Compaq ECQD2KCTE manual Register-to-Register Move, Negate, 4.6 not, Booleans

The general sequence is:
LDA	Rdst, low(R31)
LDAH	Rdst, extra(Rdst)	! Omit if extra=0
LDAH	Rdst, high(Rdst)	! Omit if high=0

A.4.4.4 Register-to-Register Move

The standard register move forms are:

MOV RX,RY	==	BIS	RX,RX,RY
FMOV FX,FY	==	CPYS	FX,FX,FY

These move forms generate no exceptions. In most implementations, these should encounter no functional unit issue delay.

A.4.4.5 Negate

The standard register negate forms are:

NEGz Rx,Ry	==	SUBz	R31,Rx,Ry	! z = L or Q
NEGz Fx,Fy	==	SUBz	F31,Fx,Fy	! z = F G S or T
FNEGz Fx,Fy	==	CPYSN	Fx,Fx,Fy	! z = F G S or T

The integer subtract generates no Integer Overflow trap if Rx contains the largest negative number (SUBz/V would trap). The floating subtract generates a floating-point exception for a non-finite value in Fx. The CPYSN form generates no exceptions.

A.4.4.6 NOT

The standard integer register NOT form is:

NOT Rx,Ry == ORNOT R31,Rx,Ry

This generates no exceptions. In most implementations, this should encounter no functional unit issue delay.

A.4.4.7 Booleans

The standard alternative to BIS is:

OR Rx,Ry,Rz == BIS Rx,Ry,Rz

The standard alternative to BIC is:

ANDNOT Rx,Ry,Rz == BIC Rx,Ry,Rz

The standard alternative to EQV is:

XORNOT Rx,Ry,Rz == EQV Rx,Ry,Rz

Software Considerations A–13