// Copyright 2016, VIXL authors
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of ARM Limited nor the names of its contributors may be
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef VIXL_MACRO_ASSEMBLER_INTERFACE_H
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#define VIXL_MACRO_ASSEMBLER_INTERFACE_H
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#include "assembler-base-vixl.h"
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namespace vixl {
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class MacroAssemblerInterface {
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public:
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virtual internal::AssemblerBase* AsAssemblerBase() = 0;
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virtual ~MacroAssemblerInterface() {}
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virtual bool AllowMacroInstructions() const = 0;
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virtual bool ArePoolsBlocked() const = 0;
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protected:
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virtual void SetAllowMacroInstructions(bool allow) = 0;
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virtual void BlockPools() = 0;
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virtual void ReleasePools() = 0;
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virtual void EnsureEmitPoolsFor(size_t size) = 0;
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// Emit the branch over a literal/veneer pool, and any necessary padding
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// before it.
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virtual void EmitPoolHeader() = 0;
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// When this is called, the label used for branching over the pool is bound.
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// This can also generate additional padding, which must correspond to the
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// alignment_ value passed to the PoolManager (which needs to keep track of
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// the exact size of the generated pool).
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virtual void EmitPoolFooter() = 0;
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// Emit n bytes of padding that does not have to be executable.
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virtual void EmitPaddingBytes(int n) = 0;
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// Emit n bytes of padding that has to be executable. Implementations must
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// make sure this is a multiple of the instruction size.
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virtual void EmitNopBytes(int n) = 0;
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// The following scopes need access to the above method in order to implement
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// pool blocking and temporarily disable the macro-assembler.
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friend class ExactAssemblyScope;
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friend class EmissionCheckScope;
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template <typename T>
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friend class PoolManager;
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};
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} // namespace vixl
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#endif // VIXL_MACRO_ASSEMBLER_INTERFACE_H
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