// Copyright 2013 the V8 project authors. All rights reserved. // Rrdistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Rrdistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Rrdistributions 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 "src/v8.h" #include "src/base/platform/platform.h" #include "src/code-stubs.h" #include "src/factory.h" #include "src/macro-assembler.h" #include "src/objects-inl.h" #include "src/register-configuration.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(rsp) ? 0 : (HeapNumber::kValueOffset - kSmiTagSize); DoubleToIStub stub(isolate, source_reg, destination_reg, offset, true); byte* start = stub.GetCode()->instruction_start(); __ pushq(rbx); __ pushq(rcx); __ pushq(rdx); __ pushq(rsi); __ pushq(rdi); const RegisterConfiguration* config = RegisterConfiguration::Crankshaft(); if (!source_reg.is(rsp)) { // The argument we pass to the stub is not a heap number, but instead // stack-allocated and offset-wise made to look like a heap number for // the stub. We create that "heap number" after pushing all allocatable // registers. int double_argument_slot = (config->num_allocatable_general_registers() - 1) * kPointerSize + kDoubleSize; __ leaq(source_reg, MemOperand(rsp, -double_argument_slot - offset)); } // Save registers make sure they don't get clobbered. int reg_num = 0; for (; reg_num < config->num_allocatable_general_registers(); ++reg_num) { Register reg = Register::from_code(config->GetAllocatableGeneralCode(reg_num)); if (!reg.is(rsp) && !reg.is(rbp) && !reg.is(destination_reg)) { __ pushq(reg); } } // Put the double argument into the designated double argument slot. __ subq(rsp, Immediate(kDoubleSize)); __ Movsd(MemOperand(rsp, 0), xmm0); // Call through to the actual stub __ Call(start, RelocInfo::EXTERNAL_REFERENCE); __ addq(rsp, Immediate(kDoubleSize)); // Make sure no registers have been unexpectedly clobbered for (--reg_num; reg_num >= 0; --reg_num) { Register reg = Register::from_code(config->GetAllocatableGeneralCode(reg_num)); if (!reg.is(rsp) && !reg.is(rbp) && !reg.is(destination_reg)) { __ cmpq(reg, MemOperand(rsp, 0)); __ Assert(equal, kRegisterWasClobbered); __ addq(rsp, Immediate(kPointerSize)); } } __ movq(rax, destination_reg); __ popq(rdi); __ popq(rsi); __ popq(rdx); __ popq(rcx); __ popq(rbx); __ ret(0); CodeDesc desc; assm.GetCode(isolate, &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[] = {rsp, rax, rbx, rcx, rdx, rsi, rdi, r8, r9}; Register dest_registers[] = {rax, rbx, rcx, rdx, rsi, rdi, r8, r9}; 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])); } } }