1 // Copyright 2009 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
4 // met:
5 //
6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution.
12 // * Neither the name of Google Inc. nor the names of its
13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission.
15 //
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28 #include <stdlib.h>
29
30 #include "src/v8.h"
31
32 #include "src/base/platform/platform.h"
33 #include "src/factory.h"
34 #include "src/macro-assembler.h"
35 #include "src/ostreams.h"
36 #include "src/serialize.h"
37 #include "test/cctest/cctest.h"
38
39 using namespace v8::internal;
40
41 // Test the x64 assembler by compiling some simple functions into
42 // a buffer and executing them. These tests do not initialize the
43 // V8 library, create a context, or use any V8 objects.
44 // The AMD64 calling convention is used, with the first six arguments
45 // in RDI, RSI, RDX, RCX, R8, and R9, and floating point arguments in
46 // the XMM registers. The return value is in RAX.
47 // This calling convention is used on Linux, with GCC, and on Mac OS,
48 // with GCC. A different convention is used on 64-bit windows,
49 // where the first four integer arguments are passed in RCX, RDX, R8 and R9.
50
51 typedef int (*F0)();
52 typedef int (*F1)(int64_t x);
53 typedef int (*F2)(int64_t x, int64_t y);
54 typedef int (*F3)(double x);
55 typedef int64_t (*F4)(int64_t* x, int64_t* y);
56 typedef int64_t (*F5)(int64_t x);
57
58 #ifdef _WIN64
59 static const Register arg1 = rcx;
60 static const Register arg2 = rdx;
61 #else
62 static const Register arg1 = rdi;
63 static const Register arg2 = rsi;
64 #endif
65
66 #define __ assm.
67
68
TEST(AssemblerX64ReturnOperation)69 TEST(AssemblerX64ReturnOperation) {
70 CcTest::InitializeVM();
71 // Allocate an executable page of memory.
72 size_t actual_size;
73 byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
74 Assembler::kMinimalBufferSize, &actual_size, true));
75 CHECK(buffer);
76 Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
77
78 // Assemble a simple function that copies argument 2 and returns it.
79 __ movq(rax, arg2);
80 __ nop();
81 __ ret(0);
82
83 CodeDesc desc;
84 assm.GetCode(&desc);
85 // Call the function from C++.
86 int result = FUNCTION_CAST<F2>(buffer)(3, 2);
87 CHECK_EQ(2, result);
88 }
89
90
TEST(AssemblerX64StackOperations)91 TEST(AssemblerX64StackOperations) {
92 CcTest::InitializeVM();
93 // Allocate an executable page of memory.
94 size_t actual_size;
95 byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
96 Assembler::kMinimalBufferSize, &actual_size, true));
97 CHECK(buffer);
98 Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
99
100 // Assemble a simple function that copies argument 2 and returns it.
101 // We compile without stack frame pointers, so the gdb debugger shows
102 // incorrect stack frames when debugging this function (which has them).
103 __ pushq(rbp);
104 __ movq(rbp, rsp);
105 __ pushq(arg2); // Value at (rbp - 8)
106 __ pushq(arg2); // Value at (rbp - 16)
107 __ pushq(arg1); // Value at (rbp - 24)
108 __ popq(rax);
109 __ popq(rax);
110 __ popq(rax);
111 __ popq(rbp);
112 __ nop();
113 __ ret(0);
114
115 CodeDesc desc;
116 assm.GetCode(&desc);
117 // Call the function from C++.
118 int result = FUNCTION_CAST<F2>(buffer)(3, 2);
119 CHECK_EQ(2, result);
120 }
121
122
TEST(AssemblerX64ArithmeticOperations)123 TEST(AssemblerX64ArithmeticOperations) {
124 CcTest::InitializeVM();
125 // Allocate an executable page of memory.
126 size_t actual_size;
127 byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
128 Assembler::kMinimalBufferSize, &actual_size, true));
129 CHECK(buffer);
130 Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
131
132 // Assemble a simple function that adds arguments returning the sum.
133 __ movq(rax, arg2);
134 __ addq(rax, arg1);
135 __ ret(0);
136
137 CodeDesc desc;
138 assm.GetCode(&desc);
139 // Call the function from C++.
