diff options
Diffstat (limited to 'src/3rdparty/v8/src/ia32/register-allocator-ia32.cc')
| -rw-r--r-- | src/3rdparty/v8/src/ia32/register-allocator-ia32.cc | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/src/3rdparty/v8/src/ia32/register-allocator-ia32.cc b/src/3rdparty/v8/src/ia32/register-allocator-ia32.cc new file mode 100644 index 0000000..6db13d4 --- /dev/null +++ b/src/3rdparty/v8/src/ia32/register-allocator-ia32.cc @@ -0,0 +1,157 @@ +// Copyright 2008 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 "v8.h" + +#if defined(V8_TARGET_ARCH_IA32) + +#include "codegen-inl.h" +#include "register-allocator-inl.h" +#include "virtual-frame-inl.h" + +namespace v8 { +namespace internal { + +// ------------------------------------------------------------------------- +// Result implementation. + +void Result::ToRegister() { + ASSERT(is_valid()); + if (is_constant()) { + CodeGenerator* code_generator = + CodeGeneratorScope::Current(Isolate::Current()); + Result fresh = code_generator->allocator()->Allocate(); + ASSERT(fresh.is_valid()); + if (is_untagged_int32()) { + fresh.set_untagged_int32(true); + if (handle()->IsSmi()) { + code_generator->masm()->Set( + fresh.reg(), + Immediate(Smi::cast(*handle())->value())); + } else if (handle()->IsHeapNumber()) { + double double_value = HeapNumber::cast(*handle())->value(); + int32_t value = DoubleToInt32(double_value); + if (double_value == 0 && signbit(double_value)) { + // Negative zero must not be converted to an int32 unless + // the context allows it. + code_generator->unsafe_bailout_->Branch(equal); + code_generator->unsafe_bailout_->Branch(not_equal); + } else if (double_value == value) { + code_generator->masm()->Set(fresh.reg(), Immediate(value)); + } else { + code_generator->unsafe_bailout_->Branch(equal); + code_generator->unsafe_bailout_->Branch(not_equal); + } + } else { + // Constant is not a number. This was not predicted by AST analysis. + code_generator->unsafe_bailout_->Branch(equal); + code_generator->unsafe_bailout_->Branch(not_equal); + } + } else if (code_generator->IsUnsafeSmi(handle())) { + code_generator->MoveUnsafeSmi(fresh.reg(), handle()); + } else { + code_generator->masm()->Set(fresh.reg(), Immediate(handle())); + } + // This result becomes a copy of the fresh one. + fresh.set_type_info(type_info()); + *this = fresh; + } + ASSERT(is_register()); +} + + +void Result::ToRegister(Register target) { + CodeGenerator* code_generator = + CodeGeneratorScope::Current(Isolate::Current()); + ASSERT(is_valid()); + if (!is_register() || !reg().is(target)) { + Result fresh = code_generator->allocator()->Allocate(target); + ASSERT(fresh.is_valid()); + if (is_register()) { + code_generator->masm()->mov(fresh.reg(), reg()); + } else { + ASSERT(is_constant()); + if (is_untagged_int32()) { + if (handle()->IsSmi()) { + code_generator->masm()->Set( + fresh.reg(), + Immediate(Smi::cast(*handle())->value())); + } else { + ASSERT(handle()->IsHeapNumber()); + double double_value = HeapNumber::cast(*handle())->value(); + int32_t value = DoubleToInt32(double_value); + if (double_value == 0 && signbit(double_value)) { + // Negative zero must not be converted to an int32 unless + // the context allows it. + code_generator->unsafe_bailout_->Branch(equal); + code_generator->unsafe_bailout_->Branch(not_equal); + } else if (double_value == value) { + code_generator->masm()->Set(fresh.reg(), Immediate(value)); + } else { + code_generator->unsafe_bailout_->Branch(equal); + code_generator->unsafe_bailout_->Branch(not_equal); + } + } + } else { + if (code_generator->IsUnsafeSmi(handle())) { + code_generator->MoveUnsafeSmi(fresh.reg(), handle()); + } else { + code_generator->masm()->Set(fresh.reg(), Immediate(handle())); + } + } + } + fresh.set_type_info(type_info()); + fresh.set_untagged_int32(is_untagged_int32()); + *this = fresh; + } else if (is_register() && reg().is(target)) { + ASSERT(code_generator->has_valid_frame()); + code_generator->frame()->Spill(target); + ASSERT(code_generator->allocator()->count(target) == 1); + } + ASSERT(is_register()); + ASSERT(reg().is(target)); +} + + +// ------------------------------------------------------------------------- +// RegisterAllocator implementation. + +Result RegisterAllocator::AllocateByteRegisterWithoutSpilling() { + Result result = AllocateWithoutSpilling(); + // Check that the register is a byte register. If not, unuse the + // register if valid and return an invalid result. + if (result.is_valid() && !result.reg().is_byte_register()) { + result.Unuse(); + return Result(); + } + return result; +} + + +} } // namespace v8::internal + +#endif // V8_TARGET_ARCH_IA32 |