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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef jit_ABIArgGenerator_h
#define jit_ABIArgGenerator_h
#include "mozilla/Assertions.h"
#include <stdint.h>
#include "jit/Assembler.h"
#include "jit/IonTypes.h"
#include "jit/RegisterSets.h"
#include "wasm/WasmFrame.h"
namespace js::jit {
static inline MIRType ToMIRType(MIRType t) { return t; }
static inline MIRType ToMIRType(ABIArgType argType) {
switch (argType) {
case ArgType_General:
return MIRType::Pointer;
case ArgType_Float64:
return MIRType::Double;
case ArgType_Float32:
return MIRType::Float32;
case ArgType_Int32:
return MIRType::Int32;
case ArgType_Int64:
return MIRType::Int64;
default:
break;
}
MOZ_CRASH("unexpected argType");
}
template <class VecT, class ABIArgGeneratorT>
class ABIArgIterBase {
ABIArgGeneratorT gen_;
const VecT& types_;
unsigned i_;
void settle() {
if (!done()) gen_.next(ToMIRType(types_[i_]));
}
public:
explicit ABIArgIterBase(const VecT& types) : types_(types), i_(0) {
settle();
}
void operator++(int) {
MOZ_ASSERT(!done());
i_++;
settle();
}
bool done() const { return i_ == types_.length(); }
ABIArg* operator->() {
MOZ_ASSERT(!done());
return &gen_.current();
}
ABIArg& operator*() {
MOZ_ASSERT(!done());
return gen_.current();
}
unsigned index() const {
MOZ_ASSERT(!done());
return i_;
}
MIRType mirType() const {
MOZ_ASSERT(!done());
return ToMIRType(types_[i_]);
}
uint32_t stackBytesConsumedSoFar() const {
return gen_.stackBytesConsumedSoFar();
}
};
// This is not an alias because we want to allow class template argument
// deduction.
template <class VecT>
class ABIArgIter : public ABIArgIterBase<VecT, ABIArgGenerator> {
public:
explicit ABIArgIter(const VecT& types)
: ABIArgIterBase<VecT, ABIArgGenerator>(types) {}
};
class WasmABIArgGenerator : public ABIArgGenerator {
public:
WasmABIArgGenerator() {
increaseStackOffset(wasm::FrameWithInstances::sizeOfInstanceFields());
}
};
template <class VecT>
class WasmABIArgIter : public ABIArgIterBase<VecT, WasmABIArgGenerator> {
public:
explicit WasmABIArgIter(const VecT& types)
: ABIArgIterBase<VecT, WasmABIArgGenerator>(types) {}
};
} // namespace js::jit
#endif /* jit_ABIArgGenerator_h */
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