Add Sk4f_RoundToInt

src/core/SkNx.h

Index: src/core/SkNx.h
diff --git a/src/core/SkNx.h b/src/core/SkNx.h
index d0c7f41f1cd1b4b3b8a7e64b4b8fc9a4c6d43408..40c1ac69ce295b0122f265286150f8331bca43f4 100644
--- a/src/core/SkNx.h
+++ b/src/core/SkNx.h
@@ -299,6 +299,15 @@ typedef SkNx<4,       int> Sk4i;
     #include "../opts/SkNx_sse.h"
 #elif !defined(SKNX_NO_SIMD) && defined(SK_ARM_HAS_NEON)
     #include "../opts/SkNx_neon.h"
+#else
+
+SI Sk4i Sk4f_round(const Sk4f& x) {
+    return { (int) lrintf (x[0]),
+             (int) lrintf (x[1]),
+             (int) lrintf (x[2]),
+             (int) lrintf (x[3]), };
+}
+
 #endif
 
 SI void Sk4f_ToBytes(uint8_t p[16], const Sk4f& a, const Sk4f& b, const Sk4f& c, const Sk4f& d) {