Unit tests for 'testb' instruction on ia32 and x64.

runtime/vm/assembler_x64_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/os.h"
 #include "vm/unit_test.h"
@@ skipping 279 matching lines @@
   __ ret();
 }
 
 
 ASSEMBLER_TEST_RUN(Cmpb, test) {
   typedef int (*CmpbCode)();
   EXPECT_EQ(1, reinterpret_cast<CmpbCode>(test->entry())());
 }
 
 
+ASSEMBLER_TEST_GENERATE(Testb, assembler) {
+  Label done;
+  __ movq(RAX, Immediate(1));
+  __ movq(RCX, Immediate(0));
+  __ pushq(Immediate(0xffffff11));
+  __ testb(Address(RSP, 0), Immediate(0x10));
+  // Fail if zero flag set.
+  __ cmoveq(RAX, RCX);
+  __ testb(Address(RSP, 0), Immediate(0x20));
+  // Fail if zero flag not set.
+  __ j(ZERO, &done);

[regis, 2015/01/09 16:30:39]

I guess cmovneq is not implemented :-)

[koda, 2015/01/09 16:37:07]

Exactly :)

+  __ movq(RAX, Immediate(0));
+  __ Bind(&done);
+  __ popq(RCX);
+  __ ret();
+}
+
+
+ASSEMBLER_TEST_RUN(Testb, test) {
+  typedef int (*TestbCode)();
+  EXPECT_EQ(1, reinterpret_cast<TestbCode>(test->entry())());
+}
+
+
 ASSEMBLER_TEST_GENERATE(Increment, assembler) {
   __ movq(RAX, Immediate(0));
   __ pushq(RAX);
   __ incl(Address(RSP, 0));
   __ incq(Address(RSP, 0));
   __ movq(RCX, Address(RSP, 0));
   __ incq(RCX);
   __ popq(RAX);
   __ movq(RAX, RCX);
   __ ret();
@@ skipping 3202 matching lines @@
   EXPECT_EQ(ICData::kInt64RangeBit, range_of(Integer::New(kMaxInt64)));
   EXPECT_EQ(ICData::kInt64RangeBit, range_of(Integer::New(kMinInt64)));
 
   EXPECT_EQ(0, range_of(Bool::True().raw()));
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64