[arm] Add support for SMMLA, SMMLS and SMMUL.

test/unittests/base/bits-unittest.cc

Index: test/unittests/base/bits-unittest.cc
diff --git a/test/unittests/base/bits-unittest.cc b/test/unittests/base/bits-unittest.cc
index caedae2408e16f4579f84560b65b1b6996a93f87..65b0a76a013a00137c05d71f54003b7e410c3e4c 100644
--- a/test/unittests/base/bits-unittest.cc
+++ b/test/unittests/base/bits-unittest.cc
@@ -199,6 +199,42 @@ TEST(Bits, SignedSubOverflow32) {
   }
 }
 
+
+TEST(Bits, SignedMulHigh32) {
+  EXPECT_EQ(0, SignedMulHigh32(0, 0));
+  TRACED_FORRANGE(int32_t, i, 1, 50) {
+    TRACED_FORRANGE(int32_t, j, 1, i) { EXPECT_EQ(0, SignedMulHigh32(i, j)); }
+  }
+  EXPECT_EQ(-1073741824, SignedMulHigh32(std::numeric_limits<int32_t>::max(),
+                                         std::numeric_limits<int32_t>::min()));
+  EXPECT_EQ(-1073741824, SignedMulHigh32(std::numeric_limits<int32_t>::min(),
+                                         std::numeric_limits<int32_t>::max()));
+  EXPECT_EQ(1, SignedMulHigh32(1024 * 1024 * 1024, 4));
+  EXPECT_EQ(2, SignedMulHigh32(8 * 1024, 1024 * 1024));
+}
+
+
+TEST(Bits, SignedMulHighAndAdd32) {
+  TRACED_FORRANGE(int32_t, i, 1, 50) {
+    EXPECT_EQ(i, SignedMulHighAndAdd32(0, 0, i));
+    TRACED_FORRANGE(int32_t, j, 1, i) {
+      EXPECT_EQ(i, SignedMulHighAndAdd32(j, j, i));
+    }
+    EXPECT_EQ(i + 1, SignedMulHighAndAdd32(1024 * 1024 * 1024, 4, i));
+  }
+}
+
+
+TEST(Bits, SignedMulHighAndSub32) {
+  TRACED_FORRANGE(int32_t, i, 1, 50) {
+    EXPECT_EQ(i, SignedMulHighAndSub32(0, 0, i));
+    TRACED_FORRANGE(int32_t, j, 1, i) {
+      EXPECT_EQ(i, SignedMulHighAndSub32(j, j, i));
+    }
+    EXPECT_EQ(i - 1, SignedMulHighAndSub32(1024 * 1024 * 1024, 4, i));
+  }
+}
+
 }  // namespace bits
 }  // namespace base
 }  // namespace v8