2013-07-12 12:28:32 +00:00
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// Copyright 2013 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <stdlib.h>
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2013-07-12 13:45:41 +00:00
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#include <limits>
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2013-07-12 12:28:32 +00:00
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#include "v8.h"
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#include "cctest.h"
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#include "code-stubs.h"
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2013-07-19 08:21:41 +00:00
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#include "test-code-stubs.h"
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2013-07-12 12:28:32 +00:00
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#include "factory.h"
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#include "macro-assembler.h"
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#include "platform.h"
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using namespace v8::internal;
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#define __ assm.
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ConvertDToIFunc MakeConvertDToIFuncTrampoline(Isolate* isolate,
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Register source_reg,
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Register destination_reg) {
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// Allocate an executable page of memory.
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size_t actual_size;
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2013-09-11 18:30:01 +00:00
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byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
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&actual_size,
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true));
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2013-07-12 12:28:32 +00:00
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CHECK(buffer);
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HandleScope handles(isolate);
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MacroAssembler assm(isolate, buffer, static_cast<int>(actual_size));
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assm.set_allow_stub_calls(false);
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int offset =
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source_reg.is(esp) ? 0 : (HeapNumber::kValueOffset - kSmiTagSize);
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DoubleToIStub stub(source_reg, destination_reg, offset, true);
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byte* start = stub.GetCode(isolate)->instruction_start();
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__ push(ebx);
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__ push(ecx);
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__ push(edx);
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__ push(esi);
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__ push(edi);
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if (!source_reg.is(esp)) {
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__ lea(source_reg, MemOperand(esp, 6 * kPointerSize - offset));
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}
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int param_offset = 7 * kPointerSize;
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// Save registers make sure they don't get clobbered.
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int reg_num = 0;
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for (;reg_num < Register::NumAllocatableRegisters(); ++reg_num) {
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Register reg = Register::from_code(reg_num);
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if (!reg.is(esp) && !reg.is(ebp) && !reg.is(destination_reg)) {
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__ push(reg);
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param_offset += kPointerSize;
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}
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}
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// Re-push the double argument
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__ push(MemOperand(esp, param_offset));
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__ push(MemOperand(esp, param_offset));
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// Call through to the actual stub
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__ call(start, RelocInfo::EXTERNAL_REFERENCE);
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__ add(esp, Immediate(kDoubleSize));
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// Make sure no registers have been unexpectedly clobbered
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for (--reg_num; reg_num >= 0; --reg_num) {
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Register reg = Register::from_code(reg_num);
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if (!reg.is(esp) && !reg.is(ebp) && !reg.is(destination_reg)) {
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__ cmp(reg, MemOperand(esp, 0));
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2013-08-02 09:53:11 +00:00
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__ Assert(equal, kRegisterWasClobbered);
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2013-07-12 12:28:32 +00:00
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__ add(esp, Immediate(kPointerSize));
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}
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}
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__ mov(eax, destination_reg);
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__ pop(edi);
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__ pop(esi);
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__ pop(edx);
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__ pop(ecx);
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__ pop(ebx);
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__ ret(kDoubleSize);
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CodeDesc desc;
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assm.GetCode(&desc);
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return reinterpret_cast<ConvertDToIFunc>(
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reinterpret_cast<intptr_t>(buffer));
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}
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#undef __
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static Isolate* GetIsolateFrom(LocalContext* context) {
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return reinterpret_cast<Isolate*>((*context)->GetIsolate());
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}
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TEST(ConvertDToI) {
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CcTest::InitializeVM();
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LocalContext context;
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Isolate* isolate = GetIsolateFrom(&context);
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HandleScope scope(isolate);
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#if DEBUG
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// Verify that the tests actually work with the C version. In the release
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// code, the compiler optimizes it away because it's all constant, but does it
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// wrong, triggering an assert on gcc.
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RunAllTruncationTests(&ConvertDToICVersion);
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#endif
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2013-08-16 11:29:54 +00:00
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Register source_registers[] = {esp, eax, ebx, ecx, edx, edi, esi};
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Register dest_registers[] = {eax, ebx, ecx, edx, edi, esi};
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for (size_t s = 0; s < sizeof(source_registers) / sizeof(Register); s++) {
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for (size_t d = 0; d < sizeof(dest_registers) / sizeof(Register); d++) {
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RunAllTruncationTests(
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MakeConvertDToIFuncTrampoline(isolate,
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source_registers[s],
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dest_registers[d]));
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}
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}
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2013-07-12 12:28:32 +00:00
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}
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