Implement some conditional moves instructions for ia32/x64. Use them in MinMax instruction implemen…

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/os.h"
 #include "vm/unit_test.h"
@@ skipping 2609 matching lines @@
 
 ASSEMBLER_TEST_RUN(ConditionalMovesSign, test) {
   typedef int (*ConditionalMovesSignCode)(int i);
   int res = reinterpret_cast<ConditionalMovesSignCode>(test->entry())(785);
   EXPECT_EQ(1, res);
   res = reinterpret_cast<ConditionalMovesSignCode>(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();
+}
+
+
+ASSEMBLER_TEST_RUN(ConditionalMovesCompare, test) {
+  typedef int (*ConditionalMovesCompareCode)(int i, int i);
+  int res = reinterpret_cast<ConditionalMovesCompareCode>(test->entry())(10, 5);
+  EXPECT_EQ(1, res);  // Greater equal.
+  res = reinterpret_cast<ConditionalMovesCompareCode>(test->entry())(5, 5);
+  EXPECT_EQ(1, res);  // Greater equal.
+  res = reinterpret_cast<ConditionalMovesCompareCode>(test->entry())(2, 5);
+  EXPECT_EQ(-1, res);  // Less.
+}
+
+
 ASSEMBLER_TEST_GENERATE(TestLoadDoubleConstant, assembler) {
   __ LoadDoubleConstant(XMM3, -12.34);
   __ pushl(EAX);
   __ pushl(EAX);
   __ movsd(Address(ESP, 0), XMM3);
   __ fldl(Address(ESP, 0));
   __ popl(EAX);
   __ popl(EAX);
   __ ret();
 }
@@ skipping 166 matching lines @@
                      FieldAddress(ECX, GrowableObjectArray::data_offset()),
                      EAX);
   __ popl(EAX);
   __ popl(CTX);
   __ ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32