// 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/mips/constants-mips.h" #include "src/register-configuration.h" #include "src/simulator.h" #include "test/cctest/cctest.h" #include "test/cctest/test-code-stubs.h" using namespace v8::internal; #define __ masm. ConvertDToIFunc MakeConvertDToIFuncTrampoline(Isolate* isolate, Register source_reg, Register destination_reg, bool inline_fastpath) { // 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 masm(isolate, buffer, static_cast<int>(actual_size), v8::internal::CodeObjectRequired::kYes); DoubleToIStub stub(isolate, source_reg, destination_reg, 0, true, inline_fastpath); byte* start = stub.GetCode()->instruction_start(); Label done; // Save callee save registers. __ MultiPush(kCalleeSaved | ra.bit()); // Save callee-saved FPU registers. __ MultiPushFPU(kCalleeSavedFPU); // Set up the reserved register for 0.0. __ Move(kDoubleRegZero, 0.0); // For softfp, move the input value into f12. if (IsMipsSoftFloatABI) { __ Move(f12, a0, a1); } // Push the double argument. __ Subu(sp, sp, Operand(kDoubleSize)); __ Sdc1(f12, MemOperand(sp)); __ Move(source_reg, sp); // Save registers make sure they don't get clobbered. int source_reg_offset = kDoubleSize; int reg_num = 2; for (; reg_num < Register::kNumRegisters; ++reg_num) { if (RegisterConfiguration::Crankshaft()->IsAllocatableGeneralCode( reg_num)) { Register reg = Register::from_code(reg_num); if (!reg.is(destination_reg)) { __ push(reg); source_reg_offset += kPointerSize; } } } // Re-push the double argument. __ Subu(sp, sp, Operand(kDoubleSize)); __ Sdc1(f12, MemOperand(sp)); // Call through to the actual stub if (inline_fastpath) { __ Ldc1(f12, MemOperand(source_reg)); __ TryInlineTruncateDoubleToI(destination_reg, f12, &done); if (destination_reg.is(source_reg) && !source_reg.is(sp)) { // Restore clobbered source_reg. __ Addu(source_reg, sp, Operand(source_reg_offset)); } } __ Call(start, RelocInfo::EXTERNAL_REFERENCE); __ bind(&done); __ Addu(sp, sp, Operand(kDoubleSize)); // Make sure no registers have been unexpectedly clobbered for (--reg_num; reg_num >= 2; --reg_num) { if (RegisterConfiguration::Crankshaft()->IsAllocatableGeneralCode( reg_num)) { Register reg = Register::from_code(reg_num); if (!reg.is(destination_reg)) { __ lw(at, MemOperand(sp, 0)); __ Assert(eq, kRegisterWasClobbered, reg, Operand(at)); __ Addu(sp, sp, Operand(kPointerSize)); } } } __ Addu(sp, sp, Operand(kDoubleSize)); __ Move(v0, destination_reg); Label ok; __ Branch(&ok, eq, v0, Operand(zero_reg)); __ bind(&ok); // Restore callee-saved FPU registers. __ MultiPopFPU(kCalleeSavedFPU); // Restore callee save registers. __ MultiPop(kCalleeSaved | ra.bit()); Label ok1; __ Branch(&ok1, eq, v0, Operand(zero_reg)); __ bind(&ok1); __ Ret(); CodeDesc desc; masm.GetCode(isolate, &desc); Assembler::FlushICache(isolate, buffer, actual_size); return (reinterpret_cast<ConvertDToIFunc>( reinterpret_cast<intptr_t>(buffer))); } #undef __ static Isolate* GetIsolateFrom(LocalContext* context) { return reinterpret_cast<Isolate*>((*context)->GetIsolate()); } int32_t RunGeneratedCodeCallWrapper(ConvertDToIFunc func, double from) { #ifdef USE_SIMULATOR Simulator::current(CcTest::i_isolate()) ->CallFP(FUNCTION_ADDR(func), from, 0.); return Simulator::current(CcTest::i_isolate())->get_register(v0.code()); #else return (*func)(from); #endif } 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[] = { sp, v0, v1, a0, a1, a2, a3, t0, t1, t2, t3, t4, t5}; Register dest_registers[] = { v0, v1, a0, a1, a2, a3, t0, t1, t2, t3, t4, t5}; 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( RunGeneratedCodeCallWrapper, MakeConvertDToIFuncTrampoline(isolate, source_registers[s], dest_registers[d], false)); RunAllTruncationTests( RunGeneratedCodeCallWrapper, MakeConvertDToIFuncTrampoline(isolate, source_registers[s], dest_registers[d], true)); } } }