140 int result = FUNCTION_CAST<F2>(buffer)(3, 2);
141 CHECK_EQ(5, result);
142 }
143
144
TEST(AssemblerX64CmpbOperation)145 TEST(AssemblerX64CmpbOperation) {
146 CcTest::InitializeVM();
147 // Allocate an executable page of memory.
148 size_t actual_size;
149 byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
150 Assembler::kMinimalBufferSize, &actual_size, true));
151 CHECK(buffer);
152 Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
153
154 // Assemble a function that compare argument byte returing 1 if equal else 0.
155 // On Windows, it compares rcx with rdx which does not require REX prefix;
156 // on Linux, it compares rdi with rsi which requires REX prefix.
157
158 Label done;
159 __ movq(rax, Immediate(1));
160 __ cmpb(arg1, arg2);
161 __ j(equal, &done);
162 __ movq(rax, Immediate(0));
163 __ bind(&done);
164 __ ret(0);
165
166 CodeDesc desc;
167 assm.GetCode(&desc);
168 // Call the function from C++.
169 int result = FUNCTION_CAST<F2>(buffer)(0x1002, 0x2002);
170 CHECK_EQ(1, result);
171 result = FUNCTION_CAST<F2>(buffer)(0x1002, 0x2003);
172 CHECK_EQ(0, result);
173 }
174
175
TEST(AssemblerX64ImulOperation)176 TEST(AssemblerX64ImulOperation) {
177 CcTest::InitializeVM();
178 // Allocate an executable page of memory.
179 size_t actual_size;
180 byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
181 Assembler::kMinimalBufferSize, &actual_size, true));
182 CHECK(buffer);
183 Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
184
185 // Assemble a simple function that multiplies arguments returning the high
186 // word.
187 __ movq(rax, arg2);
188 __ imulq(arg1);
189 __ movq(rax, rdx);
190 __ ret(0);
191
192 CodeDesc desc;
193 assm.GetCode(&desc);
194 // Call the function from C++.
195 int result = FUNCTION_CAST<F2>(buffer)(3, 2);
196 CHECK_EQ(0, result);
197 result = FUNCTION_CAST<F2>(buffer)(0x100000000l, 0x100000000l);
198 CHECK_EQ(1, result);
199 result = FUNCTION_CAST<F2>(buffer)(-0x100000000l, 0x100000000l);
200 CHECK_EQ(-1, result);
201 }
202
203
TEST(AssemblerX64XchglOperations)204 TEST(AssemblerX64XchglOperations) {
205 CcTest::InitializeVM();
206 // Allocate an executable page of memory.
207 size_t actual_size;
208 byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
209 Assembler::kMinimalBufferSize, &actual_size, true));
210 CHECK(buffer);
211 Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
212
213 __ movq(rax, Operand(arg1, 0));
214 __ movq(r11, Operand(arg2, 0));
215 __ xchgl(rax, r11);
216 __ movq(Operand(arg1, 0), rax);
217 __ movq(Operand(arg2, 0), r11);
218 __ ret(0);
219
220 CodeDesc desc;
221 assm.GetCode(&desc);
222 // Call the function from C++.
223 int64_t left = V8_2PART_UINT64_C(0x10000000, 20000000);
224 int64_t right = V8_2PART_UINT64_C(0x30000000, 40000000);
225 int64_t result = FUNCTION_CAST<F4>(buffer)(&left, &right);
226 CHECK_EQ(V8_2PART_UINT64_C(0x00000000, 40000000), left);
227 CHECK_EQ(V8_2PART_UINT64_C(0x00000000, 20000000), right);
228 USE(result);
229 }
230
231
TEST(AssemblerX64OrlOperations)232 TEST(AssemblerX64OrlOperations) {
233 CcTest::InitializeVM();
234 // Allocate an executable page of memory.
235 size_t actual_size;
236 byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
237 Assembler::kMinimalBufferSize, &actual_size, true));
238 CHECK(buffer);
239 Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
240
241 __ movq(rax, Operand(arg2, 0));
242 __ orl(Operand(arg1, 0), rax);
243 __ ret(0);
244
245 CodeDesc desc;
246 assm.GetCode(&desc);
247 // Call the function from C++.
