#include <ImmInfo.hh>

Inheritance diagram for ImmInfoValue:

Collaboration diagram for ImmInfoValue:

Public Member Functions
	ImmInfoValue ()

	ImmInfoValue (int immediateWidth, bool signExtending)

int64_t	lowerBound () const

int64_t	upperBound () const

int	width () const

bool	signExtending () const

Detailed Description

The stored immediate result in ImmInfo.

Definition at line 58 of file ImmInfo.hh.

Constructor & Destructor Documentation

◆ ImmInfoValue() [1/2]

ImmInfoValue::ImmInfoValue ( )

Default constructor. Set as zero width and as zero extending.

Definition at line 164 of file ImmInfo.cc.

165 : pair(0, false) {

166 }

◆ ImmInfoValue() [2/2]

ImmInfoValue::ImmInfoValue	(	int	immediateWidth,
		bool	signExtending
	)

Constructor with the specified immediate width and sign-extension.

Definition at line 172 of file ImmInfo.cc.

173 : pair(immediateWidth, signExtending) {

174 }

Member Function Documentation

◆ lowerBound()

int64_t ImmInfoValue::lowerBound ( ) const

Return largest inclusive value that can be expressed as immediate.

Definition at line 181 of file ImmInfo.cc.

                                {
     if (second) { // is sign extending?
         return -(1ll << (first-1));
     } else { // is then zero extending.
         return 0;
     }
 }

◆ signExtending()

bool ImmInfoValue::signExtending ( ) const

inline

Return true if the immediate is sign extending.

Definition at line 75 of file ImmInfo.hh.

75 { return second; }

Referenced by ImmInfo::canTakeImmediate().

◆ upperBound()

int64_t ImmInfoValue::upperBound ( ) const

Return smallest inclusive value that can be expressed as immediate.

Definition at line 193 of file ImmInfo.cc.

                                {
     if (second) { // is sign extending?
         return (1ll << (first-1))-1;
     } else { // is then zero extending.
         return (1ll << (first));
     }
 }

◆ width()

int ImmInfoValue::width ( ) const

inline

Returns bit width of the immediate.

Definition at line 71 of file ImmInfo.hh.

71 { return first; }

Referenced by ImmInfo::canTakeImmediate(), and ImmInfo::canTakeImmediateByWidth().

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

Public Member Functions