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27
28#include <stdlib.h>
29
30#include "src/v8.h"
31#include "test/cctest/cctest.h"
32
33#include "src/macro-assembler.h"
34#include "src/mips64/macro-assembler-mips64.h"
35#include "src/mips64/simulator-mips64.h"
36
37
38using namespace v8::internal;
39
40typedef void* (*F)(int64_t x, int64_t y, int p2, int p3, int p4);
41
42#define __ masm->
43
44
45static byte to_non_zero(int n) {
46  return static_cast<unsigned>(n) % 255 + 1;
47}
48
49
50static bool all_zeroes(const byte* beg, const byte* end) {
51  CHECK(beg);
52  CHECK(beg <= end);
53  while (beg < end) {
54    if (*beg++ != 0)
55      return false;
56  }
57  return true;
58}
59
60
61TEST(CopyBytes) {
62  CcTest::InitializeVM();
63  Isolate* isolate = Isolate::Current();
64  HandleScope handles(isolate);
65
66  const int data_size = 1 * KB;
67  size_t act_size;
68
69  // Allocate two blocks to copy data between.
70  byte* src_buffer =
71      static_cast<byte*>(v8::base::OS::Allocate(data_size, &act_size, 0));
72  CHECK(src_buffer);
73  CHECK(act_size >= static_cast<size_t>(data_size));
74  byte* dest_buffer =
75      static_cast<byte*>(v8::base::OS::Allocate(data_size, &act_size, 0));
76  CHECK(dest_buffer);
77  CHECK(act_size >= static_cast<size_t>(data_size));
78
79  // Storage for a0 and a1.
80  byte* a0_;
81  byte* a1_;
82
83  MacroAssembler assembler(isolate, NULL, 0);
84  MacroAssembler* masm = &assembler;
85
86  // Code to be generated: The stuff in CopyBytes followed by a store of a0 and
87  // a1, respectively.
88  __ CopyBytes(a0, a1, a2, a3);
89  __ li(a2, Operand(reinterpret_cast<int64_t>(&a0_)));
90  __ li(a3, Operand(reinterpret_cast<int64_t>(&a1_)));
91  __ sd(a0, MemOperand(a2));
92  __ jr(ra);
93  __ sd(a1, MemOperand(a3));
94
95  CodeDesc desc;
96  masm->GetCode(&desc);
97  Handle<Code> code = isolate->factory()->NewCode(
98      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
99
100  ::F f = FUNCTION_CAST< ::F>(code->entry());
101
102  // Initialise source data with non-zero bytes.
103  for (int i = 0; i < data_size; i++) {
104    src_buffer[i] = to_non_zero(i);
105  }
106
107  const int fuzz = 11;
108
109  for (int size = 0; size < 600; size++) {
110    for (const byte* src = src_buffer; src < src_buffer + fuzz; src++) {
111      for (byte* dest = dest_buffer; dest < dest_buffer + fuzz; dest++) {
112        memset(dest_buffer, 0, data_size);
113        CHECK(dest + size < dest_buffer + data_size);
114        (void) CALL_GENERATED_CODE(f, reinterpret_cast<int64_t>(src),
115                                      reinterpret_cast<int64_t>(dest),
116                                      size, 0, 0);
117        // a0 and a1 should point at the first byte after the copied data.
118        CHECK_EQ(src + size, a0_);
119        CHECK_EQ(dest + size, a1_);
120        // Check that we haven't written outside the target area.
121        CHECK(all_zeroes(dest_buffer, dest));
122        CHECK(all_zeroes(dest + size, dest_buffer + data_size));
123        // Check the target area.
124        CHECK_EQ(0, memcmp(src, dest, size));
125      }
126    }
127  }
128
129  // Check that the source data hasn't been clobbered.
130  for (int i = 0; i < data_size; i++) {
131    CHECK(src_buffer[i] == to_non_zero(i));
132  }
133}
134
135
136TEST(LoadConstants) {
137  CcTest::InitializeVM();
138  Isolate* isolate = Isolate::Current();
139  HandleScope handles(isolate);
140
141  int64_t refConstants[64];
142  int64_t result[64];
143
144  int64_t mask = 1;
145  for (int i = 0; i < 64; i++) {
146    refConstants[i] = ~(mask << i);
147  }
148
149  MacroAssembler assembler(isolate, NULL, 0);
150  MacroAssembler* masm = &assembler;
151
152  __ mov(a4, a0);
153  for (int i = 0; i < 64; i++) {
154    // Load constant.
155    __ li(a5, Operand(refConstants[i]));
156    __ sd(a5, MemOperand(a4));
157    __ Daddu(a4, a4, Operand(kPointerSize));
158  }
159
160  __ jr(ra);
161  __ nop();
162
163  CodeDesc desc;
164  masm->GetCode(&desc);
165  Handle<Code> code = isolate->factory()->NewCode(
166      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
167
168  ::F f = FUNCTION_CAST< ::F>(code->entry());
169     (void) CALL_GENERATED_CODE(f, reinterpret_cast<int64_t>(result),
170                                0, 0, 0, 0);
171  // Check results.
172  for (int i = 0; i < 64; i++) {
173    CHECK(refConstants[i] == result[i]);
174  }
175}
176
177
178TEST(LoadAddress) {
179  CcTest::InitializeVM();
180  Isolate* isolate = Isolate::Current();
181  HandleScope handles(isolate);
182
183  MacroAssembler assembler(isolate, NULL, 0);
184  MacroAssembler* masm = &assembler;
185  Label to_jump, skip;
186  __ mov(a4, a0);
187
188  __ Branch(&skip);
189  __ bind(&to_jump);
190  __ nop();
191  __ nop();
192  __ jr(ra);
193  __ nop();
194  __ bind(&skip);
195  __ li(a4, Operand(masm->jump_address(&to_jump)), ADDRESS_LOAD);
196  int check_size = masm->InstructionsGeneratedSince(&skip);
197  CHECK_EQ(check_size, 4);
198  __ jr(a4);
199  __ nop();
200  __ stop("invalid");
201  __ stop("invalid");
202  __ stop("invalid");
203  __ stop("invalid");
204  __ stop("invalid");
205
206
207  CodeDesc desc;
208  masm->GetCode(&desc);
209  Handle<Code> code = isolate->factory()->NewCode(
210      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
211
212  ::F f = FUNCTION_CAST< ::F>(code->entry());
213     (void) CALL_GENERATED_CODE(f, 0, 0, 0, 0, 0);
214  // Check results.
215}
216
217#undef __
218