248 int64_t left = V8_2PART_UINT64_C(0x10000000, 20000000);
249 int64_t right = V8_2PART_UINT64_C(0x30000000, 40000000);
250 int64_t result = FUNCTION_CAST<F4>(buffer)(&left, &right);
251 CHECK_EQ(V8_2PART_UINT64_C(0x10000000, 60000000), left);
252 USE(result);
253 }
254
255
TEST(AssemblerX64RollOperations)256 TEST(AssemblerX64RollOperations) {
257 CcTest::InitializeVM();
258 // Allocate an executable page of memory.
259 size_t actual_size;
260 byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
261 Assembler::kMinimalBufferSize, &actual_size, true));
262 CHECK(buffer);
263 Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
264
265 __ movq(rax, arg1);
266 __ roll(rax, Immediate(1));
267 __ ret(0);
268
269 CodeDesc desc;
270 assm.GetCode(&desc);
271 // Call the function from C++.
272 int64_t src = V8_2PART_UINT64_C(0x10000000, C0000000);
273 int64_t result = FUNCTION_CAST<F5>(buffer)(src);
274 CHECK_EQ(V8_2PART_UINT64_C(0x00000000, 80000001), result);
275 }
276
277
TEST(AssemblerX64SublOperations)278 TEST(AssemblerX64SublOperations) {
279 CcTest::InitializeVM();
280 // Allocate an executable page of memory.
281 size_t actual_size;
282 byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
283 Assembler::kMinimalBufferSize, &actual_size, true));
284 CHECK(buffer);
285 Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
286
287 __ movq(rax, Operand(arg2, 0));
288 __ subl(Operand(arg1, 0), rax);
289 __ ret(0);
290
291 CodeDesc desc;
292 assm.GetCode(&desc);
293 // Call the function from C++.
294 int64_t left = V8_2PART_UINT64_C(0x10000000, 20000000);
295 int64_t right = V8_2PART_UINT64_C(0x30000000, 40000000);
296 int64_t result = FUNCTION_CAST<F4>(buffer)(&left, &right);
297 CHECK_EQ(V8_2PART_UINT64_C(0x10000000, e0000000), left);
298 USE(result);
299 }
300
301
TEST(AssemblerX64TestlOperations)302 TEST(AssemblerX64TestlOperations) {
303 CcTest::InitializeVM();
304 // Allocate an executable page of memory.
305 size_t actual_size;
306 byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
307 Assembler::kMinimalBufferSize, &actual_size, true));
308 CHECK(buffer);
309 Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
310
311 // Set rax with the ZF flag of the testl instruction.
312 Label done;
313 __ movq(rax, Immediate(1));
314 __ movq(r11, Operand(arg2, 0));
315 __ testl(Operand(arg1, 0), r11);
316 __ j(zero, &done, Label::kNear);
317 __ movq(rax, Immediate(0));
318 __ bind(&done);
319 __ ret(0);
320
321 CodeDesc desc;
322 assm.GetCode(&desc);
323 // Call the function from C++.
324 int64_t left = V8_2PART_UINT64_C(0x10000000, 20000000);
325 int64_t right = V8_2PART_UINT64_C(0x30000000, 00000000);
326 int64_t result = FUNCTION_CAST<F4>(buffer)(&left, &right);
327 CHECK_EQ(static_cast<int64_t>(1), result);
328 }
329
330
TEST(AssemblerX64XorlOperations)331 TEST(AssemblerX64XorlOperations) {
332 CcTest::InitializeVM();
333 // Allocate an executable page of memory.
334 size_t actual_size;
335 byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
336 Assembler::kMinimalBufferSize, &actual_size, true));
337 CHECK(buffer);
338 Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
339
340 __ movq(rax, Operand(arg2, 0));
341 __ xorl(Operand(arg1, 0), rax);
342 __ ret(0);
343
344 CodeDesc desc;
345 assm.GetCode(&desc);
346 // Call the function from C++.
