MCRegisterInfo.h File Reference

#include "capstone/platform.h"

Go to the source code of this file.

Classes
struct	MCRegisterClass
struct	MCRegisterDesc
struct	MCRegisterInfo

Typedefs
typedef uint16_t	MCPhysReg
typedef const MCPhysReg *	iterator
typedef struct MCRegisterClass	MCRegisterClass
typedef struct MCRegisterDesc	MCRegisterDesc
typedef struct MCRegisterInfo	MCRegisterInfo

Functions
void	MCRegisterInfo_InitMCRegisterInfo (MCRegisterInfo *RI, const MCRegisterDesc *D, unsigned NR, unsigned RA, unsigned PC, const MCRegisterClass *C, unsigned NC, uint16_t(*RURoots)[2], unsigned NRU, const MCPhysReg *DL, const char *Strings, const uint16_t *SubIndices, unsigned NumIndices, const uint16_t *RET)
unsigned	MCRegisterInfo_getMatchingSuperReg (const MCRegisterInfo *RI, unsigned Reg, unsigned SubIdx, const MCRegisterClass *RC)
unsigned	MCRegisterInfo_getSubReg (const MCRegisterInfo *RI, unsigned Reg, unsigned Idx)
const MCRegisterClass *	MCRegisterInfo_getRegClass (const MCRegisterInfo *RI, unsigned i)
bool	MCRegisterClass_contains (const MCRegisterClass *c, unsigned Reg)

Typedef Documentation

iterator

typedef const MCPhysReg* iterator

Definition at line 27 of file MCRegisterInfo.h.

MCPhysReg

typedef uint16_t MCPhysReg

An unsigned integer type large enough to represent all physical registers, but not necessarily virtual registers.

Definition at line 26 of file MCRegisterInfo.h.

MCRegisterClass

typedef struct MCRegisterClass MCRegisterClass

MCRegisterDesc

typedef struct MCRegisterDesc MCRegisterDesc

MCRegisterDesc - This record contains information about a particular register. The SubRegs field is a zero terminated array of registers that are sub-registers of the specific register, e.g. AL, AH are sub-registers of AX. The SuperRegs field is a zero terminated array of registers that are super-registers of the specific register, e.g. RAX, EAX, are super-registers of AX.

MCRegisterInfo

typedef struct MCRegisterInfo MCRegisterInfo

MCRegisterInfo base class - We assume that the target defines a static array of MCRegisterDesc objects that represent all of the machine registers that the target has. As such, we simply have to track a pointer to this array so that we can turn register number into a register descriptor.

Note this class is designed to be a base class of TargetRegisterInfo, which is the interface used by codegen. However, specific targets should never specialize this class. MCRegisterInfo should only contain getters to access TableGen generated physical register data. It must not be extended with virtual methods.

Function Documentation

MCRegisterClass_contains()

bool MCRegisterClass_contains	(	const MCRegisterClass *	c,
		unsigned	Reg
	)

Definition at line 134 of file MCRegisterInfo.c.

{
    unsigned InByte = Reg % 8;
    unsigned Byte = Reg / 8;
 
    if (Byte >= c->RegSetSize)
        return false;
 
    return (c->RegSet[Byte] & (1 << InByte)) != 0;
}

References c.

Referenced by MCRegisterInfo_getMatchingSuperReg().

MCRegisterInfo_getMatchingSuperReg()

unsigned MCRegisterInfo_getMatchingSuperReg	(	const MCRegisterInfo *	RI,
		unsigned	Reg,
		unsigned	SubIdx,
		const MCRegisterClass *	RC
	)

Definition at line 86 of file MCRegisterInfo.c.

