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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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1499 | 1499 |
1500 TEST(Regress621926) { | 1500 TEST(Regress621926) { |
1501 // Bug description: | 1501 // Bug description: |
1502 // The opcodes for cmpw r/m16, r16 and cmpw r16, r/m16 were swapped. | 1502 // The opcodes for cmpw r/m16, r16 and cmpw r16, r/m16 were swapped. |
1503 // This was causing non-commutative comparisons to produce the wrong result. | 1503 // This was causing non-commutative comparisons to produce the wrong result. |
1504 CcTest::InitializeVM(); | 1504 CcTest::InitializeVM(); |
1505 Isolate* isolate = reinterpret_cast<Isolate*>(CcTest::isolate()); | 1505 Isolate* isolate = reinterpret_cast<Isolate*>(CcTest::isolate()); |
1506 HandleScope scope(isolate); | 1506 HandleScope scope(isolate); |
1507 Assembler assm(isolate, nullptr, 0); | 1507 Assembler assm(isolate, nullptr, 0); |
1508 | 1508 |
1509 int16_t a = 42; | 1509 uint16_t a = 42; |
1510 | 1510 |
1511 Label fail; | 1511 Label fail; |
1512 __ push(ebx); | 1512 __ push(ebx); |
1513 __ mov(ebx, Immediate(reinterpret_cast<intptr_t>(&a))); | 1513 __ mov(ebx, Immediate(reinterpret_cast<intptr_t>(&a))); |
1514 __ mov(eax, Immediate(41)); | 1514 __ mov(eax, Immediate(41)); |
1515 __ cmpw(eax, Operand(ebx)); | 1515 __ cmpw(eax, Operand(ebx, 0)); |
1516 __ j(above_equal, &fail); | 1516 __ j(above_equal, &fail); |
1517 __ cmpw(Operand(ebx), eax); | 1517 __ cmpw(Operand(ebx, 0), eax); |
1518 __ j(below_equal, &fail); | 1518 __ j(below_equal, &fail); |
1519 __ mov(eax, 1); | 1519 __ mov(eax, 1); |
1520 __ pop(ebx); | 1520 __ pop(ebx); |
1521 __ ret(0); | 1521 __ ret(0); |
1522 __ bind(&fail); | 1522 __ bind(&fail); |
1523 __ mov(eax, 0); | 1523 __ mov(eax, 0); |
1524 __ pop(ebx); | 1524 __ pop(ebx); |
1525 __ ret(0); | 1525 __ ret(0); |
1526 | 1526 |
1527 CodeDesc desc; | 1527 CodeDesc desc; |
1528 assm.GetCode(&desc); | 1528 assm.GetCode(&desc); |
1529 Handle<Code> code = isolate->factory()->NewCode( | 1529 Handle<Code> code = isolate->factory()->NewCode( |
1530 desc, Code::ComputeFlags(Code::STUB), Handle<Code>()); | 1530 desc, Code::ComputeFlags(Code::STUB), Handle<Code>()); |
1531 | 1531 |
1532 #ifdef OBJECT_PRINT | 1532 #ifdef OBJECT_PRINT |
1533 OFStream os(stdout); | 1533 OFStream os(stdout); |
1534 code->Print(os); | 1534 code->Print(os); |
1535 #endif | 1535 #endif |
1536 | 1536 |
1537 F0 f = FUNCTION_CAST<F0>(code->entry()); | 1537 F0 f = FUNCTION_CAST<F0>(code->entry()); |
1538 CHECK_EQ(f(), 1); | 1538 CHECK_EQ(f(), 1); |
1539 } | 1539 } |
1540 | 1540 |
1541 #undef __ | 1541 #undef __ |
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