347 int64_t left = V8_2PART_UINT64_C(0x10000000, 20000000);
348 int64_t right = V8_2PART_UINT64_C(0x30000000, 60000000);
349 int64_t result = FUNCTION_CAST<F4>(buffer)(&left, &right);
350 CHECK_EQ(V8_2PART_UINT64_C(0x10000000, 40000000), left);
351 USE(result);
352 }
353
354
TEST(AssemblerX64MemoryOperands)355 TEST(AssemblerX64MemoryOperands) {
356 CcTest::InitializeVM();
357 // Allocate an executable page of memory.
358 size_t actual_size;
359 byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
360 Assembler::kMinimalBufferSize, &actual_size, true));
361 CHECK(buffer);
362 Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
363
364 // Assemble a simple function that copies argument 2 and returns it.
365 __ pushq(rbp);
366 __ movq(rbp, rsp);
367
368 __ pushq(arg2); // Value at (rbp - 8)
369 __ pushq(arg2); // Value at (rbp - 16)
370 __ pushq(arg1); // Value at (rbp - 24)
371
372 const int kStackElementSize = 8;
373 __ movq(rax, Operand(rbp, -3 * kStackElementSize));
374 __ popq(arg2);
375 __ popq(arg2);
376 __ popq(arg2);
377 __ popq(rbp);
378 __ nop();
379 __ ret(0);
380
381 CodeDesc desc;
382 assm.GetCode(&desc);
383 // Call the function from C++.
384 int result = FUNCTION_CAST<F2>(buffer)(3, 2);
385 CHECK_EQ(3, result);
386 }
387
388
TEST(AssemblerX64ControlFlow)389 TEST(AssemblerX64ControlFlow) {
390 CcTest::InitializeVM();
391 // Allocate an executable page of memory.
392 size_t actual_size;
393 byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
394 Assembler::kMinimalBufferSize, &actual_size, true));
395 CHECK(buffer);
396 Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
397
398 // Assemble a simple function that copies argument 1 and returns it.
399 __ pushq(rbp);
400
401 __ movq(rbp, rsp);
402 __ movq(rax, arg1);
403 Label target;
404 __ jmp(&target);
405 __ movq(rax, arg2);
406 __ bind(&target);
407 __ popq(rbp);
408 __ ret(0);
409
410 CodeDesc desc;
411 assm.GetCode(&desc);
412 // Call the function from C++.
413 int result = FUNCTION_CAST<F2>(buffer)(3, 2);
414 CHECK_EQ(3, result);
415 }
416
417
TEST(AssemblerX64LoopImmediates)418 TEST(AssemblerX64LoopImmediates) {
419 CcTest::InitializeVM();
420 // Allocate an executable page of memory.
421 size_t actual_size;
422 byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
423 Assembler::kMinimalBufferSize, &actual_size, true));
424 CHECK(buffer);
425 Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
426 // Assemble two loops using rax as counter, and verify the ending counts.
427 Label Fail;
428 __ movq(rax, Immediate(-3));
429 Label Loop1_test;
430 Label Loop1_body;
431 __ jmp(&Loop1_test);
432 __ bind(&Loop1_body);
433 __ addq(rax, Immediate(7));
434 __ bind(&Loop1_test);
435 __ cmpq(rax, Immediate(20));
436 __ j(less_equal, &Loop1_body);
437 // Did the loop terminate with the expected value?
438 __ cmpq(rax, Immediate(25));
439 __ j(not_equal, &Fail);
440
441 Label Loop2_test;
442 Label Loop2_body;
443 __ movq(rax, Immediate(0x11FEED00));
444 __ jmp(&Loop2_test);
445 __ bind(&Loop2_body);
446 __ addq(rax, Immediate(-0x1100));
447 __ bind(&Loop2_test);
448 __ cmpq(rax, Immediate(0x11FE8000));
449 __ j(greater, &Loop2_body);
450 // Did the loop terminate with the expected value?
451 __ cmpq(rax, Immediate(0x11FE7600));
452 __ j(not_equal, &Fail);
453
454 __ movq(rax, Immediate(1));
455 __ ret(0);
456 __ bind(&Fail);
457 __ movq(rax, Immediate(0));
458 __ ret(0);
459
460 CodeDesc desc;
461 assm.GetCode(&desc);
462 // Call the function from C++.