{
    DiffListIterator iter;
 
    if (Reg >= RI->NumRegs) {
        return 0;
    }
 
    DiffListIterator_init(&iter, (MCPhysReg)Reg, RI->DiffLists + RI->Desc[Reg].SuperRegs);
    DiffListIterator_next(&iter);
 
    while(DiffListIterator_isValid(&iter)) {
        uint16_t val = DiffListIterator_getVal(&iter);
        if (MCRegisterClass_contains(RC, val) && Reg ==  MCRegisterInfo_getSubReg(RI, val, SubIdx))
            return val;
 
        DiffListIterator_next(&iter);
    }
 
    return 0;
}

References MCRegisterInfo::Desc, DiffListIterator_getVal(), DiffListIterator_init(), DiffListIterator_isValid(), DiffListIterator_next(), MCRegisterInfo::DiffLists, MCRegisterClass_contains(), MCRegisterInfo_getSubReg(), MCRegisterInfo::NumRegs, MCRegisterDesc::SuperRegs, and val.

MCRegisterInfo_getRegClass()

const MCRegisterClass* MCRegisterInfo_getRegClass	(	const MCRegisterInfo *	RI,
		unsigned	i
	)

Definition at line 126 of file MCRegisterInfo.c.

{
    //assert(i < getNumRegClasses() && "Register Class ID out of range");
    if (i >= RI->NumClasses)
        return 0;
    return &(RI->Classes[i]);
}

References MCRegisterInfo::Classes, i, and MCRegisterInfo::NumClasses.

MCRegisterInfo_getSubReg()

unsigned MCRegisterInfo_getSubReg	(	const MCRegisterInfo *	RI,
		unsigned	Reg,
		unsigned	Idx
	)

Definition at line 108 of file MCRegisterInfo.c.

{
    DiffListIterator iter;
    const uint16_t *SRI = RI->SubRegIndices + RI->Desc[Reg].SubRegIndices;
 
    DiffListIterator_init(&iter, (MCPhysReg)Reg, RI->DiffLists + RI->Desc[Reg].SubRegs);
    DiffListIterator_next(&iter);
 
    while(DiffListIterator_isValid(&iter)) {
        if (*SRI == Idx)
            return DiffListIterator_getVal(&iter);
        DiffListIterator_next(&iter);
        ++SRI;
    }
 
    return 0;
}

References MCRegisterInfo::Desc, DiffListIterator_getVal(), DiffListIterator_init(), DiffListIterator_isValid(), DiffListIterator_next(), MCRegisterInfo::DiffLists, MCRegisterDesc::SubRegIndices, MCRegisterInfo::SubRegIndices, and MCRegisterDesc::SubRegs.

Referenced by MCRegisterInfo_getMatchingSuperReg().

MCRegisterInfo_InitMCRegisterInfo()

void MCRegisterInfo_InitMCRegisterInfo	(	MCRegisterInfo *	RI,
		const MCRegisterDesc *	D,
		unsigned	NR,
		unsigned	RA,
		unsigned	PC,
		const MCRegisterClass *	C,
		unsigned	NC,
		uint16_t(*)	RURoots[2],
		unsigned	NRU,
		const MCPhysReg *	DL,
		const char *	Strings,
		const uint16_t *	SubIndices,
		unsigned	NumIndices,
		const uint16_t *	RET
	)

Definition at line 28 of file MCRegisterInfo.c.

{
    RI->Desc = D;
    RI->NumRegs = NR;
    RI->RAReg = RA;
    RI->PCReg = PC;
    RI->Classes = C;
    RI->DiffLists = DL;
    RI->RegStrings = Strings;
    RI->NumClasses = NC;
    RI->RegUnitRoots = RURoots;
    RI->NumRegUnits = NRU;
    RI->SubRegIndices = SubIndices;
    RI->NumSubRegIndices = NumIndices;
    RI->RegEncodingTable = RET;
}

References C, MCRegisterInfo::Classes, D, MCRegisterInfo::Desc, MCRegisterInfo::DiffLists, NC, MCRegisterInfo::NumClasses, MCRegisterInfo::NumRegs, MCRegisterInfo::NumRegUnits, MCRegisterInfo::NumSubRegIndices, PC, MCRegisterInfo::PCReg, MCRegisterInfo::RAReg, MCRegisterInfo::RegEncodingTable, MCRegisterInfo::RegStrings, MCRegisterInfo::RegUnitRoots, RET, and MCRegisterInfo::SubRegIndices.