| /* |
| * Copyright (C) 2016-2017 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 "config.h" |
| #include "AirCCallingConvention.h" |
| |
| #if ENABLE(B3_JIT) |
| |
| #include "AirCCallSpecial.h" |
| #include "AirCode.h" |
| #include "B3CCallValue.h" |
| #include "B3ValueInlines.h" |
| |
| namespace JSC { namespace B3 { namespace Air { |
| |
| namespace { |
| |
| template<typename BankInfo> |
| Arg marshallCCallArgumentImpl(unsigned& argumentCount, unsigned& stackOffset, Value* child) |
| { |
| unsigned argumentIndex = argumentCount++; |
| if (argumentIndex < BankInfo::numberOfArgumentRegisters) |
| return Tmp(BankInfo::toArgumentRegister(argumentIndex)); |
| |
| unsigned slotSize; |
| if (isARM64() && isDarwin()) { |
| // Arguments are packed. |
| slotSize = sizeofType(child->type()); |
| } else { |
| // Arguments are aligned. |
| slotSize = 8; |
| } |
| |
| stackOffset = WTF::roundUpToMultipleOf(slotSize, stackOffset); |
| Arg result = Arg::callArg(stackOffset); |
| stackOffset += slotSize; |
| return result; |
| } |
| |
| Arg marshallCCallArgument( |
| unsigned& gpArgumentCount, unsigned& fpArgumentCount, unsigned& stackOffset, Value* child) |
| { |
| switch (bankForType(child->type())) { |
| case GP: |
| return marshallCCallArgumentImpl<GPRInfo>(gpArgumentCount, stackOffset, child); |
| case FP: |
| return marshallCCallArgumentImpl<FPRInfo>(fpArgumentCount, stackOffset, child); |
| } |
| RELEASE_ASSERT_NOT_REACHED(); |
| return Arg(); |
| } |
| |
| } // anonymous namespace |
| |
| Vector<Arg> computeCCallingConvention(Code& code, CCallValue* value) |
| { |
| Vector<Arg> result; |
| result.append(Tmp(CCallSpecial::scratchRegister)); |
| unsigned gpArgumentCount = 0; |
| unsigned fpArgumentCount = 0; |
| unsigned stackOffset = 0; |
| for (unsigned i = 1; i < value->numChildren(); ++i) { |
| result.append( |
| marshallCCallArgument(gpArgumentCount, fpArgumentCount, stackOffset, value->child(i))); |
| } |
| code.requestCallArgAreaSizeInBytes(WTF::roundUpToMultipleOf(stackAlignmentBytes(), stackOffset)); |
| return result; |
| } |
| |
| Tmp cCallResult(Type type) |
| { |
| switch (type.kind()) { |
| case Void: |
| return Tmp(); |
| case Int32: |
| case Int64: |
| return Tmp(GPRInfo::returnValueGPR); |
| case Float: |
| case Double: |
| return Tmp(FPRInfo::returnValueFPR); |
| case Tuple: |
| break; |
| } |
| |
| RELEASE_ASSERT_NOT_REACHED(); |
| return Tmp(); |
| } |
| |
| Inst buildCCall(Code& code, Value* origin, const Vector<Arg>& arguments) |
| { |
| Inst inst(Patch, origin, Arg::special(code.cCallSpecial())); |
| inst.args.append(arguments[0]); |
| inst.args.append(Tmp(GPRInfo::returnValueGPR)); |
| inst.args.append(Tmp(GPRInfo::returnValueGPR2)); |
| inst.args.append(Tmp(FPRInfo::returnValueFPR)); |
| for (unsigned i = 1; i < arguments.size(); ++i) { |
| Arg arg = arguments[i]; |
| if (arg.isTmp()) |
| inst.args.append(arg); |
| } |
| return inst; |
| } |
| |
| } } } // namespace JSC::B3::Air |
| |
| #endif // ENABLE(B3_JIT) |
| |