diff --git a/src/core/Sk4x.h b/src/core/Sk4x.h
index d280c1b..f006d70 100644
--- a/src/core/Sk4x.h
+++ b/src/core/Sk4x.h
@@ -52,6 +52,22 @@
     Sk4x multiply(const Sk4x&) const;
     Sk4x   divide(const Sk4x&) const;
 
+    // TODO: why doesn't MSVC like operator~() ?
+    //Sk4x operator ~()              const { return this->bitNot(); }
+    Sk4x operator &(const Sk4x& o) const { return this->bitAnd(o); }
+    Sk4x operator |(const Sk4x& o) const { return this->bitOr (o); }
+    Sk4x operator +(const Sk4x& o) const { return this->add(o); }
+    Sk4x operator -(const Sk4x& o) const { return this->subtract(o); }
+    Sk4x operator *(const Sk4x& o) const { return this->multiply(o); }
+    Sk4x operator /(const Sk4x& o) const { return this->divide(o); }
+
+    Sk4x& operator &=(const Sk4x& o) { return (*this = *this & o); }
+    Sk4x& operator |=(const Sk4x& o) { return (*this = *this | o); }
+    Sk4x& operator +=(const Sk4x& o) { return (*this = *this + o); }
+    Sk4x& operator -=(const Sk4x& o) { return (*this = *this - o); }
+    Sk4x& operator *=(const Sk4x& o) { return (*this = *this * o); }
+    Sk4x& operator /=(const Sk4x& o) { return (*this = *this / o); }
+
     Sk4x rsqrt() const;   // Approximate reciprocal sqrt().
     Sk4x  sqrt() const;   // this->multiply(this->rsqrt()) may be faster, but less precise.
 
@@ -62,6 +78,13 @@
     Sk4i    lessThanEqual(const Sk4x&) const;
     Sk4i greaterThanEqual(const Sk4x&) const;
 
+    Sk4i operator ==(const Sk4x& o) const { return this->equal(o); }
+    Sk4i operator !=(const Sk4x& o) const { return this->notEqual(o); }
+    Sk4i operator  <(const Sk4x& o) const { return this->lessThan(o); }
+    Sk4i operator  >(const Sk4x& o) const { return this->greaterThan(o); }
+    Sk4i operator <=(const Sk4x& o) const { return this->lessThanEqual(o); }
+    Sk4i operator >=(const Sk4x& o) const { return this->greaterThanEqual(o); }
+
     static Sk4x Min(const Sk4x& a, const Sk4x& b);
     static Sk4x Max(const Sk4x& a, const Sk4x& b);
 
diff --git a/tests/PMFloatTest.cpp b/tests/PMFloatTest.cpp
index f370b39..5ce6e42 100644
--- a/tests/PMFloatTest.cpp
+++ b/tests/PMFloatTest.cpp
@@ -24,7 +24,7 @@
 
     // Test SkPMFloat <-> Sk4f conversion.
     Sk4f fs = clamped;
-    SkPMFloat scaled = fs.multiply(Sk4f(0.25f));
+    SkPMFloat scaled = fs * Sk4f(0.25f);
     REPORTER_ASSERT(r, SkScalarNearlyEqual(63.75f, scaled.a()));
     REPORTER_ASSERT(r, SkScalarNearlyEqual(38.25f, scaled.r()));
     REPORTER_ASSERT(r, SkScalarNearlyEqual( 0.25f, scaled.g()));
diff --git a/tests/Sk2xTest.cpp b/tests/Sk2xTest.cpp
index c0cfef3..4cecc07 100644
--- a/tests/Sk2xTest.cpp
+++ b/tests/Sk2xTest.cpp
@@ -41,10 +41,6 @@
     REPORTER_ASSERT(r, vals[0] == 4 && vals[1] == 4);
 
