Add assembler test.

test/cctest/test-macro-assembler-mips.cc

Index: test/cctest/test-macro-assembler-mips.cc
diff --git a/test/cctest/test-macro-assembler-mips.cc b/test/cctest/test-macro-assembler-mips.cc
index 73de1bd5498cb107986541ea6cc4884bf61dc5f2..45dbadb8f87f13fe2fe1d78fb11f5e7ff3e9a76b 100644
--- a/test/cctest/test-macro-assembler-mips.cc
+++ b/test/cctest/test-macro-assembler-mips.cc
@@ -261,4 +261,85 @@ TEST(jump_tables4) {
 }
 
 
+static uint32_t run_lsa(uint32_t rt, uint32_t rs, int8_t sa) {
+  Isolate* isolate = CcTest::i_isolate();
+  HandleScope scope(isolate);
+  MacroAssembler assembler(isolate, nullptr, 0,
+                           v8::internal::CodeObjectRequired::kYes);
+  MacroAssembler* masm = &assembler;
+
+  __ Lsa(v0, a0, a1, sa);
+  __ jr(ra);
+  __ nop();
+
+  CodeDesc desc;
+  assembler.GetCode(&desc);
+  Handle<Code> code = isolate->factory()->NewCode(
+      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
+
+  F1 f = FUNCTION_CAST<F1>(code->entry());
+
+  uint32_t res = reinterpret_cast<uint32_t>(
+      CALL_GENERATED_CODE(isolate, f, rt, rs, 0, 0, 0));
+
+  return res;
+}
+
+
+TEST(Lsa) {
+  CcTest::InitializeVM();
+  struct TestCaseLsa {
+    int32_t rt;
+    int32_t rs;
+    uint8_t sa;
+    uint32_t expected_res;
+  };
+
+  struct TestCaseLsa tc[] = {// rt, rs, sa, expected_res
+                             {0x4, 0x1, 1, 0x6},
+                             {0x4, 0x1, 2, 0x8},
+                             {0x4, 0x1, 3, 0xc},
+                             {0x4, 0x1, 4, 0x14},
+                             {0x4, 0x1, 5, 0x24},
+                             {0x0, 0x1, 1, 0x2},
+                             {0x0, 0x1, 2, 0x4},
+                             {0x0, 0x1, 3, 0x8},
+                             {0x0, 0x1, 4, 0x10},
+                             {0x0, 0x1, 5, 0x20},
+                             {0x4, 0x0, 1, 0x4},
+                             {0x4, 0x0, 2, 0x4},
+                             {0x4, 0x0, 3, 0x4},
+                             {0x4, 0x0, 4, 0x4},
+                             {0x4, 0x0, 5, 0x4},
+
+                             // Shift overflow.
+                             {0x4, INT32_MAX, 1, 0x2},
+                             {0x4, INT32_MAX >> 1, 2, 0x0},
+                             {0x4, INT32_MAX >> 2, 3, 0xfffffffc},
+                             {0x4, INT32_MAX >> 3, 4, 0xfffffff4},
+                             {0x4, INT32_MAX >> 4, 5, 0xffffffe4},
+
+                             // Signed addition overflow.
+                             {INT32_MAX - 1, 0x1, 1, 0x80000000},
+                             {INT32_MAX - 3, 0x1, 2, 0x80000000},
+                             {INT32_MAX - 7, 0x1, 3, 0x80000000},
+                             {INT32_MAX - 15, 0x1, 4, 0x80000000},
+                             {INT32_MAX - 31, 0x1, 5, 0x80000000},
+
+                             // Addition overflow.
+                             {-2, 0x1, 1, 0x0},
+                             {-4, 0x1, 2, 0x0},
+                             {-8, 0x1, 3, 0x0},
+                             {-16, 0x1, 4, 0x0},
+                             {-32, 0x1, 5, 0x0}};
+
+  size_t nr_test_cases = sizeof(tc) / sizeof(TestCaseLsa);
+  for (size_t i = 0; i < nr_test_cases; ++i) {
+    uint32_t res = run_lsa(tc[i].rt, tc[i].rs, tc[i].sa);
+    PrintF("0x%x =? 0x%x == lsa(v0, %x, %x, %hhu)\n", tc[i].expected_res, res,
+           tc[i].rt, tc[i].rs, tc[i].sa);
+    CHECK_EQ(tc[i].expected_res, res);
+  }
+}
+
 #undef __