MIPS: use DAHI/DATH for li macro on mips64r6.

test/cctest/test-assembler-mips64.cc

Index: test/cctest/test-assembler-mips64.cc
diff --git a/test/cctest/test-assembler-mips64.cc b/test/cctest/test-assembler-mips64.cc
index 988083cadc0247c799d19cfc67ed70d357f27eb4..255f205e5be4be4662ea280a88d763c354e3af59 100644
--- a/test/cctest/test-assembler-mips64.cc
+++ b/test/cctest/test-assembler-mips64.cc
@@ -4997,6 +4997,54 @@ TEST(r6_aui_family) {
 }
 
 
+uint64_t run_li_macro(uint64_t rs, LiFlags mode) {
+  Isolate* isolate = CcTest::i_isolate();
+  HandleScope scope(isolate);
+  MacroAssembler assm(isolate, NULL, 0, v8::internal::CodeObjectRequired::kYes);
+
+  __ li(a0, rs, mode);
+  __ mov(v0, a0);
+  __ jr(ra);
+  __ nop();
+
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  Handle<Code> code = isolate->factory()->NewCode(
+      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
+
+  F2 f = FUNCTION_CAST<F2>(code->entry());
+
+  uint64_t res = reinterpret_cast<uint64_t>(
+      CALL_GENERATED_CODE(isolate, f, 0, 0, 0, 0, 0));
+
+  return res;
+}
+
+
+TEST(li_macro) {
+  CcTest::InitializeVM();
+
+  uint64_t inputs[] = {
+      0x0000000000000000, 0x000000000000ffff, 0x00000000ffffffff,
+      0x0000ffffffffffff, 0xffffffffffffffff, 0xffff000000000000,
+      0xffffffff00000000, 0xffffffffffff0000, 0xffff0000ffff0000,
+      0x0000ffffffff0000, 0x0000ffff0000ffff,
+  };
+
+  size_t nr_test_cases = sizeof(inputs) / sizeof(inputs[0]);
+  for (size_t i = 0; i < nr_test_cases; ++i) {
+    uint64_t res = run_li_macro(inputs[i], OPTIMIZE_SIZE);
+    CHECK_EQ(inputs[i], res);
+    res = run_li_macro(inputs[i], CONSTANT_SIZE);
+    CHECK_EQ(inputs[i], res);
+    if (is_int48(inputs[i])) {
+      res = run_li_macro(inputs[i], ADDRESS_LOAD);
+      CHECK_EQ(inputs[i], res);
+    }
+  }
+}
+
+
 uint64_t run_lwpc(int offset) {
   Isolate* isolate = CcTest::i_isolate();
   HandleScope scope(isolate);