     // Math
-    REPORTER_ASSERT(r, eq(a.add(d),      6,   9));
-    REPORTER_ASSERT(r, eq(a.subtract(d), 2,  -1));
-    REPORTER_ASSERT(r, eq(a.multiply(d), 8,  20));
-
     REPORTER_ASSERT(r, eq(a + d, 6,   9));
     REPORTER_ASSERT(r, eq(a - d, 2,  -1));
     REPORTER_ASSERT(r, eq(a * d, 8,  20));
@@ -59,7 +55,7 @@
     a += d;
     a *= d;
     a -= d;
-    REPORTER_ASSERT(r, eq(a, 10,40));
+    REPORTER_ASSERT(r, eq(a, 10, 40));
 }
 
 DEF_TEST(Sk2f, r) { test< float>(r); }
diff --git a/tests/Sk4xTest.cpp b/tests/Sk4xTest.cpp
index 1cecd4f..f25339b 100644
--- a/tests/Sk4xTest.cpp
+++ b/tests/Sk4xTest.cpp
@@ -66,24 +66,24 @@
 
     Sk4i a(2,3,4,5),
          b(1,3,5,7);
-    ASSERT_EQ(Sk4i(0,3,4,5), a.bitAnd(b));
-    ASSERT_EQ(Sk4i(3,3,5,7), a.bitOr(b));
+    ASSERT_EQ(Sk4i(0,3,4,5), a & b);
+    ASSERT_EQ(Sk4i(3,3,5,7), a | b);
 }
 
 DEF_TEST(Sk4x_Arith, r) {
-    ASSERT_EQ(Sk4f(4,6,8,10),    Sk4f(1,2,3,4).add(Sk4f(3,4,5,6)));
-    ASSERT_EQ(Sk4f(-2,-2,-2,-2), Sk4f(1,2,3,4).subtract(Sk4f(3,4,5,6)));
-    ASSERT_EQ(Sk4f(3,8,15,24),   Sk4f(1,2,3,4).multiply(Sk4f(3,4,5,6)));
+    ASSERT_EQ(Sk4f(4,6,8,10),    Sk4f(1,2,3,4) + Sk4f(3,4,5,6));
+    ASSERT_EQ(Sk4f(-2,-2,-2,-2), Sk4f(1,2,3,4) - Sk4f(3,4,5,6));
+    ASSERT_EQ(Sk4f(3,8,15,24),   Sk4f(1,2,3,4) * Sk4f(3,4,5,6));
 
     float third = 1.0f/3.0f;
-    ASSERT_EQ(Sk4f(1*third, 0.5f, 0.6f, 2*third), Sk4f(1,2,3,4).divide(Sk4f(3,4,5,6)));
-    ASSERT_EQ(Sk4i(4,6,8,10),    Sk4i(1,2,3,4).add(Sk4i(3,4,5,6)));
-    ASSERT_EQ(Sk4i(-2,-2,-2,-2), Sk4i(1,2,3,4).subtract(Sk4i(3,4,5,6)));
-    ASSERT_EQ(Sk4i(3,8,15,24),   Sk4i(1,2,3,4).multiply(Sk4i(3,4,5,6)));
+    ASSERT_EQ(Sk4f(1*third, 0.5f, 0.6f, 2*third), Sk4f(1,2,3,4) / Sk4f(3,4,5,6));
+    ASSERT_EQ(Sk4i(4,6,8,10),    Sk4i(1,2,3,4) + Sk4i(3,4,5,6));
+    ASSERT_EQ(Sk4i(-2,-2,-2,-2), Sk4i(1,2,3,4) - Sk4i(3,4,5,6));
+    ASSERT_EQ(Sk4i(3,8,15,24),   Sk4i(1,2,3,4) * Sk4i(3,4,5,6));
 }
 
-DEF_TEST(Sk4x_ImplicitPromotion, r) {
-    ASSERT_EQ(Sk4f(2,4,6,8), Sk4f(1,2,3,4).multiply(Sk4f(2.0f)));
+DEF_TEST(Sk4x_ExplicitPromotion, r) {
+    ASSERT_EQ(Sk4f(2,4,6,8), Sk4f(1,2,3,4) * Sk4f(2.0f));
 }
 
