ImmInfoValue Class Reference

#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.

    : pair(0, false) {
}

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.

    : pair(immediateWidth, signExtending) {
}

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.

{ 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.

{ return first; }

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

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

• ImmInfo.hh
• ImmInfo.cc