VM: Improve and fix double negation on MIPS.

runtime/vm/assembler_mips_test.cc

 // Copyright (c) 2013, 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_MIPS)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/os.h"
@@ skipping 1621 matching lines @@
 
 
 ASSEMBLER_TEST_RUN(Movd, test) {
   typedef double (*SimpleCode)() DART_UNUSED;
   EXPECT(test != NULL);
   double res = EXECUTE_TEST_CODE_DOUBLE(SimpleCode, test->entry());
   EXPECT_FLOAT_EQ(1.0, res, 0.001);
 }
 
 
+ASSEMBLER_TEST_GENERATE(Negd, assembler) {
+  __ LoadImmediate(D1, 1.0);
+  __ negd(D0, D1);
+  __ Ret();
+}
+
+
+ASSEMBLER_TEST_RUN(Negd, test) {
+  typedef double (*SimpleCode)() DART_UNUSED;
+  EXPECT(test != NULL);
+  double res = EXECUTE_TEST_CODE_DOUBLE(SimpleCode, test->entry());
+  EXPECT_FLOAT_EQ(-1.0, res, 0.001);
+}
+
+
 ASSEMBLER_TEST_GENERATE(Sdc1Ldc1, assembler) {
   __ mov(T0, SP);
   __ AddImmediate(SP, -3 * kWordSize);
   __ AndImmediate(SP, SP, ~(8 - 1));  // Align SP by 8 bytes.
   __ LoadImmediate(D1, 1.0);
   __ sdc1(D1, Address(SP));
   __ ldc1(D0, Address(SP));
   __ mov(SP, T0);
   __ Ret();
 }
@@ skipping 498 matching lines @@
 
   EXPECT_EQ(-1, RANGE_OF(Bool::True().raw()));
 
 #undef RANGE_OF
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS