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// Copyright 2013 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <stdlib.h>
#include <limits>
#include "src/v8.h"
#include "src/base/platform/platform.h"
#include "src/code-stubs.h"
#include "src/factory.h"
#include "src/macro-assembler.h"
#include "test/cctest/cctest.h"
#include "test/cctest/test-code-stubs.h"
using namespace v8::internal;
#define __ assm.
ConvertDToIFunc MakeConvertDToIFuncTrampoline(Isolate* isolate,
Register source_reg,
Register destination_reg) {
// Allocate an executable page of memory.
size_t actual_size;
byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
Assembler::kMinimalBufferSize, &actual_size, true));
CHECK(buffer);
HandleScope handles(isolate);
MacroAssembler assm(isolate, buffer, static_cast<int>(actual_size),
v8::internal::CodeObjectRequired::kYes);
int offset =
source_reg.is(esp) ? 0 : (HeapNumber::kValueOffset - kSmiTagSize);
DoubleToIStub stub(isolate, source_reg, destination_reg, offset, true);
byte* start = stub.GetCode()->instruction_start();
__ push(ebx);
__ push(ecx);
__ push(edx);
__ push(esi);
__ push(edi);
if (!source_reg.is(esp)) {
__ lea(source_reg, MemOperand(esp, 6 * kPointerSize - offset));
}
int param_offset = 7 * kPointerSize;
// Save registers make sure they don't get clobbered.
int reg_num = 0;
for (; reg_num < Register::kNumRegisters; ++reg_num) {
if (RegisterConfiguration::Crankshaft()->IsAllocatableGeneralCode(
reg_num)) {
Register reg = Register::from_code(reg_num);
if (!reg.is(esp) && !reg.is(ebp) && !reg.is(destination_reg)) {
__ push(reg);
param_offset += kPointerSize;
}
}
}
// Re-push the double argument
__ push(MemOperand(esp, param_offset));
__ push(MemOperand(esp, param_offset));
// Call through to the actual stub
__ call(start, RelocInfo::EXTERNAL_REFERENCE);
__ add(esp, Immediate(kDoubleSize));
// Make sure no registers have been unexpectedly clobbered
for (--reg_num; reg_num >= 0; --reg_num) {
if (RegisterConfiguration::Crankshaft()->IsAllocatableGeneralCode(
reg_num)) {
Register reg = Register::from_code(reg_num);
if (!reg.is(esp) && !reg.is(ebp) && !reg.is(destination_reg)) {
__ cmp(reg, MemOperand(esp, 0));
__ Assert(equal, kRegisterWasClobbered);
__ add(esp, Immediate(kPointerSize));
}
}
}
__ mov(eax, destination_reg);
__ pop(edi);
__ pop(esi);
__ pop(edx);
__ pop(ecx);
__ pop(ebx);
__ ret(kDoubleSize);
CodeDesc desc;
assm.GetCode(&desc);
return reinterpret_cast<ConvertDToIFunc>(
reinterpret_cast<intptr_t>(buffer));
}
#undef __
static Isolate* GetIsolateFrom(LocalContext* context) {
return reinterpret_cast<Isolate*>((*context)->GetIsolate());
}
TEST(ConvertDToI) {
CcTest::InitializeVM();
LocalContext context;
Isolate* isolate = GetIsolateFrom(&context);
HandleScope scope(isolate);
#if DEBUG
// Verify that the tests actually work with the C version. In the release
// code, the compiler optimizes it away because it's all constant, but does it
// wrong, triggering an assert on gcc.
RunAllTruncationTests(&ConvertDToICVersion);
#endif
Register source_registers[] = {esp, eax, ebx, ecx, edx, edi, esi};
Register dest_registers[] = {eax, ebx, ecx, edx, edi, esi};
for (size_t s = 0; s < sizeof(source_registers) / sizeof(Register); s++) {
for (size_t d = 0; d < sizeof(dest_registers) / sizeof(Register); d++) {
RunAllTruncationTests(
MakeConvertDToIFuncTrampoline(isolate,
source_registers[s],
dest_registers[d]));
}
}
}
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