"{ Package: 'jv:dragonfly/asm' }"

"{ NameSpace: Smalltalk }"

AJx86GPRegister subclass:#AJx64RipRegister
	instanceVariableNames:''
	classVariableNames:''
	poolDictionaries:'AJx86Registers'
	category:'AsmJit-x86-Operands'
!

AJx64RipRegister comment:'Virtual registers used for relative instruction pointer addressing in 64Bit mode

In IA-32 architecture and compatibility mode, addressing relative to the instruction pointer is available only with control-transfer instructions. In 64-bit mode, instruc- tions that use ModR/M addressing can use RIP-relative addressing. Without RIP-rela- tive addressing, all ModR/M instruction modes address memory relative to zero.'
!

!AJx64RipRegister methodsFor:'accessing'!

code
    self ripAccessError
!

index
    self ripAccessError
!

influencingRegisters
    self is16
        ifFalse: [ ^ self as16 influencingRegisters ].
    ^ { self as16. self as32. self as64 }
! !

!AJx64RipRegister methodsFor:'converting'!

as16
    ^ AJx86Registers at: #IP
!

as32
    ^ AJx86Registers at: #EIP
!

as64
    ^ AJx86Registers at: #RIP
!

as8
    
    self error: 'No 8bit register available for instruction pointer relative addressing'
! !

!AJx64RipRegister methodsFor:'error'!

ripAccessError
    self error: 'RIP register ', self name, ' cannot be used only for relative addressing'
! !

!AJx64RipRegister methodsFor:'printing'!

descriptionOn: s
    s nextPutAll: 'A '; print: self size * 8; nextPutAll: 'bit instruction pointer register'.
! !

!AJx64RipRegister methodsFor:'testing'!

isGeneralPurpose
    ^ false
!

isRip
    ^ true
!

isUpperBank
    ^ false
!

isX86 
    ^ false
! !