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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/simulator.h"
37#include "test/cctest/cctest.h"
38#include "test/cctest/test-code-stubs.h"
39
40using namespace v8::internal;
41
42#define __ masm.
43
44ConvertDToIFunc MakeConvertDToIFuncTrampoline(Isolate* isolate,
45                                              Register source_reg,
46                                              Register destination_reg,
47                                              bool inline_fastpath) {
48  // Allocate an executable page of memory.
49  size_t actual_size;
50  byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
51      Assembler::kMinimalBufferSize, &actual_size, true));
52  CHECK(buffer);
53  HandleScope handles(isolate);
54  MacroAssembler masm(isolate, buffer, static_cast<int>(actual_size),
55                      v8::internal::CodeObjectRequired::kYes);
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  __ Push(r7, r6, r5, r4);
64  __ Push(lr);
65
66  // For softfp, move the input value into d0.
67  if (!masm.use_eabi_hardfloat()) {
68    __ vmov(d0, r0, r1);
69  }
70  // Push the double argument.
71  __ sub(sp, sp, Operand(kDoubleSize));
72  __ vstr(d0, sp, 0);
73  if (!source_reg.is(sp)) {
74    __ mov(source_reg, sp);
75  }
76
77  // Save registers make sure they don't get clobbered.
78  int source_reg_offset = kDoubleSize;
79  int reg_num = 0;
80  for (; reg_num < Register::kNumRegisters; ++reg_num) {
81    Register reg = Register::from_code(reg_num);
82    if (reg.IsAllocatable()) {
83      if (!reg.is(destination_reg)) {
84        __ push(reg);
85        source_reg_offset += kPointerSize;
86      }
87    }
88  }
89
90  // Re-push the double argument.
91  __ sub(sp, sp, Operand(kDoubleSize));
92  __ vstr(d0, sp, 0);
93
94  // Call through to the actual stub
95  if (inline_fastpath) {
96    __ vldr(d0, MemOperand(source_reg));
97    __ TryInlineTruncateDoubleToI(destination_reg, d0, &done);
98    if (destination_reg.is(source_reg) && !source_reg.is(sp)) {
99      // Restore clobbered source_reg.
100      __ add(source_reg, sp, Operand(source_reg_offset));
101    }
102  }
103  __ Call(start, RelocInfo::EXTERNAL_REFERENCE);
104  __ bind(&done);
105
106  __ add(sp, sp, Operand(kDoubleSize));
107
108  // Make sure no registers have been unexpectedly clobbered
109  for (--reg_num; reg_num >= 0; --reg_num) {
110    Register reg = Register::from_code(reg_num);
111    if (reg.IsAllocatable()) {
112      if (!reg.is(destination_reg)) {
113        __ ldr(ip, MemOperand(sp, 0));
114        __ cmp(reg, ip);
115        __ Assert(eq, kRegisterWasClobbered);
116        __ add(sp, sp, Operand(kPointerSize));
117      }
118    }
119  }
120
121  __ add(sp, sp, Operand(kDoubleSize));
122
123  if (!destination_reg.is(r0))
124    __ mov(r0, destination_reg);
125
126  // Restore callee save registers.
127  __ Pop(lr);
128  __ Pop(r7, r6, r5, r4);
129
130  __ Ret(0);
131
132  CodeDesc desc;
133  masm.GetCode(&desc);
134  Assembler::FlushICache(isolate, buffer, actual_size);
135  return (reinterpret_cast<ConvertDToIFunc>(
136      reinterpret_cast<intptr_t>(buffer)));
137}
138
139#undef __
140
141
142static Isolate* GetIsolateFrom(LocalContext* context) {
143  return reinterpret_cast<Isolate*>((*context)->GetIsolate());
144}
145
146
147int32_t RunGeneratedCodeCallWrapper(ConvertDToIFunc func,
148                                    double from) {
149#ifdef USE_SIMULATOR
150  return CALL_GENERATED_FP_INT(CcTest::i_isolate(), func, from, 0);
151#else
152  return (*func)(from);
153#endif
154}
155
156
157TEST(ConvertDToI) {
158  CcTest::InitializeVM();
159  LocalContext context;
160  Isolate* isolate = GetIsolateFrom(&context);
161  HandleScope scope(isolate);
162
163#if DEBUG
164  // Verify that the tests actually work with the C version. In the release
165  // code, the compiler optimizes it away because it's all constant, but does it
166  // wrong, triggering an assert on gcc.
167  RunAllTruncationTests(&ConvertDToICVersion);
168#endif
169
170  Register source_registers[] = {sp, r0, r1, r2, r3, r4, r5, r6, r7};
171  Register dest_registers[] = {r0, r1, r2, r3, r4, r5, r6, r7};
172
173  for (size_t s = 0; s < sizeof(source_registers) / sizeof(Register); s++) {
174    for (size_t d = 0; d < sizeof(dest_registers) / sizeof(Register); d++) {
175      RunAllTruncationTests(
176          RunGeneratedCodeCallWrapper,
177          MakeConvertDToIFuncTrampoline(isolate,
178                                        source_registers[s],
179                                        dest_registers[d],
180                                        false));
181      RunAllTruncationTests(
182          RunGeneratedCodeCallWrapper,
183          MakeConvertDToIFuncTrampoline(isolate,
184                                        source_registers[s],
185                                        dest_registers[d],
186                                        true));
187    }
188  }
189}
190