 DEF_TEST(Sk4x_Sqrt, r) {
@@ -104,22 +104,22 @@
     ASSERT_EQ(Sk4f(1,2,3,4), Sk4f(1,2,3,4));
     ASSERT_NE(Sk4f(4,3,2,1), Sk4f(1,2,3,4));
 
-    ASSERT_EQ(Sk4i(-1,-1,0,-1), Sk4f(1,2,5,4).equal(Sk4f(1,2,3,4)));
+    ASSERT_EQ(Sk4i(-1,-1,0,-1), Sk4f(1,2,5,4) == Sk4f(1,2,3,4));
 
-    ASSERT_EQ(Sk4i(-1,-1,-1,-1), Sk4f(1,2,3,4).lessThan(Sk4f(2,3,4,5)));
-    ASSERT_EQ(Sk4i(-1,-1,-1,-1), Sk4f(1,2,3,4).lessThanEqual(Sk4f(2,3,4,5)));
-    ASSERT_EQ(Sk4i(0,0,0,0),     Sk4f(1,2,3,4).greaterThan(Sk4f(2,3,4,5)));
-    ASSERT_EQ(Sk4i(0,0,0,0),     Sk4f(1,2,3,4).greaterThanEqual(Sk4f(2,3,4,5)));
+    ASSERT_EQ(Sk4i(-1,-1,-1,-1), Sk4f(1,2,3,4) <  Sk4f(2,3,4,5));
+    ASSERT_EQ(Sk4i(-1,-1,-1,-1), Sk4f(1,2,3,4) <= Sk4f(2,3,4,5));
+    ASSERT_EQ(Sk4i(0,0,0,0),     Sk4f(1,2,3,4) >  Sk4f(2,3,4,5));
+    ASSERT_EQ(Sk4i(0,0,0,0),     Sk4f(1,2,3,4) >= Sk4f(2,3,4,5));
 
     ASSERT_EQ(Sk4i(1,2,3,4), Sk4i(1,2,3,4));
     ASSERT_NE(Sk4i(4,3,2,1), Sk4i(1,2,3,4));
 
-    ASSERT_EQ(Sk4i(-1,-1,0,-1), Sk4i(1,2,5,4).equal(Sk4i(1,2,3,4)));
+    ASSERT_EQ(Sk4i(-1,-1,0,-1), Sk4i(1,2,5,4) == Sk4i(1,2,3,4));
 
-    ASSERT_EQ(Sk4i(-1,-1,-1,-1), Sk4i(1,2,3,4).lessThan(Sk4i(2,3,4,5)));
-    ASSERT_EQ(Sk4i(-1,-1,-1,-1), Sk4i(1,2,3,4).lessThanEqual(Sk4i(2,3,4,5)));
-    ASSERT_EQ(Sk4i(0,0,0,0),     Sk4i(1,2,3,4).greaterThan(Sk4i(2,3,4,5)));
-    ASSERT_EQ(Sk4i(0,0,0,0),     Sk4i(1,2,3,4).greaterThanEqual(Sk4i(2,3,4,5)));
+    ASSERT_EQ(Sk4i(-1,-1,-1,-1), Sk4i(1,2,3,4) <  Sk4i(2,3,4,5));
+    ASSERT_EQ(Sk4i(-1,-1,-1,-1), Sk4i(1,2,3,4) <= Sk4i(2,3,4,5));
+    ASSERT_EQ(Sk4i(0,0,0,0),     Sk4i(1,2,3,4) >  Sk4i(2,3,4,5));
+    ASSERT_EQ(Sk4i(0,0,0,0),     Sk4i(1,2,3,4) >= Sk4i(2,3,4,5));
 }
 
 DEF_TEST(Sk4x_MinMax, r) {