ARM64: Faster immediate check and fix corner cases

test/cctest/test-assembler-arm64.cc

Index: test/cctest/test-assembler-arm64.cc
diff --git a/test/cctest/test-assembler-arm64.cc b/test/cctest/test-assembler-arm64.cc
index 8d641bd788ceb502a5f5ae6829dbfe2884ae3714..3ac3669750242fdf405e135e7afdef47cf8215cb 100644
--- a/test/cctest/test-assembler-arm64.cc
+++ b/test/cctest/test-assembler-arm64.cc
@@ -426,6 +426,9 @@ TEST(mov_imm_w) {
   __ Mov(w4, 0x00001234L);
   __ Mov(w5, 0x12340000L);
   __ Mov(w6, 0x12345678L);
+  __ Mov(w7, (int32_t)0x80000000);
+  __ Mov(w8, (int32_t)0xffff0000);
+  __ Mov(w9, kWMinInt);
   END();
 
   RUN();
@@ -437,6 +440,9 @@ TEST(mov_imm_w) {
   ASSERT_EQUAL_64(0x00001234L, x4);
   ASSERT_EQUAL_64(0x12340000L, x5);
   ASSERT_EQUAL_64(0x12345678L, x6);
+  ASSERT_EQUAL_64(0x80000000L, x7);
+  ASSERT_EQUAL_64(0xffff0000L, x8);
+  ASSERT_EQUAL_32(kWMinInt, w9);
 
   TEARDOWN();
 }
@@ -588,6 +594,9 @@ TEST(bitwise_wide_imm) {
 
   __ Orr(x10, x0, Operand(0x1234567890abcdefUL));
   __ Orr(w11, w1, Operand(0x90abcdef));
+
+  __ Orr(w12, w0, kWMinInt);
+  __ Eor(w13, w0, kWMinInt);
   END();
 
   RUN();
@@ -596,6 +605,8 @@ TEST(bitwise_wide_imm) {
   ASSERT_EQUAL_64(0xf0f0f0f0f0f0f0f0UL, x1);
   ASSERT_EQUAL_64(0x1234567890abcdefUL, x10);
   ASSERT_EQUAL_64(0xf0fbfdffUL, x11);
+  ASSERT_EQUAL_32(kWMinInt, w12);
+  ASSERT_EQUAL_32(kWMinInt, w13);
 
   TEARDOWN();
 }
@@ -3362,8 +3373,10 @@ TEST(add_sub_wide_imm) {
   __ Add(w12, w0, Operand(0x12345678));
   __ Add(w13, w1, Operand(0xffffffff));
 
-  __ Sub(x20, x0, Operand(0x1234567890abcdefUL));
+  __ Add(w18, w0, Operand(kWMinInt));
+  __ Sub(w19, w0, Operand(kWMinInt));
 
+  __ Sub(x20, x0, Operand(0x1234567890abcdefUL));
   __ Sub(w21, w0, Operand(0x12345678));
   END();
 
@@ -3375,8 +3388,10 @@ TEST(add_sub_wide_imm) {
   ASSERT_EQUAL_32(0x12345678, w12);
   ASSERT_EQUAL_64(0x0, x13);
 
-  ASSERT_EQUAL_64(-0x1234567890abcdefUL, x20);
+  ASSERT_EQUAL_32(kWMinInt, w18);
+  ASSERT_EQUAL_32(kWMinInt, w19);
 
+  ASSERT_EQUAL_64(-0x1234567890abcdefUL, x20);
   ASSERT_EQUAL_32(-0x12345678, w21);
 
   TEARDOWN();