​MIPS: Improve Cvt_d_uw on mips32.

test/cctest/test-assembler-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1794 matching lines @@
       for (int i = 0; i < kTableLength; i++) {
         test.a = inputs[i];
         (CALL_GENERATED_CODE(isolate, f, &test, 0, 0, 0, 0));
         CHECK_EQ(test.b, outputs[j][i]);
       }
     }
   }
 }
 
 
+TEST(Cvt_d_uw) {
+  if (IsMipsArchVariant(kMips32r2)) {
+    CcTest::InitializeVM();
+    Isolate* isolate = CcTest::i_isolate();
+    HandleScope scope(isolate);
+    MacroAssembler assm(isolate, NULL, 0,
+                        v8::internal::CodeObjectRequired::kYes);
+
+    typedef struct test_struct {
+      unsigned input;
+      uint64_t output;
+    } TestStruct;
+
+    unsigned inputs[] = {
+      0x0, 0xffffffff, 0x80000000, 0x7fffffff
+    };
+
+    uint64_t outputs[] = {
+      0x0, 0x41efffffffe00000,
+      0x41e0000000000000, 0x41dfffffffc00000
+    };
+
+    int kTableLength = sizeof(inputs)/sizeof(inputs[0]);
+
+    TestStruct test;
+
+    __ lw(t1, MemOperand(a0, offsetof(TestStruct, input)));
+    __ Cvt_d_uw(f4, t1, f6);
+    __ sdc1(f4, MemOperand(a0, offsetof(TestStruct, output)));
+    __ jr(ra);
+    __ nop();
+
+    CodeDesc desc;
+    assm.GetCode(&desc);
+    Handle<Code> code = isolate->factory()->NewCode(
+        desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
+    F3 f = FUNCTION_CAST<F3>(code->entry());
+    for (int i = 0; i < kTableLength; i++) {
+      test.input = inputs[i];
+      (CALL_GENERATED_CODE(isolate, f, &test, 0, 0, 0, 0));
+      // Check outputs
+      CHECK_EQ(test.output, outputs[i]);
+    }
+  }
+}
+
+
 TEST(mina_maxa) {
   if (IsMipsArchVariant(kMips32r6)) {
     const int kTableLength = 15;
     CcTest::InitializeVM();
     Isolate* isolate = CcTest::i_isolate();
     HandleScope scope(isolate);
     MacroAssembler assm(isolate, NULL, 0,
                         v8::internal::CodeObjectRequired::kYes);
     const double double_nan = std::numeric_limits<double>::quiet_NaN();
     const float  float_nan = std::numeric_limits<float>::quiet_NaN();
@@ skipping 3338 matching lines @@
       desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
   F2 f = FUNCTION_CAST<F2>(code->entry());
 
   int32_t res = reinterpret_cast<int32_t>(
       CALL_GENERATED_CODE(isolate, f, 42, 42, 0, 0, 0));
   CHECK_EQ(res, 0);
 }
 
 
 #undef __