSERT(r, dst[5] == 5);
+}