463 int result = FUNCTION_CAST<F0>(buffer)();
464 CHECK_EQ(1, result);
465 }
466
467
TEST(OperandRegisterDependency)468 TEST(OperandRegisterDependency) {
469 int offsets[4] = {0, 1, 0xfed, 0xbeefcad};
470 for (int i = 0; i < 4; i++) {
471 int offset = offsets[i];
472 CHECK(Operand(rax, offset).AddressUsesRegister(rax));
473 CHECK(!Operand(rax, offset).AddressUsesRegister(r8));
474 CHECK(!Operand(rax, offset).AddressUsesRegister(rcx));
475
476 CHECK(Operand(rax, rax, times_1, offset).AddressUsesRegister(rax));
477 CHECK(!Operand(rax, rax, times_1, offset).AddressUsesRegister(r8));
478 CHECK(!Operand(rax, rax, times_1, offset).AddressUsesRegister(rcx));
479
480 CHECK(Operand(rax, rcx, times_1, offset).AddressUsesRegister(rax));
481 CHECK(Operand(rax, rcx, times_1, offset).AddressUsesRegister(rcx));
482 CHECK(!Operand(rax, rcx, times_1, offset).AddressUsesRegister(r8));
483 CHECK(!Operand(rax, rcx, times_1, offset).AddressUsesRegister(r9));
484 CHECK(!Operand(rax, rcx, times_1, offset).AddressUsesRegister(rdx));
485 CHECK(!Operand(rax, rcx, times_1, offset).AddressUsesRegister(rsp));
486
487 CHECK(Operand(rsp, offset).AddressUsesRegister(rsp));
488 CHECK(!Operand(rsp, offset).AddressUsesRegister(rax));
489 CHECK(!Operand(rsp, offset).AddressUsesRegister(r15));
490
491 CHECK(Operand(rbp, offset).AddressUsesRegister(rbp));
492 CHECK(!Operand(rbp, offset).AddressUsesRegister(rax));
493 CHECK(!Operand(rbp, offset).AddressUsesRegister(r13));
494
495 CHECK(Operand(rbp, rax, times_1, offset).AddressUsesRegister(rbp));
496 CHECK(Operand(rbp, rax, times_1, offset).AddressUsesRegister(rax));
497 CHECK(!Operand(rbp, rax, times_1, offset).AddressUsesRegister(rcx));
498 CHECK(!Operand(rbp, rax, times_1, offset).AddressUsesRegister(r13));
499 CHECK(!Operand(rbp, rax, times_1, offset).AddressUsesRegister(r8));
500 CHECK(!Operand(rbp, rax, times_1, offset).AddressUsesRegister(rsp));
501
502 CHECK(Operand(rsp, rbp, times_1, offset).AddressUsesRegister(rsp));
503 CHECK(Operand(rsp, rbp, times_1, offset).AddressUsesRegister(rbp));
504 CHECK(!Operand(rsp, rbp, times_1, offset).AddressUsesRegister(rax));
505 CHECK(!Operand(rsp, rbp, times_1, offset).AddressUsesRegister(r15));
506 CHECK(!Operand(rsp, rbp, times_1, offset).AddressUsesRegister(r13));
507 }
508 }
509
510
TEST(AssemblerX64LabelChaining)511 TEST(AssemblerX64LabelChaining) {
512 // Test chaining of label usages within instructions (issue 1644).
