Better sequences for class id loading on ia32.

runtime/vm/assembler_ia32_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_IA32)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/os.h"
@@ skipping 3055 matching lines @@
   __ xorl(EAX, EAX);
   __ movl(ECX, Immediate(1));
   __ movl(EDX, Address(ESP, 1 * kWordSize));
   __ cmpl(EDX, Immediate(785));
   __ cmove(EAX, ECX);
   __ ret();
 }
 
 
 ASSEMBLER_TEST_RUN(ConditionalMovesEqual, test) {
-  typedef int (*ConditionalMovesSignCode)(int i);
-  int res = reinterpret_cast<ConditionalMovesSignCode>(test->entry())(785);
+  typedef int (*ConditionalMovesEqualCode)(int i);
+  int res = reinterpret_cast<ConditionalMovesEqualCode>(test->entry())(785);
   EXPECT_EQ(1, res);
-  res = reinterpret_cast<ConditionalMovesSignCode>(test->entry())(-12);
+  res = reinterpret_cast<ConditionalMovesEqualCode>(test->entry())(-12);
   EXPECT_EQ(0, res);
 }
 
 
+// Return 1 if not equal, 0 if equal.
+ASSEMBLER_TEST_GENERATE(ConditionalMovesNotEqual, assembler) {
+  __ xorl(EAX, EAX);
+  __ movl(ECX, Immediate(1));
+  __ movl(EDX, Address(ESP, 1 * kWordSize));
+  __ cmpl(EDX, Immediate(785));
+  __ cmovne(EAX, ECX);
+  __ ret();
+}
+
+
+ASSEMBLER_TEST_RUN(ConditionalMovesNotEqual, test) {
+  typedef int (*ConditionalMovesNotEqualCode)(int i);
+  int res = reinterpret_cast<ConditionalMovesNotEqualCode>(test->entry())(785);
+  EXPECT_EQ(0, res);
+  res = reinterpret_cast<ConditionalMovesNotEqualCode>(test->entry())(-12);
+  EXPECT_EQ(1, res);
+}
+
+
 ASSEMBLER_TEST_GENERATE(ConditionalMovesCompare, assembler) {
   __ movl(EDX, Immediate(1));  // Greater equal.
   __ movl(ECX, Immediate(-1));  // Less
   __ movl(EAX, Address(ESP, 1 * kWordSize));
   __ cmpl(EAX, Address(ESP, 2 * kWordSize));
   __ cmovlessl(EAX, ECX);
   __ cmovgel(EAX, EDX);
   __ ret();
 }
 
@@ skipping 208 matching lines @@
 
 ASSEMBLER_TEST_RUN(BitTest, test) {
   typedef int (*BitTest)();
   EXPECT_EQ(1, reinterpret_cast<BitTest>(test->entry())());
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32