1 // Copyright 2013 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 <limits> 31 32 #include "src/v8.h" 33 34 #include "src/code-stubs.h" 35 #include "src/factory.h" 36 #include "src/macro-assembler.h" 37 #include "src/platform.h" 38 #include "test/cctest/cctest.h" 39 #include "test/cctest/test-code-stubs.h" 40 41 using namespace v8::internal; 42 43 #define __ assm. 44 45 ConvertDToIFunc MakeConvertDToIFuncTrampoline(Isolate* isolate, 46 Register source_reg, 47 Register destination_reg) { 48 // Allocate an executable page of memory. 49 size_t actual_size; 50 byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize, 51 &actual_size, 52 true)); 53 CHECK(buffer); 54 HandleScope handles(isolate); 55 MacroAssembler assm(isolate, buffer, static_cast<int>(actual_size)); 56 int offset = 57 source_reg.is(esp) ? 0 : (HeapNumber::kValueOffset - kSmiTagSize); 58 DoubleToIStub stub(isolate, source_reg, destination_reg, offset, true); 59 byte* start = stub.GetCode()->instruction_start(); 60 61 __ push(ebx); 62 __ push(ecx); 63 __ push(edx); 64 __ push(esi); 65 __ push(edi); 66 67 if (!source_reg.is(esp)) { 68 __ lea(source_reg, MemOperand(esp, 6 * kPointerSize - offset)); 69 } 70 71 int param_offset = 7 * kPointerSize; 72 // Save registers make sure they don't get clobbered. 73 int reg_num = 0; 74 for (;reg_num < Register::NumAllocatableRegisters(); ++reg_num) { 75 Register reg = Register::FromAllocationIndex(reg_num); 76 if (!reg.is(esp) && !reg.is(ebp) && !reg.is(destination_reg)) { 77 __ push(reg); 78 param_offset += kPointerSize; 79 } 80 } 81 82 // Re-push the double argument 83 __ push(MemOperand(esp, param_offset)); 84 __ push(MemOperand(esp, param_offset)); 85 86 // Call through to the actual stub 87 __ call(start, RelocInfo::EXTERNAL_REFERENCE); 88 89 __ add(esp, Immediate(kDoubleSize)); 90 91 // Make sure no registers have been unexpectedly clobbered 92 for (--reg_num; reg_num >= 0; --reg_num) { 93 Register reg = Register::FromAllocationIndex(reg_num); 94 if (!reg.is(esp) && !reg.is(ebp) && !reg.is(destination_reg)) { 95 __ cmp(reg, MemOperand(esp, 0)); 96 __ Assert(equal, kRegisterWasClobbered); 97 __ add(esp, Immediate(kPointerSize)); 98 } 99 } 100 101 __ mov(eax, destination_reg); 102 103 __ pop(edi); 104 __ pop(esi); 105 __ pop(edx); 106 __ pop(ecx); 107 __ pop(ebx); 108 109 __ ret(kDoubleSize); 110 111 CodeDesc desc; 112 assm.GetCode(&desc); 113 return reinterpret_cast<ConvertDToIFunc>( 114 reinterpret_cast<intptr_t>(buffer)); 115 } 116 117 #undef __ 118 119 120 static Isolate* GetIsolateFrom(LocalContext* context) { 121 return reinterpret_cast<Isolate*>((*context)->GetIsolate()); 122 } 123 124 125 TEST(ConvertDToI) { 126 CcTest::InitializeVM(); 127 LocalContext context; 128 Isolate* isolate = GetIsolateFrom(&context); 129 HandleScope scope(isolate); 130 131 #if DEBUG 132 // Verify that the tests actually work with the C version. In the release 133 // code, the compiler optimizes it away because it's all constant, but does it 134 // wrong, triggering an assert on gcc. 135 RunAllTruncationTests(&ConvertDToICVersion); 136 #endif 137 138 Register source_registers[] = {esp, eax, ebx, ecx, edx, edi, esi}; 139 Register dest_registers[] = {eax, ebx, ecx, edx, edi, esi}; 140 141 for (size_t s = 0; s < sizeof(source_registers) / sizeof(Register); s++) { 142 for (size_t d = 0; d < sizeof(dest_registers) / sizeof(Register); d++) { 143 RunAllTruncationTests( 144 MakeConvertDToIFuncTrampoline(isolate, 145 source_registers[s], 146 dest_registers[d])); 147 } 148 } 149 } 150