513 CcTest::InitializeVM();
514 v8::HandleScope scope(CcTest::isolate());
515 Assembler assm(CcTest::i_isolate(), NULL, 0);
516
517 Label target;
518 __ j(equal, &target);
519 __ j(not_equal, &target);
520 __ bind(&target);
521 __ nop();
522 }
523
524
TEST(AssemblerMultiByteNop)525 TEST(AssemblerMultiByteNop) {
526 CcTest::InitializeVM();
527 v8::HandleScope scope(CcTest::isolate());
528 byte buffer[1024];
529 Isolate* isolate = CcTest::i_isolate();
530 Assembler assm(isolate, buffer, sizeof(buffer));
531 __ pushq(rbx);
532 __ pushq(rcx);
533 __ pushq(rdx);
534 __ pushq(rdi);
535 __ pushq(rsi);
536 __ movq(rax, Immediate(1));
537 __ movq(rbx, Immediate(2));
538 __ movq(rcx, Immediate(3));
539 __ movq(rdx, Immediate(4));
540 __ movq(rdi, Immediate(5));
541 __ movq(rsi, Immediate(6));
542 for (int i = 0; i < 16; i++) {
543 int before = assm.pc_offset();
544 __ Nop(i);
545 CHECK_EQ(assm.pc_offset() - before, i);
546 }
547
548 Label fail;
549 __ cmpq(rax, Immediate(1));
550 __ j(not_equal, &fail);
551 __ cmpq(rbx, Immediate(2));
552 __ j(not_equal, &fail);
553 __ cmpq(rcx, Immediate(3));
554 __ j(not_equal, &fail);
555 __ cmpq(rdx, Immediate(4));
556 __ j(not_equal, &fail);
557 __ cmpq(rdi, Immediate(5));
558 __ j(not_equal, &fail);
559 __ cmpq(rsi, Immediate(6));
560 __ j(not_equal, &fail);
561 __ movq(rax, Immediate(42));
562 __ popq(rsi);
563 __ popq(rdi);
564 __ popq(rdx);
565 __ popq(rcx);
566 __ popq(rbx);
567 __ ret(0);
568 __ bind(&fail);
569 __ movq(rax, Immediate(13));
570 __ popq(rsi);
571 __ popq(rdi);
572 __ popq(rdx);
573 __ popq(rcx);
574 __ popq(rbx);
575 __ ret(0);
576
577 CodeDesc desc;
578 assm.GetCode(&desc);
579 Handle<Code> code = isolate->factory()->NewCode(
580 desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
581
582 F0 f = FUNCTION_CAST<F0>(code->entry());
583 int res = f();
584 CHECK_EQ(42, res);
585 }
586
587
588 #ifdef __GNUC__
589 #define ELEMENT_COUNT 4
590
DoSSE2(const v8::FunctionCallbackInfo<v8::Value> & args)591 void DoSSE2(const v8::FunctionCallbackInfo<v8::Value>& args) {
592 v8::HandleScope scope(CcTest::isolate());
593 byte buffer[1024];
594
595 CHECK(args[0]->IsArray());
596 v8::Local<v8::Array> vec = v8::Local<v8::Array>::Cast(args[0]);
597 CHECK_EQ(ELEMENT_COUNT, vec->Length());
598
599 Isolate* isolate = CcTest::i_isolate();
600 Assembler assm(isolate, buffer, sizeof(buffer));
601
602 // Remove return address from the stack for fix stack frame alignment.
603 __ popq(rcx);
604
605 // Store input vector on the stack.
606 for (int i = 0; i < ELEMENT_COUNT; i++) {
607 __ movl(rax, Immediate(vec->Get(i)->Int32Value()));
608 __ shlq(rax, Immediate(0x20));
609 __ orq(rax, Immediate(vec->Get(++i)->Int32Value()));
610 __ pushq(rax);
611 }
612
613 // Read vector into a xmm register.
614 __ xorps(xmm0, xmm0);
615 __ movdqa(xmm0, Operand(rsp, 0));
616 // Create mask and store it in the return register.
617 __ movmskps(rax, xmm0);
618
619 // Remove unused data from the stack.
620 __ addq(rsp, Immediate(ELEMENT_COUNT * sizeof(int32_t)));
621 // Restore return address.
