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27
28#include <stdlib.h>
29
30#include "src/v8.h"
31
32#include "src/base/platform/platform.h"
33#include "src/code-stubs.h"
34#include "src/factory.h"
35#include "src/macro-assembler.h"
36#include "src/mips64/constants-mips64.h"
37#include "src/simulator.h"
38#include "test/cctest/cctest.h"
39#include "test/cctest/test-code-stubs.h"
40
41using namespace v8::internal;
42
43#define __ masm.
44
45ConvertDToIFunc MakeConvertDToIFuncTrampoline(Isolate* isolate,
46                                              Register source_reg,
47                                              Register destination_reg,
48                                              bool inline_fastpath) {
49  // Allocate an executable page of memory.
50  size_t actual_size;
51  byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
52      Assembler::kMinimalBufferSize, &actual_size, true));
53  CHECK(buffer);
54  HandleScope handles(isolate);
55  MacroAssembler masm(isolate, buffer, static_cast<int>(actual_size));
56  DoubleToIStub stub(isolate, source_reg, destination_reg, 0, true,
57                     inline_fastpath);
58
59  byte* start = stub.GetCode()->instruction_start();
60  Label done;
61
62  // Save callee save registers.
63  __ MultiPush(kCalleeSaved | ra.bit());
64
65  // For softfp, move the input value into f12.
66  if (IsMipsSoftFloatABI) {
67    __ Move(f12, a0, a1);
68  }
69  // Push the double argument.
70  __ Dsubu(sp, sp, Operand(kDoubleSize));
71  __ sdc1(f12, MemOperand(sp));
72  __ Move(source_reg, sp);
73
74  // Save registers make sure they don't get clobbered.
75  int source_reg_offset = kDoubleSize;
76  int reg_num = 2;
77  for (;reg_num < Register::NumAllocatableRegisters(); ++reg_num) {
78    Register reg = Register::from_code(reg_num);
79    if (!reg.is(destination_reg)) {
80      __ push(reg);
81      source_reg_offset += kPointerSize;
82    }
83  }
84
85  // Re-push the double argument.
86  __ Dsubu(sp, sp, Operand(kDoubleSize));
87  __ sdc1(f12, MemOperand(sp));
88
89  // Call through to the actual stub
90  if (inline_fastpath) {
91    __ ldc1(f12, MemOperand(source_reg));
92    __ TryInlineTruncateDoubleToI(destination_reg, f12, &done);
93    if (destination_reg.is(source_reg) && !source_reg.is(sp)) {
94      // Restore clobbered source_reg.
95      __ Daddu(source_reg, sp, Operand(source_reg_offset));
96    }
97  }
98  __ Call(start, RelocInfo::EXTERNAL_REFERENCE);
99  __ bind(&done);
100
101  __ Daddu(sp, sp, Operand(kDoubleSize));
102
103  // Make sure no registers have been unexpectedly clobbered
104  for (--reg_num; reg_num >= 2; --reg_num) {
105    Register reg = Register::from_code(reg_num);
106    if (!reg.is(destination_reg)) {
107      __ lw(at, MemOperand(sp, 0));
108      __ Assert(eq, kRegisterWasClobbered, reg, Operand(at));
109      __ Daddu(sp, sp, Operand(kPointerSize));
110    }
111  }
112
113  __ Daddu(sp, sp, Operand(kDoubleSize));
114
115  __ Move(v0, destination_reg);
116  Label ok;
117  __ Branch(&ok, eq, v0, Operand(zero_reg));
118  __ bind(&ok);
119
120  // Restore callee save registers.
121  __ MultiPop(kCalleeSaved | ra.bit());
122
123  Label ok1;
124  __ Branch(&ok1, eq, v0, Operand(zero_reg));
125  __ bind(&ok1);
126  __ Ret();
127
128  CodeDesc desc;
129  masm.GetCode(&desc);
130  CpuFeatures::FlushICache(buffer, actual_size);
131  return (reinterpret_cast<ConvertDToIFunc>(
132      reinterpret_cast<intptr_t>(buffer)));
133}
134
135#undef __
136
137
138static Isolate* GetIsolateFrom(LocalContext* context) {
139  return reinterpret_cast<Isolate*>((*context)->GetIsolate());
140}
141
142
143int32_t RunGeneratedCodeCallWrapper(ConvertDToIFunc func,
144                                    double from) {
145#ifdef USE_SIMULATOR
146  Simulator::current(Isolate::Current())->CallFP(FUNCTION_ADDR(func), from, 0.);
147  return Simulator::current(Isolate::Current())->get_register(v0.code());
148#else
149  return (*func)(from);
150#endif
151}
152
153
154TEST(ConvertDToI) {
155  CcTest::InitializeVM();
156  LocalContext context;
157  Isolate* isolate = GetIsolateFrom(&context);
158  HandleScope scope(isolate);
159
160#if DEBUG
161  // Verify that the tests actually work with the C version. In the release
162  // code, the compiler optimizes it away because it's all constant, but does it
163  // wrong, triggering an assert on gcc.
164  RunAllTruncationTests(&ConvertDToICVersion);
165#endif
166
167  Register source_registers[] = {
168      sp, v0, v1, a0, a1, a2, a3, a4, a5, a6, a7, t0, t1};
169  Register dest_registers[] = {
170      v0, v1, a0, a1, a2, a3, a4, a5, a6, a7, t0, t1};
171
172  for (size_t s = 0; s < sizeof(source_registers) / sizeof(Register); s++) {
173    for (size_t d = 0; d < sizeof(dest_registers) / sizeof(Register); d++) {
174      RunAllTruncationTests(
175          RunGeneratedCodeCallWrapper,
176          MakeConvertDToIFuncTrampoline(isolate,
177                                        source_registers[s],
178                                        dest_registers[d],
179                                        false));
180      RunAllTruncationTests(
181          RunGeneratedCodeCallWrapper,
182          MakeConvertDToIFuncTrampoline(isolate,
183                                        source_registers[s],
184                                        dest_registers[d],
185                                        true));
186    }
187  }
188}
189