llvm::NamedImmMapper Struct Reference

#include <AArch64BaseInfo.h>

Inheritance diagram for llvm::NamedImmMapper:

Collaboration diagram for llvm::NamedImmMapper:

Classes
struct	Mapping

Public Member Functions
template<int N>
	NamedImmMapper (const Mapping(&Pairs)[N], uint32_t TooBigImm)
StringRef	toString (uint32_t Value, bool &Valid) const
uint32_t	fromString (StringRef Name, bool &Valid) const
bool	validImm (uint32_t Value) const

Protected Attributes
const Mapping *	Pairs
size_t	NumPairs
uint32_t	TooBigImm

Detailed Description

Instances of this class can perform bidirectional mapping from random identifier strings to operand encodings. For example "MSR" takes a named system-register which must be encoded somehow and decoded for printing. This central location means that the information for those transformations is not duplicated and remains in sync.

FIXME: currently the algorithm is a completely unoptimised linear search. Obviously this could be improved, but we would probably want to work out just how often these instructions are emitted before working on it. It might even be optimal to just reorder the tables for the common instructions rather than changing the algorithm.

Definition at line 118 of file AArch64BaseInfo.h.

Constructor & Destructor Documentation

template<int N>

llvm::NamedImmMapper::NamedImmMapper ( const Mapping(&)  Pairs[N], uint32_t  TooBigImm  )

inline

Definition at line 125 of file AArch64BaseInfo.h.

Member Function Documentation

uint32_t NamedImmMapper::fromString	(	StringRef	Name,
		bool &	Valid
	)		const

Definition at line 33 of file AArch64BaseInfo.cpp.

References llvm::StringRef::lower(), NumPairs, Pairs, and llvm::NamedImmMapper::Mapping::Value.

StringRef NamedImmMapper::toString	(	uint32_t	Value,
		bool &	Valid
	)		const

Definition at line 21 of file AArch64BaseInfo.cpp.

References llvm::NamedImmMapper::Mapping::Name, NumPairs, and Pairs.

Referenced by llvm::AArch64InstPrinter::printNamedImmOperand().

bool NamedImmMapper::validImm

(

uint32_t

Value

)

const

Many of the instructions allow an alternative assembly form consisting of a simple immediate. Currently the only valid forms are ranges [0, N) where N being 0 indicates no immediate syntax-form is allowed.

Definition at line 46 of file AArch64BaseInfo.cpp.

References TooBigImm.

Member Data Documentation

size_t llvm::NamedImmMapper::NumPairs

protected

Definition at line 137 of file AArch64BaseInfo.h.

Referenced by fromString(), and toString().

const Mapping* llvm::NamedImmMapper::Pairs

protected

Definition at line 136 of file AArch64BaseInfo.h.

Referenced by fromString(), and toString().

uint32_t llvm::NamedImmMapper::TooBigImm

protected

Definition at line 138 of file AArch64BaseInfo.h.

Referenced by validImm().

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The documentation for this struct was generated from the following files:

• AArch64BaseInfo.h
• AArch64BaseInfo.cpp