1 // Copyright 2013 the V8 project authors. All rights reserved.
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3 // modification, are permitted provided that the following conditions are
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7 // notice, this list of conditions and the following disclaimer.
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35 #include "code-stubs.h"
36 #include "test-code-stubs.h"
38 #include "macro-assembler.h"
41 using namespace v8::internal;
45 ConvertDToIFunc MakeConvertDToIFuncTrampoline(Isolate* isolate,
47 Register destination_reg) {
48 // Allocate an executable page of memory.
50 byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
54 HandleScope handles(isolate);
55 MacroAssembler assm(isolate, buffer, static_cast<int>(actual_size));
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();
67 if (!source_reg.is(esp)) {
68 __ lea(source_reg, MemOperand(esp, 6 * kPointerSize - offset));
71 int param_offset = 7 * kPointerSize;
72 // Save registers make sure they don't get clobbered.
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)) {
78 param_offset += kPointerSize;
82 // Re-push the double argument
83 __ push(MemOperand(esp, param_offset));
84 __ push(MemOperand(esp, param_offset));
86 // Call through to the actual stub
87 __ call(start, RelocInfo::EXTERNAL_REFERENCE);
89 __ add(esp, Immediate(kDoubleSize));
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));
101 __ mov(eax, destination_reg);
113 return reinterpret_cast<ConvertDToIFunc>(
114 reinterpret_cast<intptr_t>(buffer));
120 static Isolate* GetIsolateFrom(LocalContext* context) {
121 return reinterpret_cast<Isolate*>((*context)->GetIsolate());
126 CcTest::InitializeVM();
127 LocalContext context;
128 Isolate* isolate = GetIsolateFrom(&context);
129 HandleScope scope(isolate);
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);
138 Register source_registers[] = {esp, eax, ebx, ecx, edx, edi, esi};
139 Register dest_registers[] = {eax, ebx, ecx, edx, edi, esi};
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,