622 __ pushq(rcx);
623
624 __ ret(0);
625
626 CodeDesc desc;
627 assm.GetCode(&desc);
628 Handle<Code> code = isolate->factory()->NewCode(
629 desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
630
631 F0 f = FUNCTION_CAST<F0>(code->entry());
632 int res = f();
633 args.GetReturnValue().Set(v8::Integer::New(CcTest::isolate(), res));
634 }
635
636
TEST(StackAlignmentForSSE2)637 TEST(StackAlignmentForSSE2) {
638 CcTest::InitializeVM();
639 CHECK_EQ(0, v8::base::OS::ActivationFrameAlignment() % 16);
640
641 v8::Isolate* isolate = CcTest::isolate();
642 v8::HandleScope handle_scope(isolate);
643 v8::Handle<v8::ObjectTemplate> global_template =
644 v8::ObjectTemplate::New(isolate);
645 global_template->Set(v8_str("do_sse2"),
646 v8::FunctionTemplate::New(isolate, DoSSE2));
647
648 LocalContext env(NULL, global_template);
649 CompileRun(
650 "function foo(vec) {"
651 " return do_sse2(vec);"
652 "}");
653
654 v8::Local<v8::Object> global_object = env->Global();
655 v8::Local<v8::Function> foo =
656 v8::Local<v8::Function>::Cast(global_object->Get(v8_str("foo")));
657
658 int32_t vec[ELEMENT_COUNT] = { -1, 1, 1, 1 };
659 v8::Local<v8::Array> v8_vec = v8::Array::New(isolate, ELEMENT_COUNT);
660 for (int i = 0; i < ELEMENT_COUNT; i++) {
661 v8_vec->Set(i, v8_num(vec[i]));
662 }
663
664 v8::Local<v8::Value> args[] = { v8_vec };
665 v8::Local<v8::Value> result = foo->Call(global_object, 1, args);
666
667 // The mask should be 0b1000.
668 CHECK_EQ(8, result->Int32Value());
669 }
670
671 #undef ELEMENT_COUNT
672 #endif // __GNUC__
673
674
TEST(AssemblerX64Extractps)675 TEST(AssemblerX64Extractps) {
676 CcTest::InitializeVM();
677 if (!CpuFeatures::IsSupported(SSE4_1)) return;
678
679 v8::HandleScope scope(CcTest::isolate());
680 byte buffer[256];
681 Isolate* isolate = CcTest::i_isolate();
682 Assembler assm(isolate, buffer, sizeof(buffer));
683 { CpuFeatureScope fscope2(&assm, SSE4_1);
684 __ extractps(rax, xmm0, 0x1);
685 __ ret(0);
686 }
687
688 CodeDesc desc;
689 assm.GetCode(&desc);
690 Handle<Code> code = isolate->factory()->NewCode(
691 desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
692 #ifdef OBJECT_PRINT
693 OFStream os(stdout);
694 code->Print(os);
695 #endif
696
697 F3 f = FUNCTION_CAST<F3>(code->entry());
698 uint64_t value1 = V8_2PART_UINT64_C(0x12345678, 87654321);
699 CHECK_EQ(0x12345678, f(uint64_to_double(value1)));
700 uint64_t value2 = V8_2PART_UINT64_C(0x87654321, 12345678);
701 CHECK_EQ(0x87654321, f(uint64_to_double(value2)));
702 }
703
704
705 typedef int (*F6)(float x, float y);
TEST(AssemblerX64SSE)706 TEST(AssemblerX64SSE) {
707 CcTest::InitializeVM();
708
709 Isolate* isolate = reinterpret_cast<Isolate*>(CcTest::isolate());
710 HandleScope scope(isolate);
711 v8::internal::byte buffer[256];
712 MacroAssembler assm(isolate, buffer, sizeof buffer);
713 {
714 __ shufps(xmm0, xmm0, 0x0); // brocast first argument
715 __ shufps(xmm1, xmm1, 0x0); // brocast second argument
716 __ movaps(xmm2, xmm1);
717 __ addps(xmm2, xmm0);
718 __ mulps(xmm2, xmm1);
719 __ subps(xmm2, xmm0);
720 __ divps(xmm2, xmm1);
721 __ cvttss2si(rax, xmm2);
722 __ ret(0);
723 }
724
725 CodeDesc desc;
726 assm.GetCode(&desc);
727 Handle<Code> code = isolate->factory()->NewCode(
728 desc,
729 Code::ComputeFlags(Code::STUB),
730 Handle<Code>());
731 #ifdef OBJECT_PRINT
732 OFStream os(stdout);
733 code->Print(os);
734 #endif
735
736 F6 f = FUNCTION_CAST<F6>(code->entry());
737 CHECK_EQ(2, f(1.0, 2.0));
738 }
739 #undef __
740