Add SkDivMod with a special case for ARM.

tests/MathTest.cpp

Index: tests/MathTest.cpp
diff --git a/tests/MathTest.cpp b/tests/MathTest.cpp
index cb4d0b8bd2e8f281ad905eff5961004ab9f391a9..feb0d73da6bd2a300f845b93e5b299ae85842ab6 100644
--- a/tests/MathTest.cpp
+++ b/tests/MathTest.cpp
@@ -691,3 +691,59 @@ static void TestEndian(skiatest::Reporter* reporter) {
 }
 
 DEFINE_TESTCLASS("Endian", EndianTestClass, TestEndian)
+
+DEF_TEST(divmod_u8, r) {
+    uint8_t div, mod;
+    SkDivMod<uint8_t>(17, 4, &div, &mod);
+    REPORTER_ASSERT(r, div == 4);
+    REPORTER_ASSERT(r, mod == 1);
+}
+
+DEF_TEST(divmod_u16, r) {
+    uint16_t div, mod;
+    SkDivMod<uint16_t>(17, 4, &div, &mod);
+    REPORTER_ASSERT(r, div == 4);
+    REPORTER_ASSERT(r, mod == 1);
+}
+
+DEF_TEST(divmod_u32, r) {
+    uint32_t div, mod;
+    SkDivMod<uint32_t>(17, 4, &div, &mod);
+    REPORTER_ASSERT(r, div == 4);
+    REPORTER_ASSERT(r, mod == 1);
+}
+
+DEF_TEST(divmod_u64, r) {
+    uint64_t div, mod;
+    SkDivMod<uint64_t>(17, 4, &div, &mod);
+    REPORTER_ASSERT(r, div == 4);
+    REPORTER_ASSERT(r, mod == 1);
+}
+
+DEF_TEST(divmod_s8, r) {
+    int8_t div, mod;
+    SkDivMod<int8_t>(17, 4, &div, &mod);
+    REPORTER_ASSERT(r, div == 4);
+    REPORTER_ASSERT(r, mod == 1);
+}
+
+DEF_TEST(divmod_s16, r) {
+    int16_t div, mod;
+    SkDivMod<int16_t>(17, 4, &div, &mod);
+    REPORTER_ASSERT(r, div == 4);
+    REPORTER_ASSERT(r, mod == 1);
+}
+
+DEF_TEST(divmod_s32, r) {
+    int32_t div, mod;
+    SkDivMod<int32_t>(17, 4, &div, &mod);
+    REPORTER_ASSERT(r, div == 4);
+    REPORTER_ASSERT(r, mod == 1);
+}
+
+DEF_TEST(divmod_s64, r) {
+    int64_t div, mod;
+    SkDivMod<int64_t>(17, 4, &div, &mod);
+    REPORTER_ASSERT(r, div == 4);
+    REPORTER_ASSERT(r, mod == 1);
+}