MIPS: [turbofan] Combine ChangeFloat64ToInt32 with Float64Round ops.

test/unittests/compiler/mips/instruction-selector-mips-unittest.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file
 
 #include "test/unittests/compiler/instruction-selector-unittest.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
@@ skipping 200 matching lines @@
     // mips instruction: trunc_w_d
     {{&RawMachineAssembler::ChangeFloat64ToInt32, "ChangeFloat64ToInt32",
       kMipsTruncWD, kMachFloat64},
      kMachInt32},
 
     // mips instruction: trunc_uw_d
     {{&RawMachineAssembler::ChangeFloat64ToUint32, "ChangeFloat64ToUint32",
       kMipsTruncUwD, kMachFloat64},
      kMachInt32}};
 
+const Conversion kFloat64RoundInstructions[] = {
+    {{&RawMachineAssembler::Float64RoundUp, "Float64RoundUp", kMipsCeilWD,
+      kMachFloat64},
+     kMachInt32},
+    {{&RawMachineAssembler::Float64RoundDown, "Float64RoundDown", kMipsFloorWD,
+      kMachFloat64},
+     kMachInt32},
+    {{&RawMachineAssembler::Float64RoundTiesEven, "Float64RoundTiesEven",
+      kMipsRoundWD, kMachFloat64},
+     kMachInt32},
+    {{&RawMachineAssembler::Float64RoundTruncate, "Float64RoundTruncate",
+      kMipsTruncWD, kMachFloat64},
+     kMachInt32}};
+
 }  // namespace
 
 
 typedef InstructionSelectorTestWithParam<FPCmp> InstructionSelectorFPCmpTest;
 
 
 TEST_P(InstructionSelectorFPCmpTest, Parameter) {
   const FPCmp cmp = GetParam();
   StreamBuilder m(this, kMachInt32, cmp.mi.machine_type, cmp.mi.machine_type);
   m.Return((m.*cmp.mi.constructor)(m.Parameter(0), m.Parameter(1)));
@@ skipping 391 matching lines @@
   EXPECT_EQ(1U, s[0]->InputCount());
   EXPECT_EQ(1U, s[0]->OutputCount());
 }
 
 
 INSTANTIATE_TEST_CASE_P(InstructionSelectorTest,
                         InstructionSelectorConversionTest,
                         ::testing::ValuesIn(kConversionInstructions));
 
 
+typedef InstructionSelectorTestWithParam<Conversion>
+    CombineChangeFloat64ToInt32WithRoundFloat64;
+
+TEST_P(CombineChangeFloat64ToInt32WithRoundFloat64, Parameter) {
+  {
+    const Conversion conv = GetParam();
+    StreamBuilder m(this, conv.mi.machine_type, conv.src_machine_type);
+    m.Return(m.ChangeFloat64ToInt32((m.*conv.mi.constructor)(m.Parameter(0))));
+    Stream s = m.Build();
+    ASSERT_EQ(1U, s.size());
+    EXPECT_EQ(conv.mi.arch_opcode, s[0]->arch_opcode());
+    EXPECT_EQ(kMode_None, s[0]->addressing_mode());
+    ASSERT_EQ(1U, s[0]->InputCount());
+    EXPECT_EQ(1U, s[0]->OutputCount());
+  }
+}
+
+INSTANTIATE_TEST_CASE_P(InstructionSelectorTest,
+                        CombineChangeFloat64ToInt32WithRoundFloat64,
+                        ::testing::ValuesIn(kFloat64RoundInstructions));
+
+
 // ----------------------------------------------------------------------------
 // Loads and stores.
 // ----------------------------------------------------------------------------
 
 namespace {
 
 struct MemoryAccess {
   MachineType type;
   ArchOpcode load_opcode;
   ArchOpcode store_opcode;
@@ skipping 415 matching lines @@
   EXPECT_EQ(kMipsFloat64Min, s[0]->arch_opcode());
   ASSERT_EQ(2U, s[0]->InputCount());
   ASSERT_EQ(1U, s[0]->OutputCount());
   EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
 }
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8